warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow ====================================================== WARNING: possible circular locking dependency detected 5.15.98-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor984/4054 is trying to acquire lock: ffff0000d38c0170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x3f0/0x4b4 fs/jbd2/transaction.c:895 but task is already holding lock: ffff0000d38bcbd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x154/0x648 fs/ext4/inode.c:6025 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&sbi->s_writepages_rwsem){++++}-{0:0}: percpu_down_write+0xd8/0x3b0 kernel/locking/percpu-rwsem.c:217 ext4_change_inode_journal_flag+0x154/0x648 fs/ext4/inode.c:6025 ext4_ioctl_setflags fs/ext4/ioctl.c:447 [inline] ext4_fileattr_set+0xb7c/0x12e0 fs/ext4/ioctl.c:762 vfs_fileattr_set+0x708/0xad0 fs/ioctl.c:700 do_vfs_ioctl+0x1634/0x2a38 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 -> #3 (mapping.invalidate_lock){++++}-{3:3}: down_write+0x110/0x260 kernel/locking/rwsem.c:1533 filemap_invalidate_lock include/linux/fs.h:832 [inline] ext4_setattr+0xa8c/0x1490 fs/ext4/inode.c:5443 notify_change+0xae4/0xd80 fs/attr.c:426 do_truncate+0x1bc/0x288 fs/open.c:65 do_sys_ftruncate+0x288/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 -> #2 (&sb->s_type->i_mutex_key#9){++++}-{3:3}: down_read+0xbc/0x11c kernel/locking/rwsem.c:1480 inode_lock_shared include/linux/fs.h:797 [inline] ext4_bmap+0x58/0x36c fs/ext4/inode.c:3159 bmap+0xa8/0xe8 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+0x63c/0xaa0 fs/jbd2/journal.c:2492 ext4_ioctl_checkpoint fs/ext4/ioctl.c:847 [inline] __ext4_ioctl fs/ext4/ioctl.c:1265 [inline] ext4_ioctl+0x3448/0x675c fs/ext4/ioctl.c:1277 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 -> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 mutex_lock_io_nested+0xcc/0x12c kernel/locking/mutex.c:777 jbd2_journal_flush+0x210/0xaa0 fs/jbd2/journal.c:2464 ext4_ioctl_checkpoint fs/ext4/ioctl.c:847 [inline] __ext4_ioctl fs/ext4/ioctl.c:1265 [inline] ext4_ioctl+0x3448/0x675c fs/ext4/ioctl.c:1277 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 -> #0 (&journal->j_barrier){+.+.}-{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:3787 [inline] __lock_acquire+0x32cc/0x7620 kernel/locking/lockdep.c:5011 lock_acquire+0x2b8/0x894 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 jbd2_journal_lock_updates+0x3f0/0x4b4 fs/jbd2/transaction.c:895 ext4_change_inode_journal_flag+0x15c/0x648 fs/ext4/inode.c:6026 ext4_ioctl_setflags fs/ext4/ioctl.c:447 [inline] ext4_fileattr_set+0xb7c/0x12e0 fs/ext4/ioctl.c:762 vfs_fileattr_set+0x708/0xad0 fs/ioctl.c:700 do_vfs_ioctl+0x1634/0x2a38 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 other info that might help us debug this: Chain exists of: &journal->j_barrier --> mapping.invalidate_lock --> &sbi->s_writepages_rwsem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->s_writepages_rwsem); lock(mapping.invalidate_lock); lock(&sbi->s_writepages_rwsem); lock(&journal->j_barrier); *** DEADLOCK *** 4 locks held by syz-executor984/4054: #0: ffff0000d38ba460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:421 #1: ffff0000dbdd67a0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000dbdd67a0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: vfs_fileattr_set+0x110/0xad0 fs/ioctl.c:685 #2: ffff0000dbdd6940 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #2: ffff0000dbdd6940 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0xf0/0x648 fs/ext4/inode.c:6017 #3: ffff0000d38bcbd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x154/0x648 fs/ext4/inode.c:6025 stack backtrace: CPU: 0 PID: 4054 Comm: syz-executor984 Not tainted 5.15.98-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011 check_noncircular+0x2cc/0x378 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:3787 [inline] __lock_acquire+0x32cc/0x7620 kernel/locking/lockdep.c:5011 lock_acquire+0x2b8/0x894 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 jbd2_journal_lock_updates+0x3f0/0x4b4 fs/jbd2/transaction.c:895 ext4_change_inode_journal_flag+0x15c/0x648 fs/ext4/inode.c:6026 ext4_ioctl_setflags fs/ext4/ioctl.c:447 [inline] ext4_fileattr_set+0xb7c/0x12e0 fs/ext4/ioctl.c:762 vfs_fileattr_set+0x708/0xad0 fs/ioctl.c:700 do_vfs_ioctl+0x1634/0x2a38 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584