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 (device loop0): using 3.5.x disk format REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 6.1.34-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor764/3652 is trying to acquire lock: ffff88807f6d4090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27 but task is already holding lock: ffff88807e124558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2973 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:5669 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:2973 do_shared_fault mm/memory.c:4628 [inline] do_fault mm/memory.c:4696 [inline] handle_pte_fault mm/memory.c:4964 [inline] __handle_mm_fault mm/memory.c:5106 [inline] handle_mm_fault+0x22e8/0x5330 mm/memory.c:5227 do_user_addr_fault arch/x86/mm/fault.c:1428 [inline] handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x58d/0x790 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 -> #1 (&mm->mmap_lock#2){++++}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __might_fault+0xb2/0x110 mm/memory.c:5655 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:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __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:1859 [inline] inode_update_time fs/inode.c:1872 [inline] __file_update_time+0x221/0x240 fs/inode.c:2060 file_update_time+0x34c/0x3c0 fs/inode.c:2091 filemap_page_mkwrite+0x275/0x630 mm/filemap.c:3422 do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2973 do_shared_fault mm/memory.c:4628 [inline] do_fault mm/memory.c:4696 [inline] handle_pte_fault mm/memory.c:4964 [inline] __handle_mm_fault mm/memory.c:5106 [inline] handle_mm_fault+0x22e8/0x5330 mm/memory.c:5227 do_user_addr_fault arch/x86/mm/fault.c:1428 [inline] handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x58d/0x790 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 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 *** 2 locks held by syz-executor764/3652: #0: ffff88807c9662d8 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff88807c9662d8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1379 [inline] #0: ffff88807c9662d8 (&mm->mmap_lock#2){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1519 [inline] #0: ffff88807c9662d8 (&mm->mmap_lock#2){++++}-{3:3}, at: exc_page_fault+0x46a/0x790 arch/x86/mm/fault.c:1575 #1: ffff88807e124558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2973 stack backtrace: CPU: 1 PID: 3652 Comm: syz-executor764 Not tainted 6.1.34-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __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:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __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:1859 [inline] inode_update_time fs/inode.c:1872 [inline] __file_update_time+0x221/0x240 fs/inode.c:2060 file_update_time+0x34c/0x3c0 fs/inode.c:2091 filemap_page_mkwrite+0x275/0x630 mm/filemap.c:3422 do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2973 do_shared_fault mm/memory.c:4628 [inline] do_fault mm/memory.c:4696 [inline] handle_pte_fault mm/memory.c:4964 [inline] __handle_mm_fault mm/memory.c:5106 [inline] handle_mm_fault+0x22e8/0x5330 mm/memory.c:5227 do_user_addr_fault arch/x86/mm/fault.c:1428 [inline] handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x58d/0x790 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f5f27a0b525 Code: 09 00 00 00 e8 fc 24 04 00 48 8b 35 35 5c 0b 00 ba ff 7f 00 02 31 c0 bf 4d 00 00 00 e8 e4 24 04 00 31 c9 ba 42 da 14 00 31 c0 04 25 c0 00 00 20 2e 2f 62 75 be c0 00 00 20 bf 02 00 00 00 66 RSP: 002b:00007ffef9e48bb0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000000947ed RCX: 0000000000000000 RDX: 000000000014da42 RSI: 0000000002007fff RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 00007ffef9e48bdc R13: 00007ffef9e48c10 R14: 00007ffef9e48bf0 R15: 0000000000000021