EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. ===================================== WARNING: bad unlock balance detected! 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 Not tainted ------------------------------------- syz-executor.0/7589 is trying to release lock (&type->i_mutex_dir_key) at: [] inode_unlock include/linux/fs.h:763 [inline] [] ext4_rename fs/ext4/namei.c:4017 [inline] [] ext4_rename2+0x2c2c/0x3264 fs/ext4/namei.c:4193 but there are no more locks to release! other info that might help us debug this: 2 locks held by syz-executor.0/7589: #0: ffff00010876a460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394 #1: ffff00010a628e08 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff00010a628e08 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename+0xf0/0x18c fs/namei.c:2991 stack backtrace: CPU: 0 PID: 7589 Comm: syz-executor.0 Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_unlock_imbalance_bug+0x250/0x2a4 kernel/locking/lockdep.c:5109 __lock_release kernel/locking/lockdep.c:5346 [inline] lock_release+0x5c8/0xb90 kernel/locking/lockdep.c:5689 up_write+0x94/0x76c kernel/locking/rwsem.c:1625 inode_unlock include/linux/fs.h:763 [inline] ext4_rename fs/ext4/namei.c:4017 [inline] ext4_rename2+0x2c2c/0x3264 fs/ext4/namei.c:4193 vfs_rename+0x908/0xcd4 fs/namei.c:4772 do_renameat2+0x980/0x1040 fs/namei.c:4923 __do_sys_renameat2 fs/namei.c:4956 [inline] __se_sys_renameat2 fs/namei.c:4953 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:4953 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff00010a5c49c8, owner = 0x0, curr 0xffff0000cc2551c0, list empty WARNING: CPU: 0 PID: 7589 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline] WARNING: CPU: 0 PID: 7589 at kernel/locking/rwsem.c:1370 up_write+0x530/0x76c kernel/locking/rwsem.c:1626 Modules linked in: CPU: 0 PID: 7589 Comm: syz-executor.0 Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __up_write kernel/locking/rwsem.c:1369 [inline] pc : up_write+0x530/0x76c kernel/locking/rwsem.c:1626 lr : __up_write kernel/locking/rwsem.c:1369 [inline] lr : up_write+0x530/0x76c kernel/locking/rwsem.c:1626 sp : ffff80002c0d7420 x29: ffff80002c0d74a0 x28: ffff70000581aeb8 x27: 1fffe000214b8946 x26: dfff800000000000 x25: 1fffe000214b893a x24: ffff00010a5c4a20 x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000cc2551c0 x20: ffff00010a5c49c8 x19: ffff00010a5c49c8 x18: 1fffe000368951b6 x17: ffff800015cdd000 x16: ffff800012461004 x15: 0000000000000000 x14: 0000000040000000 x13: 0000000000000002 x12: 0000000000000001 x11: ff80800008052a1c x10: 0000000040000002 x9 : 6d849445e83cbd00 x8 : 6d849445e83cbd00 x7 : 1fffe000368951b7 x6 : ffff80000828dc14 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff80002c0d6f60 x1 : 0000000000000000 x0 : ffff80000828dcb4 Call trace: __up_write kernel/locking/rwsem.c:1369 [inline] up_write+0x530/0x76c kernel/locking/rwsem.c:1626 inode_unlock include/linux/fs.h:763 [inline] ext4_rename fs/ext4/namei.c:4017 [inline] ext4_rename2+0x2c2c/0x3264 fs/ext4/namei.c:4193 vfs_rename+0x908/0xcd4 fs/namei.c:4772 do_renameat2+0x980/0x1040 fs/namei.c:4923 __do_sys_renameat2 fs/namei.c:4956 [inline] __se_sys_renameat2 fs/namei.c:4953 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:4953 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 7041 hardirqs last enabled at (7041): [] __call_rcu_common kernel/rcu/tree.c:2658 [inline] hardirqs last enabled at (7041): [] call_rcu+0x65c/0xb38 kernel/rcu/tree.c:2736 hardirqs last disabled at (7040): [] __call_rcu_common kernel/rcu/tree.c:2623 [inline] hardirqs last disabled at (7040): [] call_rcu+0x114/0xb38 kernel/rcu/tree.c:2736 softirqs last enabled at (6954): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (6954): [] __do_softirq+0xd64/0xfbc kernel/softirq.c:600 softirqs last disabled at (6907): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]---