syzbot


WARNING in do_renameat2

Status: moderation: reported on 2024/12/04 17:47
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+88cbd18b49712c2dc6c0@syzkaller.appspotmail.com
First crash: 20d, last: 20d

Sample crash report:
netlink: 28 bytes leftover after parsing attributes in process `syz.0.0'.
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888052c8db98, owner = 0x0, curr 0xffff888000334880, list empty
WARNING: CPU: 0 PID: 5318 at kernel/locking/rwsem.c:1368 __up_write kernel/locking/rwsem.c:1367 [inline]
WARNING: CPU: 0 PID: 5318 at kernel/locking/rwsem.c:1368 up_write+0x502/0x590 kernel/locking/rwsem.c:1630
Modules linked in:
CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-11677-g2ba9f676d0a2 #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:__up_write kernel/locking/rwsem.c:1367 [inline]
RIP: 0010:up_write+0x502/0x590 kernel/locking/rwsem.c:1630
Code: c7 c7 c0 cc 0a 8c 48 c7 c6 40 cf 0a 8c 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 f3 27 e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 94 ce 1d 90 80 e1 07 80 c1 03
RSP: 0018:ffffc9000d3dfb40 EFLAGS: 00010292
RAX: d1ea3ab0a8fa3200 RBX: ffffffff8c0acda0 RCX: ffff888000334880
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000d3dfc10 R08: ffffffff81568c02 R09: fffffbfff1cfa8b0
R10: dffffc0000000000 R11: fffffbfff1cfa8b0 R12: 0000000000000000
R13: ffff888052c8db98 R14: 1ffff92001a7bf70 R15: dffffc0000000000
FS:  00007fdc302c16c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559fb2049188 CR3: 0000000052ae0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:823 [inline]
 unlock_rename fs/namei.c:3268 [inline]
 do_renameat2+0xe24/0x13f0 fs/namei.c:5230
 __do_sys_renameat2 fs/namei.c:5258 [inline]
 __se_sys_renameat2 fs/namei.c:5255 [inline]
 __x64_sys_renameat2+0xce/0xe0 fs/namei.c:5255
 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: 0033:0x7fdc2f580849
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:00007fdc302c1058 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007fdc2f746080 RCX: 00007fdc2f580849
RDX: ffffffffffffff9c RSI: 0000000020000400 RDI: 000000000000000c
RBP: 00007fdc2f5f3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000440 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdc2f746080 R15: 00007ffdeb377e08
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/30 17:42 upstream 2ba9f676d0a2 68914665 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in do_renameat2
* Struck through repros no longer work on HEAD.