* Re: [syzbot] [mm?] WARNING in shmem_evict_inode
[not found] <00000000000016552c05f1d7e734@google.com>
@ 2023-05-05 10:43 ` syzbot
2023-05-05 16:51 ` syzbot
1 sibling, 0 replies; 3+ messages in thread
From: syzbot @ 2023-05-05 10:43 UTC (permalink / raw)
To: akpm, hughd, linux-kernel, linux-mm, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: 3c4aa4434377 Merge tag 'ceph-for-6.4-rc1' of https://githu..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12b6d904280000
kernel config: https://syzkaller.appspot.com/x/.config?x=c1d541e02d3faec
dashboard link: https://syzkaller.appspot.com/bug?extid=3d4aa0d3e784b29b1520
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=14d1973c280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8f7290c9ee9a/disk-3c4aa443.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/750ee3ca09db/vmlinux-3c4aa443.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5839788c2cab/bzImage-3c4aa443.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3d4aa0d3e784b29b1520@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6362 at mm/shmem.c:1186 shmem_evict_inode+0x873/0xb60 mm/shmem.c:1186
Modules linked in:
CPU: 0 PID: 6362 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-13091-g3c4aa4434377 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:shmem_evict_inode+0x873/0xb60 mm/shmem.c:1186
Code: 89 fe e8 70 1c ca ff 45 85 ff 75 ab e8 46 20 ca ff 48 8b 74 24 18 48 8b 7c 24 20 e8 a7 de a7 ff e9 fc fd ff ff e8 2d 20 ca ff <0f> 0b e9 a0 f8 ff ff e8 21 20 ca ff 4c 89 ea 48 b8 00 00 00 00 00
RSP: 0018:ffffc9000b147858 EFLAGS: 00010293
RAX: 0000000000000000 RBX: fffffffffffff840 RCX: 0000000000000000
RDX: ffff88807c94e040 RSI: ffffffff81b95ec3 RDI: 0000000000000007
RBP: ffffc9000b147950 R08: 0000000000000007 R09: 0000000000000000
R10: fffffffffffff840 R11: 0000000000000000 R12: ffff888076f85450
R13: ffff888076f854a0 R14: ffff888076f85380 R15: ffff888076f85390
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7087f5e108 CR3: 000000007c6b6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
evict+0x2ed/0x6b0 fs/inode.c:665
iput_final fs/inode.c:1747 [inline]
iput.part.0+0x50a/0x740 fs/inode.c:1773
iput+0x5c/0x80 fs/inode.c:1763
dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401
__dentry_kill+0x3c0/0x640 fs/dcache.c:607
dentry_kill fs/dcache.c:733 [inline]
dput+0x865/0xe10 fs/dcache.c:913
__fput+0x3cc/0xa90 fs/file_table.c:329
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xad3/0x2960 kernel/exit.c:871
do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
get_signal+0x2315/0x25b0 kernel/signal.c:2874
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efe7028c169
Code: Unable to access opcode bytes at 0x7efe7028c13f.
RSP: 002b:00007efe70fe2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000116000 RBX: 00007efe703abf80 RCX: 00007efe7028c169
RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007efe702e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc607e699f R14: 00007efe70fe2300 R15: 0000000000022000
</TASK>
---
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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