------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff0000dd104ac8, owner = 0x0, curr 0xffff0000cfab8000, list empty WARNING: CPU: 0 PID: 7990 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline] WARNING: CPU: 0 PID: 7990 at kernel/locking/rwsem.c:1370 up_write+0x524/0x760 kernel/locking/rwsem.c:1632 Modules linked in: CPU: 0 PID: 7990 Comm: syz.3.223 Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __up_write kernel/locking/rwsem.c:1369 [inline] pc : up_write+0x524/0x760 kernel/locking/rwsem.c:1632 lr : __up_write kernel/locking/rwsem.c:1369 [inline] lr : up_write+0x524/0x760 kernel/locking/rwsem.c:1632 sp : ffff8000997c79c0 x29: ffff8000997c7a40 x28: ffff80008f5eb1c0 x27: 1fffe0001ba20966 x26: dfff800000000000 x25: 1fffe0001ba2095a x24: ffff0000dd104b20 x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000cfab8000 x20: ffff0000dd104ac8 x19: ffff0000dd104ac8 x18: 1fffe000367a3dde x17: ffff80008f2dd000 x16: ffff80008032d32c x15: 0000000000000001 x14: 1fffe0001924a400 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001924a401 x10: 1fffe0001924a400 x9 : 8c1d5344b4fbfa00 x8 : 8c1d5344b4fbfa00 x7 : ffff8000802a3bb0 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff8000802900f4 x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __up_write kernel/locking/rwsem.c:1369 [inline] up_write+0x524/0x760 kernel/locking/rwsem.c:1632 inode_unlock include/linux/fs.h:796 [inline] chown_common+0x444/0x700 fs/open.c:792 do_fchownat+0x15c/0x234 fs/open.c:821 __do_sys_fchownat fs/open.c:836 [inline] __se_sys_fchownat fs/open.c:833 [inline] __arm64_sys_fchownat+0xb8/0xd4 fs/open.c:833 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 irq event stamp: 426 hardirqs last enabled at (425): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1418 [inline] hardirqs last enabled at (425): [] finish_lock_switch+0xbc/0x1e4 kernel/sched/core.c:5162 hardirqs last disabled at (426): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470 softirqs last enabled at (418): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (418): [] handle_softirqs+0xa3c/0xbfc kernel/softirq.c:582 softirqs last disabled at (287): [] __do_softirq+0x14/0x20 kernel/softirq.c:588 ---[ end trace 0000000000000000 ]---