syzkaller login: [  882.401728] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.166' (ECDSA) to the list of known hosts.
[  887.960614] random: sshd: uninitialized urandom read (32 bytes read)
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[  888.084787] audit: type=1400 audit(1580548331.122:36): avc:  denied  { map } for  pid=7322 comm="syz-executor879" path="/root/syz-executor879086224" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
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[ 1144.790243] INFO: task syz-executor879:7614 blocked for more than 140 seconds.
[ 1144.790250]       Not tainted 4.14.169-syzkaller #0
[ 1144.790253] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1144.790258] syz-executor879 D27952  7614   7323 0x00000004
[ 1144.790331] Call Trace:
[ 1144.824191]  __schedule+0x7b8/0x1cd0
[ 1144.827946]  ? __mutex_lock+0x737/0x1470
[ 1144.832383]  ? firmware_map_remove+0x196/0x196
[ 1144.837140]  schedule+0x92/0x1c0
[ 1144.840881]  schedule_preempt_disabled+0x13/0x20
[ 1144.846569]  __mutex_lock+0x73c/0x1470
[ 1144.851267]  ? save_trace+0x290/0x290
[ 1144.855135]  ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1144.861290]  ? mutex_trylock+0x1c0/0x1c0
[ 1144.865380]  ? save_trace+0x290/0x290
[ 1144.869256]  ? xt_find_match+0x14d/0x1e0
[ 1144.874050]  mutex_lock_nested+0x16/0x20
[ 1144.878206]  ? mutex_lock_nested+0x16/0x20
[ 1144.882742]  hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1144.888546]  hashlimit_mt_check+0x9a/0xc0
[ 1144.893148]  ? hashlimit_mt_check_common.isra.0+0x11b0/0x11b0
[ 1144.899062]  xt_check_match+0x254/0x530
[ 1144.904054]  ? xt_check_target+0x510/0x510
[ 1144.908294]  ? wait_for_completion+0x420/0x420
[ 1144.913381]  ? mutex_unlock+0xd/0x10
[ 1144.917104]  ? xt_find_match+0x178/0x1e0
[ 1144.921457]  ? xt_request_find_match+0x4b/0xe0
[ 1144.926131]  find_check_entry.isra.0+0x2f9/0x920
[ 1144.931315]  ? ipt_do_table+0x1770/0x1770
[ 1144.935530]  ? kfree+0x183/0x270
[ 1144.938919]  ? kvfree+0x4d/0x60
[ 1144.942559]  ? trace_hardirqs_on_caller+0x400/0x590
[ 1144.947590]  ? trace_hardirqs_on+0xd/0x10
[ 1144.952213]  translate_table+0xb3f/0x15a0
[ 1144.956377]  ? __do_replace+0x5b0/0x5b0
[ 1144.960666]  ? _copy_from_user+0x99/0x110
[ 1144.964841]  do_ipt_set_ctl+0x268/0x3ee
[ 1144.968829]  ? compat_do_ipt_set_ctl+0x150/0x150
[ 1144.974027]  ? mutex_unlock+0xd/0x10
[ 1144.977881]  ? nf_sockopt_find.constprop.0+0x1b7/0x230
[ 1144.983526]  nf_setsockopt+0x67/0xc0
[ 1144.987326]  ip_setsockopt+0x9b/0xb0
[ 1144.991518]  tcp_setsockopt+0x84/0xd0
[ 1144.995380]  sock_common_setsockopt+0x94/0xd0
[ 1144.999890]  SyS_setsockopt+0x13c/0x210
[ 1145.004627]  ? SyS_recv+0x40/0x40
[ 1145.008148]  ? do_syscall_64+0x53/0x640
[ 1145.012672]  ? SyS_recv+0x40/0x40
[ 1145.016136]  do_syscall_64+0x1e8/0x640
[ 1145.020530]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 1145.025626]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 1145.033467] RIP: 0033:0x441269
[ 1145.036671] RSP: 002b:00007ffc42e7e808 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[ 1145.044742] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269
[ 1145.052223] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003
[ 1145.059590] RBP: 00000000000d9a3a R08: 0000000000000400 R09: 00000000004002c8
[ 1145.067357] R10: 0000000020000600 R11: 0000000000000246 R12: 0000000000401fe0
[ 1145.074750] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000
[ 1145.082803] INFO: task syz-executor879:7615 blocked for more than 140 seconds.
[ 1145.090329]       Not tainted 4.14.169-syzkaller #0
[ 1145.095447] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1145.103843] syz-executor879 D28528  7615   7326 0x00000004
[ 1145.109502] Call Trace:
[ 1145.112856]  __schedule+0x7b8/0x1cd0
[ 1145.116585]  ? __mutex_lock+0x737/0x1470
[ 1145.120905]  ? firmware_map_remove+0x196/0x196
[ 1145.125655]  schedule+0x92/0x1c0
[ 1145.129034]  schedule_preempt_disabled+0x13/0x20
[ 1145.134417]  __mutex_lock+0x73c/0x1470
[ 1145.138333]  ? trace_hardirqs_on_caller+0x400/0x590
[ 1145.143714]  ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1145.149658]  ? mutex_trylock+0x1c0/0x1c0
[ 1145.154093]  ? save_trace+0x290/0x290
[ 1145.157925]  ? xt_find_match+0x14d/0x1e0
[ 1145.163019]  mutex_lock_nested+0x16/0x20
[ 1145.167097]  ? mutex_lock_nested+0x16/0x20
[ 1145.171591]  hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1145.177432]  hashlimit_mt_check+0x9a/0xc0
[ 1145.181918]  ? hashlimit_mt_check_common.isra.0+0x11b0/0x11b0
[ 1145.187823]  xt_check_match+0x254/0x530
[ 1145.192234]  ? xt_check_target+0x510/0x510
[ 1145.196486]  ? wait_for_completion+0x420/0x420
[ 1145.201387]  ? mutex_unlock+0xd/0x10
[ 1145.205127]  ? xt_find_match+0x178/0x1e0
[ 1145.209337]  ? xt_request_find_match+0x4b/0xe0
[ 1145.214281]  find_check_entry.isra.0+0x2f9/0x920
[ 1145.219079]  ? ipt_do_table+0x1770/0x1770
[ 1145.223610]  ? kfree+0x183/0x270
[ 1145.226992]  ? kvfree+0x4d/0x60
[ 1145.230951]  ? trace_hardirqs_on_caller+0x400/0x590
[ 1145.236006]  ? trace_hardirqs_on+0xd/0x10
[ 1145.240490]  translate_table+0xb3f/0x15a0
[ 1145.244785]  ? __do_replace+0x5b0/0x5b0
[ 1145.248788]  ? _copy_from_user+0x99/0x110
[ 1145.253365]  do_ipt_set_ctl+0x268/0x3ee
[ 1145.257442]  ? compat_do_ipt_set_ctl+0x150/0x150
[ 1145.262537]  ? mutex_unlock+0xd/0x10
[ 1145.266270]  ? nf_sockopt_find.constprop.0+0x1b7/0x230
[ 1145.271947]  nf_setsockopt+0x67/0xc0
[ 1145.275697]  ip_setsockopt+0x9b/0xb0
[ 1145.279526]  tcp_setsockopt+0x84/0xd0
[ 1145.283774]  sock_common_setsockopt+0x94/0xd0
[ 1145.288285]  SyS_setsockopt+0x13c/0x210
[ 1145.293210]  ? SyS_recv+0x40/0x40
[ 1145.296701]  ? do_syscall_64+0x53/0x640
[ 1145.301043]  ? SyS_recv+0x40/0x40
[ 1145.304654]  do_syscall_64+0x1e8/0x640
[ 1145.308548]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 1145.313824]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 1145.319036] RIP: 0033:0x441269
[ 1145.322576] RSP: 002b:00007ffc42e7e808 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[ 1145.330454] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269
[ 1145.337724] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003
[ 1145.345490] RBP: 00000000000d9a2c R08: 0000000000000400 R09: 00000000004002c8
[ 1145.353477] R10: 0000000020000600 R11: 0000000000000246 R12: 0000000000401fe0
[ 1145.361403] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000
[ 1145.368843] INFO: task syz-executor879:7616 blocked for more than 140 seconds.
[ 1145.376704]       Not tainted 4.14.169-syzkaller #0
[ 1145.381769] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1145.389753] syz-executor879 D28528  7616   7324 0x00000004
[ 1145.395831] Call Trace:
[ 1145.398609]  __schedule+0x7b8/0x1cd0
[ 1145.402794]  ? __mutex_lock+0x737/0x1470
[ 1145.406876]  ? firmware_map_remove+0x196/0x196
[ 1145.411987]  schedule+0x92/0x1c0
[ 1145.415366]  schedule_preempt_disabled+0x13/0x20
[ 1145.421124]  __mutex_lock+0x73c/0x1470
[ 1145.425080]  ? trace_hardirqs_on_caller+0x400/0x590
[ 1145.430441]  ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1145.436266]  ? mutex_trylock+0x1c0/0x1c0
[ 1145.440687]  ? save_trace+0x290/0x290
[ 1145.444567]  ? xt_find_match+0x14d/0x1e0
[ 1145.448749]  mutex_lock_nested+0x16/0x20
[ 1145.453278]  ? mutex_lock_nested+0x16/0x20
[ 1145.457550]  hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1145.463561]  hashlimit_mt_check+0x9a/0xc0
[ 1145.467719]  ? hashlimit_mt_check_common.isra.0+0x11b0/0x11b0
[ 1145.474016]  xt_check_match+0x254/0x530
[ 1145.478004]  ? xt_check_target+0x510/0x510
[ 1145.483569]  ? wait_for_completion+0x420/0x420
[ 1145.488180]  ? mutex_unlock+0xd/0x10
[ 1145.492378]  ? xt_find_match+0x178/0x1e0
[ 1145.496459]  ? xt_request_find_match+0x4b/0xe0
[ 1145.501365]  find_check_entry.isra.0+0x2f9/0x920
[ 1145.506151]  ? ipt_do_table+0x1770/0x1770
[ 1145.510695]  ? kfree+0x183/0x270
[ 1145.514086]  ? kvfree+0x4d/0x60
[ 1145.517375]  ? trace_hardirqs_on_caller+0x400/0x590
[ 1145.522854]  ? trace_hardirqs_on+0xd/0x10
[ 1145.527028]  translate_table+0xb3f/0x15a0
[ 1145.531584]  ? __do_replace+0x5b0/0x5b0
[ 1145.535575]  ? _copy_from_user+0x99/0x110
[ 1145.539915]  do_ipt_set_ctl+0x268/0x3ee
[ 1145.544239]  ? compat_do_ipt_set_ctl+0x150/0x150
[ 1145.549016]  ? mutex_unlock+0xd/0x10
[ 1145.553877]  ? nf_sockopt_find.constprop.0+0x1b7/0x230
[ 1145.559188]  nf_setsockopt+0x67/0xc0
[ 1145.563306]  ip_setsockopt+0x9b/0xb0
[ 1145.567168]  tcp_setsockopt+0x84/0xd0
[ 1145.571351]  sock_common_setsockopt+0x94/0xd0
[ 1145.576025]  SyS_setsockopt+0x13c/0x210
[ 1145.580354]  ? SyS_recv+0x40/0x40
[ 1145.583844]  ? do_syscall_64+0x53/0x640
[ 1145.587828]  ? SyS_recv+0x40/0x40
[ 1145.591683]  do_syscall_64+0x1e8/0x640
[ 1145.595583]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 1145.600739]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 1145.606689] RIP: 0033:0x441269
[ 1145.609902] RSP: 002b:00007ffc42e7e808 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[ 1145.618025] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269
[ 1145.625385] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003
[ 1145.633148] RBP: 00000000000d9a38 R08: 0000000000000400 R09: 00000000004002c8
[ 1145.640457] R10: 0000000020000600 R11: 0000000000000246 R12: 0000000000401fe0
[ 1145.647726] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000
[ 1145.655442] INFO: task syz-executor879:7617 blocked for more than 140 seconds.
[ 1145.662867]       Not tainted 4.14.169-syzkaller #0
[ 1145.667880] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1145.676218] syz-executor879 D28528  7617   7325 0x00000004
[ 1145.682820] Call Trace:
[ 1145.685453]  __schedule+0x7b8/0x1cd0
[ 1145.689172]  ? __mutex_lock+0x737/0x1470
[ 1145.694680]  ? firmware_map_remove+0x196/0x196
[ 1145.699404]  schedule+0x92/0x1c0
[ 1145.703141]  schedule_preempt_disabled+0x13/0x20
[ 1145.707950]  __mutex_lock+0x73c/0x1470
[ 1145.712377]  ? save_trace+0x290/0x290
[ 1145.716210]  ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1145.722359]  ? mutex_trylock+0x1c0/0x1c0
[ 1145.726448]  ? save_trace+0x290/0x290
[ 1145.730633]  ? xt_find_match+0x14d/0x1e0
[ 1145.734711]  mutex_lock_nested+0x16/0x20
[ 1145.738791]  ? mutex_lock_nested+0x16/0x20
[ 1145.743375]  hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1145.749219]  hashlimit_mt_check+0x9a/0xc0
[ 1145.753995]  ? hashlimit_mt_check_common.isra.0+0x11b0/0x11b0
[ 1145.760135]  xt_check_match+0x254/0x530
[ 1145.764324]  ? xt_check_target+0x510/0x510
[ 1145.768579]  ? wait_for_completion+0x420/0x420
[ 1145.773537]  ? mutex_unlock+0xd/0x10
[ 1145.777274]  ? xt_find_match+0x178/0x1e0
[ 1145.781767]  ? xt_request_find_match+0x4b/0xe0
[ 1145.786555]  find_check_entry.isra.0+0x2f9/0x920
[ 1145.791732]  ? ipt_do_table+0x1770/0x1770
[ 1145.796059]  ? kfree+0x183/0x270
[ 1145.799431]  ? kvfree+0x4d/0x60
[ 1145.803175]  ? trace_hardirqs_on_caller+0x400/0x590
[ 1145.808221]  ? trace_hardirqs_on+0xd/0x10
[ 1145.813482]  translate_table+0xb3f/0x15a0
[ 1145.817683]  ? __do_replace+0x5b0/0x5b0
[ 1145.822538]  ? _copy_from_user+0x99/0x110
[ 1145.826846]  do_ipt_set_ctl+0x268/0x3ee
[ 1145.831191]  ? compat_do_ipt_set_ctl+0x150/0x150
[ 1145.835988]  ? mutex_unlock+0xd/0x10
[ 1145.839770]  ? nf_sockopt_find.constprop.0+0x1b7/0x230
[ 1145.845429]  nf_setsockopt+0x67/0xc0
[ 1145.849157]  ip_setsockopt+0x9b/0xb0
[ 1145.853513]  tcp_setsockopt+0x84/0xd0
[ 1145.857329]  sock_common_setsockopt+0x94/0xd0
[ 1145.862185]  SyS_setsockopt+0x13c/0x210
[ 1145.866196]  ? SyS_recv+0x40/0x40
[ 1145.869654]  ? do_syscall_64+0x53/0x640
[ 1145.874030]  ? SyS_recv+0x40/0x40
[ 1145.877501]  do_syscall_64+0x1e8/0x640
[ 1145.881712]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 1145.886575]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 1145.892210] RIP: 0033:0x441269
[ 1145.895673] RSP: 002b:00007ffc42e7e808 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[ 1145.903742] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269
[ 1145.911206] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003
[ 1145.918508] RBP: 00000000000d9a38 R08: 0000000000000400 R09: 00000000004002c8
[ 1145.926172] R10: 0000000020000600 R11: 0000000000000246 R12: 0000000000401fe0
[ 1145.933511] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000
[ 1145.941896] INFO: task syz-executor879:7618 blocked for more than 140 seconds.
[ 1145.949425]       Not tainted 4.14.169-syzkaller #0
[ 1145.954931] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1145.963595] syz-executor879 D28528  7618   7327 0x00000004
[ 1145.969418] Call Trace:
[ 1145.972673]  __schedule+0x7b8/0x1cd0
[ 1145.976586]  ? __mutex_lock+0x737/0x1470
[ 1145.981185]  ? firmware_map_remove+0x196/0x196
[ 1145.985831]  schedule+0x92/0x1c0
[ 1145.989237]  schedule_preempt_disabled+0x13/0x20
[ 1145.994748]  __mutex_lock+0x73c/0x1470
[ 1145.998648]  ? trace_hardirqs_on_caller+0x400/0x590
[ 1146.004153]  ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1146.009968]  ? mutex_trylock+0x1c0/0x1c0
[ 1146.014543]  ? save_trace+0x290/0x290
[ 1146.018364]  ? xt_find_match+0x14d/0x1e0
[ 1146.022786]  mutex_lock_nested+0x16/0x20
[ 1146.026868]  ? mutex_lock_nested+0x16/0x20
[ 1146.031454]  hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1146.037188]  hashlimit_mt_check+0x9a/0xc0
[ 1146.041898]  ? hashlimit_mt_check_common.isra.0+0x11b0/0x11b0
[ 1146.047809]  xt_check_match+0x254/0x530
[ 1146.052258]  ? xt_check_target+0x510/0x510
[ 1146.056535]  ? wait_for_completion+0x420/0x420
[ 1146.061469]  ? mutex_unlock+0xd/0x10
[ 1146.065212]  ? xt_find_match+0x178/0x1e0
[ 1146.069431]  ? xt_request_find_match+0x4b/0xe0
[ 1146.075135]  find_check_entry.isra.0+0x2f9/0x920
[ 1146.080001]  ? ipt_do_table+0x1770/0x1770
[ 1146.084423]  ? kfree+0x183/0x270
[ 1146.087814]  ? kvfree+0x4d/0x60
[ 1146.091544]  ? trace_hardirqs_on_caller+0x400/0x590
[ 1146.097233]  ? trace_hardirqs_on+0xd/0x10
[ 1146.101722]  translate_table+0xb3f/0x15a0
[ 1146.105929]  ? __do_replace+0x5b0/0x5b0
[ 1146.109907]  ? _copy_from_user+0x99/0x110
[ 1146.114526]  do_ipt_set_ctl+0x268/0x3ee
[ 1146.118681]  ? compat_do_ipt_set_ctl+0x150/0x150
[ 1146.123893]  ? mutex_unlock+0xd/0x10
[ 1146.127665]  ? nf_sockopt_find.constprop.0+0x1b7/0x230
[ 1146.133329]  nf_setsockopt+0x67/0xc0
[ 1146.137164]  ip_setsockopt+0x9b/0xb0
[ 1146.141232]  tcp_setsockopt+0x84/0xd0
[ 1146.145241]  sock_common_setsockopt+0x94/0xd0
[ 1146.149758]  SyS_setsockopt+0x13c/0x210
[ 1146.154179]  ? SyS_recv+0x40/0x40
[ 1146.157654]  ? do_syscall_64+0x53/0x640
[ 1146.162089]  ? SyS_recv+0x40/0x40
[ 1146.165924]  do_syscall_64+0x1e8/0x640
[ 1146.169815]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 1146.175121]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 1146.180361] RIP: 0033:0x441269
[ 1146.183579] RSP: 002b:00007ffc42e7e808 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[ 1146.192195] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269
[ 1146.199789] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003
[ 1146.208394] RBP: 00000000000d9a32 R08: 0000000000000400 R09: 00000000004002c8
[ 1146.216160] R10: 0000000020000600 R11: 0000000000000246 R12: 0000000000401fe0
[ 1146.224030] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000
[ 1146.231493] 
[ 1146.231493] Showing all locks held in the system:
[ 1146.238031] 1 lock held by khungtaskd/1057:
[ 1146.242493]  #0:  (tasklist_lock){.+.+}, at: [<ffffffff81488cf8>] debug_show_all_locks+0x7f/0x21f
[ 1146.251668] 2 locks held by getty/7297:
[ 1146.255919]  #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff86692003>] ldsem_down_read+0x33/0x40
[ 1146.264671]  #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c3816>] n_tty_read+0x1e6/0x17d0
[ 1146.274230] 2 locks held by getty/7298:
[ 1146.278201]  #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff86692003>] ldsem_down_read+0x33/0x40
[ 1146.286960]  #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c3816>] n_tty_read+0x1e6/0x17d0
[ 1146.296487] 2 locks held by getty/7299:
[ 1146.300482]  #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff86692003>] ldsem_down_read+0x33/0x40
[ 1146.309319]  #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c3816>] n_tty_read+0x1e6/0x17d0
[ 1146.318711] 2 locks held by getty/7300:
[ 1146.322721]  #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff86692003>] ldsem_down_read+0x33/0x40
[ 1146.331482]  #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c3816>] n_tty_read+0x1e6/0x17d0
[ 1146.340935] 2 locks held by getty/7301:
[ 1146.344903]  #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff86692003>] ldsem_down_read+0x33/0x40
[ 1146.353794]  #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c3816>] n_tty_read+0x1e6/0x17d0
[ 1146.363156] 2 locks held by getty/7302:
[ 1146.367144]  #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff86692003>] ldsem_down_read+0x33/0x40
[ 1146.375917]  #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c3816>] n_tty_read+0x1e6/0x17d0
[ 1146.385606] 2 locks held by getty/7303:
[ 1146.389609]  #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff86692003>] ldsem_down_read+0x33/0x40
[ 1146.399077]  #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c3816>] n_tty_read+0x1e6/0x17d0
[ 1146.408445] 1 lock held by syz-executor879/7614:
[ 1146.413265]  #0:  (hashlimit_mutex){+.+.}, at: [<ffffffff854ff908>] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1146.424463] 1 lock held by syz-executor879/7615:
[ 1146.429228]  #0:  (hashlimit_mutex){+.+.}, at: [<ffffffff854ff908>] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1146.439746] 1 lock held by syz-executor879/7616:
[ 1146.444552]  #0:  (hashlimit_mutex){+.+.}, at: [<ffffffff854ff908>] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1146.455172] 1 lock held by syz-executor879/7617:
[ 1146.460011]  #0:  (hashlimit_mutex){+.+.}, at: [<ffffffff854ff908>] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1146.470581] 1 lock held by syz-executor879/7618:
[ 1146.475392]  #0:  (hashlimit_mutex){+.+.}, at: [<ffffffff854ff908>] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0
[ 1146.485913] 
[ 1146.487542] =============================================
[ 1146.487542] 
[ 1146.496098] NMI backtrace for cpu 0
[ 1146.499765] CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 4.14.169-syzkaller #0
[ 1146.507217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 1146.516761] Call Trace:
[ 1146.519436]  dump_stack+0x142/0x197
[ 1146.523122]  nmi_cpu_backtrace.cold+0x57/0x94
[ 1146.527970]  ? irq_force_complete_move.cold+0x7d/0x7d
[ 1146.533263]  nmi_trigger_cpumask_backtrace+0x141/0x189
[ 1146.538564]  arch_trigger_cpumask_backtrace+0x14/0x20
[ 1146.543962]  watchdog+0x5e7/0xb90
[ 1146.547503]  kthread+0x319/0x430
[ 1146.550873]  ? hungtask_pm_notify+0x50/0x50
[ 1146.555467]  ? kthread_create_on_node+0xd0/0xd0
[ 1146.560139]  ret_from_fork+0x24/0x30
[ 1146.564052] Sending NMI from CPU 0 to CPUs 1:
[ 1146.569028] NMI backtrace for cpu 1
[ 1146.569032] CPU: 1 PID: 7610 Comm: syz-executor879 Not tainted 4.14.169-syzkaller #0
[ 1146.569035] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 1146.569038] task: ffff888096d2e140 task.stack: ffff88807fb38000
[ 1146.569040] RIP: 0010:match_held_lock+0x92/0x5f0
[ 1146.569043] RSP: 0018:ffff88807fb3f748 EFLAGS: 00000806
[ 1146.569047] RAX: ffff888096d2e9e2 RBX: ffff888096d2e9c0 RCX: ffff888096d2e9c0
[ 1146.569050] RDX: 0000000000000000 RSI: ffffffff87f84ea0 RDI: ffff888096d2e9e2
[ 1146.569053] RBP: ffff88807fb3f7c0 R08: 0000000000000001 R09: ffff888096d2e9e0
[ 1146.569056] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87f84ea0
[ 1146.569059] R13: 1ffff1100ff67eeb R14: ffffffff87f84ea0 R15: ffff88807fb3f798
[ 1146.569062] FS:  0000000001813880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
[ 1146.569064] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1146.569067] CR2: 00000000006cd080 CR3: 0000000092618000 CR4: 00000000001406e0
[ 1146.569070] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1146.569073] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1146.569074] Call Trace:
[ 1146.569076]  ? save_trace+0x290/0x290
[ 1146.569078]  ? find_held_lock+0x35/0x130
[ 1146.569080]  __lock_is_held+0xb6/0x140
[ 1146.569082]  ? mark_held_locks+0xb1/0x100
[ 1146.569084]  ? esp_mt+0x3c0/0x3c0
[ 1146.569086]  lock_is_held_type+0x110/0x210
[ 1146.569088]  ___might_sleep+0x1f4/0x2b0
[ 1146.569090]  ? esp_mt+0x3c0/0x3c0
[ 1146.569092]  htable_selective_cleanup+0x217/0x300
[ 1146.569094]  htable_put+0x164/0x210
[ 1146.569096]  ? htable_put+0x210/0x210
[ 1146.569098]  hashlimit_mt_destroy+0x56/0x70
[ 1146.569100]  cleanup_match+0xc2/0x140
[ 1146.569102]  ? icmp_checkentry+0x90/0x90
[ 1146.569104]  ? xt_request_find_target+0x4b/0xe0
[ 1146.569106]  find_check_entry.isra.0+0x3fe/0x920
[ 1146.569108]  ? ipt_do_table+0x1770/0x1770
[ 1146.569110]  ? kfree+0x183/0x270
[ 1146.569111]  ? kvfree+0x4d/0x60
[ 1146.569113]  translate_table+0xb3f/0x15a0
[ 1146.569115]  ? __do_replace+0x5b0/0x5b0
[ 1146.569117]  ? _copy_from_user+0x99/0x110
[ 1146.569119]  do_ipt_set_ctl+0x268/0x3ee
[ 1146.569121]  ? compat_do_ipt_set_ctl+0x150/0x150
[ 1146.569123]  ? mutex_unlock+0xd/0x10
[ 1146.569126]  ? nf_sockopt_find.constprop.0+0x1b7/0x230
[ 1146.569127]  nf_setsockopt+0x67/0xc0
[ 1146.569129]  ip_setsockopt+0x9b/0xb0
[ 1146.569131]  tcp_setsockopt+0x84/0xd0
[ 1146.569133]  sock_common_setsockopt+0x94/0xd0
[ 1146.569135]  SyS_setsockopt+0x13c/0x210
[ 1146.569137]  ? SyS_recv+0x40/0x40
[ 1146.569139]  ? do_syscall_64+0x53/0x640
[ 1146.569141]  ? SyS_recv+0x40/0x40
[ 1146.569143]  do_syscall_64+0x1e8/0x640
[ 1146.569145]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 1146.569147]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 1146.569149] RIP: 0033:0x441269
[ 1146.569151] RSP: 002b:00007ffc42e7e808 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[ 1146.569156] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269
[ 1146.569159] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003
[ 1146.569162] RBP: 00000000000d9a23 R08: 0000000000000400 R09: 00000000004002c8
[ 1146.569165] R10: 0000000020000600 R11: 0000000000000246 R12: 0000000000401fe0
[ 1146.569168] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000
[ 1146.569169] Code: 85 8e 04 00 00 4c 39 73 10 0f 84 71 02 00 00 48 8d 7b 22 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 <83> e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 6a 03 00 00 66 f7 43 
[ 1146.569950] Kernel panic - not syncing: hung_task: blocked tasks
[ 1146.906481] CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 4.14.169-syzkaller #0
[ 1146.914041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 1146.923610] Call Trace:
[ 1146.926318]  dump_stack+0x142/0x197
[ 1146.930032]  panic+0x1f9/0x42d
[ 1146.933228]  ? add_taint.cold+0x16/0x16
[ 1146.937320]  ? ___preempt_schedule+0x16/0x18
[ 1146.941779]  watchdog+0x5f8/0xb90
[ 1146.945239]  kthread+0x319/0x430
[ 1146.948625]  ? hungtask_pm_notify+0x50/0x50
[ 1146.953314]  ? kthread_create_on_node+0xd0/0xd0
[ 1146.957993]  ret_from_fork+0x24/0x30
[ 1146.962821] Kernel Offset: disabled
[ 1146.966512] Rebooting in 86400 seconds..