------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x1, magic = 0xffff0000e7c50330, owner = 0xffff0000cdd01bc0, curr 0xffff0000ca189bc0, list empty WARNING: CPU: 0 PID: 7514 at kernel/locking/rwsem.c:1343 __up_read+0x554/0x5f8 kernel/locking/rwsem.c:1343 Modules linked in: CPU: 0 PID: 7514 Comm: syz-executor.0 Not tainted 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __up_read+0x554/0x5f8 kernel/locking/rwsem.c:1343 lr : __up_read+0x554/0x5f8 kernel/locking/rwsem.c:1343 sp : ffff800098457880 x29: ffff800098457910 x28: 1ffff00011c680bc x27: ffff80008e340000 x26: dfff800000000000 x25: 0000000000000001 x24: ffff0000e7c50388 x23: ffff0000ca189bc0 x22: ffff8000984578a0 x21: ffff0000cdd01bc0 x20: ffff0000e7c50330 x19: ffff0000e7c50330 x18: ffff8000984572c0 x17: 0000000000000000 x16: ffff800080316308 x15: 0000000000000001 x14: 1fffe000368317a8 x13: 0000000000000000 x12: 0000000000000003 x11: 0000000000000001 x10: 0000000000000003 x9 : 62476bf63d248b00 x8 : 62476bf63d248b00 x7 : ffff80008a7f12f4 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000ca189bc0 x1 : ffff80008a87dae0 x0 : ffff800125ee3000 Call trace: __up_read+0x554/0x5f8 kernel/locking/rwsem.c:1343 up_read+0x2c/0x3c kernel/locking/rwsem.c:1616 inode_unlock_shared include/linux/fs.h:817 [inline] lookup_slow+0x6c/0x84 fs/namei.c:1712 walk_component+0x280/0x36c fs/namei.c:2002 lookup_last fs/namei.c:2459 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2483 filename_lookup+0x1d4/0x4e0 fs/namei.c:2512 user_path_at_empty+0x5c/0x84 fs/namei.c:2911 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:551 [inline] __se_sys_chdir fs/open.c:545 [inline] __arm64_sys_chdir+0xc0/0x2d0 fs/open.c:545 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 480 hardirqs last enabled at (479): [] raw_spin_rq_unlock_irq+0x14/0x24 kernel/sched/sched.h:1384 hardirqs last disabled at (480): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:436 softirqs last enabled at (344): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (344): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:582 softirqs last disabled at (307): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON(tmp < 0): count = 0xffffffffffffff00, magic = 0xffff0000e7c50330, owner = 0x0, curr 0xffff0000ca189bc0, list empty WARNING: CPU: 0 PID: 7514 at kernel/locking/rwsem.c:1348 __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1348 Modules linked in: CPU: 0 PID: 7514 Comm: syz-executor.0 Tainted: G W 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1348 lr : __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1348 sp : ffff800098457880 x29: ffff800098457910 x28: 1ffff00011c680bc x27: ffff80008e340000 x26: dfff800000000000 x25: ffffffffffffff00 x24: ffff0000e7c50388 x23: ffff0000e7c50330 x22: ffffffffffffff00 x21: 0000000000000000 x20: ffff0000ca189bc0 x19: ffff0000e7c50330 x18: ffff8000984572c0 x17: 0000000000000000 x16: ffff80008a71b23c x15: 0000000000000001 x14: 1ffff0001308ae64 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000000000 x9 : 62476bf63d248b00 x8 : 62476bf63d248b00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800098457178 x4 : ffff80008e4210a0 x3 : ffff800082b180c4 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1348 up_read+0x2c/0x3c kernel/locking/rwsem.c:1616 inode_unlock_shared include/linux/fs.h:817 [inline] lookup_slow+0x6c/0x84 fs/namei.c:1712 walk_component+0x280/0x36c fs/namei.c:2002 lookup_last fs/namei.c:2459 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2483 filename_lookup+0x1d4/0x4e0 fs/namei.c:2512 user_path_at_empty+0x5c/0x84 fs/namei.c:2911 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:551 [inline] __se_sys_chdir fs/open.c:545 [inline] __arm64_sys_chdir+0xc0/0x2d0 fs/open.c:545 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 581 hardirqs last enabled at (581): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (581): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (580): [] preempt_schedule_irq+0x90/0x188 kernel/sched/core.c:7008 softirqs last enabled at (576): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (576): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:582 softirqs last disabled at (483): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]---