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DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff0000f6e94ac8, owner = 0x0, curr 0xffff0000e1475340, list empty
WARNING: CPU: 0 PID: 4507 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 0 PID: 4507 at kernel/locking/rwsem.c:1372 up_write+0x494/0x5bc kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 0 PID: 4507 Comm: syz.2.11 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
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 : ffff800020f87ac0
x29: ffff800020f87ad0 x28: 0000000000000000 x27: ffff8000152a3ac0
x26: dfff800000000000 x25: 1fffe0001edd2966 x24: ffff0000f6e94b20
x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000e1475340
x20: ffff0000f6e94ac8 x19: ffff0000f6e94ac8 x18: ffff800011b9bf60
x17: 0000000000000000 x16: ffff8000082d92bc x15: 0000000000000002
x14: 0000000000000001 x13: 1fffe00033ea63a3 x12: 0000000000080000
x11: 000000000000a7ce x10: ffff800027679000 x9 : c7a95137286f0d00
x8 : c7a95137286f0d00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020f87558 x4 : ffff800015304cc0 x3 : ffff800008538848
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000
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: 148
hardirqs last  enabled at (147): [<ffff80000830fac4>] __up_console_sem+0xb4/0xfc kernel/printk/printk.c:261
hardirqs last disabled at (148): [<ffff800011a33e5c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (30): [<ffff800008030954>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (28): [<ffff800008030920>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---