====================================================== WARNING: possible circular locking dependency detected 5.15.117-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor287/3500 is trying to acquire lock: ffff8881408983f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] ffff8881408983f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_bmap+0x4b/0x410 fs/ext4/inode.c:3162 but task is already holding lock: ffff8880247923f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x31c/0xc90 fs/jbd2/journal.c:2476 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 mutex_lock_io_nested+0x45/0x60 kernel/locking/mutex.c:777 jbd2_journal_flush+0x290/0xc90 fs/jbd2/journal.c:2466 ext4_ioctl_checkpoint fs/ext4/ioctl.c:846 [inline] __ext4_ioctl fs/ext4/ioctl.c:1264 [inline] ext4_ioctl+0x322b/0x5b60 fs/ext4/ioctl.c:1273 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 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+0x61/0xcb -> #2 (&journal->j_barrier){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 jbd2_journal_lock_updates+0x4a9/0x580 fs/jbd2/transaction.c:895 ext4_change_inode_journal_flag+0x1a8/0x6e0 fs/ext4/inode.c:6051 ext4_ioctl_setflags fs/ext4/ioctl.c:448 [inline] ext4_fileattr_set+0xdf4/0x1750 fs/ext4/ioctl.c:762 vfs_fileattr_set+0x8f3/0xd30 fs/ioctl.c:700 ioctl_setflags fs/ioctl.c:732 [inline] do_vfs_ioctl+0x1d85/0x2b70 fs/ioctl.c:843 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl+0x81/0x160 fs/ioctl.c:860 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+0x61/0xcb -> #1 (&sbi->s_writepages_rwsem){++++}-{0:0}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 percpu_down_write+0x52/0x2d0 kernel/locking/percpu-rwsem.c:217 ext4_ind_migrate+0x254/0x760 fs/ext4/migrate.c:625 ext4_ioctl_setflags fs/ext4/ioctl.c:457 [inline] ext4_fileattr_set+0xe8b/0x1750 fs/ext4/ioctl.c:762 vfs_fileattr_set+0x8f3/0xd30 fs/ioctl.c:700 ioctl_setflags fs/ioctl.c:732 [inline] do_vfs_ioctl+0x1d85/0x2b70 fs/ioctl.c:843 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl+0x81/0x160 fs/ioctl.c:860 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+0x61/0xcb -> #0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_read+0x45/0x2e0 kernel/locking/rwsem.c:1488 inode_lock_shared include/linux/fs.h:797 [inline] ext4_bmap+0x4b/0x410 fs/ext4/inode.c:3162 bmap+0xa1/0xd0 fs/inode.c:1714 jbd2_journal_bmap fs/jbd2/journal.c:980 [inline] __jbd2_journal_erase fs/jbd2/journal.c:1788 [inline] jbd2_journal_flush+0x7a2/0xc90 fs/jbd2/journal.c:2494 ext4_ioctl_checkpoint fs/ext4/ioctl.c:846 [inline] __ext4_ioctl fs/ext4/ioctl.c:1264 [inline] ext4_ioctl+0x322b/0x5b60 fs/ext4/ioctl.c:1273 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 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+0x61/0xcb other info that might help us debug this: Chain exists of: &sb->s_type->i_mutex_key#9 --> &journal->j_barrier --> &journal->j_checkpoint_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_checkpoint_mutex); lock(&journal->j_barrier); lock(&journal->j_checkpoint_mutex); lock(&sb->s_type->i_mutex_key#9); *** DEADLOCK *** 2 locks held by syz-executor287/3500: #0: ffff888024792170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x4a9/0x580 fs/jbd2/transaction.c:895 #1: ffff8880247923f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x31c/0xc90 fs/jbd2/journal.c:2476 stack backtrace: CPU: 1 PID: 3500 Comm: syz-executor287 Not tainted 5.15.117-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+0x2f8/0x3b0 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+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_read+0x45/0x2e0 kernel/locking/rwsem.c:1488 inode_lock_shared include/linux/fs.h:797 [inline] ext4_bmap+0x4b/0x410 fs/ext4/inode.c:3162 bmap+0xa1/0xd0 fs/inode.c:1714 jbd2_journal_bmap fs/jbd2/journal.c:980 [inline] __jbd2_journal_erase fs/jbd2/journal.c:1788 [inline] jbd2_journal_flush+0x7a2/0xc90 fs/jbd2/journal.c:2494 ext4_ioctl_checkpoint fs/ext4/ioctl.c:846 [inline] __ext4_ioctl fs/ext4/ioctl.c:1264 [inline] ext4_ioctl+0x322b/0x5b60 fs/ext4/ioctl.c:1273 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 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+0x61/0xcb RIP: 0033:0x7fcc56510059 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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:00007ffdcf8acec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcc56510059 RDX: 00000000200005c0 RSI: 000000004004662b RDI: 0000000000000004 RBP: 00007fcc564d4040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc564d40d0 R13: 0000000000000000 R14: 0000000