syzbot


BUG: corrupted list in vfs_setxattr

Status: moderation: reported on 2024/10/01 08:10
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+a1b8fd5f114594905a85@syzkaller.appspotmail.com
First crash: 8d11h, last: 8d11h

Sample crash report:
loop0: detected capacity change from 0 to 32768
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
list_del corruption. prev->next should be ffffc90002d7fa00, but was ffff88804c058e90. (prev=ffff88804c058e90)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:64!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5115 Comm: syz.0.0 Not tainted 6.11.0-syzkaller-11558-g075dbe9f6e3c #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__list_del_entry_valid_or_report+0x11b/0x140 lib/list_debug.c:62
Code: ff 06 90 0f 0b 48 c7 c7 a0 f8 60 8c 4c 89 fe e8 2b eb ff 06 90 0f 0b 48 c7 c7 00 f9 60 8c 4c 89 fe 48 89 d9 e8 16 eb ff 06 90 <0f> 0b 48 c7 c7 80 f9 60 8c 4c 89 fe 4c 89 f1 e8 01 eb ff 06 90 0f
RSP: 0018:ffffc90002d7f878 EFLAGS: 00010046
RAX: 000000000000006d RBX: ffff88804c058e90 RCX: 8971b1f9ab668400
RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000
RBP: ffffc90002d7fad0 R08: ffffffff81746bbc R09: 1ffff920005afeac
R10: dffffc0000000000 R11: fffff520005afead R12: dffffc0000000000
R13: ffffc90002d7fa00 R14: ffff88804c058e90 R15: ffffc90002d7fa00
FS:  00007f0897d726c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff32568f98 CR3: 000000003aee2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 rwsem_try_write_lock kernel/locking/rwsem.c:663 [inline]
 rwsem_down_write_slowpath+0xf9b/0x13b0 kernel/locking/rwsem.c:1152
 __down_write_common kernel/locking/rwsem.c:1306 [inline]
 __down_write kernel/locking/rwsem.c:1315 [inline]
 down_write+0x1d7/0x220 kernel/locking/rwsem.c:1580
 inode_lock include/linux/fs.h:815 [inline]
 vfs_setxattr+0x1e1/0x430 fs/xattr.c:320
 do_setxattr fs/xattr.c:629 [inline]
 path_setxattr+0x37e/0x4d0 fs/xattr.c:658
 __do_sys_setxattr fs/xattr.c:676 [inline]
 __se_sys_setxattr fs/xattr.c:672 [inline]
 __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:672
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0896f7df39
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0897d72038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f0897136058 RCX: 00007f0896f7df39
RDX: 0000000020000280 RSI: 0000000020000240 RDI: 0000000020000200
RBP: 00007f0896ff0216 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0897136058 R15: 00007fff32569c08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x11b/0x140 lib/list_debug.c:62
Code: ff 06 90 0f 0b 48 c7 c7 a0 f8 60 8c 4c 89 fe e8 2b eb ff 06 90 0f 0b 48 c7 c7 00 f9 60 8c 4c 89 fe 48 89 d9 e8 16 eb ff 06 90 <0f> 0b 48 c7 c7 80 f9 60 8c 4c 89 fe 4c 89 f1 e8 01 eb ff 06 90 0f
RSP: 0018:ffffc90002d7f878 EFLAGS: 00010046
RAX: 000000000000006d RBX: ffff88804c058e90 RCX: 8971b1f9ab668400
RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000
RBP: ffffc90002d7fad0 R08: ffffffff81746bbc R09: 1ffff920005afeac
R10: dffffc0000000000 R11: fffff520005afead R12: dffffc0000000000
R13: ffffc90002d7fa00 R14: ffff88804c058e90 R15: ffffc90002d7fa00
FS:  00007f0897d726c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff32568f98 CR3: 000000003aee2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/27 06:46 upstream 075dbe9f6e3c 9314348a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: corrupted list in vfs_setxattr
* Struck through repros no longer work on HEAD.