====================================================== WARNING: possible circular locking dependency detected 6.1.0-syzkaller-13872-gb6bb9676f216 #0 Not tainted ------------------------------------------------------ syz-executor.1/9807 is trying to acquire lock: ffffc9000728b0f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline] ffffc9000728b0f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline] ffffc9000728b0f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_begin_r+0x293/0x10e0 fs/reiserfs/journal.c:3047 but task is already holding lock: ffff88801fbbe460 (sb_writers#24){.+.+}-{0:0}, at: reiserfs_ioctl+0x1a2/0x330 fs/reiserfs/ioctl.c:103 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_writers#24){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_write include/linux/fs.h:1886 [inline] mnt_want_write_file+0x92/0x590 fs/namespace.c:552 reiserfs_ioctl+0x1a2/0x330 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&sbi->lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747 reiserfs_write_lock_nested+0x69/0xe0 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+0x29d/0x10e0 fs/reiserfs/journal.c:3047 journal_begin+0x166/0x400 fs/reiserfs/journal.c:3255 reiserfs_fill_super+0x1c2f/0x2e90 fs/reiserfs/super.c:2104 mount_bdev+0x351/0x410 fs/super.c:1359 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 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:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747 reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline] lock_journal fs/reiserfs/journal.c:534 [inline] do_journal_begin_r+0x293/0x10e0 fs/reiserfs/journal.c:3047 journal_begin+0x166/0x400 fs/reiserfs/journal.c:3255 reiserfs_dirty_inode+0x103/0x260 fs/reiserfs/super.c:710 __mark_inode_dirty+0x247/0x11e0 fs/fs-writeback.c:2419 mark_inode_dirty include/linux/fs.h:2462 [inline] reiserfs_ioctl+0x2ca/0x330 fs/reiserfs/ioctl.c:111 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 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 --> &sbi->lock --> sb_writers#24 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#24); lock(&sbi->lock); lock(sb_writers#24); lock(&journal->j_mutex); *** DEADLOCK *** 1 lock held by syz-executor.1/9807: #0: ffff88801fbbe460 (sb_writers#24){.+.+}-{0:0}, at: reiserfs_ioctl+0x1a2/0x330 fs/reiserfs/ioctl.c:103 stack backtrace: CPU: 1 PID: 9807 Comm: syz-executor.1 Not tainted 6.1.0-syzkaller-13872-gb6bb9676f216 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747 reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline] lock_journal fs/reiserfs/journal.c:534 [inline] do_journal_begin_r+0x293/0x10e0 fs/reiserfs/journal.c:3047 journal_begin+0x166/0x400 fs/reiserfs/journal.c:3255 reiserfs_dirty_inode+0x103/0x260 fs/reiserfs/super.c:710 __mark_inode_dirty+0x247/0x11e0 fs/fs-writeback.c:2419 mark_inode_dirty include/linux/fs.h:2462 [inline] reiserfs_ioctl+0x2ca/0x330 fs/reiserfs/ioctl.c:111 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fdcafc8c0d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdcb09b9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fdcafdabf80 RCX: 00007fdcafc8c0d9 RDX: 0000000020000380 RSI: 0000000040087602 RDI: 0000000000000004 RBP: 00007fdcafce7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd63c46eff R14: 00007fdcb09b9300 R15: 0000000000022000