syzbot


INFO: task hung in fib6_rules_net_exit

Status: auto-closed as invalid on 2022/05/19 15:58
Reported-by: syzbot+86573ae8f3ebb6e3e91f@syzkaller.appspotmail.com
First crash: 861d, last: 861d
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in fib6_rules_net_exit (2) 1 667d 667d 0/1 auto-obsoleted due to no activity on 2022/11/29 01:33
upstream INFO: task hung in fib6_rules_net_exit (2) net 7 1251d 1342d 0/26 auto-closed as invalid on 2021/03/25 09:49
upstream INFO: task hung in fib6_rules_net_exit net 1 2252d 2251d 0/26 closed as dup on 2018/03/31 16:17
android-49 INFO: task hung in fib6_rules_net_exit 1 2039d 1872d 0/3 auto-closed as invalid on 2019/04/28 09:31
upstream INFO: task hung in fib6_rules_net_exit (3) net 24 951d 986d 0/26 auto-closed as invalid on 2022/01/18 22:47
android-49 INFO: task hung in fib6_rules_net_exit (2) 1 1700d 1700d 0/3 auto-closed as invalid on 2020/01/31 05:34

Sample crash report:
Name                      Used          Total
pid_13                     2KB          7KB
pid_12                     7KB         11KB
pid_11                    33KB         41KB
pid_10                    79KB         82KB
INFO: task kworker/u4:4:19703 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
pid_9                    124KB        127KB
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:4    D25080 19703      2 0x80000000
pid_8                    106KB        112KB
pid_7                     78KB         84KB
pid_6                     39KB         44KB
pid_5                     13KB         20KB
Workqueue: netns cleanup_net
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
pid_4                      1KB          3KB
pid_3                      3KB          7KB
pid_2                    889KB       1088KB
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
ubi_wl_entry_slab          1KB          3KB
batadv_tl_cache            5KB         12KB
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
TIPC                    2640KB       2640KB
rds_connection             0KB          3KB
SCTPv6                  5843KB       5847KB
SCTP                       7KB         11KB
sctp_chunk                 0KB          7KB
sctp_bind_bucket           0KB          3KB
DCCPv6                  7062KB       7065KB
DCCP                    6716KB       6718KB
 fib6_rules_net_exit+0xe/0x50 net/ipv6/fib6_rules.c:487
 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153
L2TP/IP                    1KB          7KB
RXRPC                   2861KB       2866KB
rxrpc_call_jar         19834KB      19837KB
can_receiver               0KB          3KB
 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554
bridge_fdb_cache          11KB         19KB
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
fib6_nodes               180KB        240KB
ip6_dst_cache            169KB        360KB
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
RAWv6                  28628KB      28633KB
 kthread+0x33f/0x460 kernel/kthread.c:259
UDPv6                   3318KB       3322KB
TCPv6                   5769KB       5772KB
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
INFO: task syz-executor.5:9005 blocked for more than 140 seconds.
nf_conntrack               2KB         15KB
      Not tainted 4.19.211-syzkaller #0
t10_alua_lu_gp_cache          0KB          3KB
sd_ext_cdb                 0KB          7KB
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D26784  9005   4411 0x00000000
scsi_sense_cache        1056KB       1060KB
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
virtio_scsi_cmd           16KB         16KB
sgpool-128                 8KB          8KB
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
sgpool-64                  4KB         12KB
sgpool-32                  2KB         15KB
sgpool-16                  1KB          7KB
sgpool-8                   0KB          7KB
mqueue_inode_cache         27KB         52KB
bio_post_read_ctx         14KB         15KB
bio-2                     14KB         15KB
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 ip_tunnel_init_net+0x321/0x990 net/ipv4/ip_tunnel.c:1034
jfs_mp                     7KB          7KB
cifs_small_rq             15KB         16KB
cifs_request              67KB         67KB
cifs_mpx_ids               0KB          7KB
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:316
nfs_commit_data            3KB         14KB
nfs_write_data            34KB         44KB
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
ext4_system_zone           1KB          7KB
kioctx                     1KB          7KB
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
bio-1                      1KB          7KB
fasync_cache               0KB          4KB
pid_namespace            873KB        873KB
rpc_buffers               17KB         25KB
rpc_tasks                  2KB          7KB
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
UNIX                      95KB        108KB
tcp_bind_bucket          221KB        224KB
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
inet_peer_cache           63KB         68KB
ip_fib_trie               27KB         39KB
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f820575afe9
Code: Bad RIP value.
ip_fib_alias             129KB        158KB
RSP: 002b:00007f82040af118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
ip_dst_cache               9KB         76KB
RAW                    16963KB      16965KB
RAX: ffffffffffffffda RBX: 00007f820586e030 RCX: 00007f820575afe9
UDP                     4782KB       4785KB
RDX: 0000000020001040 RSI: 0000000020001040 RDI: 0000000062102000
TCP                      160KB        174KB
hugetlbfs_inode_cache        236KB        422KB
RBP: 00007f82057b508d R08: 00000000200010c0 R09: 00000000200010c0
R10: 0000000020001080 R11: 0000000000000206 R12: 0000000000000000
fscache_cookie_jar          1KB          7KB
eventpoll_pwq             13KB         35KB
R13: 00007ffcbca60b7f R14: 00007f82040af300 R15: 0000000000022000
INFO: task syz-executor.5:9600 blocked for more than 140 seconds.
eventpoll_epi             24KB         47KB
inotify_inode_mark          9KB         23KB
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
request_queue            222KB        222KB
blkdev_requests            1KB          3KB
syz-executor.5  D26784  9600   9322 0x00000000
blkdev_ioc                22KB         30KB
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
bio-0                   2467KB       2467KB
biovec-max              1872KB       1872KB
biovec-64               2377KB       2378KB
biovec-16                422KB        423KB
bio_integrity_payload          1KB          8KB
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
khugepaged_mm_slot        360KB        364KB
user_namespace            12KB         25KB
uid_cache                  0KB          4KB
dmaengine-unmap-2          0KB          3KB
audit_buffer               0KB          3KB
 ip_tunnel_init_net+0x321/0x990 net/ipv4/ip_tunnel.c:1034
skbuff_fclone_cache        577KB        630KB
skbuff_head_cache       7978KB       8021KB
configfs_dir_cache          3KB         11KB
file_lock_cache           14KB         19KB
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:316
file_lock_ctx             10KB         15KB
fsnotify_mark_connector          4KB         15KB
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
net_namespace          24666KB      24666KB
shmem_inode_cache       8118KB       8493KB
task_delay_info         2128KB       2968KB
taskstats                 13KB         53KB
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
proc_dir_entry        129543KB     129547KB
pde_opener                 2KB         23KB
seq_file                  58KB         70KB
sigqueue                 503KB        504KB
kernfs_node_cache     416709KB     416713KB
mnt_cache               1017KB       1020KB
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
filp                    5129KB       7410KB
names_cache            44816KB      44846KB
RIP: 0033:0x7f820575afe9
Code: Bad RIP value.
RSP: 002b:00007f82040af118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
iint_cache                91KB        103KB
key_jar                    6KB         11KB
RAX: ffffffffffffffda RBX: 00007f820586e030 RCX: 00007f820575afe9
RDX: 0000000020001040 RSI: 0000000020001040 RDI: 0000000062102000
uts_namespace              8KB         15KB
nsproxy                  239KB        241KB
vm_area_struct         44998KB      44998KB
RBP: 00007f82057b508d R08: 00000000200010c0 R09: 00000000200010c0
mm_struct              10128KB      10205KB
fs_cache                2871KB       4064KB
R10: 0000000020001080 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffcbca60b7f R14: 00007f82040af300 R15: 0000000000022000
files_cache            10530KB      12442KB
signal_cache           16246KB      18500KB
INFO: task syz-executor.5:9945 blocked for more than 140 seconds.
sighand_cache          14552KB      14804KB
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task_struct            71419KB      71451KB
cred_jar                5753KB       8180KB
anon_vma_chain         37617KB      37618KB
syz-executor.5  D26392  9945   9322 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
anon_vma               19826KB      20093KB
pid                      702KB        824KB
Acpi-Operand             156KB        198KB
Acpi-ParseExt              9KB         11KB
Acpi-Parse                41KB         47KB
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
Acpi-State                52KB         63KB
Acpi-Namespace            20KB         27KB
numa_policy                0KB          3KB
debug_objects_cache      33041KB      33046KB
trace_event_file         297KB        298KB
ftrace_event_field        398KB        401KB
 ip_tunnel_init_net+0x321/0x990 net/ipv4/ip_tunnel.c:1034
pool_workqueue          3637KB       3640KB
page->ptl               9589KB       9614KB
kmalloc-2097152         2050KB       2050KB
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:316
kmalloc-524288          2056KB       2056KB
kmalloc-262144          1290KB       1290KB
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
kmalloc-131072           650KB        650KB
kmalloc-65536           2838KB       2838KB
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
kmalloc-32768         165264KB     165264KB
kmalloc-16384          58921KB      58921KB
kmalloc-8192          111837KB     111837KB
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
kmalloc-4096          551713KB     551735KB
kmalloc-2048          424660KB     424702KB
kmalloc-1024          177478KB     177486KB
kmalloc-512           136236KB     147232KB
kmalloc-256            89089KB      90258KB
kmalloc-128            42993KB      42997KB
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
kmalloc-96             12427KB      12956KB
kmalloc-64             31372KB      32524KB
kmalloc-32             27731KB      28649KB
kmalloc-192            58544KB      60020KB
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f820575afe9
Code: Bad RIP value.
kmem_cache               182KB        187KB
Out of memory (oom_kill_allocating_task): Kill process 30086 (syz-executor.5) score 0 or sacrifice child
RSP: 002b:00007f82040af118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
Killed process 30086 (syz-executor.5) total-vm:56936kB, anon-rss:424kB, file-rss:14080kB, shmem-rss:0kB
RAX: ffffffffffffffda RBX: 00007f820586e030 RCX: 00007f820575afe9
RDX: 0000000020001040 RSI: 0000000020001040 RDI: 0000000062102000
RBP: 00007f82057b508d R08: 00000000200010c0 R09: 00000000200010c0
oom_reaper: reaped process 30086 (syz-executor.5), now anon-rss:0kB, file-rss:14080kB, shmem-rss:0kB
R10: 0000000020001080 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffcbca60b7f R14: 00007f82040af300 R15: 0000000000022000
systemd-cgroups invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null), order=0, oom_score_adj=0
INFO: task syz-executor.5:10003 blocked for more than 140 seconds.
systemd-cgroups cpuset=/ mems_allowed=0-1
CPU: 0 PID: 7797 Comm: systemd-cgroups Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
      Not tainted 4.19.211-syzkaller #0
 dump_header+0x15d/0xc3f mm/oom_kill.c:443
 oom_kill_process.cold+0x10/0x692 mm/oom_kill.c:956
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 out_of_memory mm/oom_kill.c:1114 [inline]
 out_of_memory+0x1072/0x1390 mm/oom_kill.c:1064
 __alloc_pages_may_oom mm/page_alloc.c:3553 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4255 [inline]
 __alloc_pages_nodemask+0x23a2/0x2890 mm/page_alloc.c:4419
 alloc_pages_current+0x193/0x2a0 mm/mempolicy.c:2197
syz-executor.5  D26920 10003   9600 0x00000000
 alloc_pages include/linux/gfp.h:532 [inline]
 __page_cache_alloc mm/filemap.c:969 [inline]
 page_cache_read mm/filemap.c:2408 [inline]
 filemap_fault+0x146e/0x2180 mm/filemap.c:2592
 ext4_filemap_fault+0x84/0xb0 fs/ext4/inode.c:6379
 __do_fault+0x10b/0x4b0 mm/memory.c:3403
Call Trace:
 do_read_fault mm/memory.c:3815 [inline]
 do_fault mm/memory.c:3944 [inline]
 handle_pte_fault mm/memory.c:4175 [inline]
 __handle_mm_fault+0x273b/0x41c0 mm/memory.c:4299
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 handle_mm_fault+0x436/0xb10 mm/memory.c:4336
 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205
RIP: 0033:0x7fb5ba9a7415
Code: Bad RIP value.
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
RSP: 002b:00007ffcfba85370 EFLAGS: 00010202
RAX: 00007fb5ba1c32c8 RBX: 00007fb5babbf9e8 RCX: 000000000000004c
RDX: 00000000000003f3 RSI: 0000000000330a00 RDI: 00000000bba75332
RBP: 0000000000000003 R08: 00007ffcfba854c0 R09: 00007fb5babc3428
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
R10: 00007fb5b8735fd8 R11: 00007fb5b8532000 R12: 0000000000000012
R13: 0000000000000000 R14: 00007fb5babb96e0 R15: 0000000000000000
Mem-Info:
active_anon:362421 inactive_anon:8477 isolated_anon:0
 active_file:16 inactive_file:16 isolated_file:0
 unevictable:0 dirty:0 writeback:0 unstable:0
 slab_reclaimable:53400 slab_unreclaimable:1007580
 mapped:19029 shmem:17375 pagetables:87022 bounce:0
 free:24889 free_pcp:905 free_cma:0
Node 0 active_anon:1301600kB inactive_anon:33732kB active_file:28kB inactive_file:28kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:75968kB dirty:0kB writeback:0kB shmem:69312kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 667648kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 active_anon:148084kB inactive_anon:176kB active_file:36kB inactive_file:36kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:148kB dirty:0kB writeback:0kB shmem:188kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
 ip_tunnel_init_net+0x321/0x990 net/ipv4/ip_tunnel.c:1034
Node 0 DMA free:10984kB min:204kB low:252kB high:300kB active_anon:704kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:96kB pagetables:508kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:316
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
lowmem_reserve[]: 0 2693 2695 2695 2695
Node 0 DMA32 free:35032kB min:35996kB low:44992kB high:53988kB active_anon:1300896kB inactive_anon:33732kB active_file:28kB inactive_file:28kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:51552kB pagetables:131788kB bounce:0kB free_pcp:1348kB local_pcp:576kB free_cma:0kB
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
lowmem_reserve[]: 0 0 1 1 1
Node 0 Normal free:0kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f820575afe9
lowmem_reserve[]: 0 0 0 0 0
Node 1 Normal free:53604kB min:53876kB low:67344kB high:80812kB active_anon:148072kB inactive_anon:176kB active_file:36kB inactive_file:36kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:146592kB pagetables:215820kB bounce:0kB free_pcp:2288kB local_pcp:952kB free_cma:0kB
Code: Bad RIP value.
RSP: 002b:00007f82040af118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f820586e030 RCX: 00007f820575afe9
lowmem_reserve[]: 0 0 0 0 0
Node 0 DMA: 18*4kB (M) 24*8kB (UM) 6*16kB (UME) 12*32kB (UM) 6*64kB (UME) 1*128kB (M) 2*256kB (UE) 2*512kB (UE) 2*1024kB (ME) 1*2048kB (E) 1*4096kB (M) = 10984kB
RDX: 0000000020001040 RSI: 0000000020001040 RDI: 0000000062102000
RBP: 00007f82057b508d R08: 00000000200010c0 R09: 00000000200010c0
Node 0 DMA32: 3508*4kB (UM) 1145*8kB (UM) 328*16kB (M) 146*32kB (M) 1*64kB (M) 2*128kB (UM) 2*256kB (UM) 2*512kB (UM) 0*1024kB 0*2048kB 0*4096kB = 34968kB
R10: 0000000020001080 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffcbca60b7f R14: 00007f82040af300 R15: 0000000000022000
Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB
INFO: task syz-executor.5:10594 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
Node 1 Normal: 4581*4kB (UME) 1106*8kB (UME) 326*16kB (UM) 45*32kB (UME) 17*64kB (UME) 14*128kB (UM) 2*256kB (UE) 2*512kB (ME) 1*1024kB (M) 1*2048kB (E) 3*4096kB (M) = 53604kB
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D26888 10594   9170 0x00000000
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
17407 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
 ip_tunnel_init_net+0x321/0x990 net/ipv4/ip_tunnel.c:1034
2097051 pages RAM
0 pages HighMem/MovableOnly
369649 pages reserved
0 pages cma reserved
Unreclaimable slab info:
Name                      Used          Total
pid_13                     2KB          7KB
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:316
pid_12                     7KB         11KB
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
pid_11                    33KB         41KB
pid_10                    79KB         82KB
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
pid_9                    124KB        127KB
pid_8                    106KB        112KB
pid_7                     78KB         84KB
pid_6                     39KB         44KB
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
pid_5                     13KB         20KB
pid_4                      1KB          3KB
pid_3                      3KB          7KB
pid_2                    889KB       1088KB
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
ubi_wl_entry_slab          1KB          3KB
batadv_tl_cache            5KB         12KB
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f820575afe9
Code: Bad RIP value.
TIPC                    2640KB       2640KB
rds_connection             0KB          3KB
RSP: 002b:00007f82040af118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f820586e030 RCX: 00007f820575afe9
SCTPv6                  5843KB       5847KB
SCTP                       7KB         11KB
sctp_chunk                 0KB          7KB
sctp_bind_bucket           0KB          3KB
RDX: 0000000020001040 RSI: 0000000020001040 RDI: 0000000062102000
RBP: 00007f82057b508d R08: 00000000200010c0 R09: 00000000200010c0
DCCPv6                  7062KB       7065KB
DCCP                    6716KB       6718KB
R10: 0000000020001080 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffcbca60b7f R14: 00007f82040af300 R15: 0000000000022000
L2TP/IP                    1KB          7KB
RXRPC                   2861KB       2866KB
rxrpc_call_jar         19834KB      19837KB
can_receiver               0KB          3KB
bridge_fdb_cache          11KB         19KB
INFO: task syz-executor.5:10609 blocked for more than 140 seconds.
fib6_nodes               180KB        240KB
ip6_dst_cache            169KB        360KB
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D26792 10609   9336 0x00000000
RAWv6                  28628KB      28633KB
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
UDPv6                   3318KB       3322KB
TCPv6                   5769KB       5772KB
nf_conntrack               2KB         15KB
t10_alua_lu_gp_cache          0KB          3KB
sd_ext_cdb                 0KB          7KB
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
scsi_sense_cache        1056KB       1060KB
virtio_scsi_cmd           16KB         16KB
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
sgpool-128                 8KB          8KB
sgpool-64                  4KB         12KB
sgpool-32                  2KB         15KB
sgpool-16                  1KB          7KB
sgpool-8                   0KB          7KB
mqueue_inode_cache         27KB         52KB
bio_post_read_ctx         14KB         15KB
 ip_tunnel_init_net+0x321/0x990 net/ipv4/ip_tunnel.c:1034
bio-2                     14KB         15KB
jfs_mp                     7KB          7KB
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
cifs_small_rq             15KB         16KB
cifs_request              67KB         67KB
 setup_net+0x2c2/0x720 net/core/net_namespace.c:316
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
cifs_mpx_ids               0KB          7KB
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
nfs_commit_data            3KB         14KB
nfs_write_data            34KB         44KB
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
ext4_system_zone           1KB          7KB
kioctx                     1KB          7KB
bio-1                      1KB          7KB
fasync_cache               0KB          4KB
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
pid_namespace            873KB        873KB
rpc_buffers               17KB         25KB
rpc_tasks                  2KB          7KB
UNIX                      95KB        108KB
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
tcp_bind_bucket          220KB        224KB
inet_peer_cache           63KB         68KB
ip_fib_trie               27KB         39KB
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f820575afe9
Code: Bad RIP value.
RSP: 002b:00007f82040af118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
ip_fib_alias             129KB        158KB
ip_dst_cache               9KB         76KB
RAX: ffffffffffffffda RBX: 00007f820586e030 RCX: 00007f820575afe9
RAW                    16963KB      16965KB
RDX: 0000000020001040 RSI: 0000000020001040 RDI: 0000000062102000
RBP: 00007f82057b508d R08: 00000000200010c0 R09: 00000000200010c0
UDP                     4782KB       4785KB
TCP                      160KB        174KB
R10: 0000000020001080 R11: 0000000000000206 R12: 0000000000000000
hugetlbfs_inode_cache        236KB        422KB
fscache_cookie_jar          1KB          7KB
R13: 00007ffcbca60b7f R14: 00007f82040af300 R15: 0000000000022000
eventpoll_pwq             13KB         35KB
eventpoll_epi             24KB         47KB
INFO: task syz-executor.5:10681 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
inotify_inode_mark          9KB         23KB
request_queue            222KB        222KB
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D26768 10681   9005 0x00000000
blkdev_requests            1KB          3KB
blkdev_ioc                22KB         30KB
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
bio-0                   2465KB       2467KB
biovec-max              1872KB       1872KB
biovec-64               2377KB       2378KB
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
biovec-16                422KB        423KB
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
bio_integrity_payload          1KB          8KB
khugepaged_mm_slot        360KB        364KB
user_namespace            12KB         25KB
uid_cache                  0KB          4KB
dmaengine-unmap-2          0KB          3KB
audit_buffer               0KB          3KB
 ip_tunnel_init_net+0x321/0x990 net/ipv4/ip_tunnel.c:1034
skbuff_fclone_cache        577KB        630KB
skbuff_head_cache       8087KB       8130KB
configfs_dir_cache          3KB         11KB
file_lock_cache           14KB         19KB
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:316
file_lock_ctx             10KB         15KB
fsnotify_mark_connector          4KB         15KB
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
net_namespace          24666KB      24666KB
shmem_inode_cache       8118KB       8493KB
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
task_delay_info         2123KB       2968KB
taskstats                 13KB         53KB
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
proc_dir_entry        129542KB     129547KB
pde_opener                 2KB         23KB
seq_file                  58KB         70KB
sigqueue                 502KB        504KB
kernfs_node_cache     416709KB     416713KB
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
mnt_cache               1016KB       1020KB
filp                    5110KB       7410KB
names_cache            44807KB      44837KB
iint_cache                91KB        103KB
RIP: 0033:0x7f820575afe9
Code: Bad RIP value.
RSP: 002b:00007f82040af118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
key_jar                    6KB         11KB

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/01/19 15:57 linux-4.19.y 3f8a27f9e27b 0620189b .config console log report info ci2-linux-4-19 INFO: task hung in fib6_rules_net_exit
* Struck through repros no longer work on HEAD.