REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
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
6.1.53-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor235/3543 is trying to acquire lock:
ffff8880182ec090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27
but task is already holding lock:
ffff8880792b8558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2982
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (sb_pagefaults){.+.+}-{0:0}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
__sb_start_write include/linux/fs.h:1832 [inline]
sb_start_pagefault include/linux/fs.h:1936 [inline]
filemap_page_mkwrite+0x16a/0x630 mm/filemap.c:3421
do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2982
do_shared_fault mm/memory.c:4647 [inline]
do_fault mm/memory.c:4715 [inline]
handle_pte_fault mm/memory.c:4983 [inline]
__handle_mm_fault mm/memory.c:5125 [inline]
handle_mm_fault+0x22e8/0x5330 mm/memory.c:5246
do_user_addr_fault arch/x86/mm/fault.c:1380 [inline]
handle_page_fault arch/x86/mm/fault.c:1471 [inline]
exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:165
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:170 [inline]
_copy_to_iter+0x2c1/0xfe0 lib/iov_iter.c:527
copy_page_to_iter+0xac/0x170 lib/iov_iter.c:725
copy_folio_to_iter include/linux/uio.h:172 [inline]
filemap_read+0x273e/0x31d0 mm/filemap.c:2727
call_read_iter include/linux/fs.h:2199 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x7de/0xbe0 fs/read_write.c:470
ksys_read+0x19c/0x2c0 fs/read_write.c:613
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+0x63/0xcd
-> #1 (&mm->mmap_lock){++++}-{3:3}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
__might_fault+0xb2/0x110 mm/memory.c:5801
reiserfs_ioctl+0x11d/0x340 fs/reiserfs/ioctl.c:96
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
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+0x63/0xcd
-> #0 (&sbi->lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3824
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5048
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
__mutex_lock_common+0x1d4/0x2520 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27
reiserfs_dirty_inode+0xee/0x240 fs/reiserfs/super.c:704
__mark_inode_dirty+0x331/0xf80 fs/fs-writeback.c:2411
generic_update_time fs/inode.c:1901 [inline]
inode_update_time fs/inode.c:1914 [inline]
__file_update_time+0x221/0x240 fs/inode.c:2102
file_update_time+0x34c/0x3c0 fs/inode.c:2133
filemap_page_mkwrite+0x275/0x630 mm/filemap.c:3422
do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2982
do_shared_fault mm/memory.c:4647 [inline]
do_fault mm/memory.c:4715 [inline]
handle_pte_fault mm/memory.c:4983 [inline]
__handle_mm_fault mm/memory.c:5125 [inline]
handle_mm_fault+0x22e8/0x5330 mm/memory.c:5246
do_user_addr_fault arch/x86/mm/fault.c:1380 [inline]
handle_page_fault arch/x86/mm/fault.c:1471 [inline]
exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:165
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:170 [inline]
_copy_to_iter+0x2c1/0xfe0 lib/iov_iter.c:527
copy_page_to_iter+0xac/0x170 lib/iov_iter.c:725
copy_folio_to_iter include/linux/uio.h:172 [inline]
filemap_read+0x273e/0x31d0 mm/filemap.c:2727
call_read_iter include/linux/fs.h:2199 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x7de/0xbe0 fs/read_write.c:470
ksys_read+0x19c/0x2c0 fs/read_write.c:613
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+0x63/0xcd
other info that might help us debug this:
Chain exists of:
&sbi->lock --> &mm->mmap_lock --> sb_pagefaults
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(sb_pagefaults);
lock(&mm->mmap_lock);
lock(sb_pagefaults);
lock(&sbi->lock);
*** DEADLOCK ***
2 locks held by syz-executor235/3543:
#0: ffff88807d90d3d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807d90d3d8 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5274 [inline]
#0: ffff88807d90d3d8 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5336
#1: ffff8880792b8558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2982
stack backtrace:
CPU: 1 PID: 3543 Comm: syz-executor235 Not tainted 6.1.53-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3824
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5048
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661
__mutex_lock_common+0x1d4/0x2520 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27
reiserfs_dirty_inode+0xee/0x240 fs/reiserfs/super.c:704
__mark_inode_dirty+0x331/0xf80 fs/fs-writeback.c:2411
generic_update_time fs/inode.c:1901 [inline]
inode_update_time fs/inode.c:1914 [inline]
__file_update_time+0x221/0x240 fs/inode.c:2102
file_update_time+0x34c/0x3c0 fs/inode.c:2133
filemap_page_mkwrite+0x275/0x630 mm/filemap.c:3422
do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2982
do_shared_fault mm/memory.c:4647 [inline]
do_fault mm/memory.c:4715 [inline]
handle_pte_fault mm/memory.c:4983 [inline]
__handle_mm_fault mm/memory.c:5125 [inline]
handle_mm_fault+0x22e8/0x5330 mm/memory.c:5246
do_user_addr_fault arch/x86/mm/fault.c:1380 [inline]
handle_page_fault arch/x86/mm/fault.c:1471 [inline]
exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166
Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 <f3> a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc9000396f798 EFLAGS: 00050206
RAX: ffffffff8432fb01 RBX: 0000000000001000 RCX: 0000000000001000
RDX: 0000000000001000 RSI: ffff88807eba2000 RDI: 0000000020001740
RBP: ffffc9000396f8f8 R08: dffffc0000000000 R09: ffffed100fd74600
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807eba2000
R13: 1ffff9200072dfb3 R14: 0000000000001000 R15: dffffc0000000000
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:170 [inline]
_copy_to_iter+0x2c1/0xfe0 lib/iov_iter.c:527
copy_page_to_iter+0xac/0x170 lib/iov_iter.c:725
copy_folio_to_iter include/linux/uio.h:172 [inline]
filemap_read+0x273e/0x31d0 mm/filemap.c:2727
call_read_iter include/linux/fs.h:2199 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x7de/0xbe0 fs/read_write.c:470
ksys_read+0x19c/0x2c0 fs/read_write.c:613
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+0x63/0xcd
RIP: 0033:0x7ff25d5e1c79
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
RSP: 002b:00007ffcf2fa99c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007ff25d5ad896 RCX: 00007ff25d5e1c79
RDX: 0000000000002020 RSI: 0000000020001740 RDI: 0000000000000005
RBP: 00007ff25d656610 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffcf2fa9b98 R14: 0000000000000001 R15: 0000000000000001
----------------
Code disassembly (best guess):
0: ff c9 dec %ecx
2: 75 f2 jne 0xfffffff6
4: 89 d1 mov %edx,%ecx
6: c1 e9 03 shr $0x3,%ecx
9: 83 e2 07 and $0x7,%edx
c: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi)
f: 89 d1 mov %edx,%ecx
11: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi)
13: 31 c0 xor %eax,%eax
15: 0f 01 ca clac
18: c3 ret
19: 8d 0c ca lea (%rdx,%rcx,8),%ecx
1c: 89 ca mov %ecx,%edx
1e: eb 20 jmp 0x40
20: 0f 01 cb stac
23: 83 fa 40 cmp $0x40,%edx
26: 72 38 jb 0x60
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: 89 ca mov %ecx,%edx
34: eb 0a jmp 0x40
36: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
3d: 00 00 00