====================================================== WARNING: possible circular locking dependency detected 5.15.98-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/3577 is trying to acquire lock: ffff88801ca683f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] ffff88801ca683f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_bmap+0x4b/0x410 fs/ext4/inode.c:3159 but task is already holding lock: ffff88814b0d23f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x31c/0xc90 fs/jbd2/journal.c:2474 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+0x1f6/0x560 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:2464 ext4_change_inode_journal_flag+0x1de/0x6e0 fs/ext4/inode.c:6039 ext4_ioctl_setflags fs/ext4/ioctl.c:447 [inline] ext4_fileattr_set+0xe6e/0x17d0 fs/ext4/ioctl.c:762 vfs_fileattr_set+0x8ee/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 -> #2 (&journal->j_barrier){+.+.}-{3:3}: lock_acquire+0x1f6/0x560 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:6026 ext4_ioctl_setflags fs/ext4/ioctl.c:447 [inline] ext4_fileattr_set+0xe6e/0x17d0 fs/ext4/ioctl.c:762 vfs_fileattr_set+0x8ee/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+0x1f6/0x560 kernel/locking/lockdep.c:5622 percpu_down_read+0x46/0x190 include/linux/percpu-rwsem.h:51 ext4_writepages+0x1f6/0x3eb0 fs/ext4/inode.c:2687 do_writepages+0x481/0x730 mm/page-writeback.c:2364 filemap_fdatawrite_wbc+0x1d6/0x230 mm/filemap.c:400 __filemap_fdatawrite_range mm/filemap.c:433 [inline] filemap_write_and_wait_range+0x19e/0x280 mm/filemap.c:704 __iomap_dio_rw+0x897/0x1f40 fs/iomap/direct-io.c:557 iomap_dio_rw+0x38/0x80 fs/iomap/direct-io.c:672 ext4_dio_write_iter fs/ext4/file.c:574 [inline] ext4_file_write_iter+0x15af/0x1990 fs/ext4/file.c:685 call_write_iter include/linux/fs.h:2101 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacf/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 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+0x1f6/0x560 kernel/locking/lockdep.c:5622 down_read+0x3b/0x50 kernel/locking/rwsem.c:1480 inode_lock_shared include/linux/fs.h:797 [inline] ext4_bmap+0x4b/0x410 fs/ext4/inode.c:3159 bmap+0xa1/0xd0 fs/inode.c:1714 jbd2_journal_bmap fs/jbd2/journal.c:978 [inline] __jbd2_journal_erase fs/jbd2/journal.c:1786 [inline] jbd2_journal_flush+0x7a2/0xc90 fs/jbd2/journal.c:2492 ext4_ioctl_checkpoint fs/ext4/ioctl.c:847 [inline] __ext4_ioctl fs/ext4/ioctl.c:1265 [inline] ext4_ioctl+0x335b/0x5db0 fs/ext4/ioctl.c:1277 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-executor.5/3577: #0: ffff88814b0d2170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x4a9/0x580 fs/jbd2/transaction.c:895 #1: ffff88814b0d23f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x31c/0xc90 fs/jbd2/journal.c:2474 stack backtrace: CPU: 0 PID: 3577 Comm: syz-executor.5 Not tainted 5.15.98-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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+0x1f6/0x560 kernel/locking/lockdep.c:5622 down_read+0x3b/0x50 kernel/locking/rwsem.c:1480 inode_lock_shared include/linux/fs.h:797 [inline] ext4_bmap+0x4b/0x410 fs/ext4/inode.c:3159 bmap+0xa1/0xd0 fs/inode.c:1714 jbd2_journal_bmap fs/jbd2/journal.c:978 [inline] __jbd2_journal_erase fs/jbd2/journal.c:1786 [inline] jbd2_journal_flush+0x7a2/0xc90 fs/jbd2/journal.c:2492 ext4_ioctl_checkpoint fs/ext4/ioctl.c:847 [inline] __ext4_ioctl fs/ext4/ioctl.c:1265 [inline] ext4_ioctl+0x335b/0x5db0 fs/ext4/ioctl.c:1277 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: 0033:0x7fdb587580f9 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:00007fdb56ca9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fdb58878050 RCX: 00007fdb587580f9 RDX: 00000000200005c0 RSI: 000000004004662b RDI: 0000000000000006 RBP: 00007fdb587b3ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe8c2e8a2f R14: 00007fdb56ca9300 R15: 0000000000022000