loop8: detected capacity change from 0 to 512
EXT4-fs (loop8): mounted filesystem without journal. Quota mode: writeback.
EXT4-fs error (device loop8): ext4_xattr_block_get:546: inode #15: comm syz.8.297: corrupted xattr block 33
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 6270 Comm: syz.8.297 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 debug_object_activate+0x7c/0x468 lib/debugobjects.c:698
 debug_work_activate kernel/workqueue.c:510 [inline]
 __queue_work+0xca8/0x123c kernel/workqueue.c:1519
 __queue_delayed_work kernel/workqueue.c:1668 [inline]
 mod_delayed_work_on+0x1bc/0x2cc kernel/workqueue.c:1742
 kblockd_mod_delayed_work_on+0x3c/0x54 block/blk-core.c:1074
 blk_mq_kick_requeue_list block/blk-mq.c:1508 [inline]
 blk_mq_add_to_requeue_list+0x208/0x270 block/blk-mq.c:1503
 blk_flush_queue_rq block/blk-flush.c:143 [inline]
 blk_flush_complete_seq+0x5ac/0xa78 block/blk-flush.c:198
 blk_insert_flush+0x2d0/0x3a0 block/blk-flush.c:451
 blk_mq_submit_bio+0xb90/0x1a48 block/blk-mq.c:3034
 __submit_bio+0x1d8/0x260 block/blk-core.c:591
 __submit_bio_noacct_mq block/blk-core.c:668 [inline]
 submit_bio_noacct_nocheck+0x67c/0x9ec block/blk-core.c:697
 submit_bio_noacct+0xcdc/0x16e0 block/blk-core.c:808
 submit_bio+0x29c/0x3d0 block/blk-core.c:853
 submit_bh_wbc+0x384/0x454 fs/buffer.c:2702
 submit_bh+0x2c/0x3c fs/buffer.c:2707
 ext4_commit_super+0x318/0x54c fs/ext4/super.c:6129
 ext4_handle_error+0x560/0x784 fs/ext4/super.c:677
 __ext4_error_inode+0x24c/0x398 fs/ext4/super.c:810
 __ext4_xattr_check_block+0x414/0x504 fs/ext4/xattr.c:254
 ext4_xattr_block_get fs/ext4/xattr.c:546 [inline]
 ext4_xattr_get+0x1ec/0x544 fs/ext4/xattr.c:664
 ext4_xattr_security_get+0x40/0x54 fs/ext4/xattr_security.c:20
 __vfs_getxattr+0x34c/0x368 fs/xattr.c:407
 cap_inode_need_killpriv+0x50/0x78 security/commoncap.c:301
 security_inode_need_killpriv+0x6c/0xa4 security/security.c:1436
 dentry_needs_remove_privs fs/inode.c:2054 [inline]
 __file_remove_privs+0x1c0/0x504 fs/inode.c:2085
 file_modified_flags+0xb0/0x37c fs/inode.c:2207
 file_modified+0x24/0x34 fs/inode.c:2236
 ext4_fallocate+0x5c4/0x1b60 fs/ext4/extents.c:4807
 vfs_fallocate+0x4a4/0x5f4 fs/open.c:323
 ksys_fallocate fs/open.c:346 [inline]
 __do_sys_fallocate fs/open.c:354 [inline]
 __se_sys_fallocate fs/open.c:352 [inline]
 __arm64_sys_fallocate+0xc0/0x110 fs/open.c:352
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585