------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff0000e3715bb0, owner = 0x0, curr 0xffff0000db41b680, list empty WARNING: CPU: 1 PID: 8759 at kernel/locking/rwsem.c:1323 __up_read+0x530/0x5d8 kernel/locking/rwsem.c:1323 Modules linked in: CPU: 1 PID: 8759 Comm: syz-executor 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_read+0x530/0x5d8 kernel/locking/rwsem.c:1323 lr : __up_read+0x530/0x5d8 kernel/locking/rwsem.c:1323 sp : ffff800022f27840 x29: ffff800022f278c0 x28: 1ffff0000282406b x27: 1ffff000045e4f0c x26: dfff800000000000 x25: ffff800014120000 x24: ffff800022f27860 x23: ffff0000db41b680 x22: 0000000000000000 x21: ffff0000e3715c08 x20: ffff0000e3715bb0 x19: ffff0000e3715bb0 x18: 0000000000000001 x17: 0000000000000000 x16: ffff800011169180 x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : d73e7aa7f575a600 x8 : d73e7aa7f575a600 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800022f27138 x4 : ffff8000141ff5a0 x3 : ffff8000085043fc x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000008c Call trace: __up_read+0x530/0x5d8 kernel/locking/rwsem.c:1323 up_read+0x94/0xe8 kernel/locking/rwsem.c:1594 inode_unlock_shared include/linux/fs.h:802 [inline] lookup_slow+0x68/0x80 fs/namei.c:1689 walk_component+0x2b0/0x3a8 fs/namei.c:1984 lookup_last fs/namei.c:2439 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2463 filename_lookup+0x180/0x414 fs/namei.c:2492 user_path_at_empty+0x5c/0x1a0 fs/namei.c:2891 user_path_at include/linux/namei.h:57 [inline] do_mount fs/namespace.c:3374 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount fs/namespace.c:3562 [inline] __arm64_sys_mount+0x4e0/0x5e4 fs/namespace.c:3562 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 76 hardirqs last enabled at (75): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (76): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (8): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (6): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 ---[ end trace c434d92d1d5202f5 ]--- ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON(tmp < 0): count = 0xffffffffffffff00, magic = 0xffff0000e3715bb0, owner = 0x0, curr 0xffff0000db41b680, list empty WARNING: CPU: 1 PID: 8759 at kernel/locking/rwsem.c:1328 __up_read+0x390/0x5d8 kernel/locking/rwsem.c:1328 Modules linked in: CPU: 1 PID: 8759 Comm: syz-executor Tainted: G W 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_read+0x390/0x5d8 kernel/locking/rwsem.c:1328 lr : __up_read+0x390/0x5d8 kernel/locking/rwsem.c:1328 sp : ffff800022f27840 x29: ffff800022f278c0 x28: ffffffffffffff00 x27: 1ffff000045e4f0c x26: dfff800000000000 x25: ffff0000e3715bb0 x24: ffff0000e3715c08 x23: 1fffe0001c6e2b77 x22: ffffffffffffff00 x21: 0000000000000000 x20: ffff0000db41b680 x19: ffff0000e3715bb0 x18: 0000000000000002 x17: 0000000000000000 x16: ffff800011169180 x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100 x11: 0000000000000001 x10: 0000000000000000 x9 : d73e7aa7f575a600 x8 : d73e7aa7f575a600 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800022f27138 x4 : ffff8000141ff5a0 x3 : ffff8000085043fc x2 : 0000000000000001 x1 : 0000000100000001 x0 : 0000000000000087 Call trace: __up_read+0x390/0x5d8 kernel/locking/rwsem.c:1328 up_read+0x94/0xe8 kernel/locking/rwsem.c:1594 inode_unlock_shared include/linux/fs.h:802 [inline] lookup_slow+0x68/0x80 fs/namei.c:1689 walk_component+0x2b0/0x3a8 fs/namei.c:1984 lookup_last fs/namei.c:2439 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2463 filename_lookup+0x180/0x414 fs/namei.c:2492 user_path_at_empty+0x5c/0x1a0 fs/namei.c:2891 user_path_at include/linux/namei.h:57 [inline] do_mount fs/namespace.c:3374 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount fs/namespace.c:3562 [inline] __arm64_sys_mount+0x4e0/0x5e4 fs/namespace.c:3562 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 107 hardirqs last enabled at (107): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (107): [] exit_to_kernel_mode+0xe0/0x168 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (106): [] preempt_schedule_irq+0xac/0x214 kernel/sched/core.c:6800 softirqs last enabled at (102): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (102): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (79): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (79): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (79): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (79): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace c434d92d1d5202f6 ]---