syzbot


WARNING in path_mount

Status: moderation: reported on 2024/05/27 20:59
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+05e6e2588f08f1e74824@syzkaller.appspotmail.com
First crash: 29d, last: 29d

Sample crash report:
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888032eecac8, owner = 0x0, curr 0xffff88802ae6c880, list empty
WARNING: CPU: 1 PID: 8230 at kernel/locking/rwsem.c:1369 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 1 PID: 8230 at kernel/locking/rwsem.c:1369 up_write+0x469/0x520 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 1 PID: 8230 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-11952-gc760b3725e52 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x469/0x520 kernel/locking/rwsem.c:1632
Code: ea 03 80 3c 02 00 75 53 48 8b 13 4d 89 f1 41 55 4d 89 f8 4c 89 e1 48 c7 c6 60 a3 2c 8b 48 c7 c7 80 a2 2c 8b e8 a8 78 e5 ff 90 <0f> 0b 90 90 5a e9 96 fc ff ff 48 89 ef e8 f5 47 7f 00 e9 03 fd ff
RSP: 0018:ffffc900032e7d50 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888032eecac8 RCX: ffffc900234ca000
RDX: 0000000000040000 RSI: ffffffff81500016 RDI: 0000000000000001
RBP: ffff888032eecad0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888032eecac8
R13: ffffffff8b2ca1c0 R14: ffff88802ae6c880 R15: 0000000000000000
FS:  00007f72a5db36c0(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ced8a1000 CR3: 000000004e0dc000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:796 [inline]
 unlock_mount fs/namespace.c:2514 [inline]
 do_new_mount_fc fs/namespace.c:3295 [inline]
 do_new_mount fs/namespace.c:3354 [inline]
 path_mount+0x1b21/0x1f20 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+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f72a507cee9
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:00007f72a5db30c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f72a51ac050 RCX: 00007f72a507cee9
RDX: 0000000020000300 RSI: 00000000200002c0 RDI: 0000000000000000
RBP: 00007f72a50c949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f72a51ac050 R15: 00007ffc12e704f8
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/23 20:51 upstream c760b3725e52 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in path_mount
* Struck through repros no longer work on HEAD.