#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git wip
On 2023/11/8 23:01, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 90b0c2b2edd1 Merge tag 'pinctrl-v6.7-1' of git://git.kerne..
> git tree: upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=10222eeb680000
> kernel config: https://syzkaller.appspot.com/x/.config?x=93ac5233c138249e
> dashboard link: https://syzkaller.appspot.com/bug?extid=31e4659a3fe953aec2f4
> 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=13a2847b680000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1579d0df680000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/10c213d23300/disk-90b0c2b2.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/0c55e6e441c1/vmlinux-90b0c2b2.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/c7f0436ea052/bzImage-90b0c2b2.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/dbf260983b94/mount_0.gz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: [email protected]
>
> ------------[ cut here ]------------
> kernel BUG at fs/f2fs/inode.c:933!
> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> CPU: 1 PID: 5054 Comm: syz-executor410 Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
> RIP: 0010:f2fs_evict_inode+0x1576/0x1590 fs/f2fs/inode.c:933
> Code: fd 31 ff 89 de e8 5a 4f bf fd 40 84 ed 75 29 e8 c0 4c bf fd 4c 8b 74 24 08 e9 c9 eb ff ff e8 b1 4c bf fd 0f 0b e8 aa 4c bf fd <0f> 0b e8 a3 4c bf fd 0f 0b e9 f6 fe ff ff e8 97 4c bf fd e8 72 e7
> RSP: 0018:ffffc900039df918 EFLAGS: 00010293
> RAX: ffffffff83cf9f56 RBX: 0000000000000002 RCX: ffff888014b30000
> RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
> RBP: 0000000000000000 R08: ffffffff83cf984a R09: 1ffff1100ed0061d
> R10: dffffc0000000000 R11: ffffed100ed0061e R12: 1ffff1100ed0058f
> R13: ffff888076802c38 R14: ffff8880768030e8 R15: dffffc0000000000
> FS: 00005555556ae3c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007ffdbe23ce18 CR3: 00000000727e8000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <TASK>
> evict+0x2a4/0x620 fs/inode.c:664
> dispose_list fs/inode.c:697 [inline]
> evict_inodes+0x5f8/0x690 fs/inode.c:747
> generic_shutdown_super+0x9d/0x2c0 fs/super.c:675
> kill_block_super+0x44/0x90 fs/super.c:1667
> kill_f2fs_super+0x303/0x3b0 fs/f2fs/super.c:4894
> deactivate_locked_super+0xc1/0x130 fs/super.c:484
> cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
> task_work_run+0x24a/0x300 kernel/task_work.c:180
> ptrace_notify+0x2cd/0x380 kernel/signal.c:2399
> ptrace_report_syscall include/linux/ptrace.h:411 [inline]
> ptrace_report_syscall_exit include/linux/ptrace.h:473 [inline]
> syscall_exit_work kernel/entry/common.c:251 [inline]
> syscall_exit_to_user_mode_prepare kernel/entry/common.c:278 [inline]
> __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
> syscall_exit_to_user_mode+0x15c/0x280 kernel/entry/common.c:296
> do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88
> entry_SYSCALL_64_after_hwframe+0x63/0x6b
> RIP: 0033:0x7fa1a5e8ee77
> Code: 08 00 48 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 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
> RSP: 002b:00007ffdbe23d5c8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
> RAX: 0000000000000000 RBX: 0000000000021a97 RCX: 00007fa1a5e8ee77
> RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffdbe23d680
> RBP: 00007ffdbe23d680 R08: 0000000000000000 R09: 0000000000000000
> R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffdbe23e740
> R13: 00005555556af700 R14: 431bde82d7b634db R15: 00007ffdbe23e6e4
> </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:f2fs_evict_inode+0x1576/0x1590 fs/f2fs/inode.c:933
> Code: fd 31 ff 89 de e8 5a 4f bf fd 40 84 ed 75 29 e8 c0 4c bf fd 4c 8b 74 24 08 e9 c9 eb ff ff e8 b1 4c bf fd 0f 0b e8 aa 4c bf fd <0f> 0b e8 a3 4c bf fd 0f 0b e9 f6 fe ff ff e8 97 4c bf fd e8 72 e7
> RSP: 0018:ffffc900039df918 EFLAGS: 00010293
> RAX: ffffffff83cf9f56 RBX: 0000000000000002 RCX: ffff888014b30000
> RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
> RBP: 0000000000000000 R08: ffffffff83cf984a R09: 1ffff1100ed0061d
> R10: dffffc0000000000 R11: ffffed100ed0061e R12: 1ffff1100ed0058f
> R13: ffff888076802c38 R14: ffff8880768030e8 R15: dffffc0000000000
> FS: 00005555556ae3c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007ffdbe23ce18 CR3: 00000000727e8000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>
>
> ---
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>
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Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: [email protected]
Tested on:
commit: 4d419837 f2fs: fix to don't dirty inode for readonly f..
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=17a597d6980000
kernel config: https://syzkaller.appspot.com/x/.config?x=eab577c7808ea52b
dashboard link: https://syzkaller.appspot.com/bug?extid=31e4659a3fe953aec2f4
compiler: gcc (Debian 12.2.0-14) 12.2.0, 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.