REISERFS (device loop0): using 3.5.x disk format
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
======================================================
WARNING: possible circular locking dependency detected
6.3.0-rc4-syzkaller-00034-gfcd476ea6a88 #0 Not tainted
------------------------------------------------------
syz-executor228/5099 is trying to acquire lock:
ffff888021310090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27
but task is already holding lock:
ffff88802b3a8558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2925
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (sb_pagefaults){.+.+}-{0:0}:
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
__sb_start_write include/linux/fs.h:1477 [inline]
sb_start_pagefault include/linux/fs.h:1581 [inline]
filemap_page_mkwrite+0x16e/0x780 mm/filemap.c:3569
do_page_mkwrite+0x19b/0x680 mm/memory.c:2925
wp_page_shared mm/memory.c:3274 [inline]
do_wp_page+0x356/0x3610 mm/memory.c:3356
handle_pte_fault mm/memory.c:4927 [inline]
__handle_mm_fault+0x19a1/0x3e60 mm/memory.c:5051
handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5197
do_user_addr_fault+0x475/0x1230 arch/x86/mm/fault.c:1407
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
-> #1 (&mm->mmap_lock){++++}-{3:3}:
__might_fault mm/memory.c:5625 [inline]
__might_fault+0x10c/0x180 mm/memory.c:5618
reiserfs_ioctl+0x1d2/0x330 fs/reiserfs/ioctl.c:96
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
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
-> #0 (&sbi->lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056
lock_acquire kernel/locking/lockdep.c:5669 [inline]
lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747
reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27
reiserfs_dirty_inode+0xd2/0x260 fs/reiserfs/super.c:704
__mark_inode_dirty+0x1e0/0xd60 fs/fs-writeback.c:2421
generic_update_time+0x21b/0x2b0 fs/inode.c:1860
inode_update_time fs/inode.c:1873 [inline]
__file_update_time fs/inode.c:2058 [inline]
file_update_time+0x224/0x270 fs/inode.c:2089
filemap_page_mkwrite+0x280/0x780 mm/filemap.c:3570
do_page_mkwrite+0x19b/0x680 mm/memory.c:2925
wp_page_shared mm/memory.c:3274 [inline]
do_wp_page+0x356/0x3610 mm/memory.c:3356
handle_pte_fault mm/memory.c:4927 [inline]
__handle_mm_fault+0x19a1/0x3e60 mm/memory.c:5051
handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5197
do_user_addr_fault+0x475/0x1230 arch/x86/mm/fault.c:1407
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
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-executor228/5099:
#0: ffff88807d700ad8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807d700ad8 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x276/0x1230 arch/x86/mm/fault.c:1348
#1: ffff88802b3a8558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2925
stack backtrace:
CPU: 0 PID: 5099 Comm: syz-executor228 Not tainted 6.3.0-rc4-syzkaller-00034-gfcd476ea6a88 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056
lock_acquire kernel/locking/lockdep.c:5669 [inline]
lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747
reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27
reiserfs_dirty_inode+0xd2/0x260 fs/reiserfs/super.c:704
__mark_inode_dirty+0x1e0/0xd60 fs/fs-writeback.c:2421
generic_update_time+0x21b/0x2b0 fs/inode.c:1860
inode_update_time fs/inode.c:1873 [inline]
__file_update_time fs/inode.c:2058 [inline]
file_update_time+0x224/0x270 fs/inode.c:2089
filemap_page_mkwrite+0x280/0x780 mm/filemap.c:3570
do_page_mkwrite+0x19b/0x680 mm/memory.c:2925
wp_page_shared mm/memory.c:3274 [inline]
do_wp_page+0x356/0x3610 mm/memory.c:3356
handle_pte_fault mm/memory.c:4927 [inline]
__handle_mm_fault+0x19a1/0x3e60 mm/memory.c:5051
handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5197
do_user_addr_fault+0x475/0x1230 arch/x86/mm/fault.c:1407
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fce2e0f94e9
Code: 00 e9 3a fe ff ff c7 04 25 40 00 00 20 2e 2f 62 75 66 c7 04 25 44 00 00 20 73 00 e9 76 fe ff ff 48 b8 2f 64 65 76 2f 63 75 73 <66> c7 04 25 48 02 00 20 65 00 48 89 04 25 40 02 00 20 e9 0d ff ff
RSP: 002b:00007ffd8ddd3730 EFLAGS: 00010246
RAX: 7375632f7665642f RBX: 0000000000009783 RCX: 00007fce2e13beb9
RDX: fa0b8d5febad6a06 RSI: 0000000000000000 RDI: 00005555569ba2b0
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000004002011 R11: 0000000000000246 R12: 00007ffd8ddd375c
R13: 00007ffd8ddd3790 R14: 00007ffd8ddd3770 R15: 000000000000000c
</TASK>