[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 31.676812] random: sshd: uninitialized urandom read (32 bytes read) [ 31.987968] kauditd_printk_skb: 10 callbacks suppressed [ 31.987976] audit: type=1400 audit(1577252283.480:35): avc: denied { map } for pid=7013 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 32.051714] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.635320] random: sshd: uninitialized urandom read (32 bytes read) [ 886.441595] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.19' (ECDSA) to the list of known hosts. [ 892.004986] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 892.121245] audit: type=1400 audit(1577253143.620:36): avc: denied { map } for pid=7027 comm="syz-executor351" path="/root/syz-executor351789977" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1144.790194] INFO: task syz-executor351:8051 blocked for more than 140 seconds. [ 1144.797765] Not tainted 4.14.160-syzkaller #0 [ 1144.803817] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1144.811825] syz-executor351 D28528 8051 7031 0x00000004 [ 1144.817514] Call Trace: [ 1144.820336] __schedule+0x7b8/0x1cd0 [ 1144.824053] ? __mutex_lock+0x737/0x1470 [ 1144.828127] ? firmware_map_remove+0x196/0x196 [ 1144.832890] schedule+0x92/0x1c0 [ 1144.836259] schedule_preempt_disabled+0x13/0x20 [ 1144.841175] __mutex_lock+0x73c/0x1470 [ 1144.845144] ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1144.851078] ? mutex_trylock+0x1c0/0x1c0 [ 1144.855215] ? save_trace+0x290/0x290 [ 1144.859419] ? find_next_bit+0x28/0x30 [ 1144.863514] ? pcpu_alloc+0xcf0/0x1050 [ 1144.867409] mutex_lock_nested+0x16/0x20 [ 1144.871584] ? mutex_lock_nested+0x16/0x20 [ 1144.875818] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1144.881571] hashlimit_mt_check_v2+0x304/0x390 [ 1144.886149] ? hashlimit_mt_check+0xc0/0xc0 [ 1144.890594] ? hashlimit_mt_check+0xc0/0xc0 [ 1144.894917] xt_check_match+0x254/0x530 [ 1144.898884] ? xt_check_target+0x510/0x510 [ 1144.903238] ? wait_for_completion+0x420/0x420 [ 1144.907823] ? mutex_unlock+0xd/0x10 [ 1144.911788] ? xt_find_match+0x178/0x1e0 [ 1144.915860] ? xt_request_find_match+0x4b/0xe0 [ 1144.920663] find_check_entry.isra.0+0x2f9/0x920 [ 1144.925600] ? ipt_do_table+0x1770/0x1770 [ 1144.929771] ? kfree+0x183/0x270 [ 1144.933293] ? kvfree+0x4d/0x60 [ 1144.936578] ? trace_hardirqs_on_caller+0x400/0x590 [ 1144.941713] ? trace_hardirqs_on+0xd/0x10 [ 1144.945864] translate_table+0xb3f/0x15a0 [ 1144.950134] ? __do_replace+0x5b0/0x5b0 [ 1144.954144] ? _copy_from_user+0x99/0x110 [ 1144.958298] do_ipt_set_ctl+0x268/0x3ee [ 1144.962473] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1144.967241] ? mutex_unlock+0xd/0x10 [ 1144.971156] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1144.976440] nf_setsockopt+0x67/0xc0 [ 1144.980303] ip_setsockopt+0x9b/0xb0 [ 1144.984049] udp_setsockopt+0x4e/0x90 [ 1144.987858] sock_common_setsockopt+0x94/0xd0 [ 1144.992480] SyS_setsockopt+0x13c/0x210 [ 1144.996454] ? SyS_recv+0x40/0x40 [ 1144.999899] ? do_syscall_64+0x53/0x640 [ 1145.004000] ? SyS_recv+0x40/0x40 [ 1145.007452] do_syscall_64+0x1e8/0x640 [ 1145.011448] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1145.016293] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1145.021615] RIP: 0033:0x4412b9 [ 1145.024800] RSP: 002b:00007ffd14f846a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1145.032638] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 1145.039904] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1145.047298] RBP: 00000000000db1e1 R08: 0000000000000001 R09: 00000000004002c8 [ 1145.054604] R10: 0000000020000500 R11: 0000000000000246 R12: 0000000000402030 [ 1145.061996] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 1145.069281] INFO: task syz-executor351:8052 blocked for more than 140 seconds. [ 1145.076752] Not tainted 4.14.160-syzkaller #0 [ 1145.081794] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1145.089755] syz-executor351 D28528 8052 7033 0x00000004 [ 1145.095525] Call Trace: [ 1145.098111] __schedule+0x7b8/0x1cd0 [ 1145.101933] ? __mutex_lock+0x737/0x1470 [ 1145.105996] ? firmware_map_remove+0x196/0x196 [ 1145.111048] schedule+0x92/0x1c0 [ 1145.114420] schedule_preempt_disabled+0x13/0x20 [ 1145.119163] __mutex_lock+0x73c/0x1470 [ 1145.123343] ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1145.129144] ? mutex_trylock+0x1c0/0x1c0 [ 1145.133316] ? save_trace+0x290/0x290 [ 1145.137113] ? find_next_bit+0x28/0x30 [ 1145.141141] ? pcpu_alloc+0xcf0/0x1050 [ 1145.145033] mutex_lock_nested+0x16/0x20 [ 1145.149084] ? mutex_lock_nested+0x16/0x20 [ 1145.153442] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1145.159065] hashlimit_mt_check_v2+0x304/0x390 [ 1145.163757] ? hashlimit_mt_check+0xc0/0xc0 [ 1145.168085] ? hashlimit_mt_check+0xc0/0xc0 [ 1145.172519] xt_check_match+0x254/0x530 [ 1145.176495] ? xt_check_target+0x510/0x510 [ 1145.180854] ? wait_for_completion+0x420/0x420 [ 1145.185437] ? mutex_unlock+0xd/0x10 [ 1145.189142] ? xt_find_match+0x178/0x1e0 [ 1145.193323] ? xt_request_find_match+0x4b/0xe0 [ 1145.197919] find_check_entry.isra.0+0x2f9/0x920 [ 1145.202859] ? ipt_do_table+0x1770/0x1770 [ 1145.207021] ? kfree+0x183/0x270 [ 1145.210535] ? kvfree+0x4d/0x60 [ 1145.213815] ? trace_hardirqs_on_caller+0x400/0x590 [ 1145.218832] ? trace_hardirqs_on+0xd/0x10 [ 1145.223124] translate_table+0xb3f/0x15a0 [ 1145.227284] ? __do_replace+0x5b0/0x5b0 [ 1145.231374] ? _copy_from_user+0x99/0x110 [ 1145.235621] do_ipt_set_ctl+0x268/0x3ee [ 1145.239588] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1145.244477] ? mutex_unlock+0xd/0x10 [ 1145.248187] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1145.253567] nf_setsockopt+0x67/0xc0 [ 1145.257279] ip_setsockopt+0x9b/0xb0 [ 1145.261111] udp_setsockopt+0x4e/0x90 [ 1145.264909] sock_common_setsockopt+0x94/0xd0 [ 1145.269396] SyS_setsockopt+0x13c/0x210 [ 1145.273485] ? SyS_recv+0x40/0x40 [ 1145.276944] ? do_syscall_64+0x53/0x640 [ 1145.281029] ? SyS_recv+0x40/0x40 [ 1145.284484] do_syscall_64+0x1e8/0x640 [ 1145.288365] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1145.293323] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1145.298517] RIP: 0033:0x4412b9 [ 1145.301816] RSP: 002b:00007ffd14f846a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1145.309525] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 1145.316915] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1145.324214] RBP: 00000000000db1ee R08: 0000000000000001 R09: 00000000004002c8 [ 1145.332009] R10: 0000000020000500 R11: 0000000000000246 R12: 0000000000402030 [ 1145.339275] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 1145.346689] INFO: task syz-executor351:8053 blocked for more than 140 seconds. [ 1145.354070] Not tainted 4.14.160-syzkaller #0 [ 1145.359084] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1145.367180] syz-executor351 D28528 8053 7028 0x00000004 [ 1145.372839] Call Trace: [ 1145.375423] __schedule+0x7b8/0x1cd0 [ 1145.379128] ? __mutex_lock+0x737/0x1470 [ 1145.383325] ? firmware_map_remove+0x196/0x196 [ 1145.387913] schedule+0x92/0x1c0 [ 1145.391400] schedule_preempt_disabled+0x13/0x20 [ 1145.396151] __mutex_lock+0x73c/0x1470 [ 1145.400148] ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1145.405946] ? mutex_trylock+0x1c0/0x1c0 [ 1145.410007] ? save_trace+0x290/0x290 [ 1145.413919] ? find_next_bit+0x28/0x30 [ 1145.417796] ? pcpu_alloc+0xcf0/0x1050 [ 1145.421803] mutex_lock_nested+0x16/0x20 [ 1145.425859] ? mutex_lock_nested+0x16/0x20 [ 1145.430204] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1145.435833] hashlimit_mt_check_v2+0x304/0x390 [ 1145.440537] ? hashlimit_mt_check+0xc0/0xc0 [ 1145.444862] ? hashlimit_mt_check+0xc0/0xc0 [ 1145.449176] xt_check_match+0x254/0x530 [ 1145.453259] ? xt_check_target+0x510/0x510 [ 1145.457487] ? wait_for_completion+0x420/0x420 [ 1145.462187] ? mutex_unlock+0xd/0x10 [ 1145.465893] ? xt_find_match+0x178/0x1e0 [ 1145.469951] ? xt_request_find_match+0x4b/0xe0 [ 1145.474641] find_check_entry.isra.0+0x2f9/0x920 [ 1145.479402] ? ipt_do_table+0x1770/0x1770 [ 1145.483662] ? kfree+0x183/0x270 [ 1145.487028] ? kvfree+0x4d/0x60 [ 1145.490410] ? trace_hardirqs_on_caller+0x400/0x590 [ 1145.495423] ? trace_hardirqs_on+0xd/0x10 [ 1145.499583] translate_table+0xb3f/0x15a0 [ 1145.503864] ? __do_replace+0x5b0/0x5b0 [ 1145.507838] ? _copy_from_user+0x99/0x110 [ 1145.512089] do_ipt_set_ctl+0x268/0x3ee [ 1145.516064] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1145.520937] ? mutex_unlock+0xd/0x10 [ 1145.524652] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1145.529921] nf_setsockopt+0x67/0xc0 [ 1145.533772] ip_setsockopt+0x9b/0xb0 [ 1145.537483] udp_setsockopt+0x4e/0x90 [ 1145.541549] sock_common_setsockopt+0x94/0xd0 [ 1145.546041] SyS_setsockopt+0x13c/0x210 [ 1145.550009] ? SyS_recv+0x40/0x40 [ 1145.553574] ? do_syscall_64+0x53/0x640 [ 1145.557543] ? SyS_recv+0x40/0x40 [ 1145.561104] do_syscall_64+0x1e8/0x640 [ 1145.564987] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1145.569829] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1145.575155] RIP: 0033:0x4412b9 [ 1145.578343] RSP: 002b:00007ffd14f846a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1145.586172] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 1145.593483] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1145.600894] RBP: 00000000000db1f4 R08: 0000000000000001 R09: 00000000004002c8 [ 1145.608158] R10: 0000000020000500 R11: 0000000000000246 R12: 0000000000402030 [ 1145.615537] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 1145.622862] INFO: task syz-executor351:8054 blocked for more than 140 seconds. [ 1145.630335] Not tainted 4.14.160-syzkaller #0 [ 1145.635347] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1145.643431] syz-executor351 D28528 8054 7032 0x00000004 [ 1145.649063] Call Trace: [ 1145.651758] __schedule+0x7b8/0x1cd0 [ 1145.655470] ? __mutex_lock+0x737/0x1470 [ 1145.659524] ? firmware_map_remove+0x196/0x196 [ 1145.664333] schedule+0x92/0x1c0 [ 1145.667706] schedule_preempt_disabled+0x13/0x20 [ 1145.672592] __mutex_lock+0x73c/0x1470 [ 1145.676485] ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1145.682407] ? mutex_trylock+0x1c0/0x1c0 [ 1145.686466] ? save_trace+0x290/0x290 [ 1145.690374] ? find_next_bit+0x28/0x30 [ 1145.694263] ? pcpu_alloc+0xcf0/0x1050 [ 1145.698152] mutex_lock_nested+0x16/0x20 [ 1145.702346] ? mutex_lock_nested+0x16/0x20 [ 1145.706578] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1145.712311] hashlimit_mt_check_v2+0x304/0x390 [ 1145.716895] ? hashlimit_mt_check+0xc0/0xc0 [ 1145.721339] ? hashlimit_mt_check+0xc0/0xc0 [ 1145.725662] xt_check_match+0x254/0x530 [ 1145.729636] ? xt_check_target+0x510/0x510 [ 1145.734004] ? wait_for_completion+0x420/0x420 [ 1145.738586] ? mutex_unlock+0xd/0x10 [ 1145.742412] ? xt_find_match+0x178/0x1e0 [ 1145.746482] ? xt_request_find_match+0x4b/0xe0 [ 1145.751336] find_check_entry.isra.0+0x2f9/0x920 [ 1145.756100] ? ipt_do_table+0x1770/0x1770 [ 1145.760382] ? kfree+0x183/0x270 [ 1145.763749] ? kvfree+0x4d/0x60 [ 1145.767024] ? trace_hardirqs_on_caller+0x400/0x590 [ 1145.772175] ? trace_hardirqs_on+0xd/0x10 [ 1145.776326] translate_table+0xb3f/0x15a0 [ 1145.780601] ? __do_replace+0x5b0/0x5b0 [ 1145.784574] ? _copy_from_user+0x99/0x110 [ 1145.788715] do_ipt_set_ctl+0x268/0x3ee [ 1145.792815] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1145.797661] ? mutex_unlock+0xd/0x10 [ 1145.801502] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1145.806783] nf_setsockopt+0x67/0xc0 [ 1145.810721] ip_setsockopt+0x9b/0xb0 [ 1145.814432] udp_setsockopt+0x4e/0x90 [ 1145.818225] sock_common_setsockopt+0x94/0xd0 [ 1145.822957] SyS_setsockopt+0x13c/0x210 [ 1145.826931] ? SyS_recv+0x40/0x40 [ 1145.830597] ? do_syscall_64+0x53/0x640 [ 1145.834581] ? SyS_recv+0x40/0x40 [ 1145.838042] do_syscall_64+0x1e8/0x640 [ 1145.842263] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1145.847114] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1145.852546] RIP: 0033:0x4412b9 [ 1145.855732] RSP: 002b:00007ffd14f846a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1145.863759] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 1145.871065] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1145.878334] RBP: 00000000000db1f2 R08: 0000000000000001 R09: 00000000004002c8 [ 1145.885920] R10: 0000000020000500 R11: 0000000000000246 R12: 0000000000402030 [ 1145.893224] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 1145.900960] INFO: task syz-executor351:8055 blocked for more than 140 seconds. [ 1145.908337] Not tainted 4.14.160-syzkaller #0 [ 1145.913669] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1145.921673] syz-executor351 D28528 8055 7030 0x00000004 [ 1145.927309] Call Trace: [ 1145.929985] __schedule+0x7b8/0x1cd0 [ 1145.933986] ? __mutex_lock+0x737/0x1470 [ 1145.938051] ? firmware_map_remove+0x196/0x196 [ 1145.942936] schedule+0x92/0x1c0 [ 1145.946304] schedule_preempt_disabled+0x13/0x20 [ 1145.951269] __mutex_lock+0x73c/0x1470 [ 1145.955161] ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1145.961351] ? mutex_trylock+0x1c0/0x1c0 [ 1145.965408] ? save_trace+0x290/0x290 [ 1145.969200] ? find_next_bit+0x28/0x30 [ 1145.973332] ? pcpu_alloc+0xcf0/0x1050 [ 1145.977229] mutex_lock_nested+0x16/0x20 [ 1145.981545] ? mutex_lock_nested+0x16/0x20 [ 1145.985778] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1145.991689] hashlimit_mt_check_v2+0x304/0x390 [ 1145.996271] ? hashlimit_mt_check+0xc0/0xc0 [ 1146.000817] ? hashlimit_mt_check+0xc0/0xc0 [ 1146.005150] xt_check_match+0x254/0x530 [ 1146.009119] ? xt_check_target+0x510/0x510 [ 1146.013669] ? wait_for_completion+0x420/0x420 [ 1146.018268] ? mutex_unlock+0xd/0x10 [ 1146.022259] ? xt_find_match+0x178/0x1e0 [ 1146.026329] ? xt_request_find_match+0x4b/0xe0 [ 1146.031129] find_check_entry.isra.0+0x2f9/0x920 [ 1146.035890] ? ipt_do_table+0x1770/0x1770 [ 1146.040269] ? kfree+0x183/0x270 [ 1146.043636] ? kvfree+0x4d/0x60 [ 1146.046911] ? trace_hardirqs_on_caller+0x400/0x590 [ 1146.052145] ? trace_hardirqs_on+0xd/0x10 [ 1146.056302] translate_table+0xb3f/0x15a0 [ 1146.060680] ? __do_replace+0x5b0/0x5b0 [ 1146.064651] ? _copy_from_user+0x99/0x110 [ 1146.068794] do_ipt_set_ctl+0x268/0x3ee [ 1146.073040] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1146.077800] ? mutex_unlock+0xd/0x10 [ 1146.081740] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1146.087019] nf_setsockopt+0x67/0xc0 [ 1146.090950] ip_setsockopt+0x9b/0xb0 [ 1146.094660] udp_setsockopt+0x4e/0x90 [ 1146.098453] sock_common_setsockopt+0x94/0xd0 [ 1146.103171] SyS_setsockopt+0x13c/0x210 [ 1146.107230] ? SyS_recv+0x40/0x40 [ 1146.110900] ? do_syscall_64+0x53/0x640 [ 1146.114871] ? SyS_recv+0x40/0x40 [ 1146.118318] do_syscall_64+0x1e8/0x640 [ 1146.122423] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1146.127278] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1146.132754] RIP: 0033:0x4412b9 [ 1146.135947] RSP: 002b:00007ffd14f846a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1146.143882] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 1146.151171] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1146.158433] RBP: 00000000000db1ec R08: 0000000000000001 R09: 00000000004002c8 [ 1146.165976] R10: 0000000020000500 R11: 0000000000000246 R12: 0000000000402030 [ 1146.173434] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 1146.181021] [ 1146.181021] Showing all locks held in the system: [ 1146.187345] 1 lock held by khungtaskd/1044: [ 1146.191783] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f [ 1146.200873] 2 locks held by getty/7000: [ 1146.204833] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.213532] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.222948] 2 locks held by getty/7001: [ 1146.226909] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.235608] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.244924] 2 locks held by getty/7002: [ 1146.248883] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.257580] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.267039] 2 locks held by getty/7003: [ 1146.271026] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.279751] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.289099] 2 locks held by getty/7004: [ 1146.293107] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.301839] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.311154] 2 locks held by getty/7005: [ 1146.315115] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.323819] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.333129] 2 locks held by getty/7006: [ 1146.337089] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.345799] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.355121] 1 lock held by syz-executor351/8051: [ 1146.359862] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.370307] 1 lock held by syz-executor351/8052: [ 1146.375048] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.385521] 1 lock held by syz-executor351/8053: [ 1146.390295] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.400752] 1 lock held by syz-executor351/8054: [ 1146.405503] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.415966] 1 lock held by syz-executor351/8055: [ 1146.420734] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.431194] [ 1146.432834] ============================================= [ 1146.432834] [ 1146.440708] NMI backtrace for cpu 0 [ 1146.444338] CPU: 0 PID: 1044 Comm: khungtaskd Not tainted 4.14.160-syzkaller #0 [ 1146.451783] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1146.461129] Call Trace: [ 1146.463770] dump_stack+0x142/0x197 [ 1146.467415] nmi_cpu_backtrace.cold+0x57/0x94 [ 1146.471905] ? irq_force_complete_move.cold+0x7d/0x7d [ 1146.477088] nmi_trigger_cpumask_backtrace+0x141/0x189 [ 1146.482359] arch_trigger_cpumask_backtrace+0x14/0x20 [ 1146.487579] watchdog+0x5e7/0xb90 [ 1146.491091] kthread+0x319/0x430 [ 1146.494456] ? hungtask_pm_notify+0x50/0x50 [ 1146.498771] ? kthread_create_on_node+0xd0/0xd0 [ 1146.503444] ret_from_fork+0x24/0x30 [ 1146.507247] Sending NMI from CPU 0 to CPUs 1: [ 1146.512141] NMI backtrace for cpu 1 [ 1146.512145] CPU: 1 PID: 8045 Comm: syz-executor351 Not tainted 4.14.160-syzkaller #0 [ 1146.512149] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1146.512151] task: ffff888095932640 task.stack: ffff888096840000 [ 1146.512154] RIP: 0010:__lock_acquire+0x32a/0x4620 [ 1146.512156] RSP: 0018:ffff888096847640 EFLAGS: 00000002 [ 1146.512161] RAX: ffff888095932f08 RBX: 0000000000000000 RCX: 0000000000000000 [ 1146.512164] RDX: ffff888095932f08 RSI: 1ffff11012b265dc RDI: ffff888095932ee0 [ 1146.512167] RBP: ffff8880968477e8 R08: 0000000000000001 R09: 0000000000000000 [ 1146.512170] R10: ffff888095932ee8 R11: ffff888095932640 R12: ffffc90005e34060 [ 1146.512173] R13: 000000000000053b R14: 0000000000000001 R15: 000000000000053b [ 1146.512176] FS: 0000000001a32880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 1146.512178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1146.512182] CR2: 0000000020000500 CR3: 00000000924ae000 CR4: 00000000001406e0 [ 1146.512184] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1146.512187] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1146.512189] Call Trace: [ 1146.512191] ? mark_held_locks+0xb1/0x100 [ 1146.512193] ? retint_kernel+0x2d/0x2d [ 1146.512195] ? trace_hardirqs_on+0x10/0x10 [ 1146.512197] ? save_trace+0x290/0x290 [ 1146.512200] ? htable_selective_cleanup+0x204/0x300 [ 1146.512202] ? save_trace+0x290/0x290 [ 1146.512204] ? find_held_lock+0x35/0x130 [ 1146.512206] lock_acquire+0x16f/0x430 [ 1146.512208] ? htable_selective_cleanup+0x9c/0x300 [ 1146.512210] ? esp_mt+0x3c0/0x3c0 [ 1146.512212] _raw_spin_lock_bh+0x33/0x50 [ 1146.512214] ? htable_selective_cleanup+0x9c/0x300 [ 1146.512216] htable_selective_cleanup+0x9c/0x300 [ 1146.512218] htable_put+0x164/0x210 [ 1146.512221] ? hashlimit_mt_destroy+0x70/0x70 [ 1146.512223] hashlimit_mt_destroy_v2+0x56/0x70 [ 1146.512225] cleanup_match+0xc2/0x140 [ 1146.512227] ? icmp_checkentry+0x90/0x90 [ 1146.512229] ? xt_request_find_target+0x4b/0xe0 [ 1146.512231] find_check_entry.isra.0+0x3fe/0x920 [ 1146.512233] ? ipt_do_table+0x1770/0x1770 [ 1146.512235] ? kfree+0x183/0x270 [ 1146.512237] ? kvfree+0x4d/0x60 [ 1146.512239] translate_table+0xb3f/0x15a0 [ 1146.512241] ? __do_replace+0x5b0/0x5b0 [ 1146.512243] ? _copy_from_user+0x99/0x110 [ 1146.512245] do_ipt_set_ctl+0x268/0x3ee [ 1146.512247] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1146.512249] ? mutex_unlock+0xd/0x10 [ 1146.512251] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1146.512253] nf_setsockopt+0x67/0xc0 [ 1146.512255] ip_setsockopt+0x9b/0xb0 [ 1146.512257] udp_setsockopt+0x4e/0x90 [ 1146.512259] sock_common_setsockopt+0x94/0xd0 [ 1146.512261] SyS_setsockopt+0x13c/0x210 [ 1146.512263] ? SyS_recv+0x40/0x40 [ 1146.512265] ? do_syscall_64+0x53/0x640 [ 1146.512267] ? SyS_recv+0x40/0x40 [ 1146.512269] do_syscall_64+0x1e8/0x640 [ 1146.512271] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1146.512273] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1146.512275] RIP: 0033:0x4412b9 [ 1146.512277] RSP: 002b:00007ffd14f846a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1146.512283] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 1146.512285] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1146.512288] RBP: 00000000000db1d0 R08: 0000000000000001 R09: 00000000004002c8 [ 1146.512291] R10: 0000000020000500 R11: 0000000000000246 R12: 0000000000402030 [ 1146.512294] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 1146.512295] Code: 48 83 7d 10 00 0f 85 90 06 00 00 4c 03 94 24 90 00 00 00 45 89 ef 66 41 81 e7 ff 1f 49 8d 42 20 48 89 c2 48 89 84 24 80 00 00 00 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 84 d2 74 [ 1146.513089] Kernel panic - not syncing: hung_task: blocked tasks [ 1146.865829] CPU: 0 PID: 1044 Comm: khungtaskd Not tainted 4.14.160-syzkaller #0 [ 1146.873265] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1146.882608] Call Trace: [ 1146.885191] dump_stack+0x142/0x197 [ 1146.888882] panic+0x1f9/0x42d [ 1146.892070] ? add_taint.cold+0x16/0x16 [ 1146.896035] ? ___preempt_schedule+0x16/0x18 [ 1146.900445] watchdog+0x5f8/0xb90 [ 1146.903896] kthread+0x319/0x430 [ 1146.907251] ? hungtask_pm_notify+0x50/0x50 [ 1146.911562] ? kthread_create_on_node+0xd0/0xd0 [ 1146.916225] ret_from_fork+0x24/0x30 [ 1146.921422] Kernel Offset: disabled [ 1146.925051] Rebooting in 86400 seconds..