===================================== WARNING: bad unlock balance detected! 6.2.0-syzkaller-13467-g0988a0ea7919 #0 Not tainted ------------------------------------- syz-executor.4/15460 is trying to release lock (&type->i_mutex_dir_key) at: [] inode_unlock include/linux/fs.h:763 [inline] [] ext4_rename+0x14aa/0x26d0 fs/ext4/namei.c:4017 but there are no more locks to release! other info that might help us debug this: 2 locks held by syz-executor.4/15460: #0: ffff88802daae460 (sb_writers#4){.+.+}-{0:0}, at: do_renameat2+0x37f/0xc90 fs/namei.c:4859 #1: ffff88803e36f258 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff88803e36f258 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename+0x229/0x280 fs/namei.c:2991 stack backtrace: CPU: 0 PID: 15460 Comm: syz-executor.4 Not tainted 6.2.0-syzkaller-13467-g0988a0ea7919 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 __lock_release kernel/locking/lockdep.c:5346 [inline] lock_release+0x55c/0x780 kernel/locking/lockdep.c:5689 up_write+0x2a/0x520 kernel/locking/rwsem.c:1625 inode_unlock include/linux/fs.h:763 [inline] ext4_rename+0x14aa/0x26d0 fs/ext4/namei.c:4017 ext4_rename2+0x1c7/0x270 fs/ext4/namei.c:4193 vfs_rename+0xef6/0x17a0 fs/namei.c:4772 do_renameat2+0xb62/0xc90 fs/namei.c:4923 __do_sys_rename fs/namei.c:4969 [inline] __se_sys_rename fs/namei.c:4967 [inline] __x64_sys_rename+0x81/0xa0 fs/namei.c:4967 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f29afc8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f29ae7fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f29afdabf80 RCX: 00007f29afc8c0f9 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 00000000200000c0 RBP: 00007f29afce7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffea4c4f4af R14: 00007f29ae7fe300 R15: 0000000000022000 ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff8880868517a0, owner = 0x0, curr 0xffff88802ba71d40, list empty WARNING: CPU: 1 PID: 15460 at kernel/locking/rwsem.c:1369 __up_write kernel/locking/rwsem.c:1369 [inline] WARNING: CPU: 1 PID: 15460 at kernel/locking/rwsem.c:1369 up_write+0x425/0x520 kernel/locking/rwsem.c:1626 Modules linked in: CPU: 1 PID: 15460 Comm: syz-executor.4 Not tainted 6.2.0-syzkaller-13467-g0988a0ea7919 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline] RIP: 0010:up_write+0x425/0x520 kernel/locking/rwsem.c:1626 Code: 3c 02 00 0f 85 da 00 00 00 48 8b 55 00 4d 89 f1 53 4d 89 f8 4c 89 e9 48 c7 c6 80 61 4c 8a 48 c7 c7 c0 5f 4c 8a e8 bb 9c e7 ff <0f> 0b 59 e9 dd fc ff ff 48 89 df e8 4b 9b 71 00 e9 1a fc ff ff 48 RSP: 0018:ffffc900053679b8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff8a4c5f00 RCX: ffffc90010c33000 RDX: 0000000000040000 RSI: ffffffff814c7887 RDI: 0000000000000001 RBP: ffff8880868517a0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 57525f4755424544 R12: ffff8880868517a8 R13: ffff8880868517a0 R14: ffff88802ba71d40 R15: 0000000000000000 FS: 00007f29ae7fe700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3262e000 CR3: 000000002b422000 CR4: 0000000000350ee0 Call Trace: inode_unlock include/linux/fs.h:763 [inline] ext4_rename+0x14aa/0x26d0 fs/ext4/namei.c:4017 ext4_rename2+0x1c7/0x270 fs/ext4/namei.c:4193 vfs_rename+0xef6/0x17a0 fs/namei.c:4772 do_renameat2+0xb62/0xc90 fs/namei.c:4923 __do_sys_rename fs/namei.c:4969 [inline] __se_sys_rename fs/namei.c:4967 [inline] __x64_sys_rename+0x81/0xa0 fs/namei.c:4967 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f29afc8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f29ae7fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f29afdabf80 RCX: 00007f29afc8c0f9 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 00000000200000c0 RBP: 00007f29afce7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffea4c4f4af R14: 00007f29ae7fe300 R15: 0000000000022000