======================================================
WARNING: possible circular locking dependency detected
6.3.0-rc1-syzkaller-gfe15c26ee26e #0 Not tainted
------------------------------------------------------
syz-executor.3/7191 is trying to acquire lock:
ffff0000c0548400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
ffff0000c0548400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_bmap+0x58/0x35c fs/ext4/inode.c:3242
but task is already holding lock:
ffff0000d940c3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x28c/0xa60 fs/jbd2/journal.c:2473
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&journal->j_checkpoint_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
mutex_lock_io_nested+0x6c/0x88 kernel/locking/mutex.c:833
jbd2_journal_flush+0x210/0xa60 fs/jbd2/journal.c:2463
ext4_change_inode_journal_flag+0x190/0x618 fs/ext4/inode.c:6169
ext4_ioctl_setflags fs/ext4/ioctl.c:684 [inline]
ext4_fileattr_set+0xb5c/0x12d0 fs/ext4/ioctl.c:1001
vfs_fileattr_set+0x70c/0xad4 fs/ioctl.c:696
do_vfs_ioctl+0x14cc/0x26f8
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
-> #2 (&journal->j_barrier){+.+.}-{3:3}:
__mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
jbd2_journal_lock_updates+0x260/0x324 fs/jbd2/transaction.c:904
ext4_change_inode_journal_flag+0x15c/0x618 fs/ext4/inode.c:6156
ext4_ioctl_setflags fs/ext4/ioctl.c:684 [inline]
ext4_fileattr_set+0xb5c/0x12d0 fs/ext4/ioctl.c:1001
vfs_fileattr_set+0x70c/0xad4 fs/ioctl.c:696
do_vfs_ioctl+0x14cc/0x26f8
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
-> #1 (&sbi->s_writepages_rwsem){++++}-{0:0}:
percpu_down_write+0x78/0x2e0 kernel/locking/percpu-rwsem.c:227
ext4_ind_migrate+0x174/0x6e4 fs/ext4/migrate.c:624
ext4_ioctl_setflags fs/ext4/ioctl.c:693 [inline]
ext4_fileattr_set+0xbd0/0x12d0 fs/ext4/ioctl.c:1001
vfs_fileattr_set+0x70c/0xad4 fs/ioctl.c:696
do_vfs_ioctl+0x14cc/0x26f8
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
-> #0 (&sb->s_type->i_mutex_key#8){++++}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056
lock_acquire+0x2f0/0x8c8 kernel/locking/lockdep.c:5669
down_read+0x5c/0x78 kernel/locking/rwsem.c:1520
inode_lock_shared include/linux/fs.h:768 [inline]
ext4_bmap+0x58/0x35c fs/ext4/inode.c:3242
bmap+0xa8/0xe8 fs/inode.c:1799
jbd2_journal_bmap fs/jbd2/journal.c:976 [inline]
__jbd2_journal_erase fs/jbd2/journal.c:1788 [inline]
jbd2_journal_flush+0x4c0/0xa60 fs/jbd2/journal.c:2491
ext4_ioctl_checkpoint fs/ext4/ioctl.c:1079 [inline]
__ext4_ioctl fs/ext4/ioctl.c:1587 [inline]
ext4_ioctl+0x3860/0x6f58 fs/ext4/ioctl.c:1607
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
other info that might help us debug this:
Chain exists of:
&sb->s_type->i_mutex_key#8 --> &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#8);
*** DEADLOCK ***
2 locks held by syz-executor.3/7191:
#0: ffff0000d940c170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x260/0x324 fs/jbd2/transaction.c:904
#1: ffff0000d940c3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x28c/0xa60 fs/jbd2/journal.c:2473
stack backtrace:
CPU: 0 PID: 7191 Comm: syz-executor.3 Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
dump_stack+0x1c/0x28 lib/dump_stack.c:113
print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2056
check_noncircular+0x2cc/0x378 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 kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056
lock_acquire+0x2f0/0x8c8 kernel/locking/lockdep.c:5669
down_read+0x5c/0x78 kernel/locking/rwsem.c:1520
inode_lock_shared include/linux/fs.h:768 [inline]
ext4_bmap+0x58/0x35c fs/ext4/inode.c:3242
bmap+0xa8/0xe8 fs/inode.c:1799
jbd2_journal_bmap fs/jbd2/journal.c:976 [inline]
__jbd2_journal_erase fs/jbd2/journal.c:1788 [inline]
jbd2_journal_flush+0x4c0/0xa60 fs/jbd2/journal.c:2491
ext4_ioctl_checkpoint fs/ext4/ioctl.c:1079 [inline]
__ext4_ioctl fs/ext4/ioctl.c:1587 [inline]
ext4_ioctl+0x3860/0x6f58 fs/ext4/ioctl.c:1607
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591