syzbot


WARNING in vfs_removexattr

Status: upstream: reported on 2024/08/03 02:57
Reported-by: syzbot+cc55cbd6cfaeb5ef0689@syzkaller.appspotmail.com
First crash: 73d, last: 47d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in vfs_removexattr 1 152d 152d 0/3 auto-obsoleted due to no activity on 2024/08/24 01:07
upstream WARNING in vfs_removexattr (2) fs 2 34d 56d 0/28 moderation: reported on 2024/08/19 22:16
upstream WARNING in vfs_removexattr fs 2 174d 174d 0/28 auto-obsoleted due to no activity on 2024/07/22 12:52

Sample crash report:
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff8880510f65a8, owner = 0x0, curr 0xffff888078749dc0, list empty
WARNING: CPU: 1 PID: 9807 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 9807 at kernel/locking/rwsem.c:1372 up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 9807 Comm: syz.3.1587 Not tainted 6.1.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__up_write kernel/locking/rwsem.c:1371 [inline]
RIP: 0010:up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Code: 48 c7 c7 00 f6 0b 8b 48 c7 c6 40 f8 0b 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 1f ce e8 ff 48 83 c4 08 <0f> 0b e9 71 fd ff ff 48 c7 c1 68 f9 99 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900031dfb20 EFLAGS: 00010292
RAX: 7f82ccfa4e194000 RBX: ffffffff8b0bf6e0 RCX: 0000000000040000
RDX: ffffc90018974000 RSI: 000000000000de53 RDI: 000000000000de54
RBP: ffffc900031dfbf0 R08: ffffffff8152940e R09: fffff5200063bec5
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880510f65a8 R14: 1ffff9200063bf6c R15: dffffc0000000000
FS:  00007fc7d9a846c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f309c32d440 CR3: 000000004fdb8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:763 [inline]
 vfs_removexattr+0x10a/0x2a0 fs/xattr.c:538
 removexattr fs/xattr.c:878 [inline]
 path_removexattr+0x22a/0x320 fs/xattr.c:892
 __do_sys_removexattr fs/xattr.c:906 [inline]
 __se_sys_removexattr fs/xattr.c:903 [inline]
 __x64_sys_removexattr+0x5c/0x70 fs/xattr.c:903
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc7d8d779f9
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:00007fc7d9a84038 EFLAGS: 00000246 ORIG_RAX: 00000000000000c5
RAX: ffffffffffffffda RBX: 00007fc7d8f06058 RCX: 00007fc7d8d779f9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000020000180
RBP: 00007fc7d8de58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fc7d8f06058 R15: 00007ffd73445538
 </TASK>

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/08/08 22:14 linux-6.1.y 48d525b0e463 61405512 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in vfs_removexattr
2024/08/08 22:14 linux-6.1.y 48d525b0e463 61405512 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in vfs_removexattr
2024/08/03 02:56 linux-6.1.y c1cec4dad96b 1786a2a8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in vfs_removexattr
2024/08/28 14:45 linux-6.1.y ee5e09825b81 ef3de9e8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in vfs_removexattr
2024/08/14 06:06 linux-6.1.y 36790ef5e00b bde81f6f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in vfs_removexattr
2024/08/10 06:35 linux-6.1.y 48d525b0e463 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in vfs_removexattr
2024/08/09 17:20 linux-6.1.y 48d525b0e463 a83d9288 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in vfs_removexattr
* Struck through repros no longer work on HEAD.