NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/8156 is trying to acquire lock: 00000000811a4dcf (&dat_lock_key){.+.+}, at: nilfs_count_free_blocks+0x68/0x180 fs/nilfs2/the_nilfs.c:698 but task is already holding lock: 00000000af241d24 (&nilfs->ns_sem){++++}, at: nilfs_put_super+0x14a/0x1a0 fs/nilfs2/super.c:472 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&nilfs->ns_sem){++++}: nilfs_set_error fs/nilfs2/super.c:86 [inline] __nilfs_error+0x195/0x401 fs/nilfs2/super.c:131 nilfs_bmap_convert_error fs/nilfs2/bmap.c:35 [inline] nilfs_bmap_lookup_contig+0x13d/0x180 fs/nilfs2/bmap.c:95 nilfs_get_block+0x1ce/0x970 fs/nilfs2/inode.c:80 do_mpage_readpage+0x8fb/0x1ca0 fs/mpage.c:231 mpage_readpages+0x33a/0x630 fs/mpage.c:404 read_pages.isra.0+0xf6/0x5d0 mm/readahead.c:123 __do_page_cache_readahead+0x5c6/0x6c0 mm/readahead.c:211 ra_submit mm/internal.h:66 [inline] ondemand_readahead.isra.0+0x575/0xd40 mm/readahead.c:493 page_cache_sync_readahead mm/readahead.c:528 [inline] page_cache_sync_readahead+0x275/0x520 mm/readahead.c:510 generic_file_buffered_read mm/filemap.c:2115 [inline] generic_file_read_iter+0x1497/0x2b60 mm/filemap.c:2385 call_read_iter include/linux/fs.h:1815 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x518/0x750 fs/read_write.c:418 integrity_kernel_read+0x147/0x1f0 security/integrity/iint.c:200 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:364 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:393 [inline] ima_calc_file_hash+0x4b2/0x8a0 security/integrity/ima/ima_crypto.c:450 ima_collect_measurement+0x4c4/0x570 security/integrity/ima/ima_api.c:231 process_measurement+0xddd/0x1440 security/integrity/ima/ima_main.c:284 ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:391 do_last fs/namei.c:3425 [inline] path_openat+0x7e4/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&dat_lock_key){.+.+}: down_read+0x36/0x80 kernel/locking/rwsem.c:24 nilfs_count_free_blocks+0x68/0x180 fs/nilfs2/the_nilfs.c:698 nilfs_set_log_cursor fs/nilfs2/super.c:237 [inline] nilfs_cleanup_super+0x133/0x490 fs/nilfs2/super.c:319 nilfs_put_super+0x152/0x1a0 fs/nilfs2/super.c:473 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&nilfs->ns_sem); lock(&dat_lock_key); lock(&nilfs->ns_sem); lock(&dat_lock_key); *** DEADLOCK *** 2 locks held by syz-executor.2/8156: #0: 0000000011abd12e (&type->s_umount_key#72){+.+.}, at: deactivate_super+0x16c/0x1a0 fs/super.c:359 #1: 00000000af241d24 (&nilfs->ns_sem){++++}, at: nilfs_put_super+0x14a/0x1a0 fs/nilfs2/super.c:472 stack backtrace: CPU: 1 PID: 8156 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 down_read+0x36/0x80 kernel/locking/rwsem.c:24 nilfs_count_free_blocks+0x68/0x180 fs/nilfs2/the_nilfs.c:698 nilfs_set_log_cursor fs/nilfs2/super.c:237 [inline] nilfs_cleanup_super+0x133/0x490 fs/nilfs2/super.c:319 nilfs_put_super+0x152/0x1a0 fs/nilfs2/super.c:473 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fdfbfe80a17 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffe67f92c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fdfbfe80a17 RDX: 00007fffe67f939a RSI: 000000000000000a RDI: 00007fffe67f9390 RBP: 00007fffe67f9390 R08: 00000000ffffffff R09: 00007fffe67f9160 R10: 000055555718b903 R11: 0000000000000246 R12: 00007fdfbfed9826 R13: 00007fffe67fa450 R14: 000055555718b810 R15: 00007fffe67fa490 NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) Remounting filesystem read-only NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) audit: type=1800 audit(1667116428.800:83): pid=13126 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.2" name="file2" dev="loop2" ino=16 res=0 NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16) audit: type=1800 audit(1667116428.890:84): pid=13145 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.2" name="file2" dev="loop2" ino=16 res=0