WARNING in do_symlinkat (4)

Status: auto-obsoleted due to no activity on 2026/03/27 20:29
Reported-by: syzbot+374bf744a42605499ce8@syzkaller.appspotmail.com
First crash: 218d, last: 218d
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in do_symlinkat -1 2 1018d 1049d 0/3 auto-obsoleted due to no activity on 2024/01/17 15:16
linux-6.6 WARNING in do_symlinkat -1 1 182d 182d 0/2 auto-obsoleted due to no activity on 2026/05/03 00:31
linux-5.15 WARNING in do_symlinkat (2) origin:lts-only -1 syz inconclusive 4 978d 1025d 0/3 auto-obsoleted due to no activity on 2024/10/05 04:07
linux-6.1 WARNING in do_symlinkat (3) -1 2 448d 529d 0/3 auto-obsoleted due to no activity on 2025/08/09 17:08
linux-6.1 WARNING in do_symlinkat (2) -1 4 643d 750d 0/3 auto-obsoleted due to no activity on 2025/01/27 06:22
linux-5.15 WARNING in do_symlinkat -1 1 1149d 1149d 0/3 auto-obsoleted due to no activity on 2023/09/09 00:28
upstream WARNING in do_symlinkat ntfs3 -1 C error done 66 1146d 1310d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in do_symlinkat (2) ntfs3 -1 C error unreliable 89 166d 1070d 0/29 auto-obsoleted due to no activity on 2026/05/19 13:09

Sample crash report:
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff0000f6f30330, owner = 0x0, curr 0xffff0000d6ee1bc0, list empty
WARNING: CPU: 0 PID: 9656 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 0 PID: 9656 at kernel/locking/rwsem.c:1372 up_write+0x494/0x5c0 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 0 PID: 9656 Comm: syz.7.1194 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __up_write kernel/locking/rwsem.c:1371 [inline]
pc : up_write+0x494/0x5c0 kernel/locking/rwsem.c:1626
lr : __up_write kernel/locking/rwsem.c:1371 [inline]
lr : up_write+0x494/0x5c0 kernel/locking/rwsem.c:1626
sp : ffff800023437c20
x29: ffff800023437c30 x28: 1fffe0001aac3440 x27: ffff800023437c80
x26: dfff800000000000 x25: 1fffe0001ede6073 x24: ffff0000f6f30388
x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000d6ee1bc0
x20: ffff0000f6f30330 x19: ffff0000f6f30330 x18: ffff800011a5bd40
x17: 1fffe00033ee7b7e x16: ffff8000082d3a08 x15: 0000000040000000
x14: 0000000000000002 x13: 1ffff00002a0a0b1 x12: 0000000000ff0100
x11: ff0080000a895d54 x10: 0000000000000003 x9 : b18e5f1ab556a900
x8 : b18e5f1ab556a900 x7 : ffff8000082532dc x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000007 x1 : ffff800011a5d840 x0 : ffff80018a798000
Call trace:
 __up_write kernel/locking/rwsem.c:1371 [inline]
 up_write+0x494/0x5c0 kernel/locking/rwsem.c:1626
 inode_unlock include/linux/fs.h:763 [inline]
 done_path_create fs/namei.c:3935 [inline]
 do_symlinkat+0x1a8/0x350 fs/namei.c:4511
 __do_sys_symlinkat fs/namei.c:4525 [inline]
 __se_sys_symlinkat fs/namei.c:4522 [inline]
 __arm64_sys_symlinkat+0xa4/0xbc fs/namei.c:4522
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 324
hardirqs last  enabled at (323): [<ffff800008253370>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (323): [<ffff800008253370>] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003
hardirqs last disabled at (324): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (316): [<ffff8000081aa3e0>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (316): [<ffff8000081aa3e0>] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624
softirqs last disabled at (273): [<ffff800008020164>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/17 20:28 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_symlinkat
* Struck through repros no longer work on HEAD.