syzbot


kernel BUG in __fscache_relinquish_cookie (2)

Status: auto-obsoleted due to no activity on 2024/03/30 07:46
Subsystems: netfs
[Documentation on labels]
Reported-by: syzbot+ccef0a87d907980eed03@syzkaller.appspotmail.com
First crash: 74d, last: 74d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [netfs?] kernel BUG in __fscache_relinquish_cookie (2) 0 (1) 2024/02/03 07:57
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in __fscache_relinquish_cookie fs 1 694d 690d 0/26 auto-obsoleted due to no activity on 2022/09/17 03:29

Sample crash report:
netfs: 
netfs: Assertion failed
netfs: ffffffffadacafae == 0 is false
------------[ cut here ]------------
kernel BUG at fs/netfs/fscache_cookie.c:985!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 22343 Comm: syz-executor.0 Not tainted 6.8.0-rc1-next-20240129-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__fscache_relinquish_cookie+0x4e8/0x620 fs/netfs/fscache_cookie.c:985
Code: e8 83 e0 07 83 c0 03 38 d0 7c 0c 84 d2 74 08 48 89 ef e8 cb d4 b8 ff 48 63 73 04 31 d2 48 c7 c7 c0 a2 22 8b e8 b9 29 40 ff 90 <0f> 0b e8 c1 51 5e ff 48 c7 c7 40 a2 22 8b e8 a5 29 40 ff 48 c7 c7
RSP: 0018:ffffc90014417b00 EFLAGS: 00010282
RAX: 0000000000000025 RBX: ffff88823bd40ee8 RCX: ffffc9000cded000
RDX: 0000000000000000 RSI: ffffffff816eb7e6 RDI: 0000000000000005
RBP: ffff88823bd40eec R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: fffffffffffc94f8 R12: ffff88823bd40fd8
R13: 00000000adacafae R14: 000000000003c0cc R15: ffff8880750f29c0
FS:  00007f4f507ef6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f41889747a0 CR3: 000000007c79e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fscache_relinquish_cookie include/linux/fscache.h:308 [inline]
 v9fs_evict_inode+0x102/0x150 fs/9p/vfs_inode.c:356
 evict+0x2ed/0x6c0 fs/inode.c:666
 iput_final fs/inode.c:1740 [inline]
 iput.part.0+0x573/0x7c0 fs/inode.c:1766
 iput+0x5c/0x80 fs/inode.c:1756
 v9fs_fid_iget_dotl+0x1b4/0x260 fs/9p/vfs_inode_dotl.c:96
 v9fs_get_inode_from_fid fs/9p/v9fs.h:230 [inline]
 v9fs_mount+0x515/0xa90 fs/9p/vfs_super.c:142
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1784
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x14e6/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __x64_sys_mount+0x297/0x320 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f4f4fa7cda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4f507ef0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4f4fbabf80 RCX: 00007f4f4fa7cda9
RDX: 0000000020000140 RSI: 0000000020000400 RDI: 0000000000000000
RBP: 00007f4f4fac947a R08: 00000000200007c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4f4fbabf80 R15: 00007ffd6430a4a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__fscache_relinquish_cookie+0x4e8/0x620 fs/netfs/fscache_cookie.c:985
Code: e8 83 e0 07 83 c0 03 38 d0 7c 0c 84 d2 74 08 48 89 ef e8 cb d4 b8 ff 48 63 73 04 31 d2 48 c7 c7 c0 a2 22 8b e8 b9 29 40 ff 90 <0f> 0b e8 c1 51 5e ff 48 c7 c7 40 a2 22 8b e8 a5 29 40 ff 48 c7 c7
RSP: 0018:ffffc90014417b00 EFLAGS: 00010282
RAX: 0000000000000025 RBX: ffff88823bd40ee8 RCX: ffffc9000cded000
RDX: 0000000000000000 RSI: ffffffff816eb7e6 RDI: 0000000000000005
RBP: ffff88823bd40eec R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: fffffffffffc94f8 R12: ffff88823bd40fd8
R13: 00000000adacafae R14: 000000000003c0cc R15: ffff8880750f29c0
FS:  00007f4f507ef6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efe021a8000 CR3: 000000007c79e000 CR4: 00000000003506f0
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
2024/01/30 07:46 linux-next 596764183be8 991a98f4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in __fscache_relinquish_cookie
* Struck through repros no longer work on HEAD.