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DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff0000f57000e0, owner = 0x0, curr 0xffff0000de631bc0, list empty
WARNING: CPU: 1 PID: 4504 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 4504 at kernel/locking/rwsem.c:1372 up_write+0x494/0x5bc kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 4504 Comm: syz.3.12 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+0x494/0x5bc kernel/locking/rwsem.c:1626
lr : __up_write kernel/locking/rwsem.c:1371 [inline]
lr : up_write+0x494/0x5bc kernel/locking/rwsem.c:1626
sp : ffff8000211a7ac0
x29: ffff8000211a7ad0 x28: 0000000000000000 x27: ffff800015293ac0
x26: dfff800000000000 x25: 1fffe0001eae0029 x24: ffff0000f5700138
x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000de631bc0
x20: ffff0000f57000e0 x19: ffff0000f57000e0 x18: ffff800011b8bf60
x17: 1fffe00033eac97e x16: ffff8000082d9364 x15: ffff80001520d000
x14: 0000000000000001 x13: 1fffe0001a367c10 x12: 0000000000000000
x11: 0000000000000000 x10: ffff60001a367c11 x9 : 0a85f035ffa5a200
x8 : 0a85f035ffa5a200 x7 : ffff80000825796c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800008246798
x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 __up_write kernel/locking/rwsem.c:1371 [inline]
 up_write+0x494/0x5bc kernel/locking/rwsem.c:1626
 inode_unlock include/linux/fs.h:763 [inline]
 chown_common+0x42c/0x594 fs/open.c:738
 do_fchownat+0x13c/0x248 fs/open.c:767
 __do_sys_fchownat fs/open.c:782 [inline]
 __se_sys_fchownat fs/open.c:779 [inline]
 __arm64_sys_fchownat+0xb8/0xd4 fs/open.c:779
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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: 402
hardirqs last  enabled at (401): [<ffff800008257a00>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline]
hardirqs last  enabled at (401): [<ffff800008257a00>] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5004
hardirqs last disabled at (402): [<ffff800011a223fc>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (204): [<ffff80000a1d7148>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (202): [<ffff80000a1d7114>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---