REISERFS (device loop4): Using tea hash to sort names REISERFS warning (device loop4): vs-13060 reiserfs_update_sd_size: stat data of object [1 2 0x0 SD] (nlink == 1) not found (pos 2) REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0 Not tainted ------------------------------------------------------ syz-executor.4/16840 is trying to acquire lock: ffff88802a250b20 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0xa5/0x120 mm/memory.c:5956 but task is already holding lock: ffff88801ec2b090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sbi->lock){+.+.}-{3:3}: lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x136/0xd60 kernel/locking/mutex.c:747 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xf2/0x240 fs/reiserfs/super.c:704 __mark_inode_dirty+0x305/0xda0 fs/fs-writeback.c:2452 generic_update_time fs/inode.c:1943 [inline] inode_update_time fs/inode.c:1956 [inline] __file_update_time fs/inode.c:2144 [inline] file_update_time+0x39b/0x3e0 fs/inode.c:2174 filemap_page_mkwrite+0x27b/0x640 mm/filemap.c:3587 do_page_mkwrite+0x197/0x470 mm/memory.c:2944 wp_page_shared mm/memory.c:3339 [inline] do_wp_page+0x1d07/0x4d40 mm/memory.c:3479 handle_pte_fault mm/memory.c:5055 [inline] __handle_mm_fault mm/memory.c:5180 [inline] handle_mm_fault+0x1b1c/0x6680 mm/memory.c:5345 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x456/0x870 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #1 (sb_pagefaults#4){.+.+}-{0:0}: lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 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+0x16f/0x640 mm/filemap.c:3586 do_page_mkwrite+0x197/0x470 mm/memory.c:2944 do_shared_fault mm/memory.c:4705 [inline] do_fault mm/memory.c:4767 [inline] do_pte_missing mm/memory.c:3731 [inline] handle_pte_fault mm/memory.c:5039 [inline] __handle_mm_fault mm/memory.c:5180 [inline] handle_mm_fault+0x22e6/0x6680 mm/memory.c:5345 do_user_addr_fault arch/x86/mm/fault.c:1415 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x2ad/0x870 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #0 (&mm->mmap_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x1909/0x5ab0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 __might_fault+0xc1/0x120 mm/memory.c:5956 reiserfs_ioctl+0x125/0x2f0 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b other info that might help us debug this: Chain exists of: &mm->mmap_lock --> sb_pagefaults#4 --> &sbi->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(sb_pagefaults#4); lock(&sbi->lock); rlock(&mm->mmap_lock); *** DEADLOCK *** 1 lock held by syz-executor.4/16840: #0: ffff88801ec2b090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 stack backtrace: CPU: 0 PID: 16840 Comm: syz-executor.4 Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x366/0x490 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+0x1909/0x5ab0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 __might_fault+0xc1/0x120 mm/memory.c:5956 reiserfs_ioctl+0x125/0x2f0 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fbb5167cd29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbb5233a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbb517abf80 RCX: 00007fbb5167cd29 RDX: 0000000020000000 RSI: 0000000080087601 RDI: 0000000000000005 RBP: 00007fbb516c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fbb517abf80 R15: 00007ffeb000cd28