NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0
EXT4-fs (loop4): This should not happen!! Data will be lost
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
BTRFS: device fsid 12fb37fd-4717-4f13-b308-150e2e35e08e devid 1 transid 8 /dev/loop3
======================================================
WARNING: possible circular locking dependency detected
4.14.295-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.2/9861 is trying to acquire lock:
 (&nilfs->ns_sem){++++}, at: [<ffffffff87085f04>] nilfs_set_error fs/nilfs2/super.c:95 [inline]
 (&nilfs->ns_sem){++++}, at: [<ffffffff87085f04>] __nilfs_error+0x176/0x399 fs/nilfs2/super.c:140

but task is already holding lock:
 (&dat_lock_key){.+.+}, at: [<ffffffff826b406e>] nilfs_get_block+0x17e/0x7a0 fs/nilfs2/inode.c:88

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:247 [inline]
       nilfs_cleanup_super+0x123/0x450 fs/nilfs2/super.c:329
       load_nilfs+0x6e2/0x1170 fs/nilfs2/the_nilfs.c:326
       nilfs_fill_super fs/nilfs2/super.c:1073 [inline]
       nilfs_mount+0x89f/0xd00 fs/nilfs2/super.c:1331
       mount_fs+0x92/0x2a0 fs/super.c:1237
       vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
       vfs_kern_mount fs/namespace.c:1036 [inline]
       do_new_mount fs/namespace.c:2572 [inline]
       do_mount+0xe65/0x2a30 fs/namespace.c:2905
       SYSC_mount fs/namespace.c:3121 [inline]
       SyS_mount+0xa8/0x120 fs/namespace.c:3098
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       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:89
       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.2/9861:
 #0:  (&iint->mutex){+.+.}, at: [<ffffffff82eef900>] process_measurement+0x270/0xb20 security/integrity/ima/ima_main.c:225
 #1:  (&dat_lock_key){.+.+}, at: [<ffffffff826b406e>] nilfs_get_block+0x17e/0x7a0 fs/nilfs2/inode.c:88

stack backtrace:
CPU: 0 PID: 9861 Comm: syz-executor.2 Not tainted 4.14.295-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:89
 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: 0033:0x7f8509b355a9
RSP: 002b:00007f85084a8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f8509c55f80 RCX: 00007f8509b355a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000880
RBP: 00007f8509b90580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff37a4ee1f R14: 00007f85084a8300 R15: 0000000000022000
ERROR: (device loop5): xtSearch: XT_GETPAGE: xtree page corrupt

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)
EXT4-fs (loop5): Test dummy encryption mount option ignored
NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0
EXT4-fs (loop5): couldn't mount RDWR because of unsupported optional features (8000)
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
BTRFS error (device loop3): unsupported checksum algorithm 1
NILFS error (device loop2): nilfs_bmap_lookup_contig: broken bmap (inode number=16)
BTRFS error (device loop1): unsupported checksum algorithm 1
EXT4-fs (loop5): Test dummy encryption mount option ignored
NILFS (loop2): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0
EXT4-fs (loop5): couldn't mount RDWR because of unsupported optional features (8000)
BTRFS error (device loop1): superblock checksum mismatch
BTRFS error (device loop3): superblock checksum mismatch
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)
BTRFS error (device loop1): open_ctree failed
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)
BTRFS error (device loop3): open_ctree failed
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(1666367084.691:6): pid=9861 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.2" name="file2" dev="loop2" ino=16 res=0
EXT4-fs (loop5): Test dummy encryption mount option ignored
EXT4-fs (loop5): couldn't mount RDWR because of unsupported optional features (8000)
ISO 9660 Extensions: Microsoft Joliet Level 3
EXT4-fs (loop0): fragment/cluster size (4096) != block size (1024)
BTRFS: device fsid da33867d-e382-4163-b5e0-ea15c91cfb38 devid 1 transid 7 /dev/loop3
BTRFS error (device loop1): unsupported checksum algorithm 1
BTRFS info (device loop3): enabling free space tree
print_req_error: I/O error, dev loop0, sector 0
Buffer I/O error on dev loop0, logical block 0, async page read
print_req_error: I/O error, dev loop0, sector 4
Buffer I/O error on dev loop0, logical block 2, async page read
BTRFS error (device loop1): superblock checksum mismatch
print_req_error: I/O error, dev loop0, sector 6
Buffer I/O error on dev loop0, logical block 3, async page read
BTRFS info (device loop3): using free space tree
BTRFS info (device loop3): has skinny extents
EXT4-fs (loop5): Test dummy encryption mount option ignored
F2FS-fs (loop4): Invalid blocksize (65536), supports only 4KB

BTRFS error (device loop1): open_ctree failed
EXT4-fs (loop5): couldn't mount RDWR because of unsupported optional features (8000)
F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock
BTRFS: device fsid 8ff932b8-f4e4-4b03-aed6-d7e5736fd60a devid 1 transid 8 /dev/loop0
print_req_error: I/O error, dev loop1, sector 128
audit: type=1804 audit(1666367085.061:7): pid=10017 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2820568070/syzkaller.gSUBXx/13/bus" dev="sda1" ino=13891 res=1
BTRFS error (device loop0): unsupported checksum algorithm 1
BTRFS error (device loop0): superblock checksum mismatch
audit: type=1800 audit(1666367085.101:8): pid=10017 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=13891 res=0
BTRFS warning (device loop3): loop3 checksum verify failed on 30420992 wanted 538FDB82 found ABC4B005 level 0
BTRFS info (device loop3): read error corrected: ino 0 off 30420992 (dev /dev/loop3 sector 75800)
BTRFS info (device loop3): creating free space tree
BTRFS error (device loop0): open_ctree failed
BTRFS error (device loop0): unsupported checksum algorithm 1
BTRFS info (device loop3): setting 1 ro feature flag
BTRFS info (device loop3): setting 2 ro feature flag
BTRFS info (device loop3): checking UUID tree
BTRFS error (device loop0): superblock checksum mismatch
BTRFS error (device loop0): open_ctree failed
f2fs_msg: 6 callbacks suppressed
F2FS-fs (loop4): Invalid blocksize (65536), supports only 4KB

EXT4-fs (loop5): Test dummy encryption mount option ignored
EXT4-fs (loop5): couldn't mount RDWR because of unsupported optional features (8000)
print_req_error: I/O error, dev loop1, sector 128
BTRFS error (device loop0): unsupported checksum algorithm 1
BTRFS error (device loop0): superblock checksum mismatch
F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock
BTRFS info (device loop3): enabling free space tree
F2FS-fs (loop4): Found nat_bits in checkpoint
BTRFS info (device loop3): using free space tree
BTRFS error (device loop0): open_ctree failed
BTRFS info (device loop3): has skinny extents
BTRFS error (device loop1): unsupported checksum algorithm 1
F2FS-fs (loop4): Mounted with checkpoint version = 3e17dab1
BTRFS error (device loop1): superblock checksum mismatch
BTRFS error (device loop1): open_ctree failed
BTRFS error (device loop1): unsupported checksum algorithm 1
BTRFS error (device loop1): superblock checksum mismatch
BTRFS warning (device loop3): loop3 checksum verify failed on 30420992 wanted 538FDB82 found ABC4B005 level 0
BTRFS error (device loop1): open_ctree failed
BTRFS info (device loop3): read error corrected: ino 0 off 30420992 (dev /dev/loop3 sector 75800)
BTRFS info (device loop3): creating free space tree
BTRFS info (device loop3): setting 1 ro feature flag
BTRFS info (device loop3): setting 2 ro feature flag
BTRFS info (device loop3): checking UUID tree
BTRFS error (device loop0): unsupported checksum algorithm 1
BTRFS error (device loop0): superblock checksum mismatch
BTRFS info (device loop3): enabling free space tree
BTRFS info (device loop3): using free space tree
BTRFS info (device loop3): has skinny extents
BTRFS error (device loop0): open_ctree failed
BTRFS warning (device loop3): loop3 checksum verify failed on 30420992 wanted 538FDB82 found ABC4B005 level 0
BTRFS info (device loop3): read error corrected: ino 0 off 30420992 (dev /dev/loop3 sector 75800)
BTRFS info (device loop3): creating free space tree
BTRFS info (device loop3): setting 1 ro feature flag
BTRFS info (device loop3): setting 2 ro feature flag
BTRFS info (device loop3): checking UUID tree
BTRFS info (device loop3): enabling free space tree
BTRFS info (device loop3): using free space tree
BTRFS info (device loop3): has skinny extents
BTRFS warning (device loop3): loop3 checksum verify failed on 30420992 wanted 538FDB82 found ABC4B005 level 0
BTRFS info (device loop3): read error corrected: ino 0 off 30420992 (dev /dev/loop3 sector 75800)
BTRFS info (device loop3): creating free space tree
BTRFS info (device loop3): setting 1 ro feature flag
BTRFS info (device loop3): setting 2 ro feature flag
BTRFS info (device loop3): checking UUID tree
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): mounting unchecked fs
NILFS (loop4): recovery complete
NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
NILFS (loop4): mounting unchecked fs
NILFS (loop4): recovery complete
NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.3'.
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): mounting unchecked fs
NILFS (loop4): recovery complete
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): mounting unchecked fs
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
NILFS (loop4): recovery complete
NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
audit: type=1800 audit(1666367087.802:9): pid=10589 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="sda1" ino=13969 res=0
audit: type=1804 audit(1666367087.802:10): pid=10589 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3790233908/syzkaller.G0hZNp/29/file0" dev="sda1" ino=13969 res=1
audit: type=1804 audit(1666367087.802:11): pid=10589 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir3790233908/syzkaller.G0hZNp/29/file0" dev="sda1" ino=13969 res=1
audit: type=1800 audit(1666367087.812:12): pid=10591 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=13974 res=0
audit: type=1804 audit(1666367087.812:13): pid=10591 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir2111630327/syzkaller.LTD7te/42/file0" dev="sda1" ino=13974 res=1
audit: type=1804 audit(1666367087.812:14): pid=10591 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir2111630327/syzkaller.LTD7te/42/file0" dev="sda1" ino=13974 res=1
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.5'.
netem: invalid attributes len -24
netem: change failed
audit: type=1800 audit(1666367088.272:15): pid=10642 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=14003 res=0
audit: type=1804 audit(1666367088.302:16): pid=10642 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir2111630327/syzkaller.LTD7te/44/file0" dev="sda1" ino=14003 res=1
audit: type=1804 audit(1666367088.302:17): pid=10642 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir2111630327/syzkaller.LTD7te/44/file0" dev="sda1" ino=14003 res=1
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.1'.
netem: invalid attributes len -24
netem: change failed
cgroup: cgroup2: unknown option "net_prio"
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
audit: type=1800 audit(1666367089.062:18): pid=10742 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="sda1" ino=14003 res=0
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
batman_adv: Cannot find parent device
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'.
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'.
cannot load conntrack support for proto=10
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
ip6tnl0: Invalid MTU 0 requested, hw min 68
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'.
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'.
sch_tbf: burst 0 is lower than device lo mtu (65550) !
EXT4-fs error (device loop3): ext4_quota_enable:5737: comm syz-executor.3: inode #2318433512: comm syz-executor.3: iget: illegal inode #
EXT4-fs error (device loop3): ext4_quota_enable:5739: comm syz-executor.3: Bad quota inode # 2318433512
EXT4-fs warning (device loop3): ext4_enable_quotas:5779: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix.
EXT4-fs (loop3): mount failed
netem: change failed