loop7: detected capacity change from 0 to 1024
EXT4-fs (loop7): mounted filesystem without journal. Quota mode: none.
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 8001 Comm: syz.7.736 Not tainted 6.1.148-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
 __folio_mark_dirty+0x44/0xce0 mm/page-writeback.c:2635
 __set_page_dirty include/linux/pagemap.h:1088 [inline]
 mark_buffer_dirty+0x2b8/0x5cc fs/buffer.c:1105
 __ext4_handle_dirty_metadata+0x27c/0x714 fs/ext4/ext4_jbd2.c:379
 ext4_do_update_inode fs/ext4/inode.c:5263 [inline]
 ext4_mark_iloc_dirty+0x1154/0x1858 fs/ext4/inode.c:5886
 __ext4_mark_inode_dirty+0x43c/0x790 fs/ext4/inode.c:6090
 ext4_dirty_inode+0xd0/0x100 fs/ext4/inode.c:6119
 __mark_inode_dirty+0x2e8/0x12a0 fs/fs-writeback.c:2433
 generic_update_time fs/inode.c:1946 [inline]
 inode_update_time fs/inode.c:1959 [inline]
 touch_atime+0x40c/0x7d0 fs/inode.c:2031
 file_accessed include/linux/fs.h:2600 [inline]
 ext4_file_mmap+0x140/0x2f8 fs/ext4/file.c:780
 call_mmap include/linux/fs.h:2270 [inline]
 mmap_file+0x6c/0xc8 mm/util.c:1109
 __mmap_region mm/mmap.c:2768 [inline]
 mmap_region+0xcc8/0x1860 mm/mmap.c:2912
 do_mmap+0x978/0x10dc mm/mmap.c:1432
 vm_mmap_pgoff+0x184/0x284 mm/util.c:520
 ksys_mmap_pgoff+0x3b8/0x5a0 mm/mmap.c:1478
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __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
EXT4-fs error (device loop7): ext4_map_blocks:745: inode #15: block 1: comm syz.7.736: lblock 1 mapped to illegal pblock 1 (length 7)
EXT4-fs (loop7): Delayed block allocation failed for inode 15 at logical offset 1 with max blocks 7 with error 117
EXT4-fs (loop7): This should not happen!! Data will be lost

EXT4-fs error (device loop7): ext4_map_blocks:635: inode #15: block 4: comm syz.7.736: lblock 4 mapped to illegal pblock 4 (length 1)