REISERFS (device loop3): Using r5 hash to sort names
REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage.
======================================================
WARNING: possible circular locking dependency detected
6.1.0-rc6-syzkaller-00251-g0b1dcc2cf55a #0 Not tainted
------------------------------------------------------
syz-executor.3/27124 is trying to acquire lock:
ffff88805d540090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27
but task is already holding lock:
ffff888060b6b140 (&type->i_mutex_dir_key#15/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
ffff888060b6b140 (&type->i_mutex_dir_key#15/1){+.+.}-{3:3}, at: filename_create+0x1aa/0x4a0 fs/namei.c:3807
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&type->i_mutex_dir_key#15/1){+.+.}-{3:3}:
down_write_nested+0x98/0x220 kernel/locking/rwsem.c:1672
inode_lock_nested include/linux/fs.h:791 [inline]
filename_create+0x1aa/0x4a0 fs/namei.c:3807
do_symlinkat+0xc8/0x2e0 fs/namei.c:4420
__do_sys_symlink fs/namei.c:4452 [inline]
__se_sys_symlink fs/namei.c:4450 [inline]
__ia32_sys_symlink+0x78/0x90 fs/namei.c:4450
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
-> #1 (sb_writers#32){.+.+}-{0:0}:
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
__sb_start_write include/linux/fs.h:1826 [inline]
sb_start_write include/linux/fs.h:1901 [inline]
mnt_want_write_file+0x92/0x590 fs/namespace.c:437
reiserfs_ioctl+0x1a2/0x330 fs/reiserfs/ioctl.c:103
reiserfs_compat_ioctl+0x6b/0x90 fs/reiserfs/ioctl.c:146
__do_compat_sys_ioctl+0x255/0x2b0 fs/ioctl.c:968
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
-> #0 (&sbi->lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3097 [inline]
check_prevs_add kernel/locking/lockdep.c:3216 [inline]
validate_chain kernel/locking/lockdep.c:3831 [inline]
__lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747
reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27
reiserfs_lookup+0x175/0x490 fs/reiserfs/namei.c:364
__lookup_hash+0x117/0x180 fs/namei.c:1601
filename_create+0x1d6/0x4a0 fs/namei.c:3808
do_symlinkat+0xc8/0x2e0 fs/namei.c:4420
__do_sys_symlink fs/namei.c:4452 [inline]
__se_sys_symlink fs/namei.c:4450 [inline]
__ia32_sys_symlink+0x78/0x90 fs/namei.c:4450
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
other info that might help us debug this:
Chain exists of:
&sbi->lock --> sb_writers#32 --> &type->i_mutex_dir_key#15/1
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&type->i_mutex_dir_key#15/1);
lock(sb_writers#32);
lock(&type->i_mutex_dir_key#15/1);
lock(&sbi->lock);
*** DEADLOCK ***
2 locks held by syz-executor.3/27124:
#0: ffff888066ba0460 (sb_writers#32){.+.+}-{0:0}, at: filename_create+0xf1/0x4a0 fs/namei.c:3800
#1: ffff888060b6b140 (&type->i_mutex_dir_key#15/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
#1: ffff888060b6b140 (&type->i_mutex_dir_key#15/1){+.+.}-{3:3}, at: filename_create+0x1aa/0x4a0 fs/namei.c:3807
stack backtrace:
CPU: 1 PID: 27124 Comm: syz-executor.3 Not tainted 6.1.0-rc6-syzkaller-00251-g0b1dcc2cf55a #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2177
check_prev_add kernel/locking/lockdep.c:3097 [inline]
check_prevs_add kernel/locking/lockdep.c:3216 [inline]
validate_chain kernel/locking/lockdep.c:3831 [inline]
__lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747
reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27
reiserfs_lookup+0x175/0x490 fs/reiserfs/namei.c:364
__lookup_hash+0x117/0x180 fs/namei.c:1601
filename_create+0x1d6/0x4a0 fs/namei.c:3808
do_symlinkat+0xc8/0x2e0 fs/namei.c:4420
__do_sys_symlink fs/namei.c:4452 [inline]
__se_sys_symlink fs/namei.c:4450 [inline]
__ia32_sys_symlink+0x78/0x90 fs/namei.c:4450
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: 0023:0xf7f38549
Code: 03 74 c0 01 10 05 03 74 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 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:00000000f7f335cc EFLAGS: 00000296 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000020000140 RCX: 00000000200000c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
----------------
Code disassembly (best guess):
0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi
4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d
a: 10 06 adc %al,(%rsi)
c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
10: 10 07 adc %al,(%rdi)
12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
16: 10 08 adc %cl,(%rax)
18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1c: 00 00 add %al,(%rax)
1e: 00 00 add %al,(%rax)
20: 00 51 52 add %dl,0x52(%rcx)
23: 55 push %rbp
24: 89 e5 mov %esp,%ebp
26: 0f 34 sysenter
28: cd 80 int $0x80
* 2a: 5d pop %rbp <-- trapping instruction
2b: 5a pop %rdx
2c: 59 pop %rcx
2d: c3 retq
2e: 90 nop
2f: 90 nop
30: 90 nop
31: 90 nop
32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi