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 5.15.181-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/4871 is trying to acquire lock: ffff888077882090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78 but task is already holding lock: ffff88807357cd60 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] ffff88807357cd60 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x190/0x930 mm/readahead.c:195 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (mapping.invalidate_lock#3){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] page_cache_ra_unbounded+0x190/0x930 mm/readahead.c:195 do_sync_mmap_readahead+0x588/0x700 mm/filemap.c:2996 filemap_fault+0x70d/0x13b0 mm/filemap.c:3089 __do_fault+0x141/0x330 mm/memory.c:3928 do_shared_fault mm/memory.c:4318 [inline] do_fault mm/memory.c:4396 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1cdd/0x43c0 mm/memory.c:4883 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357 handle_page_fault arch/x86/mm/fault.c:1445 [inline] exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 __put_user_nocheck_4+0x3/0x11 reiserfs_ioctl+0x161/0x330 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&sbi->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78 reiserfs_cond_resched fs/reiserfs/reiserfs.h:849 [inline] search_by_key+0x938/0x4390 fs/reiserfs/stree.c:712 search_for_position_by_key+0x104/0xf20 fs/reiserfs/stree.c:874 _get_block_create_0+0x1f6/0x1c70 fs/reiserfs/inode.c:305 reiserfs_get_block+0x33a/0x4100 fs/reiserfs/inode.c:703 do_mpage_readpage+0x820/0x1e30 fs/mpage.c:231 mpage_readahead+0x3a6/0x8a0 fs/mpage.c:389 read_pages+0x165/0x920 mm/readahead.c:130 page_cache_ra_unbounded+0x830/0x930 mm/readahead.c:239 do_sync_mmap_readahead+0x588/0x700 mm/filemap.c:2996 filemap_fault+0x70d/0x13b0 mm/filemap.c:3089 __do_fault+0x141/0x330 mm/memory.c:3928 do_shared_fault mm/memory.c:4318 [inline] do_fault mm/memory.c:4396 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1cdd/0x43c0 mm/memory.c:4883 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357 handle_page_fault arch/x86/mm/fault.c:1445 [inline] exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 __put_user_nocheck_4+0x3/0x11 reiserfs_ioctl+0x161/0x330 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(mapping.invalidate_lock#3); lock(&sbi->lock); lock(mapping.invalidate_lock#3); lock(&sbi->lock); *** DEADLOCK *** 1 lock held by syz-executor.0/4871: #0: ffff88807357cd60 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #0: ffff88807357cd60 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x190/0x930 mm/readahead.c:195 stack backtrace: CPU: 0 PID: 4871 Comm: syz-executor.0 Not tainted 5.15.181-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78 reiserfs_cond_resched fs/reiserfs/reiserfs.h:849 [inline] search_by_key+0x938/0x4390 fs/reiserfs/stree.c:712 search_for_position_by_key+0x104/0xf20 fs/reiserfs/stree.c:874 _get_block_create_0+0x1f6/0x1c70 fs/reiserfs/inode.c:305 reiserfs_get_block+0x33a/0x4100 fs/reiserfs/inode.c:703 do_mpage_readpage+0x820/0x1e30 fs/mpage.c:231 mpage_readahead+0x3a6/0x8a0 fs/mpage.c:389 read_pages+0x165/0x920 mm/readahead.c:130 page_cache_ra_unbounded+0x830/0x930 mm/readahead.c:239 do_sync_mmap_readahead+0x588/0x700 mm/filemap.c:2996 filemap_fault+0x70d/0x13b0 mm/filemap.c:3089 __do_fault+0x141/0x330 mm/memory.c:3928 do_shared_fault mm/memory.c:4318 [inline] do_fault mm/memory.c:4396 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1cdd/0x43c0 mm/memory.c:4883 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357 handle_page_fault arch/x86/mm/fault.c:1445 [inline] exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0010:__put_user_nocheck_4+0x3/0x11 Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 90 90 90 90 90 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 34 0f 01 cb <89> 01 31 c9 0f 01 ca c3 90 90 90 90 90 90 48 bb f9 ef ff ff ff 7f RSP: 0018:ffffc90002edfea0 EFLAGS: 00050297 RAX: 0000000000000002 RBX: 00007fffffffeffd RCX: 0000000020000000 RDX: 0000000000000001 RSI: ffffffff8a0b2260 RDI: ffffffff8a59a2c0 RBP: 0000000080087601 R08: dffffc0000000000 R09: fffffbfff1ad155e R10: fffffbfff1ad155e R11: 1ffffffff1ad155d R12: 1ffff1100e6af953 R13: dffffc0000000000 R14: ffff88807357ca98 R15: ffff888023006500 reiserfs_ioctl+0x161/0x330 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f9e85e63b29 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:00007f9e851e50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9e85f82f80 RCX: 00007f9e85e63b29 RDX: 0000000020000000 RSI: 0000000080087601 RDI: 0000000000000005 RBP: 00007f9e85eaf47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f9e85f82f80 R15: 00007ffe46ad0888 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 39 d9 cmp %rbx,%rcx 5: 73 54 jae 0x5b 7: 0f 01 cb stac a: 66 89 01 mov %ax,(%rcx) d: 31 c9 xor %ecx,%ecx f: 0f 01 ca clac 12: c3 ret 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 48 bb fd ef ff ff ff movabs $0x7fffffffeffd,%rbx 1f: 7f 00 00 22: 48 39 d9 cmp %rbx,%rcx 25: 73 34 jae 0x5b 27: 0f 01 cb stac * 2a: 89 01 mov %eax,(%rcx) <-- trapping instruction 2c: 31 c9 xor %ecx,%ecx 2e: 0f 01 ca clac 31: c3 ret 32: 90 nop 33: 90 nop 34: 90 nop 35: 90 nop 36: 90 nop 37: 90 nop 38: 48 rex.W 39: bb f9 ef ff ff mov $0xffffeff9,%ebx 3e: ff (bad) 3f: 7f .byte 0x7f