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 6.1.35-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor141/3852 is trying to acquire lock: ffffc900063de0f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline] ffffc900063de0f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline] ffffc900063de0f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_begin_r+0x34e/0x1020 fs/reiserfs/journal.c:3047 but task is already holding lock: ffff888019676558 (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: -> #3 (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 __put_user_nocheck_4+0x3/0x11 reiserfs_ioctl+0x14d/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 -> #2 (&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 -> #1 (&sbi->lock){+.+.}-{3:3}: 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_nested+0x5b/0xd0 fs/reiserfs/lock.c:78 reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:815 [inline] lock_journal fs/reiserfs/journal.c:534 [inline] do_journal_begin_r+0x359/0x1020 fs/reiserfs/journal.c:3047 journal_begin+0x148/0x350 fs/reiserfs/journal.c:3255 reiserfs_fill_super+0x184f/0x2620 fs/reiserfs/super.c:2104 mount_bdev+0x2c9/0x3f0 fs/super.c:1423 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1553 do_new_mount+0x28b/0xae0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568 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 (&journal->j_mutex){+.+.}-{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_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline] lock_journal fs/reiserfs/journal.c:534 [inline] do_journal_begin_r+0x34e/0x1020 fs/reiserfs/journal.c:3047 journal_begin+0x148/0x350 fs/reiserfs/journal.c:3255 reiserfs_dirty_inode+0x11c/0x240 fs/reiserfs/super.c:710 __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 __put_user_nocheck_4+0x3/0x11 reiserfs_ioctl+0x14d/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 other info that might help us debug this: Chain exists of: &journal->j_mutex --> &mm->mmap_lock#2 --> sb_pagefaults Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_pagefaults); lock(&mm->mmap_lock#2); lock(sb_pagefaults); lock(&journal->j_mutex); *** DEADLOCK *** 2 locks held by syz-executor141/3852: #0: ffff8880759435d8 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff8880759435d8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1379 [inline] #0: ffff8880759435d8 (&mm->mmap_lock#2){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1519 [inline] #0: ffff8880759435d8 (&mm->mmap_lock#2){++++}-{3:3}, at: exc_page_fault+0x46a/0x790 arch/x86/mm/fault.c:1575 #1: ffff888019676558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2973 stack backtrace: CPU: 1 PID: 3852 Comm: syz-executor141 Not tainted 6.1.35-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_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline] lock_journal fs/reiserfs/journal.c:534 [inline] do_journal_begin_r+0x34e/0x1020 fs/reiserfs/journal.c:3047 journal_begin+0x148/0x350 fs/reiserfs/journal.c:3255 reiserfs_dirty_inode+0x11c/0x240 fs/reiserfs/super.c:710 __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: 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 0f 1f 44 00 00 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 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f RSP: 0018:ffffc9000632feb0 EFLAGS: 00050297 RAX: 0000000000000002 RBX: 00007fffffffeffd RCX: 0000000020000000 RDX: 0000000000000001 RSI: ffffffff8aebe320 RDI: ffffffff8b3ccb60 RBP: 1ffff1100de1de4b R08: dffffc0000000000 R09: fffffbfff1ca654e R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000020000000 R13: ffff88806f0ef698 R14: ffff88806f0ef258 R15: ffff888027298f00 reiserfs_ioctl+0x14d/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 RIP: 0033:0x7fb8f29869d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffea26a4658 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000008d44b RCX: 00007fb8f29869d9 RDX: 0000000020000000 RSI: 0000000080087601 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffea26a468c R13: 00007ffea26a46c0 R14: 00007ffea26a46a0 R15: 0000000000000088 ---------------- 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 retq 13: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 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 retq 32: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 38: 48 rex.W 39: bb f9 ef ff ff mov $0xffffeff9,%ebx 3e: ff (bad) 3f: 7f .byte 0x7f