------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff0000e9634cf0, owner = 0x0, curr 0xffff0000c12b9b40, list empty WARNING: CPU: 1 PID: 4512 at kernel/locking/rwsem.c:1315 __up_read+0x568/0x60c kernel/locking/rwsem.c:1315 Modules linked in: CPU: 1 PID: 4512 Comm: syz-executor.4 Not tainted 5.15.153-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __up_read+0x568/0x60c kernel/locking/rwsem.c:1315 lr : __up_read+0x568/0x60c kernel/locking/rwsem.c:1315 sp : ffff8000203377c0 x29: ffff800020337840 x28: 1ffff0000292206a x27: ffff800014910000 x26: dfff800000000000 x25: 0000000000000000 x24: ffff0000e9634d48 x23: ffff0000c12b9b40 x22: ffff8000203377e0 x21: 0000000000000000 x20: ffff0000e9634cf0 x19: ffff0000e9634cf0 x18: 1fffe0003690298e x17: 1fffe0003690298e x16: ffff80001197d2b4 x15: ffff8000149aec00 x14: 1ffff0000292206a x13: dfff800000000000 x12: 0000000000040000 x11: 0000000000005be4 x10: ffff80001e992000 x9 : d189e2d7aa0bc900 x8 : d189e2d7aa0bc900 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000a960a80 x2 : ffff0001b4814d10 x1 : 0000000100000000 x0 : 000000000000008c Call trace: __up_read+0x568/0x60c kernel/locking/rwsem.c:1315 up_read+0x94/0xe8 kernel/locking/rwsem.c:1584 inode_unlock_shared include/linux/fs.h:804 [inline] lookup_slow+0x6c/0x84 fs/namei.c:1681 walk_component+0x394/0x4cc fs/namei.c:1976 lookup_last fs/namei.c:2431 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2455 filename_lookup+0x1c4/0x4c8 fs/namei.c:2484 user_path_at_empty+0x5c/0x1a4 fs/namei.c:2883 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:490 [inline] __se_sys_chdir fs/open.c:484 [inline] __arm64_sys_chdir+0xc0/0x2d0 fs/open.c:484 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 314 hardirqs last enabled at (313): [<ffff800008269abc>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline] hardirqs last enabled at (313): [<ffff800008269abc>] finish_lock_switch+0xbc/0x1e8 kernel/sched/core.c:4784 hardirqs last disabled at (314): [<ffff800011978940>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (308): [<ffff800008021c64>] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (308): [<ffff800008021c64>] __do_softirq+0xb5c/0xdb0 kernel/softirq.c:587 softirqs last disabled at (193): [<ffff8000081b6568>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (193): [<ffff8000081b6568>] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (193): [<ffff8000081b6568>] __irq_exit_rcu+0x264/0x4d4 kernel/softirq.c:637 ---[ end trace b83c8cee2df45197 ]--- ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON(tmp < 0): count = 0xffffffffffffff00, magic = 0xffff0000e9634cf0, owner = 0x0, curr 0xffff0000c12b9b40, list empty WARNING: CPU: 0 PID: 4512 at kernel/locking/rwsem.c:1320 __up_read+0x3d0/0x60c kernel/locking/rwsem.c:1320 Modules linked in: CPU: 0 PID: 4512 Comm: syz-executor.4 Tainted: G W 5.15.153-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __up_read+0x3d0/0x60c kernel/locking/rwsem.c:1320 lr : __up_read+0x3d0/0x60c kernel/locking/rwsem.c:1320 sp : ffff8000203377c0 x29: ffff800020337840 x28: 1ffff0000292206a x27: ffff800014910000 x26: dfff800000000000 x25: ffffffffffffff00 x24: ffff0000e9634d48 x23: ffff0000e9634cf0 x22: ffffffffffffff00 x21: 0000000000000000 x20: ffff0000c12b9b40 x19: ffff0000e9634cf0 x18: 0000000000000002 x17: 0000000000000002 x16: ffff800008334f5c x15: 00000000ffffffff x14: ffff0000c12b9b40 x13: 0000000000000001 x12: 0000000000040000 x11: 000000000001766d x10: ffff80001e992000 x9 : d189e2d7aa0bc900 x8 : d189e2d7aa0bc900 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800020336f38 x4 : ffff8000149ef7a0 x3 : ffff8000083350a8 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000087 Call trace: __up_read+0x3d0/0x60c kernel/locking/rwsem.c:1320 up_read+0x94/0xe8 kernel/locking/rwsem.c:1584 inode_unlock_shared include/linux/fs.h:804 [inline] lookup_slow+0x6c/0x84 fs/namei.c:1681 walk_component+0x394/0x4cc fs/namei.c:1976 lookup_last fs/namei.c:2431 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2455 filename_lookup+0x1c4/0x4c8 fs/namei.c:2484 user_path_at_empty+0x5c/0x1a4 fs/namei.c:2883 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:490 [inline] __se_sys_chdir fs/open.c:484 [inline] __arm64_sys_chdir+0xc0/0x2d0 fs/open.c:484 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 481 hardirqs last enabled at (481): [<ffff80001197b748>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (481): [<ffff80001197b748>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (480): [<ffff800011a402b4>] preempt_schedule_irq+0xac/0x274 kernel/sched/core.c:6781 softirqs last enabled at (476): [<ffff800008021c64>] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (476): [<ffff800008021c64>] __do_softirq+0xb5c/0xdb0 kernel/softirq.c:587 softirqs last disabled at (317): [<ffff8000081b6568>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (317): [<ffff8000081b6568>] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (317): [<ffff8000081b6568>] __irq_exit_rcu+0x264/0x4d4 kernel/softirq.c:637 ---[ end trace b83c8cee2df45198 ]---