ext4 filesystem being mounted at /syzkaller-testdir3035035908/syzkaller.jmyxRK/3174/bus supports timestamps until 2038 (0x7fffffff) EXT4-fs error (device loop2): ext4_get_first_dir_block:3524: inode #12: comm syz-executor.2: directory missing '.' ===================================== WARNING: bad unlock balance detected! 6.3.0-rc2-syzkaller-00387-g534293368afa #0 Not tainted ------------------------------------- syz-executor.2/7692 is trying to release lock (&type->i_mutex_dir_key) at: [] inode_unlock include/linux/fs.h:763 [inline] [] ext4_rename+0x569/0x27c0 fs/ext4/namei.c:4029 but there are no more locks to release! other info that might help us debug this: 2 locks held by syz-executor.2/7692: #0: ffff88804bc70460 (sb_writers#4){.+.+}-{0:0}, at: do_renameat2+0x37f/0xc90 fs/namei.c:4859 #1: ffff88800fe08e08 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff88800fe08e08 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename+0x229/0x280 fs/namei.c:2991 stack backtrace: CPU: 1 PID: 7692 Comm: syz-executor.2 Not tainted 6.3.0-rc2-syzkaller-00387-g534293368afa #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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+0x4f1/0x670 kernel/locking/lockdep.c:5689 up_write+0x2a/0x520 kernel/locking/rwsem.c:1625 inode_unlock include/linux/fs.h:763 [inline] ext4_rename+0x569/0x27c0 fs/ext4/namei.c:4029 ext4_rename2+0x1c7/0x270 fs/ext4/namei.c:4202 vfs_rename+0xef6/0x17a0 fs/namei.c:4772 do_renameat2+0xb62/0xc90 fs/namei.c:4923 __do_sys_renameat2 fs/namei.c:4956 [inline] __se_sys_renameat2 fs/namei.c:4953 [inline] __ia32_sys_renameat2+0xe8/0x120 fs/namei.c:4953 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f0c579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f075cc EFLAGS: 00000296 ORIG_RAX: 0000000000000161 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200001c0 RDX: 0000000000000004 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888028c2ddd8, owner = 0x0, curr 0xffff88801cea57c0, list empty WARNING: CPU: 1 PID: 7692 at kernel/locking/rwsem.c:1369 __up_write kernel/locking/rwsem.c:1369 [inline] WARNING: CPU: 1 PID: 7692 at kernel/locking/rwsem.c:1369 up_write+0x425/0x520 kernel/locking/rwsem.c:1626 Modules linked in: CPU: 1 PID: 7692 Comm: syz-executor.2 Not tainted 6.3.0-rc2-syzkaller-00387-g534293368afa #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 60 52 4c 8a 48 c7 c7 00 51 4c 8a e8 7b 1b e8 ff <0f> 0b 59 e9 dd fc ff ff 48 89 df e8 eb aa 70 00 e9 1a fc ff ff 48 RSP: 0018:ffffc900284b7980 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffffff8a4c5040 RCX: ffffc90006051000 RDX: 0000000000040000 RSI: ffffffff814b6037 RDI: 0000000000000001 RBP: ffff888028c2ddd8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 57525f4755424544 R12: ffff888028c2dde0 R13: ffff888028c2ddd8 R14: ffff88801cea57c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802ca80000(0063) knlGS:00000000f7f07b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7378000 CR3: 0000000074175000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inode_unlock include/linux/fs.h:763 [inline] ext4_rename+0x569/0x27c0 fs/ext4/namei.c:4029 ext4_rename2+0x1c7/0x270 fs/ext4/namei.c:4202 vfs_rename+0xef6/0x17a0 fs/namei.c:4772 do_renameat2+0xb62/0xc90 fs/namei.c:4923 __do_sys_renameat2 fs/namei.c:4956 [inline] __se_sys_renameat2 fs/namei.c:4953 [inline] __ia32_sys_renameat2+0xe8/0x120 fs/namei.c:4953 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f0c579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f075cc EFLAGS: 00000296 ORIG_RAX: 0000000000000161 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200001c0 RDX: 0000000000000004 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 retq 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi