LinuxLists.cc - [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent

2024-04-29 18:44:47

Subject: [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent_cache

Hello,

syzbot found the following issue on:

HEAD commit: e67572cd2204 Linux 6.9-rc6
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=13724f0f180000
kernel config: https://syzkaller.appspot.com/x/.config?x=d2f00edef461175
dashboard link: https://syzkaller.appspot.com/bug?extid=74ebe2104433e9dc610d
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16938440980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13ae8517180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/526d150815dd/disk-e67572cd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/03cba3db92e8/vmlinux-e67572cd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ec3f54fc8985/bzImage-e67572cd.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/21aa65da230a/mount_0.gz

The issue was bisected to:

commit a53936361330e4c55c0654605178281387d9c761
Author: Chao Yu <[email protected]>
Date: Sun Dec 10 09:20:35 2023 +0000

f2fs: delete obsolete FI_FIRST_BLOCK_WRITTEN

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11b78440980000
final oops: https://syzkaller.appspot.com/x/report.txt?x=13b78440980000
console output: https://syzkaller.appspot.com/x/log.txt?x=15b78440980000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
Fixes: a53936361330 ("f2fs: delete obsolete FI_FIRST_BLOCK_WRITTEN")

R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b853316dc
R13: 00007f3b852f8160 R14: 0030656c69662f2e R15: 00007ffdc8faca88
</TASK>
==================================================================
BUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46
Read of size 4 at addr ffff8880739ab220 by task syz-executor200/5097

CPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46
do_read_inode fs/f2fs/inode.c:509 [inline]
f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560
f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
do_handle_to_path fs/fhandle.c:155 [inline]
handle_to_path fs/fhandle.c:210 [inline]
do_handle_open+0x495/0x650 fs/fhandle.c:226
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3b852ab889
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 1b 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3b85239228 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007f3b853316d8 RCX: 00007f3b852ab889
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007f3b853316d0 R08: 00007ffdc8faca87 R09: 00007f3b852396c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b853316dc
R13: 00007f3b852f8160 R14: 0030656c69662f2e R15: 00007ffdc8faca88
</TASK>

Allocated by task 5092:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc+0x174/0x340 mm/slub.c:3852
f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2817 [inline]
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2827 [inline]
__grab_extent_tree+0x183/0x400 fs/f2fs/extent_cache.c:334
f2fs_init_read_extent_tree+0x455/0x910 fs/f2fs/extent_cache.c:405
do_read_inode fs/f2fs/inode.c:506 [inline]
f2fs_iget+0x33d1/0x46e0 fs/f2fs/inode.c:560
f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
do_handle_to_path fs/fhandle.c:155 [inline]
handle_to_path fs/fhandle.c:210 [inline]
do_handle_open+0x495/0x650 fs/fhandle.c:226
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5092:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kmem_cache_free+0x10b/0x2c0 mm/slub.c:4344
__destroy_extent_tree+0x307/0x600 fs/f2fs/extent_cache.c:1132
f2fs_destroy_extent_tree+0x17/0x30 fs/f2fs/extent_cache.c:1143
f2fs_evict_inode+0x44d/0x1550 fs/f2fs/inode.c:831
evict+0x2a8/0x630 fs/inode.c:667
f2fs_iget+0x1a68/0x46e0 fs/f2fs/inode.c:621
f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
do_handle_to_path fs/fhandle.c:155 [inline]
handle_to_path fs/fhandle.c:210 [inline]
do_handle_open+0x495/0x650 fs/fhandle.c:226
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880739ab1a0
which belongs to the cache f2fs_extent_tree of size 144
The buggy address is located 128 bytes inside of
freed 144-byte region [ffff8880739ab1a0, ffff8880739ab230)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x739ab
flags: 0xfff80000000800(slab|node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000800 ffff88801afb08c0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080130013 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x12c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_RECLAIMABLE), pid 5076, tgid -326355158 (syz-executor200), ts 5083, free_ts 26740999480
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
__alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page+0x5f/0x160 mm/slub.c:2175
allocate_slab mm/slub.c:2338 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2391
___slab_alloc+0xc73/0x1260 mm/slub.c:3525
__slab_alloc mm/slub.c:3610 [inline]
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
kmem_cache_alloc+0x252/0x340 mm/slub.c:3852
f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2817 [inline]
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2827 [inline]
__grab_extent_tree+0x183/0x400 fs/f2fs/extent_cache.c:334
f2fs_init_read_extent_tree+0x455/0x910 fs/f2fs/extent_cache.c:405
do_read_inode fs/f2fs/inode.c:506 [inline]
f2fs_iget+0x33d1/0x46e0 fs/f2fs/inode.c:560
f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
do_handle_to_path fs/fhandle.c:155 [inline]
handle_to_path fs/fhandle.c:210 [inline]
do_handle_open+0x495/0x650 fs/fhandle.c:226
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
free_contig_range+0x9e/0x160 mm/page_alloc.c:6572
destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1036
debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1416
do_one_initcall+0x248/0x880 init/main.c:1245
do_initcall_level+0x157/0x210 init/main.c:1307
do_initcalls+0x3f/0x80 init/main.c:1323
kernel_init_freeable+0x435/0x5d0 init/main.c:1555
kernel_init+0x1d/0x2b0 init/main.c:1444
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
ffff8880739ab100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff8880739ab180: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb
>ffff8880739ab200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
^
ffff8880739ab280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880739ab300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at [email protected].

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

2024-05-03 11:05:07

by syzbot

[permalink] [raw]

Subject: Re: [syzbot] Re: [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent_cache

For archival purposes, forwarding an incoming command email to
[email protected], [email protected].

***

Subject: Re: [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent_cache
Author: [email protected]

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git bugfix/syzbot

On 2024/4/30 2:44, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: e67572cd2204 Linux 6.9-rc6
> git tree: upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=13724f0f180000
> kernel config: https://syzkaller.appspot.com/x/.config?x=d2f00edef461175
> dashboard link: https://syzkaller.appspot.com/bug?extid=74ebe2104433e9dc610d
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16938440980000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13ae8517180000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/526d150815dd/disk-e67572cd.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/03cba3db92e8/vmlinux-e67572cd.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/ec3f54fc8985/bzImage-e67572cd.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/21aa65da230a/mount_0.gz
>
> The issue was bisected to:
>
> commit a53936361330e4c55c0654605178281387d9c761
> Author: Chao Yu <[email protected]>
> Date: Sun Dec 10 09:20:35 2023 +0000
>
> f2fs: delete obsolete FI_FIRST_BLOCK_WRITTEN
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11b78440980000
> final oops: https://syzkaller.appspot.com/x/report.txt?x=13b78440980000
> console output: https://syzkaller.appspot.com/x/log.txt?x=15b78440980000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: [email protected]
> Fixes: a53936361330 ("f2fs: delete obsolete FI_FIRST_BLOCK_WRITTEN")
>
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b853316dc
> R13: 00007f3b852f8160 R14: 0030656c69662f2e R15: 00007ffdc8faca88
> </TASK>
> ==================================================================
> BUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46
> Read of size 4 at addr ffff8880739ab220 by task syz-executor200/5097
>
> CPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
> Call Trace:
> <TASK>
> __dump_stack lib/dump_stack.c:88 [inline]
> dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
> print_address_description mm/kasan/report.c:377 [inline]
> print_report+0x169/0x550 mm/kasan/report.c:488
> kasan_report+0x143/0x180 mm/kasan/report.c:601
> sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46
> do_read_inode fs/f2fs/inode.c:509 [inline]
> f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560
> f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
> generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
> exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
> exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
> do_handle_to_path fs/fhandle.c:155 [inline]
> handle_to_path fs/fhandle.c:210 [inline]
> do_handle_open+0x495/0x650 fs/fhandle.c:226
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7f3b852ab889
> Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 1b 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007f3b85239228 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
> RAX: ffffffffffffffda RBX: 00007f3b853316d8 RCX: 00007f3b852ab889
> RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
> RBP: 00007f3b853316d0 R08: 00007ffdc8faca87 R09: 00007f3b852396c0
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b853316dc
> R13: 00007f3b852f8160 R14: 0030656c69662f2e R15: 00007ffdc8faca88
> </TASK>
>
> Allocated by task 5092:
> kasan_save_stack mm/kasan/common.c:47 [inline]
> kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
> unpoison_slab_object mm/kasan/common.c:312 [inline]
> __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
> kasan_slab_alloc include/linux/kasan.h:201 [inline]
> slab_post_alloc_hook mm/slub.c:3798 [inline]
> slab_alloc_node mm/slub.c:3845 [inline]
> kmem_cache_alloc+0x174/0x340 mm/slub.c:3852
> f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2817 [inline]
> f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2827 [inline]
> __grab_extent_tree+0x183/0x400 fs/f2fs/extent_cache.c:334
> f2fs_init_read_extent_tree+0x455/0x910 fs/f2fs/extent_cache.c:405
> do_read_inode fs/f2fs/inode.c:506 [inline]
> f2fs_iget+0x33d1/0x46e0 fs/f2fs/inode.c:560
> f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
> generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
> exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
> exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
> do_handle_to_path fs/fhandle.c:155 [inline]
> handle_to_path fs/fhandle.c:210 [inline]
> do_handle_open+0x495/0x650 fs/fhandle.c:226
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Freed by task 5092:
> kasan_save_stack mm/kasan/common.c:47 [inline]
> kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
> kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
> poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
> __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
> kasan_slab_free include/linux/kasan.h:184 [inline]
> slab_free_hook mm/slub.c:2106 [inline]
> slab_free mm/slub.c:4280 [inline]
> kmem_cache_free+0x10b/0x2c0 mm/slub.c:4344
> __destroy_extent_tree+0x307/0x600 fs/f2fs/extent_cache.c:1132
> f2fs_destroy_extent_tree+0x17/0x30 fs/f2fs/extent_cache.c:1143
> f2fs_evict_inode+0x44d/0x1550 fs/f2fs/inode.c:831
> evict+0x2a8/0x630 fs/inode.c:667
> f2fs_iget+0x1a68/0x46e0 fs/f2fs/inode.c:621
> f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
> generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
> exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
> exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
> do_handle_to_path fs/fhandle.c:155 [inline]
> handle_to_path fs/fhandle.c:210 [inline]
> do_handle_open+0x495/0x650 fs/fhandle.c:226
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> The buggy address belongs to the object at ffff8880739ab1a0
> which belongs to the cache f2fs_extent_tree of size 144
> The buggy address is located 128 bytes inside of
> freed 144-byte region [ffff8880739ab1a0, ffff8880739ab230)
>
> The buggy address belongs to the physical page:
> page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x739ab
> flags: 0xfff80000000800(slab|node=0|zone=1|lastcpupid=0xfff)
> page_type: 0xffffffff()
> raw: 00fff80000000800 ffff88801afb08c0 dead000000000122 0000000000000000
> raw: 0000000000000000 0000000080130013 00000001ffffffff 0000000000000000
> page dumped because: kasan: bad access detected
> page_owner tracks the page as allocated
> page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x12c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_RECLAIMABLE), pid 5076, tgid -326355158 (syz-executor200), ts 5083, free_ts 26740999480
> set_page_owner include/linux/page_owner.h:32 [inline]
> post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
> prep_new_page mm/page_alloc.c:1541 [inline]
> get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
> __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
> __alloc_pages_node include/linux/gfp.h:238 [inline]
> alloc_pages_node include/linux/gfp.h:261 [inline]
> alloc_slab_page+0x5f/0x160 mm/slub.c:2175
> allocate_slab mm/slub.c:2338 [inline]
> new_slab+0x84/0x2f0 mm/slub.c:2391
> ___slab_alloc+0xc73/0x1260 mm/slub.c:3525
> __slab_alloc mm/slub.c:3610 [inline]
> __slab_alloc_node mm/slub.c:3663 [inline]
> slab_alloc_node mm/slub.c:3835 [inline]
> kmem_cache_alloc+0x252/0x340 mm/slub.c:3852
> f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2817 [inline]
> f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2827 [inline]
> __grab_extent_tree+0x183/0x400 fs/f2fs/extent_cache.c:334
> f2fs_init_read_extent_tree+0x455/0x910 fs/f2fs/extent_cache.c:405
> do_read_inode fs/f2fs/inode.c:506 [inline]
> f2fs_iget+0x33d1/0x46e0 fs/f2fs/inode.c:560
> f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
> generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
> exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
> exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
> do_handle_to_path fs/fhandle.c:155 [inline]
> handle_to_path fs/fhandle.c:210 [inline]
> do_handle_open+0x495/0x650 fs/fhandle.c:226
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
> page last free pid 1 tgid 1 stack trace:
> reset_page_owner include/linux/page_owner.h:25 [inline]
> free_pages_prepare mm/page_alloc.c:1141 [inline]
> free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347
> free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
> free_contig_range+0x9e/0x160 mm/page_alloc.c:6572
> destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1036
> debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1416
> do_one_initcall+0x248/0x880 init/main.c:1245
> do_initcall_level+0x157/0x210 init/main.c:1307
> do_initcalls+0x3f/0x80 init/main.c:1323
> kernel_init_freeable+0x435/0x5d0 init/main.c:1555
> kernel_init+0x1d/0x2b0 init/main.c:1444
> ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
>
> Memory state around the buggy address:
> ffff8880739ab100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
> ffff8880739ab180: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb
>> ffff8880739ab200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
> ^
> ffff8880739ab280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> ffff8880739ab300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> ==================================================================
>
>
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at [email protected].
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>
> If the report is already addressed, let syzbot know by replying with:
> #syz fix: exact-commit-title
>
> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before testing.
>
> If you want to overwrite report's subsystems, reply with:
> #syz set subsystems: new-subsystem
> (See the list of subsystem names on the web dashboard)
>
> If the report is a duplicate of another one, reply with:
> #syz dup: exact-subject-of-another-report
>
> If you want to undo deduplication, reply with:
> #syz undup

2024-05-03 11:34:30

by syzbot

[permalink] [raw]

Subject: Re: [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent_cache

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: [email protected]

Tested on:

commit: e106036e f2fs: fix to do sanity check on i_nid for inl..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git bugfix/syzbot
console output: https://syzkaller.appspot.com/x/log.txt?x=13da0b54980000
kernel config: https://syzkaller.appspot.com/x/.config?x=5a05c230e142f2bc
dashboard link: https://syzkaller.appspot.com/bug?extid=74ebe2104433e9dc610d
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.

2024-05-29 11:26:44

by Chao Yu

[permalink] [raw]

Subject: Re: [f2fs-dev] [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent_cache

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git wip

On 2024/4/30 2:44, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: e67572cd2204 Linux 6.9-rc6
> git tree: upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=13724f0f180000
> kernel config: https://syzkaller.appspot.com/x/.config?x=d2f00edef461175
> dashboard link: https://syzkaller.appspot.com/bug?extid=74ebe2104433e9dc610d
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16938440980000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13ae8517180000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/526d150815dd/disk-e67572cd.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/03cba3db92e8/vmlinux-e67572cd.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/ec3f54fc8985/bzImage-e67572cd.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/21aa65da230a/mount_0.gz
>
> The issue was bisected to:
>
> commit a53936361330e4c55c0654605178281387d9c761
> Author: Chao Yu <[email protected]>
> Date: Sun Dec 10 09:20:35 2023 +0000
>
> f2fs: delete obsolete FI_FIRST_BLOCK_WRITTEN
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11b78440980000
> final oops: https://syzkaller.appspot.com/x/report.txt?x=13b78440980000
> console output: https://syzkaller.appspot.com/x/log.txt?x=15b78440980000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: [email protected]
> Fixes: a53936361330 ("f2fs: delete obsolete FI_FIRST_BLOCK_WRITTEN")
>
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b853316dc
> R13: 00007f3b852f8160 R14: 0030656c69662f2e R15: 00007ffdc8faca88
> </TASK>
> ==================================================================
> BUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46
> Read of size 4 at addr ffff8880739ab220 by task syz-executor200/5097
>
> CPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
> Call Trace:
> <TASK>
> __dump_stack lib/dump_stack.c:88 [inline]
> dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
> print_address_description mm/kasan/report.c:377 [inline]
> print_report+0x169/0x550 mm/kasan/report.c:488
> kasan_report+0x143/0x180 mm/kasan/report.c:601
> sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46
> do_read_inode fs/f2fs/inode.c:509 [inline]
> f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560
> f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
> generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
> exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
> exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
> do_handle_to_path fs/fhandle.c:155 [inline]
> handle_to_path fs/fhandle.c:210 [inline]
> do_handle_open+0x495/0x650 fs/fhandle.c:226
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7f3b852ab889
> Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 1b 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007f3b85239228 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
> RAX: ffffffffffffffda RBX: 00007f3b853316d8 RCX: 00007f3b852ab889
> RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
> RBP: 00007f3b853316d0 R08: 00007ffdc8faca87 R09: 00007f3b852396c0
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b853316dc
> R13: 00007f3b852f8160 R14: 0030656c69662f2e R15: 00007ffdc8faca88
> </TASK>
>
> Allocated by task 5092:
> kasan_save_stack mm/kasan/common.c:47 [inline]
> kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
> unpoison_slab_object mm/kasan/common.c:312 [inline]
> __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
> kasan_slab_alloc include/linux/kasan.h:201 [inline]
> slab_post_alloc_hook mm/slub.c:3798 [inline]
> slab_alloc_node mm/slub.c:3845 [inline]
> kmem_cache_alloc+0x174/0x340 mm/slub.c:3852
> f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2817 [inline]
> f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2827 [inline]
> __grab_extent_tree+0x183/0x400 fs/f2fs/extent_cache.c:334
> f2fs_init_read_extent_tree+0x455/0x910 fs/f2fs/extent_cache.c:405
> do_read_inode fs/f2fs/inode.c:506 [inline]
> f2fs_iget+0x33d1/0x46e0 fs/f2fs/inode.c:560
> f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
> generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
> exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
> exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
> do_handle_to_path fs/fhandle.c:155 [inline]
> handle_to_path fs/fhandle.c:210 [inline]
> do_handle_open+0x495/0x650 fs/fhandle.c:226
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Freed by task 5092:
> kasan_save_stack mm/kasan/common.c:47 [inline]
> kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
> kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
> poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
> __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
> kasan_slab_free include/linux/kasan.h:184 [inline]
> slab_free_hook mm/slub.c:2106 [inline]
> slab_free mm/slub.c:4280 [inline]
> kmem_cache_free+0x10b/0x2c0 mm/slub.c:4344
> __destroy_extent_tree+0x307/0x600 fs/f2fs/extent_cache.c:1132
> f2fs_destroy_extent_tree+0x17/0x30 fs/f2fs/extent_cache.c:1143
> f2fs_evict_inode+0x44d/0x1550 fs/f2fs/inode.c:831
> evict+0x2a8/0x630 fs/inode.c:667
> f2fs_iget+0x1a68/0x46e0 fs/f2fs/inode.c:621
> f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
> generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
> exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
> exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
> do_handle_to_path fs/fhandle.c:155 [inline]
> handle_to_path fs/fhandle.c:210 [inline]
> do_handle_open+0x495/0x650 fs/fhandle.c:226
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> The buggy address belongs to the object at ffff8880739ab1a0
> which belongs to the cache f2fs_extent_tree of size 144
> The buggy address is located 128 bytes inside of
> freed 144-byte region [ffff8880739ab1a0, ffff8880739ab230)
>
> The buggy address belongs to the physical page:
> page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x739ab
> flags: 0xfff80000000800(slab|node=0|zone=1|lastcpupid=0xfff)
> page_type: 0xffffffff()
> raw: 00fff80000000800 ffff88801afb08c0 dead000000000122 0000000000000000
> raw: 0000000000000000 0000000080130013 00000001ffffffff 0000000000000000
> page dumped because: kasan: bad access detected
> page_owner tracks the page as allocated
> page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x12c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_RECLAIMABLE), pid 5076, tgid -326355158 (syz-executor200), ts 5083, free_ts 26740999480
> set_page_owner include/linux/page_owner.h:32 [inline]
> post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
> prep_new_page mm/page_alloc.c:1541 [inline]
> get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
> __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
> __alloc_pages_node include/linux/gfp.h:238 [inline]
> alloc_pages_node include/linux/gfp.h:261 [inline]
> alloc_slab_page+0x5f/0x160 mm/slub.c:2175
> allocate_slab mm/slub.c:2338 [inline]
> new_slab+0x84/0x2f0 mm/slub.c:2391
> ___slab_alloc+0xc73/0x1260 mm/slub.c:3525
> __slab_alloc mm/slub.c:3610 [inline]
> __slab_alloc_node mm/slub.c:3663 [inline]
> slab_alloc_node mm/slub.c:3835 [inline]
> kmem_cache_alloc+0x252/0x340 mm/slub.c:3852
> f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2817 [inline]
> f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2827 [inline]
> __grab_extent_tree+0x183/0x400 fs/f2fs/extent_cache.c:334
> f2fs_init_read_extent_tree+0x455/0x910 fs/f2fs/extent_cache.c:405
> do_read_inode fs/f2fs/inode.c:506 [inline]
> f2fs_iget+0x33d1/0x46e0 fs/f2fs/inode.c:560
> f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237
> generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413
> exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444
> exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584
> do_handle_to_path fs/fhandle.c:155 [inline]
> handle_to_path fs/fhandle.c:210 [inline]
> do_handle_open+0x495/0x650 fs/fhandle.c:226
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
> page last free pid 1 tgid 1 stack trace:
> reset_page_owner include/linux/page_owner.h:25 [inline]
> free_pages_prepare mm/page_alloc.c:1141 [inline]
> free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347
> free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
> free_contig_range+0x9e/0x160 mm/page_alloc.c:6572
> destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1036
> debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1416
> do_one_initcall+0x248/0x880 init/main.c:1245
> do_initcall_level+0x157/0x210 init/main.c:1307
> do_initcalls+0x3f/0x80 init/main.c:1323
> kernel_init_freeable+0x435/0x5d0 init/main.c:1555
> kernel_init+0x1d/0x2b0 init/main.c:1444
> ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
>
> Memory state around the buggy address:
> ffff8880739ab100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
> ffff8880739ab180: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb
>> ffff8880739ab200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
> ^
> ffff8880739ab280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> ffff8880739ab300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> ==================================================================
>
>
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at [email protected].
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>
> If the report is already addressed, let syzbot know by replying with:
> #syz fix: exact-commit-title
>
> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before testing.
>
> If you want to overwrite report's subsystems, reply with:
> #syz set subsystems: new-subsystem
> (See the list of subsystem names on the web dashboard)
>
> If the report is a duplicate of another one, reply with:
> #syz dup: exact-subject-of-another-report
>
> If you want to undo deduplication, reply with:
> #syz undup
>
>
> _______________________________________________
> Linux-f2fs-devel mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

2024-05-29 11:48:13

by syzbot

[permalink] [raw]

Subject: Re: [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent_cache

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

42][ T1] usbcore: registered new interface driver dln2
[ 7.576709][ T1] usbcore: registered new interface driver pn533_usb
[ 7.583988][ T1] nfcsim 0.2 initialized
[ 7.586139][ T1] usbcore: registered new interface driver port100
[ 7.587701][ T1] usbcore: registered new interface driver nfcmrvl
[ 7.594256][ T1] Loading iSCSI transport class v2.0-870.
[ 7.612218][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[ 7.621827][ T1] ------------[ cut here ]------------
[ 7.622778][ T1] refcount_t: decrement hit 0; leaking memory.
[ 7.626782][ T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
[ 7.628293][ T1] Modules linked in:
[ 7.628860][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc1-syzkaller-00060-g889914b5c209 #0
[ 7.630401][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
[ 7.632495][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[ 7.634119][ T1] Code: b2 00 00 00 e8 67 52 f2 fc 5b 5d c3 cc cc cc cc e8 5b 52 f2 fc c6 05 51 cc ce 0a 01 90 48 c7 c7 a0 54 fe 8b e8 b7 d0 b4 fc 90 <0f> 0b 90 90 eb d9 e8 3b 52 f2 fc c6 05 2e cc ce 0a 01 90 48 c7 c7
[ 7.638094][ T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
[ 7.639044][ T1] RAX: 343580cc97689700 RBX: ffff8881401bf06c RCX: ffff8880166c8000
[ 7.640552][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 7.642175][ T1] RBP: 0000000000000004 R08: ffffffff8157ffe2 R09: fffffbfff1bf96e0
[ 7.643575][ T1] R10: dffffc0000000000 R11: fffffbfff1bf96e0 R12: ffffea000501cdc0
[ 7.645089][ T1] R13: ffffea000501cdc8 R14: 1ffffd4000a039b9 R15: 0000000000000000
[ 7.646458][ T1] FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
[ 7.647850][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7.648816][ T1] CR2: ffff88823ffff000 CR3: 000000000df32000 CR4: 00000000003506f0
[ 7.650069][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 7.651660][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 7.653255][ T1] Call Trace:
[ 7.653955][ T1] <TASK>
[ 7.655231][ T1] ? __warn+0x163/0x4e0
[ 7.656060][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.657004][ T1] ? report_bug+0x2b3/0x500
[ 7.657697][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.658659][ T1] ? handle_bug+0x3e/0x70
[ 7.659735][ T1] ? exc_invalid_op+0x1a/0x50
[ 7.660993][ T1] ? asm_exc_invalid_op+0x1a/0x20
[ 7.661819][ T1] ? __warn_printk+0x292/0x360
[ 7.662573][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.663589][ T1] ? refcount_warn_saturate+0xf9/0x1d0
[ 7.664642][ T1] __free_pages_ok+0xc54/0xd80
[ 7.665381][ T1] make_alloc_exact+0xa3/0xf0
[ 7.666771][ T1] vring_alloc_queue_split+0x20a/0x600
[ 7.667714][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
[ 7.668766][ T1] ? vp_find_vqs+0x4c/0x4e0
[ 7.669540][ T1] ? virtscsi_probe+0x3ea/0xf60
[ 7.670758][ T1] ? virtio_dev_probe+0x991/0xaf0
[ 7.671577][ T1] ? really_probe+0x2b8/0xad0
[ 7.672570][ T1] ? driver_probe_device+0x50/0x430
[ 7.673427][ T1] vring_create_virtqueue_split+0xc6/0x310
[ 7.674713][ T1] ? ret_from_fork+0x4b/0x80
[ 7.675577][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
[ 7.676513][ T1] vring_create_virtqueue+0xca/0x110
[ 7.677483][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.678536][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.679645][ T1] setup_vq+0xe9/0x2d0
[ 7.680389][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.681211][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.682323][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.683391][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.684728][ T1] vp_setup_vq+0xbf/0x330
[ 7.685412][ T1] ? __pfx_vp_config_changed+0x10/0x10
[ 7.686599][ T1] ? ioread16+0x2f/0x90
[ 7.687219][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.688543][ T1] vp_find_vqs_msix+0x8b2/0xc80
[ 7.689396][ T1] vp_find_vqs+0x4c/0x4e0
[ 7.690066][ T1] virtscsi_init+0x8db/0xd00
[ 7.690768][ T1] ? __pfx_virtscsi_init+0x10/0x10
[ 7.691800][ T1] ? __pfx_default_calc_sets+0x10/0x10
[ 7.692645][ T1] ? scsi_host_alloc+0xa57/0xea0
[ 7.693496][ T1] ? vp_get+0xfd/0x140
[ 7.694109][ T1] virtscsi_probe+0x3ea/0xf60
[ 7.695276][ T1] ? __pfx_virtscsi_probe+0x10/0x10
[ 7.696256][ T1] ? kernfs_add_one+0x156/0x8b0
[ 7.697276][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10
[ 7.698400][ T1] ? virtio_features_ok+0x10c/0x270
[ 7.699300][ T1] virtio_dev_probe+0x991/0xaf0
[ 7.700143][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 7.700985][ T1] really_probe+0x2b8/0xad0
[ 7.702196][ T1] __driver_probe_device+0x1a2/0x390
[ 7.703259][ T1] driver_probe_device+0x50/0x430
[ 7.704075][ T1] __driver_attach+0x45f/0x710
[ 7.704819][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.705601][ T1] bus_for_each_dev+0x239/0x2b0
[ 7.706514][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.707442][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 7.708680][ T1] ? do_raw_spin_unlock+0x13c/0x8b0
[ 7.710058][ T1] bus_add_driver+0x347/0x620
[ 7.711073][ T1] driver_register+0x23a/0x320
[ 7.712178][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.713450][ T1] virtio_scsi_init+0x65/0xe0
[ 7.714571][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.715692][ T1] do_one_initcall+0x248/0x880
[ 7.716533][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.717409][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.718599][ T1] ? lockdep_hardirqs_on_prepare+0x43d/0x780
[ 7.719639][ T1] ? __pfx_parse_args+0x10/0x10
[ 7.720523][ T1] ? do_initcalls+0x1c/0x80
[ 7.721261][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.722428][ T1] do_initcall_level+0x157/0x210
[ 7.723278][ T1] do_initcalls+0x3f/0x80
[ 7.723962][ T1] kernel_init_freeable+0x435/0x5d0
[ 7.725035][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 7.726103][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 7.727205][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.728033][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.729046][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.729731][ T1] kernel_init+0x1d/0x2b0
[ 7.730411][ T1] ret_from_fork+0x4b/0x80
[ 7.731117][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.731836][ T1] ret_from_fork_asm+0x1a/0x30
[ 7.732580][ T1] </TASK>
[ 7.733103][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 7.734198][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc1-syzkaller-00060-g889914b5c209 #0
[ 7.734971][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
[ 7.734971][ T1] Call Trace:
[ 7.734971][ T1] <TASK>
[ 7.734971][ T1] dump_stack_lvl+0x241/0x360
[ 7.734971][ T1] ? __pfx_dump_stack_lvl+0x10/0x10
[ 7.734971][ T1] ? __pfx__printk+0x10/0x10
[ 7.734971][ T1] ? _printk+0xd5/0x120
[ 7.734971][ T1] ? vscnprintf+0x5d/0x90
[ 7.734971][ T1] panic+0x349/0x860
[ 7.734971][ T1] ? __warn+0x172/0x4e0
[ 7.734971][ T1] ? __pfx_panic+0x10/0x10
[ 7.734971][ T1] ? show_trace_log_lvl+0x4e6/0x520
[ 7.734971][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 7.734971][ T1] __warn+0x346/0x4e0
[ 7.734971][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.734971][ T1] report_bug+0x2b3/0x500
[ 7.734971][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.734971][ T1] handle_bug+0x3e/0x70
[ 7.734971][ T1] exc_invalid_op+0x1a/0x50
[ 7.734971][ T1] asm_exc_invalid_op+0x1a/0x20
[ 7.734971][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[ 7.734971][ T1] Code: b2 00 00 00 e8 67 52 f2 fc 5b 5d c3 cc cc cc cc e8 5b 52 f2 fc c6 05 51 cc ce 0a 01 90 48 c7 c7 a0 54 fe 8b e8 b7 d0 b4 fc 90 <0f> 0b 90 90 eb d9 e8 3b 52 f2 fc c6 05 2e cc ce 0a 01 90 48 c7 c7
[ 7.734971][ T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
[ 7.734971][ T1] RAX: 343580cc97689700 RBX: ffff8881401bf06c RCX: ffff8880166c8000
[ 7.734971][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 7.734971][ T1] RBP: 0000000000000004 R08: ffffffff8157ffe2 R09: fffffbfff1bf96e0
[ 7.734971][ T1] R10: dffffc0000000000 R11: fffffbfff1bf96e0 R12: ffffea000501cdc0
[ 7.734971][ T1] R13: ffffea000501cdc8 R14: 1ffffd4000a039b9 R15: 0000000000000000
[ 7.734971][ T1] ? __warn_printk+0x292/0x360
[ 7.734971][ T1] ? refcount_warn_saturate+0xf9/0x1d0
[ 7.734971][ T1] __free_pages_ok+0xc54/0xd80
[ 7.734971][ T1] make_alloc_exact+0xa3/0xf0
[ 7.734971][ T1] vring_alloc_queue_split+0x20a/0x600
[ 7.734971][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
[ 7.734971][ T1] ? vp_find_vqs+0x4c/0x4e0
[ 7.734971][ T1] ? virtscsi_probe+0x3ea/0xf60
[ 7.734971][ T1] ? virtio_dev_probe+0x991/0xaf0
[ 7.734971][ T1] ? really_probe+0x2b8/0xad0
[ 7.734971][ T1] ? driver_probe_device+0x50/0x430
[ 7.734971][ T1] vring_create_virtqueue_split+0xc6/0x310
[ 7.734971][ T1] ? ret_from_fork+0x4b/0x80
[ 7.734971][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
[ 7.734971][ T1] vring_create_virtqueue+0xca/0x110
[ 7.734971][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.734971][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.734971][ T1] setup_vq+0xe9/0x2d0
[ 7.734971][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.734971][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.784590][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.784590][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.784590][ T1] vp_setup_vq+0xbf/0x330
[ 7.784590][ T1] ? __pfx_vp_config_changed+0x10/0x10
[ 7.784590][ T1] ? ioread16+0x2f/0x90
[ 7.784590][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.784590][ T1] vp_find_vqs_msix+0x8b2/0xc80
[ 7.784590][ T1] vp_find_vqs+0x4c/0x4e0
[ 7.784590][ T1] virtscsi_init+0x8db/0xd00
[ 7.784590][ T1] ? __pfx_virtscsi_init+0x10/0x10
[ 7.784590][ T1] ? __pfx_default_calc_sets+0x10/0x10
[ 7.784590][ T1] ? scsi_host_alloc+0xa57/0xea0
[ 7.784590][ T1] ? vp_get+0xfd/0x140
[ 7.784590][ T1] virtscsi_probe+0x3ea/0xf60
[ 7.784590][ T1] ? __pfx_virtscsi_probe+0x10/0x10
[ 7.784590][ T1] ? kernfs_add_one+0x156/0x8b0
[ 7.784590][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10
[ 7.784590][ T1] ? virtio_features_ok+0x10c/0x270
[ 7.784590][ T1] virtio_dev_probe+0x991/0xaf0
[ 7.784590][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 7.784590][ T1] really_probe+0x2b8/0xad0
[ 7.784590][ T1] __driver_probe_device+0x1a2/0x390
[ 7.784590][ T1] driver_probe_device+0x50/0x430
[ 7.784590][ T1] __driver_attach+0x45f/0x710
[ 7.784590][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.784590][ T1] bus_for_each_dev+0x239/0x2b0
[ 7.784590][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.784590][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 7.784590][ T1] ? do_raw_spin_unlock+0x13c/0x8b0
[ 7.784590][ T1] bus_add_driver+0x347/0x620
[ 7.784590][ T1] driver_register+0x23a/0x320
[ 7.784590][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.784590][ T1] virtio_scsi_init+0x65/0xe0
[ 7.784590][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.784590][ T1] do_one_initcall+0x248/0x880
[ 7.784590][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.784590][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.784590][ T1] ? lockdep_hardirqs_on_prepare+0x43d/0x780
[ 7.784590][ T1] ? __pfx_parse_args+0x10/0x10
[ 7.784590][ T1] ? do_initcalls+0x1c/0x80
[ 7.784590][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.784590][ T1] do_initcall_level+0x157/0x210
[ 7.784590][ T1] do_initcalls+0x3f/0x80
[ 7.784590][ T1] kernel_init_freeable+0x435/0x5d0
[ 7.784590][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 7.784590][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 7.784590][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.784590][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.784590][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.784590][ T1] kernel_init+0x1d/0x2b0
[ 7.784590][ T1] ret_from_fork+0x4b/0x80
[ 7.784590][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.784590][ T1] ret_from_fork_asm+0x1a/0x30
[ 7.834581][ T1] </TASK>
[ 7.834581][ T1] Kernel Offset: disabled
[ 7.834581][ T1] Rebooting in 86400 seconds..

syzkaller build log:
go env (err=<nil>)
GO111MODULE='auto'
GOARCH='amd64'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.21.4'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build686088701=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 610f2a54d
nothing to commit, working tree clean

tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=610f2a54d02f8cf4f2454c03bf679b602e6e59b6 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240503-155746'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=610f2a54d02f8cf4f2454c03bf679b602e6e59b6 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240503-155746'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=610f2a54d02f8cf4f2454c03bf679b602e6e59b6 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240503-155746'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
mkdir -p ./bin/linux_amd64
gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -std=c++11 -I. -Ivendor -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"610f2a54d02f8cf4f2454c03bf679b602e6e59b6\"

Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=1233c3ec980000

Tested on:

commit: 889914b5 f2fs: fix to cover read extent cache access w..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git wip
kernel config: https://syzkaller.appspot.com/x/.config?x=1ace29459a0a1915
dashboard link: https://syzkaller.appspot.com/bug?extid=74ebe2104433e9dc610d
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.

2024-05-31 01:39:48

by Chao Yu

[permalink] [raw]

Subject: Re: [f2fs-dev] [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent_cache

2024-05-31 01:58:13

by syzbot

[permalink] [raw]

Subject: Re: [syzbot] [f2fs?] KASAN: slab-use-after-free Read in sanity_check_extent_cache

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: [email protected]

Tested on:

commit: b022159f f2fs: fix to truncate preallocated blocks in ..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git wip
console output: https://syzkaller.appspot.com/x/log.txt?x=10811664980000
kernel config: https://syzkaller.appspot.com/x/.config?x=6be91306a8917025
dashboard link: https://syzkaller.appspot.com/bug?extid=74ebe2104433e9dc610d
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.