REISERFS (device loop0): Using r5 hash to sort names
reiserfs: enabling write barrier flush mode
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
======================================================
WARNING: possible circular locking dependency detected
5.15.124-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor392/3498 is trying to acquire lock:
ffff888147edf090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27
but task is already holding lock:
ffff888078012558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a9/0x440 mm/memory.c:2892
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (sb_pagefaults){.+.+}-{0:0}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
__sb_start_write include/linux/fs.h:1742 [inline]
sb_start_pagefault include/linux/fs.h:1841 [inline]
filemap_page_mkwrite+0x11b/0x650 mm/filemap.c:3358
do_page_mkwrite+0x1a9/0x440 mm/memory.c:2892
do_shared_fault mm/memory.c:4298 [inline]
do_fault mm/memory.c:4366 [inline]
handle_pte_fault mm/memory.c:4621 [inline]
__handle_mm_fault mm/memory.c:4756 [inline]
handle_mm_fault+0x2803/0x5950 mm/memory.c:4854
do_user_addr_fault arch/x86/mm/fault.c:1397 [inline]
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:205
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
copyout lib/iov_iter.c:157 [inline]
copy_page_to_iter_iovec lib/iov_iter.c:228 [inline]
__copy_page_to_iter lib/iov_iter.c:861 [inline]
copy_page_to_iter+0x49a/0x10d0 lib/iov_iter.c:889
filemap_read+0x20f6/0x2980 mm/filemap.c:2689
call_read_iter include/linux/fs.h:2097 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa9f/0xe10 fs/read_write.c:485
ksys_read+0x1a2/0x2c0 fs/read_write.c:623
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
-> #1 (&mm->mmap_lock#2){++++}-{3:3}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__might_fault+0xb4/0x110 mm/memory.c:5324
reiserfs_ioctl+0x11d/0x340 fs/reiserfs/ioctl.c:96
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
-> #0 (&sbi->lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27
reiserfs_dirty_inode+0xee/0x240 fs/reiserfs/super.c:704
__mark_inode_dirty+0x2fd/0xd60 fs/fs-writeback.c:2442
generic_update_time+0x1cb/0x1e0 fs/inode.c:1817
inode_update_time fs/inode.c:1830 [inline]
file_update_time+0x3eb/0x460 fs/inode.c:2019
filemap_page_mkwrite+0x222/0x650 mm/filemap.c:3359
do_page_mkwrite+0x1a9/0x440 mm/memory.c:2892
do_shared_fault mm/memory.c:4298 [inline]
do_fault mm/memory.c:4366 [inline]
handle_pte_fault mm/memory.c:4621 [inline]
__handle_mm_fault mm/memory.c:4756 [inline]
handle_mm_fault+0x2803/0x5950 mm/memory.c:4854
do_user_addr_fault arch/x86/mm/fault.c:1397 [inline]
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:205
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
copyout lib/iov_iter.c:157 [inline]
copy_page_to_iter_iovec lib/iov_iter.c:228 [inline]
__copy_page_to_iter lib/iov_iter.c:861 [inline]
copy_page_to_iter+0x49a/0x10d0 lib/iov_iter.c:889
filemap_read+0x20f6/0x2980 mm/filemap.c:2689
call_read_iter include/linux/fs.h:2097 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa9f/0xe10 fs/read_write.c:485
ksys_read+0x1a2/0x2c0 fs/read_write.c:623
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
other info that might help us debug this:
Chain exists of:
&sbi->lock --> &mm->mmap_lock#2 --> sb_pagefaults
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(sb_pagefaults);
lock(&mm->mmap_lock#2);
lock(sb_pagefaults);
lock(&sbi->lock);
*** DEADLOCK ***
3 locks held by syz-executor392/3498:
#0: ffff88807f56e870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x21c/0x2b0 fs/file.c:1072
#1: ffff888078798f28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#1: ffff888078798f28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
#1: ffff888078798f28 (&mm->mmap_lock#2){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1485 [inline]
#1: ffff888078798f28 (&mm->mmap_lock#2){++++}-{3:3}, at: exc_page_fault+0x181/0x740 arch/x86/mm/fault.c:1541
#2: ffff888078012558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a9/0x440 mm/memory.c:2892
stack backtrace:
CPU: 0 PID: 3498 Comm: syz-executor392 Not tainted 5.15.124-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27
reiserfs_dirty_inode+0xee/0x240 fs/reiserfs/super.c:704
__mark_inode_dirty+0x2fd/0xd60 fs/fs-writeback.c:2442
generic_update_time+0x1cb/0x1e0 fs/inode.c:1817
inode_update_time fs/inode.c:1830 [inline]
file_update_time+0x3eb/0x460 fs/inode.c:2019
filemap_page_mkwrite+0x222/0x650 mm/filemap.c:3359
do_page_mkwrite+0x1a9/0x440 mm/memory.c:2892
do_shared_fault mm/memory.c:4298 [inline]
do_fault mm/memory.c:4366 [inline]
handle_pte_fault mm/memory.c:4621 [inline]
__handle_mm_fault mm/memory.c:4756 [inline]
handle_mm_fault+0x2803/0x5950 mm/memory.c:4854
do_user_addr_fault arch/x86/mm/fault.c:1397 [inline]
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:206
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 83 f8
RSP: 0018:ffffc900020ef8b0 EFLAGS: 00050206
RAX: ffffffff84049c01 RBX: 0000000020002740 RCX: 0000000000001000
RDX: 0000000000001000 RSI: ffff888072dc8000 RDI: 0000000020001740
RBP: ffffc900020efd20 R08: dffffc0000000000 R09: ffffed100e5b9200
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000020001740
R13: 0000000000001000 R14: ffff888072dc8000 R15: 00007ffffffff000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
copyout lib/iov_iter.c:157 [inline]
copy_page_to_iter_iovec lib/iov_iter.c:228 [inline]
__copy_page_to_iter lib/iov_iter.c:861 [inline]
copy_page_to_iter+0x49a/0x10d0 lib/iov_iter.c:889
filemap_read+0x20f6/0x2980 mm/filemap.c:2689
call_read_iter include/linux/fs.h:2097 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa9f/0xe10 fs/read_write.c:485
ksys_read+0x1a2/0x2c0 fs/read_write.c:623
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f343c133c79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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
----------------
Code disassembly (best guess):
0: 89 d1 mov %edx,%ecx
2: c1 e9 03 shr $0x3,%ecx
5: 83 e2 07 and $0x7,%edx
8: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi)
b: 89 d1 mov %edx,%ecx
d: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi)
f: 31 c0 xor %eax,%eax
11: 0f 01 ca clac
14: c3 ret
15: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
1c: 0f 01 cb stac
1f: 83 fa 40 cmp $0x40,%edx
22: 0f 82 70 ff ff ff jb 0xffffff98
28: 89 d1 mov %edx,%ecx
* 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction
2c: 31 c0 xor %eax,%eax
2e: 0f 01 ca clac
31: c3 ret
32: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
39: 00 00 00
3c: 89 d1 mov %edx,%ecx
3e: 83 .byte 0x83
3f: f8 clc