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 6.7.0-rc1-syzkaller-00019-gc42d9eeef8e5 #0 Not tainted ------------------------------------------------------ syz-executor283/6575 is trying to acquire lock: ffff88801fff0090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27 but task is already holding lock: ffff88802131e510 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x380 mm/memory.c:2943 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (sb_pagefaults){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1635 [inline] sb_start_pagefault include/linux/fs.h:1739 [inline] filemap_page_mkwrite+0x174/0x7a0 mm/filemap.c:3577 do_page_mkwrite+0x17a/0x380 mm/memory.c:2943 do_shared_fault mm/memory.c:4704 [inline] do_fault mm/memory.c:4766 [inline] do_pte_missing mm/memory.c:3730 [inline] handle_pte_fault mm/memory.c:5038 [inline] __handle_mm_fault+0x2a3b/0x3d70 mm/memory.c:5179 handle_mm_fault+0x47a/0xa10 mm/memory.c:5344 do_user_addr_fault+0x30b/0x1000 arch/x86/mm/fault.c:1364 handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x5d/0xc0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #2 (&vma->vm_lock->lock){++++}-{3:3}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 vma_start_write include/linux/mm.h:716 [inline] vma_link+0x3fa/0x730 mm/mmap.c:404 insert_vm_struct+0x1e3/0x450 mm/mmap.c:3378 __bprm_mm_init fs/exec.c:281 [inline] bprm_mm_init fs/exec.c:383 [inline] alloc_bprm+0x4c5/0xb00 fs/exec.c:1532 kernel_execve+0xaf/0x4e0 fs/exec.c:1987 call_usermodehelper_exec_async+0x256/0x4c0 kernel/umh.c:110 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 -> #1 (&mm->mmap_lock){++++}-{3:3}: __might_fault mm/memory.c:5955 [inline] __might_fault+0x11f/0x1a0 mm/memory.c:5948 reiserfs_ioctl+0x1c4/0x2e0 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> #0 (&sbi->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2464/0x3b10 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5718 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747 reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xe6/0x270 fs/reiserfs/super.c:704 __mark_inode_dirty+0x1e0/0xd60 fs/fs-writeback.c:2452 generic_update_time+0xcf/0xf0 fs/inode.c:1941 inode_update_time fs/inode.c:1954 [inline] __file_update_time fs/inode.c:2142 [inline] file_update_time+0x12c/0x160 fs/inode.c:2172 filemap_page_mkwrite+0x295/0x7a0 mm/filemap.c:3578 do_page_mkwrite+0x17a/0x380 mm/memory.c:2943 do_shared_fault mm/memory.c:4704 [inline] do_fault mm/memory.c:4766 [inline] do_pte_missing mm/memory.c:3730 [inline] handle_pte_fault mm/memory.c:5038 [inline] __handle_mm_fault+0x2a3b/0x3d70 mm/memory.c:5179 handle_mm_fault+0x47a/0xa10 mm/memory.c:5344 do_user_addr_fault+0x30b/0x1000 arch/x86/mm/fault.c:1364 handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x5d/0xc0 arch/x86/mm/fault.c:1561 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 --> &vma->vm_lock->lock --> sb_pagefaults Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_pagefaults); lock(&vma->vm_lock->lock); lock(sb_pagefaults); lock(&sbi->lock); *** DEADLOCK *** 2 locks held by syz-executor283/6575: #0: ffff88801931c658 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:663 [inline] #0: ffff88801931c658 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1da/0x940 mm/memory.c:5500 #1: ffff88802131e510 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x380 mm/memory.c:2943 stack backtrace: CPU: 0 PID: 6575 Comm: syz-executor283 Not tainted 6.7.0-rc1-syzkaller-00019-gc42d9eeef8e5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x317/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2464/0x3b10 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5718 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747 reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xe6/0x270 fs/reiserfs/super.c:704 __mark_inode_dirty+0x1e0/0xd60 fs/fs-writeback.c:2452 generic_update_time+0xcf/0xf0 fs/inode.c:1941 inode_update_time fs/inode.c:1954 [inline] __file_update_time fs/inode.c:2142 [inline] file_update_time+0x12c/0x160 fs/inode.c:2172 filemap_page_mkwrite+0x295/0x7a0 mm/filemap.c:3578 do_page_mkwrite+0x17a/0x380 mm/memory.c:2943 do_shared_fault mm/memory.c:4704 [inline] do_fault mm/memory.c:4766 [inline] do_pte_missing mm/memory.c:3730 [inline] handle_pte_fault mm/memory.c:5038 [inline] __handle_mm_fault+0x2a3b/0x3d70 mm/memory.c:5179 handle_mm_fault+0x47a/0xa10 mm/memory.c:5344 do_user_addr_fault+0x30b/0x1000 arch/x86/mm/fault.c:1364 handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x5d/0xc0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f8d72123e00 Code: 4d 00 00 00 e8 f1 43 03 00 b9 5a 27 00 00 45 31 c0 31 c0 ba c0 00 00 20 be 9c ff ff ff bf 01 01 00 00 66 0f 6f 05 80 e5 07 00 <66> c7 04 25 d0 00 00 20 73 00 0f 29 04 25 c0 00 00 20 e8 b9 43 03 RSP: 002b:00007fff4ce9c8a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000275a RDX: 00000000200000c0 RSI: 00000000ffffff9c RDI: 0000000000000101 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007fff4ce9c8cc R13: 00000000000002db R14: 431bde82d7b634db R15: 00007fff4ce9c900