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) executing program executing program executing program executing program executing program executing program [ 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1144.790243] 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: [] debug_show_all_locks+0x7f/0x21f [ 1146.251668] 2 locks held by getty/7297: [ 1146.255919] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.264671] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.274230] 2 locks held by getty/7298: [ 1146.278201] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.286960] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.296487] 2 locks held by getty/7299: [ 1146.300482] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.309319] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.318711] 2 locks held by getty/7300: [ 1146.322721] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.331482] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.340935] 2 locks held by getty/7301: [ 1146.344903] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.353794] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.363156] 2 locks held by getty/7302: [ 1146.367144] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.375917] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.385606] 2 locks held by getty/7303: [ 1146.389609] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1146.399077] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1146.408445] 1 lock held by syz-executor879/7614: [ 1146.413265] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.424463] 1 lock held by syz-executor879/7615: [ 1146.429228] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.439746] 1 lock held by syz-executor879/7616: [ 1146.444552] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.455172] 1 lock held by syz-executor879/7617: [ 1146.460011] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1146.470581] 1 lock held by syz-executor879/7618: [ 1146.475392] #0: (hashlimit_mutex){+.+.}, at: [] 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..