loop2: detected capacity change from 0 to 2048
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 23043 Comm: syz.2.8472 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __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:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b30/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 local_lock_acquire+0x44/0x14c include/linux/local_lock_internal.h:29
 rmqueue_pcplist mm/page_alloc.c:3699 [inline]
 rmqueue mm/page_alloc.c:3742 [inline]
 get_page_from_freelist+0x2140/0x2aa8 mm/page_alloc.c:4189
 __alloc_pages+0x1a0/0x470 mm/page_alloc.c:5474
 alloc_pages+0x34c/0x5c0 mm/mempolicy.c:-1
 __page_cache_alloc+0x78/0x514 mm/filemap.c:1022
 pagecache_get_page+0x938/0xcb4 mm/filemap.c:1940
 find_or_create_page include/linux/pagemap.h:420 [inline]
 grab_cache_page include/linux/pagemap.h:502 [inline]
 nilfs_grab_buffer+0xa4/0x3fc fs/nilfs2/page.c:56
 nilfs_btnode_submit_block+0xc4/0x5e0 fs/nilfs2/btnode.c:95
 __nilfs_btree_get_block+0x108/0x5b4 fs/nilfs2/btree.c:481
 nilfs_btree_do_lookup+0x3f4/0x994 fs/nilfs2/btree.c:579
 nilfs_btree_lookup_contig+0xc8/0x968 fs/nilfs2/btree.c:720
 nilfs_bmap_lookup_contig+0x88/0x13c fs/nilfs2/bmap.c:100
 nilfs_get_block+0x1a0/0x808 fs/nilfs2/inode.c:85
 do_mpage_readpage+0x7b0/0x1ab4 fs/mpage.c:231
 mpage_readahead+0x2f8/0x774 fs/mpage.c:389
 nilfs_readahead+0x28/0x38 fs/nilfs2/inode.c:155
 read_pages+0x138/0x424 mm/readahead.c:130
 page_cache_ra_unbounded+0x4fc/0x5dc mm/readahead.c:239
 do_page_cache_ra mm/readahead.c:269 [inline]
 ondemand_readahead+0x63c/0xce0 mm/readahead.c:552
 page_cache_sync_ra+0x130/0x180 mm/readahead.c:580
 page_cache_sync_readahead include/linux/pagemap.h:833 [inline]
 filemap_get_pages mm/filemap.c:2551 [inline]
 filemap_read+0x40c/0x1720 mm/filemap.c:2634
 generic_file_read_iter+0xe8/0x518 mm/filemap.c:2794
 __kernel_read+0x3e8/0x7ac fs/read_write.c:443
 kernel_read+0xd8/0x1d4 fs/read_write.c:461
 prepare_binprm fs/exec.c:1672 [inline]
 search_binary_handler fs/exec.c:1726 [inline]
 exec_binprm fs/exec.c:1783 [inline]
 bprm_execve+0x748/0x1508 fs/exec.c:1852
 do_execveat_common+0x648/0x7dc fs/exec.c:1957
 do_execveat fs/exec.c:2038 [inline]
 __do_sys_execveat fs/exec.c:2112 [inline]
 __se_sys_execveat fs/exec.c:2106 [inline]
 __arm64_sys_execveat+0xd0/0xec fs/exec.c:2106
 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
Remounting filesystem read-only
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)