Hello,
syzbot found the following issue on:
HEAD commit: 614cb2751d31 Merge tag 'trace-v5.14-rc6' of git://git.kern..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=128cfb31300000
kernel config: https://syzkaller.appspot.com/x/.config?x=f61012d0b1cd846f
dashboard link: https://syzkaller.appspot.com/bug?extid=e2efa3efc15a1c9e95c3
compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.1
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=122a0161300000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
EXT4-fs error (device loop1): ext4_map_blocks:718: inode #17: block 424: comm syz-executor.1: lblock 296 mapped to illegal pblock 424 (length 1)
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4.h:3295!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 10426 Comm: syz-executor.1 Not tainted 5.14.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ext4_get_group_info+0x34d/0x350 fs/ext4/ext4.h:3295
Code: 5c ff 8b 74 24 04 48 c7 c7 40 77 88 8c 4c 89 f2 e8 08 9f 05 02 43 80 3c 2c 00 0f 85 6d fd ff ff e9 70 fd ff ff e8 a3 46 5c ff <0f> 0b 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 41 89 d5 89 f5
RSP: 0018:ffffc9000c49f320 EFLAGS: 00010293
RAX: ffffffff8223f12d RBX: 00000000fffff95a RCX: ffff88802d923880
RDX: 0000000000000000 RSI: 00000000fffff95a RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff8223ee48 R09: ffffed1008f9ac2c
R10: ffffed1008f9ac2c R11: 0000000000000000 R12: 1ffff110073d74cf
R13: dffffc0000000000 R14: ffff8880328dc000 R15: ffff888039eba678
FS: 00007fe3035a4700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002112848 CR3: 0000000033f2d000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ext4_mb_load_buddy_gfp+0xc7/0x1370 fs/ext4/mballoc.c:1490
ext4_discard_preallocations+0x811/0x16a0 fs/ext4/mballoc.c:4940
ext4_truncate+0xa1a/0xec0 fs/ext4/inode.c:4259
ext4_truncate_failed_write fs/ext4/truncate.h:20 [inline]
ext4_write_begin+0xa7b/0x1350 fs/ext4/inode.c:1234
ext4_da_write_begin+0x384/0x10c0 fs/ext4/inode.c:2960
generic_perform_write+0x262/0x580 mm/filemap.c:3656
ext4_buffered_write_iter+0x41c/0x590 fs/ext4/file.c:269
ext4_file_write_iter+0x8f7/0x1b90 fs/ext4/file.c:519
call_write_iter include/linux/fs.h:2114 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0xa39/0xc90 fs/read_write.c:605
ksys_write+0x171/0x2a0 fs/read_write.c:658
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe3035a4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 000000000d4ba0ff RSI: 00000000200009c0 RDI: 0000000000000007
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd1a1dd7ef R14: 00007fe3035a4300 R15: 0000000000022000
Modules linked in:
---[ end trace 6608a809acf19a79 ]---
RIP: 0010:ext4_get_group_info+0x34d/0x350 fs/ext4/ext4.h:3295
Code: 5c ff 8b 74 24 04 48 c7 c7 40 77 88 8c 4c 89 f2 e8 08 9f 05 02 43 80 3c 2c 00 0f 85 6d fd ff ff e9 70 fd ff ff e8 a3 46 5c ff <0f> 0b 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 41 89 d5 89 f5
RSP: 0018:ffffc9000c49f320 EFLAGS: 00010293
RAX: ffffffff8223f12d RBX: 00000000fffff95a RCX: ffff88802d923880
RDX: 0000000000000000 RSI: 00000000fffff95a RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff8223ee48 R09: ffffed1008f9ac2c
R10: ffffed1008f9ac2c R11: 0000000000000000 R12: 1ffff110073d74cf
R13: dffffc0000000000 R14: ffff8880328dc000 R15: ffff888039eba678
FS: 00007fe3035a4700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000033f2d000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 5c pop %rsp
1: ff 8b 74 24 04 48 decl 0x48042474(%rbx)
7: c7 c7 40 77 88 8c mov $0x8c887740,%edi
d: 4c 89 f2 mov %r14,%rdx
10: e8 08 9f 05 02 callq 0x2059f1d
15: 43 80 3c 2c 00 cmpb $0x0,(%r12,%r13,1)
1a: 0f 85 6d fd ff ff jne 0xfffffd8d
20: e9 70 fd ff ff jmpq 0xfffffd95
25: e8 a3 46 5c ff callq 0xff5c46cd
2a: 0f 0b ud2 <-- trapping instruction
2c: 90 nop
2d: 55 push %rbp
2e: 41 57 push %r15
30: 41 56 push %r14
32: 41 55 push %r13
34: 41 54 push %r12
36: 53 push %rbx
37: 48 83 ec 20 sub $0x20,%rsp
3b: 41 89 d5 mov %edx,%r13d
3e: 89 f5 mov %esi,%ebp
---
This report is generated by a bot. It may contain errors.
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syzbot can test patches for this issue, for details see:
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syzbot has found a reproducer for the following issue on:
HEAD commit: 200e340f2196 Merge tag 'pull-work.dcache' of git://git.ker..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=15a655b6080000
kernel config: https://syzkaller.appspot.com/x/.config?x=a3f4d6985d3164cd
dashboard link: https://syzkaller.appspot.com/bug?extid=e2efa3efc15a1c9e95c3
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13b248e1080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11ba3e3e080000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
EXT4-fs (loop0): ext4_check_descriptors: Checksum for group 0 failed (14603!=0)
EXT4-fs (loop0): orphan cleanup on readonly fs
EXT4-fs error (device loop0): ext4_mb_clear_bb:5962: comm syz-executor137: Freeing blocks in system zone - Block = 16, count = 16
EXT4-fs (loop0): Remounting filesystem read-only
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4.h:3319!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3607 Comm: syz-executor137 Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:ext4_get_group_info+0x36e/0x3d0 fs/ext4/ext4.h:3319
Code: ff 48 c7 c2 a0 b5 e2 89 be c3 02 00 00 48 c7 c7 00 b6 e2 89 c6 05 39 e3 89 0b 01 e8 fc 1d 16 07 e9 d9 fd ff ff e8 22 af 5d ff <0f> 0b e8 9b 76 aa ff e9 ea fc ff ff e8 91 76 aa ff e9 24 fd ff ff
RSP: 0018:ffffc90002fcf210 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: ffff888024b99d80 RSI: ffffffff821d2a9e RDI: 0000000000000004
RBP: ffff888021e86000 R08: 0000000000000004 R09: 0000000000000001
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff888021ee2000
R13: ffff888021ee2678 R14: 0000000000000001 R15: dffffc0000000000
FS: 00005555570a1300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005ded08 CR3: 0000000025559000 CR4: 0000000000350ee0
Call Trace:
<TASK>
ext4_mb_clear_bb fs/ext4/mballoc.c:5935 [inline]
ext4_free_blocks+0x4a2/0x2060 fs/ext4/mballoc.c:6185
ext4_clear_blocks+0x329/0x430 fs/ext4/indirect.c:880
ext4_free_data+0x1a3/0x3e0 fs/ext4/indirect.c:954
ext4_ind_truncate+0x6a2/0x950 fs/ext4/indirect.c:1146
ext4_truncate+0x696/0x1440 fs/ext4/inode.c:4244
ext4_evict_inode+0xa5f/0x1970 fs/ext4/inode.c:284
evict+0x2ed/0x6b0 fs/inode.c:664
iput_final fs/inode.c:1744 [inline]
iput.part.0+0x562/0x820 fs/inode.c:1770
iput+0x58/0x70 fs/inode.c:1760
ext4_quota_enable fs/ext4/super.c:6781 [inline]
ext4_enable_quotas+0x5c4/0xb70 fs/ext4/super.c:6804
ext4_orphan_cleanup+0xde1/0x10f0 fs/ext4/orphan.c:432
__ext4_fill_super fs/ext4/super.c:5368 [inline]
ext4_fill_super+0xac9a/0xe830 fs/ext4/super.c:5507
get_tree_bdev+0x440/0x760 fs/super.c:1292
vfs_get_tree+0x89/0x2f0 fs/super.c:1497
do_new_mount fs/namespace.c:3040 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa6cfe974da
Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc803cf6f8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc803cf750 RCX: 00007fa6cfe974da
RDX: 0000000020000000 RSI: 0000000020000040 RDI: 00007ffc803cf710
RBP: 00007ffc803cf710 R08: 00007ffc803cf750 R09: 0000000800000015
R10: 0000000000000081 R11: 0000000000000206 R12: 0000000000000004
R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000010
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_get_group_info+0x36e/0x3d0 fs/ext4/ext4.h:3319
Code: ff 48 c7 c2 a0 b5 e2 89 be c3 02 00 00 48 c7 c7 00 b6 e2 89 c6 05 39 e3 89 0b 01 e8 fc 1d 16 07 e9 d9 fd ff ff e8 22 af 5d ff <0f> 0b e8 9b 76 aa ff e9 ea fc ff ff e8 91 76 aa ff e9 24 fd ff ff
RSP: 0018:ffffc90002fcf210 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: ffff888024b99d80 RSI: ffffffff821d2a9e RDI: 0000000000000004
RBP: ffff888021e86000 R08: 0000000000000004 R09: 0000000000000001
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff888021ee2000
R13: ffff888021ee2678 R14: 0000000000000001 R15: dffffc0000000000
FS: 00005555570a1300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc803d0000 CR3: 0000000025559000 CR4: 0000000000350ef0