NILFS error (device loop4): nilfs_bmap_lookup_contig: broken bmap (inode number=16) input: syz1 as /devices/virtual/input/input7 NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds input: syz1 as /devices/virtual/input/input8 ====================================================== WARNING: possible circular locking dependency detected 4.14.296-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/10528 is trying to acquire lock: (&nilfs->ns_sem){++++}, at: [] nilfs_set_error fs/nilfs2/super.c:95 [inline] (&nilfs->ns_sem){++++}, at: [] __nilfs_error+0x176/0x399 fs/nilfs2/super.c:140 but task is already holding lock: (&dat_lock_key){.+.+}, at: [] nilfs_get_block+0x17e/0x7a0 fs/nilfs2/inode.c:92 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&dat_lock_key){.+.+}: down_read+0x36/0x80 kernel/locking/rwsem.c:24 nilfs_count_free_blocks+0x68/0x180 fs/nilfs2/the_nilfs.c:707 nilfs_set_log_cursor fs/nilfs2/super.c:248 [inline] nilfs_cleanup_super+0x123/0x450 fs/nilfs2/super.c:330 nilfs_put_super+0x141/0x190 fs/nilfs2/super.c:484 generic_shutdown_super+0x144/0x370 fs/super.c:446 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (&nilfs->ns_sem){++++}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_write+0x34/0x90 kernel/locking/rwsem.c:54 nilfs_set_error fs/nilfs2/super.c:95 [inline] __nilfs_error+0x176/0x399 fs/nilfs2/super.c:140 nilfs_bmap_convert_error fs/nilfs2/bmap.c:44 [inline] nilfs_bmap_lookup_contig+0x130/0x170 fs/nilfs2/bmap.c:104 nilfs_get_block+0x1bd/0x7a0 fs/nilfs2/inode.c:93 do_mpage_readpage+0x615/0x1470 fs/mpage.c:211 mpage_readpages+0x2d6/0x5f0 fs/mpage.c:383 read_pages mm/readahead.c:121 [inline] __do_page_cache_readahead+0x522/0x940 mm/readahead.c:199 ra_submit mm/internal.h:66 [inline] ondemand_readahead.isra.0+0x514/0xb60 mm/readahead.c:486 page_cache_sync_readahead mm/readahead.c:518 [inline] page_cache_sync_readahead+0xa6/0xf0 mm/readahead.c:503 generic_file_buffered_read mm/filemap.c:2003 [inline] generic_file_read_iter+0xfbc/0x21c0 mm/filemap.c:2273 call_read_iter include/linux/fs.h:1774 [inline] new_sync_read fs/read_write.c:401 [inline] __vfs_read+0x449/0x620 fs/read_write.c:413 integrity_kernel_read+0x11b/0x1b0 security/integrity/iint.c:199 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:381 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:410 [inline] ima_calc_file_hash+0x3ee/0x780 security/integrity/ima/ima_crypto.c:467 ima_collect_measurement+0x39d/0x430 security/integrity/ima/ima_api.c:227 process_measurement+0x78b/0xb20 security/integrity/ima/ima_main.c:264 do_last fs/namei.c:3435 [inline] path_openat+0x10ad/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&dat_lock_key); lock(&nilfs->ns_sem); lock(&dat_lock_key); lock(&nilfs->ns_sem); *** DEADLOCK *** 2 locks held by syz-executor.4/10528: #0: (&iint->mutex){+.+.}, at: [] process_measurement+0x270/0xb20 security/integrity/ima/ima_main.c:225 #1: (&dat_lock_key){.+.+}, at: [] nilfs_get_block+0x17e/0x7a0 fs/nilfs2/inode.c:92 stack backtrace: CPU: 1 PID: 10528 Comm: syz-executor.4 Not tainted 4.14.296-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_write+0x34/0x90 kernel/locking/rwsem.c:54 nilfs_set_error fs/nilfs2/super.c:95 [inline] __nilfs_error+0x176/0x399 fs/nilfs2/super.c:140 nilfs_bmap_convert_error fs/nilfs2/bmap.c:44 [inline] nilfs_bmap_lookup_contig+0x130/0x170 fs/nilfs2/bmap.c:104 nilfs_get_block+0x1bd/0x7a0 fs/nilfs2/inode.c:93 do_mpage_readpage+0x615/0x1470 fs/mpage.c:211 mpage_readpages+0x2d6/0x5f0 fs/mpage.c:383 read_pages mm/readahead.c:121 [inline] __do_page_cache_readahead+0x522/0x940 mm/readahead.c:199 ra_submit mm/internal.h:66 [inline] ondemand_readahead.isra.0+0x514/0xb60 mm/readahead.c:486 page_cache_sync_readahead mm/readahead.c:518 [inline] page_cache_sync_readahead+0xa6/0xf0 mm/readahead.c:503 generic_file_buffered_read mm/filemap.c:2003 [inline] generic_file_read_iter+0xfbc/0x21c0 mm/filemap.c:2273 call_read_iter include/linux/fs.h:1774 [inline] new_sync_read fs/read_write.c:401 [inline] __vfs_read+0x449/0x620 fs/read_write.c:413 integrity_kernel_read+0x11b/0x1b0 security/integrity/iint.c:199 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:381 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:410 [inline] ima_calc_file_hash+0x3ee/0x780 security/integrity/ima/ima_crypto.c:467 ima_collect_measurement+0x39d/0x430 security/integrity/ima/ima_api.c:227 process_measurement+0x78b/0xb20 security/integrity/ima/ima_main.c:264 do_last fs/namei.c:3435 [inline] path_openat+0x10ad/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f8c920995a9 RSP: 002b:00007f8c9060c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f8c921b9f80 RCX: 00007f8c920995a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000880 RBP: 00007f8c920f47b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdcae2675f R14: 00007f8c9060c300 R15: 0000000000022000 input: syz1 as /devices/virtual/input/input9 input: syz1 as /devices/virtual/input/input10 input: syz1 as /devices/virtual/input/input11 Remounting filesystem read-only NILFS (loop4): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 syz-executor.4 (10528) used greatest stack depth: 24720 bytes left NILFS error (device loop4): nilfs_bmap_last_key: broken bmap (inode number=16) NILFS (loop4): error -5 truncating bmap (ino=16) netlink: 256 bytes leftover after parsing attributes in process `syz-executor.0'. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.0'. overlayfs: fs on './file0' does not support file handles, falling back to index=off. bridge0: port 3(veth3) entered blocking state bridge0: port 3(veth3) entered disabled state NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds F2FS-fs (loop2): Invalid blocksize (65536), supports only 4KB device veth3 entered promiscuous mode F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock Zero length message leads to an empty skb F2FS-fs (loop2): Found nat_bits in checkpoint F2FS-fs (loop2): Mounted with checkpoint version = 3e17dab1 netlink: 256 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.0'. bridge0: port 4(veth5) entered blocking state bridge0: port 4(veth5) entered disabled state device veth5 entered promiscuous mode F2FS-fs (loop2): Invalid blocksize (65536), supports only 4KB F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock netlink: 256 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.1'. bridge0: port 3(veth3) entered blocking state bridge0: port 3(veth3) entered disabled state unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 device veth3 entered promiscuous mode netlink: 256 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.0'. bridge0: port 5(veth7) entered blocking state bridge0: port 5(veth7) entered disabled state device veth7 entered promiscuous mode netlink: 256 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.1'. bridge0: port 4(veth5) entered blocking state bridge0: port 4(veth5) entered disabled state device veth5 entered promiscuous mode bridge0: port 6(veth9) entered blocking state bridge0: port 6(veth9) entered disabled state device veth9 entered promiscuous mode bridge0: port 5(veth7) entered blocking state bridge0: port 5(veth7) entered disabled state device veth7 entered promiscuous mode EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue (syz-executor.3,10918,0):ocfs2_parse_options:1498 ERROR: Invalid heartbeat mount options (syz-executor.3,10918,0):ocfs2_fill_super:1217 ERROR: status = -22 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue (syz-executor.3,10945,0):ocfs2_parse_options:1498 ERROR: Invalid heartbeat mount options (syz-executor.3,10945,0):ocfs2_fill_super:1217 ERROR: status = -22 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue (syz-executor.3,10973,1):ocfs2_parse_options:1498 ERROR: Invalid heartbeat mount options EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue (syz-executor.3,10973,1):ocfs2_fill_super:1217 ERROR: status = -22 EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue À: renamed from syztnl2 (syz-executor.3,11022,1):ocfs2_parse_options:1498 ERROR: Invalid heartbeat mount options (syz-executor.3,11022,1):ocfs2_fill_super:1217 ERROR: status = -22 EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue À: renamed from syztnl2 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue À: renamed from syztnl2 À: renamed from syztnl2 À: renamed from syztnl2 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue