Message-ID: <10d4a49b-c596-418e-969c-0830d678de87@kernel.org>
Date: Tue, 3 Sep 2024 22:29:25 +0800
From: Chao Yu <chao@...nel.org>
To: syzbot <syzbot+ebea2790904673d7c618@...kaller.appspotmail.com>,
 jaegeuk@...nel.org, linux-f2fs-devel@...ts.sourceforge.net,
 linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [f2fs?] kernel BUG in f2fs_evict_inode (3)

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

On 2024/8/22 23:38, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    872cf28b8df9 Merge tag 'platform-drivers-x86-v6.11-4' of g..
> git tree:       upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=13ece38d980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=4fc2afd52fd008bb
> dashboard link: https://syzkaller.appspot.com/bug?extid=ebea2790904673d7c618
> 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=1344680b980000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1034880b980000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/c63409516c62/disk-872cf28b.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/79b2b8c52d3a/vmlinux-872cf28b.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/27cb9df9c339/bzImage-872cf28b.xz
> mounted in repro #1: https://storage.googleapis.com/syzbot-assets/1f04d7ef7499/mount_0.gz
> mounted in repro #2: https://storage.googleapis.com/syzbot-assets/831601ee93df/mount_5.gz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+ebea2790904673d7c618@...kaller.appspotmail.com
> 
> ------------[ cut here ]------------
> kernel BUG at fs/f2fs/inode.c:896!
> Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
> CPU: 1 UID: 0 PID: 5217 Comm: syz-executor605 Not tainted 6.11.0-rc4-syzkaller-00033-g872cf28b8df9 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
> RIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896
> Code: 6e 9b ab fd 31 ff 89 de e8 65 9b ab fd 40 84 ed 75 28 e8 5b 98 ab fd e9 3c ec ff ff e8 51 98 ab fd 90 0f 0b e8 49 98 ab fd 90 <0f> 0b e8 41 98 ab fd 90 0f 0b 90 e9 fc fe ff ff e8 33 98 ab fd e8
> RSP: 0018:ffffc90003497808 EFLAGS: 00010293
> RAX: ffffffff83e7f267 RBX: 0000000000000002 RCX: ffff88801a3e8000
> RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
> RBP: 0000000000000000 R08: ffffffff83e7ec50 R09: 1ffff1100efe9611
> R10: dffffc0000000000 R11: ffffed100efe9612 R12: ffff88807a834000
> R13: ffff888077f4b088 R14: ffff888077f4abe8 R15: dffffc0000000000
> FS:  000055556d6353c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f376cbf9000 CR3: 00000000786a0000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>   <TASK>
>   evict+0x532/0x950 fs/inode.c:704
>   dispose_list fs/inode.c:747 [inline]
>   evict_inodes+0x5f9/0x690 fs/inode.c:797
>   generic_shutdown_super+0x9d/0x2d0 fs/super.c:627
>   kill_block_super+0x44/0x90 fs/super.c:1696
>   kill_f2fs_super+0x344/0x690 fs/f2fs/super.c:4898
>   deactivate_locked_super+0xc4/0x130 fs/super.c:473
>   cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
>   task_work_run+0x24f/0x310 kernel/task_work.c:228
>   ptrace_notify+0x2d2/0x380 kernel/signal.c:2402
>   ptrace_report_syscall include/linux/ptrace.h:415 [inline]
>   ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]
>   syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173
>   syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
>   __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
>   syscall_exit_to_user_mode+0x279/0x370 kernel/entry/common.c:218
>   do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
>   entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7f37740a00a7
> 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:00007ffc120a25e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
> RAX: 0000000000000000 RBX: 0000000000015fbb RCX: 00007f37740a00a7
> RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc120a26a0
> RBP: 00007ffc120a26a0 R08: 0000000000000000 R09: 0000000000000000
> R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffc120a3750
> R13: 000055556d636700 R14: 431bde82d7b634db R15: 00007ffc120a36f4
>   </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896
> Code: 6e 9b ab fd 31 ff 89 de e8 65 9b ab fd 40 84 ed 75 28 e8 5b 98 ab fd e9 3c ec ff ff e8 51 98 ab fd 90 0f 0b e8 49 98 ab fd 90 <0f> 0b e8 41 98 ab fd 90 0f 0b 90 e9 fc fe ff ff e8 33 98 ab fd e8
> RSP: 0018:ffffc90003497808 EFLAGS: 00010293
> RAX: ffffffff83e7f267 RBX: 0000000000000002 RCX: ffff88801a3e8000
> RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
> RBP: 0000000000000000 R08: ffffffff83e7ec50 R09: 1ffff1100efe9611
> R10: dffffc0000000000 R11: ffffed100efe9612 R12: ffff88807a834000
> R13: ffff888077f4b088 R14: ffff888077f4abe8 R15: dffffc0000000000
> FS:  000055556d6353c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f376bda6000 CR3: 00000000786a0000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> 
> 
> ---
> 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.

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