syzbot


WARNING in vfs_removexattr

Status: moderation: reported on 2024/04/23 22:04
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+aaf2542624ad17fbc2f0@syzkaller.appspotmail.com
First crash: 34d, last: 30d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in vfs_removexattr 1 8d00h 8d00h 0/3 upstream: reported on 2024/05/16 01:07

Sample crash report:
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88804096a930, owner = 0x0, curr 0xffff88802398bc00, list empty
WARNING: CPU: 1 PID: 26437 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 1 PID: 26437 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 1 PID: 26437 Comm: syz-executor.1 Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Code: c7 c7 20 ac ca 8b 48 c7 c6 a0 ae ca 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 c3 b6 e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 f0 e7 a7 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc9000ee77a60 EFLAGS: 00010296
RAX: 4ee0c287b3e23200 RBX: ffffffff8bcaad00 RCX: 0000000000040000
RDX: ffffc9000beac000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000ee77b30 R08: ffffffff81587f92 R09: fffffbfff1c39b48
R10: dffffc0000000000 R11: fffffbfff1c39b48 R12: 0000000000000000
R13: ffff88804096a930 R14: 1ffff92001dcef54 R15: dffffc0000000000
FS:  00007f11080256c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e823000 CR3: 000000005314e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:800 [inline]
 vfs_removexattr+0x10e/0x2b0 fs/xattr.c:577
 removexattr+0x147/0x1c0 fs/xattr.c:917
 path_removexattr+0x1a9/0x290 fs/xattr.c:931
 __do_sys_removexattr fs/xattr.c:945 [inline]
 __se_sys_removexattr fs/xattr.c:942 [inline]
 __x64_sys_removexattr+0x60/0x70 fs/xattr.c:942
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f110727dea9
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:00007f11080250c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000c5
RAX: ffffffffffffffda RBX: 00007f11073ac050 RCX: 00007f110727dea9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000020000040
RBP: 00007f11072ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f11073ac050 R15: 00007ffef597b2d8
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/19 21:58 upstream 3cdb45594619 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in vfs_removexattr
2024/04/23 12:51 linux-next 7b4f2bc91c15 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in vfs_removexattr
* Struck through repros no longer work on HEAD.