Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 35.770650] audit: type=1400 audit(1587363799.488:8): avc: denied { execmem } for pid=6325 comm="syz-executor101" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 35.829672] ================================================================== [ 35.837139] BUG: KASAN: null-ptr-deref in choke_reset+0x1fc/0x330 [ 35.843356] Write of size 8 at addr (null) by task syz-executor101/6327 [ 35.850957] [ 35.852573] CPU: 1 PID: 6327 Comm: syz-executor101 Not tainted 4.14.176-syzkaller #0 [ 35.860440] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.869781] Call Trace: [ 35.872372] dump_stack+0x13e/0x194 [ 35.876130] ? choke_reset+0x1fc/0x330 [ 35.880059] kasan_report.cold+0x127/0x2ae [ 35.884292] memset+0x20/0x40 [ 35.887501] choke_reset+0x1fc/0x330 [ 35.891210] ? lock_acquire+0x170/0x3f0 [ 35.895208] ? choke_destroy+0x40/0x40 [ 35.899083] qdisc_reset+0x61/0x1e0 [ 35.902700] dev_deactivate_queue.constprop.0+0xc5/0x150 [ 35.908143] dev_deactivate_many+0xd6/0x960 [ 35.912480] dev_deactivate+0xe2/0x190 [ 35.916358] ? dev_deactivate_many+0x960/0x960 [ 35.921070] qdisc_graft+0x989/0xcd0 [ 35.924773] ? tc_dump_tclass+0x400/0x400 [ 35.928942] ? nla_parse+0x183/0x240 [ 35.932658] tc_modify_qdisc+0x99e/0x1181 [ 35.936795] ? qdisc_create+0xe30/0xe30 [ 35.940754] ? save_trace+0x290/0x290 [ 35.944537] ? rtnetlink_rcv_msg+0x2e8/0xb10 [ 35.948935] ? qdisc_create+0xe30/0xe30 [ 35.952909] rtnetlink_rcv_msg+0x3be/0xb10 [ 35.957183] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 35.961766] ? save_trace+0x290/0x290 [ 35.965554] ? save_trace+0x290/0x290 [ 35.969344] netlink_rcv_skb+0x127/0x370 [ 35.973394] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 35.977962] ? netlink_ack+0x980/0x980 [ 35.981838] netlink_unicast+0x437/0x620 [ 35.985921] ? netlink_attachskb+0x600/0x600 [ 35.990321] netlink_sendmsg+0x733/0xbe0 [ 35.994904] ? netlink_unicast+0x620/0x620 [ 35.999123] ? SYSC_sendto+0x2b0/0x2b0 [ 36.003002] ? security_socket_sendmsg+0x83/0xb0 [ 36.007747] ? netlink_unicast+0x620/0x620 [ 36.011987] sock_sendmsg+0xc5/0x100 [ 36.015720] ___sys_sendmsg+0x70a/0x840 [ 36.019694] ? copy_msghdr_from_user+0x380/0x380 [ 36.024452] ? trace_hardirqs_on+0x10/0x10 [ 36.028705] ? save_trace+0x290/0x290 [ 36.032516] ? selinux_file_alloc_security+0xaf/0x190 [ 36.037702] ? find_held_lock+0x2d/0x110 [ 36.041798] ? __fd_install+0x1ec/0x5c0 [ 36.045780] ? __lock_is_held+0xad/0x140 [ 36.049841] ? lock_downgrade+0x6e0/0x6e0 [ 36.053988] ? __fget_light+0x16a/0x1f0 [ 36.057965] ? sockfd_lookup_light+0xb2/0x160 [ 36.062495] __sys_sendmsg+0xa3/0x120 [ 36.066367] ? SyS_shutdown+0x160/0x160 [ 36.070350] ? move_addr_to_kernel+0x60/0x60 [ 36.074759] SyS_sendmsg+0x27/0x40 [ 36.078292] ? __sys_sendmsg+0x120/0x120 [ 36.082356] do_syscall_64+0x1d5/0x640 [ 36.086248] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 36.091463] RIP: 0033:0x4415c9 [ 36.094640] RSP: 002b:00007fffb465ff18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 36.102351] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004415c9 [ 36.109627] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 36.116980] RBP: 0000000000008bd2 R08: 00000000004002c8 R09: 00000000004002c8 [ 36.124251] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004023f0 [ 36.131516] R13: 0000000000402480 R14: 0000000000000000 R15: 0000000000000000 [ 36.138827] ================================================================== [ 36.146222] Disabling lock debugging due to kernel taint [ 36.151779] Kernel panic - not syncing: panic_on_warn set ... [ 36.151779] [ 36.159164] CPU: 1 PID: 6327 Comm: syz-executor101 Tainted: G B 4.14.176-syzkaller #0 [ 36.168294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.177658] Call Trace: [ 36.180263] dump_stack+0x13e/0x194 [ 36.184024] panic+0x1f9/0x42d [ 36.187226] ? add_taint.cold+0x16/0x16 [ 36.191379] ? choke_reset+0x1fc/0x330 [ 36.195266] kasan_end_report+0x43/0x49 [ 36.199237] kasan_report.cold+0x12f/0x2ae [ 36.203470] memset+0x20/0x40 [ 36.207924] choke_reset+0x1fc/0x330 [ 36.211764] ? lock_acquire+0x170/0x3f0 [ 36.215886] ? choke_destroy+0x40/0x40 [ 36.219825] qdisc_reset+0x61/0x1e0 [ 36.223475] dev_deactivate_queue.constprop.0+0xc5/0x150 [ 36.228928] dev_deactivate_many+0xd6/0x960 [ 36.233262] dev_deactivate+0xe2/0x190 [ 36.237195] ? dev_deactivate_many+0x960/0x960 [ 36.242021] qdisc_graft+0x989/0xcd0 [ 36.245928] ? tc_dump_tclass+0x400/0x400 [ 36.250177] ? nla_parse+0x183/0x240 [ 36.253982] tc_modify_qdisc+0x99e/0x1181 [ 36.258644] ? qdisc_create+0xe30/0xe30 [ 36.262758] ? save_trace+0x290/0x290 [ 36.266678] ? rtnetlink_rcv_msg+0x2e8/0xb10 [ 36.271417] ? qdisc_create+0xe30/0xe30 [ 36.275709] rtnetlink_rcv_msg+0x3be/0xb10 [ 36.280266] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 36.285099] ? save_trace+0x290/0x290 [ 36.289070] ? save_trace+0x290/0x290 [ 36.293104] netlink_rcv_skb+0x127/0x370 [ 36.297423] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 36.302063] ? netlink_ack+0x980/0x980 [ 36.306005] netlink_unicast+0x437/0x620 [ 36.310149] ? netlink_attachskb+0x600/0x600 [ 36.314708] netlink_sendmsg+0x733/0xbe0 [ 36.318853] ? netlink_unicast+0x620/0x620 [ 36.323351] ? SYSC_sendto+0x2b0/0x2b0 [ 36.327764] ? security_socket_sendmsg+0x83/0xb0 [ 36.332953] ? netlink_unicast+0x620/0x620 [ 36.337269] sock_sendmsg+0xc5/0x100 [ 36.341041] ___sys_sendmsg+0x70a/0x840 [ 36.345195] ? copy_msghdr_from_user+0x380/0x380 [ 36.350159] ? trace_hardirqs_on+0x10/0x10 [ 36.355027] ? save_trace+0x290/0x290 [ 36.359161] ? selinux_file_alloc_security+0xaf/0x190 [ 36.364431] ? find_held_lock+0x2d/0x110 [ 36.368558] ? __fd_install+0x1ec/0x5c0 [ 36.372559] ? __lock_is_held+0xad/0x140 [ 36.376646] ? lock_downgrade+0x6e0/0x6e0 [ 36.380827] ? __fget_light+0x16a/0x1f0 [ 36.384820] ? sockfd_lookup_light+0xb2/0x160 [ 36.389398] __sys_sendmsg+0xa3/0x120 [ 36.393269] ? SyS_shutdown+0x160/0x160 [ 36.397347] ? move_addr_to_kernel+0x60/0x60 [ 36.401811] SyS_sendmsg+0x27/0x40 [ 36.405415] ? __sys_sendmsg+0x120/0x120 [ 36.409517] do_syscall_64+0x1d5/0x640 [ 36.413455] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 36.418713] RIP: 0033:0x4415c9 [ 36.422000] RSP: 002b:00007fffb465ff18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 36.430272] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004415c9 [ 36.437585] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 36.444886] RBP: 0000000000008bd2 R08: 00000000004002c8 R09: 00000000004002c8 [ 36.452153] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004023f0 [ 36.459421] R13: 0000000000402480 R14: 0000000000000000 R15: 0000000000000000 [ 36.467707] Kernel Offset: disabled [ 36.471360] Rebooting in 86400 seconds..