======================================================
WARNING: possible circular locking dependency detected
6.6.0-rc7-syzkaller-00041-g611da07b89fd #0 Not tainted
------------------------------------------------------
syz-executor.4/15290 is trying to acquire lock:
ffffffff8d0648e8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1b0/0x4c0 block/bdev.c:508
but task is already holding lock:
ffff88801acc94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
ffff88801acc94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x660 block/fops.c:773
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (mapping.invalidate_lock#2){++++}-{3:3}:
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1520
filemap_invalidate_lock_shared include/linux/fs.h:857 [inline]
page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:225
page_cache_sync_readahead include/linux/pagemap.h:1293 [inline]
ext4_readdir+0xe36/0x37e0 fs/ext4/dir.c:194
iterate_dir+0x1cd/0x580 fs/readdir.c:106
__do_sys_getdents64 fs/readdir.c:405 [inline]
__se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:390
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #3 (&type->i_mutex_dir_key#3){++++}-{3:3}:
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1520
inode_lock_shared include/linux/fs.h:812 [inline]
lookup_slow fs/namei.c:1710 [inline]
lookup_one_unlocked+0x193/0x280 fs/namei.c:2807
lookup_one_positive_unlocked fs/namei.c:2836 [inline]
lookup_positive_unlocked+0x2b/0xb0 fs/namei.c:2876
dquot_quota_on_mount+0x5a/0xe0 fs/quota/dquot.c:2532
ext4_quota_on_mount fs/ext4/orphan.c:316 [inline]
ext4_orphan_cleanup+0x6d2/0x1400 fs/ext4/orphan.c:444
__ext4_fill_super fs/ext4/super.c:5582 [inline]
ext4_fill_super+0x641a/0x6d10 fs/ext4/super.c:5703
get_tree_bdev+0x416/0x5b0 fs/super.c:1577
vfs_get_tree+0x8c/0x280 fs/super.c:1750
do_new_mount+0x28f/0xae0 fs/namespace.c:3335
do_mount fs/namespace.c:3675 [inline]
__do_sys_mount fs/namespace.c:3884 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #2 (&type->s_umount_key#30){++++}-{3:3}:
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1520
__super_lock fs/super.c:58 [inline]
super_lock+0x176/0x390 fs/super.c:117
super_lock_shared fs/super.c:146 [inline]
super_lock_shared_active fs/super.c:1431 [inline]
fs_bdev_sync+0xa5/0x170 fs/super.c:1466
blkdev_flushbuf block/ioctl.c:372 [inline]
blkdev_common_ioctl+0x889/0x2860 block/ioctl.c:502
blkdev_ioctl+0x520/0x730 block/ioctl.c:624
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #1 (&bdev->bd_holder_lock){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x136/0xd60 kernel/locking/mutex.c:747
bd_finish_claiming+0x231/0x3f0 block/bdev.c:566
blkdev_get_by_dev+0x481/0x620 block/bdev.c:799
setup_bdev_super+0x5d/0x600 fs/super.c:1484
mount_bdev+0x1e0/0x300 fs/super.c:1626
legacy_get_tree+0xef/0x190 fs/fs_context.c:662
vfs_get_tree+0x8c/0x280 fs/super.c:1750
do_new_mount+0x28f/0xae0 fs/namespace.c:3335
init_mount+0xd4/0x130 fs/init.c:25
do_mount_root+0x98/0x230 init/do_mounts.c:166
mount_root_generic+0x193/0x3b0 init/do_mounts.c:205
prepare_namespace+0xc2/0x100 init/do_mounts.c:489
kernel_init_freeable+0x46a/0x5c0 init/main.c:1560
kernel_init+0x1d/0x2a0 init/main.c:1437
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
-> #0 (bdev_lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3868 [inline]
__lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5136
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x136/0xd60 kernel/locking/mutex.c:747
bd_prepare_to_claim+0x1b0/0x4c0 block/bdev.c:508
truncate_bdev_range+0x4e/0x260 block/bdev.c:105
blkdev_fallocate+0x4d2/0x660 block/fops.c:782
vfs_fallocate+0x551/0x6b0 fs/open.c:324
ksys_fallocate fs/open.c:347 [inline]
__do_sys_fallocate fs/open.c:355 [inline]
__se_sys_fallocate fs/open.c:353 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:353
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
other info that might help us debug this:
Chain exists of:
bdev_lock --> &type->i_mutex_dir_key#3 --> mapping.invalidate_lock#2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(mapping.invalidate_lock#2);
lock(&type->i_mutex_dir_key#3);
lock(mapping.invalidate_lock#2);
lock(bdev_lock);
*** DEADLOCK ***
1 lock held by syz-executor.4/15290:
#0: ffff88801acc94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
#0: ffff88801acc94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x660 block/fops.c:773
stack backtrace:
CPU: 1 PID: 15290 Comm: syz-executor.4 Not tainted 6.6.0-rc7-syzkaller-00041-g611da07b89fd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
check_noncircular+0x375/0x4a0 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3868 [inline]
__lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5136
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x136/0xd60 kernel/locking/mutex.c:747
bd_prepare_to_claim+0x1b0/0x4c0 block/bdev.c:508
truncate_bdev_range+0x4e/0x260 block/bdev.c:105
blkdev_fallocate+0x4d2/0x660 block/fops.c:782
vfs_fallocate+0x551/0x6b0 fs/open.c:324
ksys_fallocate fs/open.c:347 [inline]
__do_sys_fallocate fs/open.c:355 [inline]
__se_sys_fallocate fs/open.c:353 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:353
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f445cc7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f445d9c90c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f445cd9bf80 RCX: 00007f445cc7cae9
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004
RBP: 00007f445ccc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000008800 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f445cd9bf80 R15: 00007fffc143b9d8
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