Warning: Permanently added '10.128.0.94' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 57.989803][ T7031] ================================================================== [ 57.998485][ T7031] BUG: KASAN: null-ptr-deref in choke_reset+0x208/0x340 [ 58.006818][ T7031] Write of size 8 at addr 0000000000000000 by task syz-executor106/7031 [ 58.015518][ T7031] [ 58.019160][ T7031] CPU: 1 PID: 7031 Comm: syz-executor106 Not tainted 5.7.0-rc2-syzkaller #0 [ 58.027837][ T7031] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.038332][ T7031] Call Trace: [ 58.041735][ T7031] dump_stack+0x188/0x20d [ 58.046078][ T7031] ? choke_reset+0x208/0x340 [ 58.050715][ T7031] __kasan_report.cold+0x5/0x4d [ 58.055563][ T7031] ? choke_reset+0x208/0x340 [ 58.060261][ T7031] ? choke_reset+0x208/0x340 [ 58.064977][ T7031] kasan_report+0x33/0x50 [ 58.069321][ T7031] check_memory_region+0x141/0x190 [ 58.074562][ T7031] memset+0x20/0x40 [ 58.078441][ T7031] choke_reset+0x208/0x340 [ 58.082893][ T7031] ? choke_destroy+0x40/0x40 [ 58.087489][ T7031] qdisc_reset+0x6b/0x520 [ 58.091944][ T7031] dev_deactivate_queue.constprop.0+0x13c/0x240 [ 58.098290][ T7031] dev_deactivate_many+0xe2/0xba0 [ 58.103333][ T7031] ? __is_module_percpu_address+0x257/0x350 [ 58.109319][ T7031] dev_deactivate+0xf8/0x1c0 [ 58.114291][ T7031] ? dev_deactivate_many+0xba0/0xba0 [ 58.119596][ T7031] ? qdisc_lookup_ops+0x100/0x100 [ 58.124636][ T7031] qdisc_graft+0xd25/0x1120 [ 58.129830][ T7031] ? tc_dump_tclass+0x480/0x480 [ 58.134701][ T7031] ? tc_get_qdisc+0xaf0/0xaf0 [ 58.139379][ T7031] ? nla_memcpy+0xa0/0xa0 [ 58.143718][ T7031] ? ns_capable_common+0xe2/0x100 [ 58.148734][ T7031] tc_modify_qdisc+0xbab/0x1a00 [ 58.153695][ T7031] ? qdisc_create+0x1140/0x1140 [ 58.158607][ T7031] ? mutex_trylock+0x2c0/0x2c0 [ 58.163386][ T7031] ? find_held_lock+0x2d/0x110 [ 58.168444][ T7031] ? qdisc_create+0x1140/0x1140 [ 58.173305][ T7031] rtnetlink_rcv_msg+0x44e/0xad0 [ 58.178234][ T7031] ? rtnl_bridge_getlink+0x870/0x870 [ 58.183526][ T7031] ? lock_acquire+0x1f2/0x8f0 [ 58.188206][ T7031] ? netlink_deliver_tap+0x146/0xb50 [ 58.193482][ T7031] netlink_rcv_skb+0x15a/0x410 [ 58.198246][ T7031] ? rtnl_bridge_getlink+0x870/0x870 [ 58.203528][ T7031] ? netlink_ack+0xa10/0xa10 [ 58.208151][ T7031] netlink_unicast+0x537/0x740 [ 58.212925][ T7031] ? netlink_attachskb+0x810/0x810 [ 58.218067][ T7031] ? _copy_from_iter_full+0x25c/0x870 [ 58.223442][ T7031] ? __phys_addr_symbol+0x2c/0x70 [ 58.228454][ T7031] ? __check_object_size+0x171/0x437 [ 58.233752][ T7031] netlink_sendmsg+0x882/0xe10 [ 58.238525][ T7031] ? aa_af_perm+0x260/0x260 [ 58.243015][ T7031] ? netlink_unicast+0x740/0x740 [ 58.247960][ T7031] ? netlink_unicast+0x740/0x740 [ 58.252893][ T7031] sock_sendmsg+0xcf/0x120 [ 58.257315][ T7031] ____sys_sendmsg+0x6bf/0x7e0 [ 58.262072][ T7031] ? get_compat_msghdr+0xd1/0x120 [ 58.267084][ T7031] ? kernel_sendmsg+0x50/0x50 [ 58.271768][ T7031] ___sys_sendmsg+0x100/0x170 [ 58.277392][ T7031] ? sendmsg_copy_msghdr+0x70/0x70 [ 58.282504][ T7031] ? mark_held_locks+0xe0/0xe0 [ 58.287263][ T7031] ? __this_cpu_preempt_check+0x28/0x190 [ 58.293068][ T7031] ? percpu_counter_add_batch+0x123/0x180 [ 58.298802][ T7031] ? find_held_lock+0x2d/0x110 [ 58.303576][ T7031] ? __fd_install+0x1b4/0x600 [ 58.308242][ T7031] ? lock_downgrade+0x840/0x840 [ 58.313164][ T7031] ? __fget_light+0x1ab/0x270 [ 58.317830][ T7031] __sys_sendmsg+0xec/0x1b0 [ 58.322335][ T7031] ? __sys_sendmsg_sock+0xb0/0xb0 [ 58.327354][ T7031] ? trace_hardirqs_off_caller+0x55/0x230 [ 58.333079][ T7031] ? do_fast_syscall_32+0xcc/0xe90 [ 58.338207][ T7031] do_fast_syscall_32+0x270/0xe90 [ 58.343238][ T7031] entry_SYSENTER_compat+0x70/0x7f [ 58.348357][ T7031] ================================================================== [ 58.356632][ T7031] Disabling lock debugging due to kernel taint [ 58.363494][ T7031] Kernel panic - not syncing: panic_on_warn set ... [ 58.370216][ T7031] CPU: 1 PID: 7031 Comm: syz-executor106 Tainted: G B 5.7.0-rc2-syzkaller #0 [ 58.380290][ T7031] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.390694][ T7031] Call Trace: [ 58.393977][ T7031] dump_stack+0x188/0x20d [ 58.398750][ T7031] panic+0x2e3/0x75c [ 58.402657][ T7031] ? add_taint.cold+0x16/0x16 [ 58.407526][ T7031] ? retint_kernel+0x2b/0x2b [ 58.414906][ T7031] ? choke_reset+0x208/0x340 [ 58.419756][ T7031] ? trace_hardirqs_on+0x55/0x220 [ 58.424775][ T7031] ? choke_reset+0x208/0x340 [ 58.429356][ T7031] end_report+0x4d/0x53 [ 58.433529][ T7031] __kasan_report.cold+0xd/0x4d [ 58.438382][ T7031] ? choke_reset+0x208/0x340 [ 58.442956][ T7031] ? choke_reset+0x208/0x340 [ 58.447577][ T7031] kasan_report+0x33/0x50 [ 58.451892][ T7031] check_memory_region+0x141/0x190 [ 58.456999][ T7031] memset+0x20/0x40 [ 58.460791][ T7031] choke_reset+0x208/0x340 [ 58.465188][ T7031] ? choke_destroy+0x40/0x40 [ 58.469947][ T7031] qdisc_reset+0x6b/0x520 [ 58.474389][ T7031] dev_deactivate_queue.constprop.0+0x13c/0x240 [ 58.480634][ T7031] dev_deactivate_many+0xe2/0xba0 [ 58.485649][ T7031] ? __is_module_percpu_address+0x257/0x350 [ 58.491541][ T7031] dev_deactivate+0xf8/0x1c0 [ 58.496231][ T7031] ? dev_deactivate_many+0xba0/0xba0 [ 58.501600][ T7031] ? qdisc_lookup_ops+0x100/0x100 [ 58.506894][ T7031] qdisc_graft+0xd25/0x1120 [ 58.511419][ T7031] ? tc_dump_tclass+0x480/0x480 [ 58.516252][ T7031] ? tc_get_qdisc+0xaf0/0xaf0 [ 58.520916][ T7031] ? nla_memcpy+0xa0/0xa0 [ 58.525246][ T7031] ? ns_capable_common+0xe2/0x100 [ 58.530262][ T7031] tc_modify_qdisc+0xbab/0x1a00 [ 58.535120][ T7031] ? qdisc_create+0x1140/0x1140 [ 58.539973][ T7031] ? mutex_trylock+0x2c0/0x2c0 [ 58.544901][ T7031] ? find_held_lock+0x2d/0x110 [ 58.550077][ T7031] ? qdisc_create+0x1140/0x1140 [ 58.554947][ T7031] rtnetlink_rcv_msg+0x44e/0xad0 [ 58.559905][ T7031] ? rtnl_bridge_getlink+0x870/0x870 [ 58.565181][ T7031] ? lock_acquire+0x1f2/0x8f0 [ 58.569857][ T7031] ? netlink_deliver_tap+0x146/0xb50 [ 58.575141][ T7031] netlink_rcv_skb+0x15a/0x410 [ 58.579913][ T7031] ? rtnl_bridge_getlink+0x870/0x870 [ 58.585178][ T7031] ? netlink_ack+0xa10/0xa10 [ 58.589759][ T7031] netlink_unicast+0x537/0x740 [ 58.594689][ T7031] ? netlink_attachskb+0x810/0x810 [ 58.599781][ T7031] ? _copy_from_iter_full+0x25c/0x870 [ 58.605131][ T7031] ? __phys_addr_symbol+0x2c/0x70 [ 58.610138][ T7031] ? __check_object_size+0x171/0x437 [ 58.615404][ T7031] netlink_sendmsg+0x882/0xe10 [ 58.620154][ T7031] ? aa_af_perm+0x260/0x260 [ 58.624649][ T7031] ? netlink_unicast+0x740/0x740 [ 58.629568][ T7031] ? netlink_unicast+0x740/0x740 [ 58.634486][ T7031] sock_sendmsg+0xcf/0x120 [ 58.639508][ T7031] ____sys_sendmsg+0x6bf/0x7e0 [ 58.644265][ T7031] ? get_compat_msghdr+0xd1/0x120 [ 58.649273][ T7031] ? kernel_sendmsg+0x50/0x50 [ 58.653937][ T7031] ___sys_sendmsg+0x100/0x170 [ 58.658593][ T7031] ? sendmsg_copy_msghdr+0x70/0x70 [ 58.663704][ T7031] ? mark_held_locks+0xe0/0xe0 [ 58.668449][ T7031] ? __this_cpu_preempt_check+0x28/0x190 [ 58.674067][ T7031] ? percpu_counter_add_batch+0x123/0x180 [ 58.679837][ T7031] ? find_held_lock+0x2d/0x110 [ 58.684620][ T7031] ? __fd_install+0x1b4/0x600 [ 58.689292][ T7031] ? lock_downgrade+0x840/0x840 [ 58.694189][ T7031] ? __fget_light+0x1ab/0x270 [ 58.699246][ T7031] __sys_sendmsg+0xec/0x1b0 [ 58.703740][ T7031] ? __sys_sendmsg_sock+0xb0/0xb0 [ 58.708927][ T7031] ? trace_hardirqs_off_caller+0x55/0x230 [ 58.714643][ T7031] ? do_fast_syscall_32+0xcc/0xe90 [ 58.719779][ T7031] do_fast_syscall_32+0x270/0xe90 [ 58.724916][ T7031] entry_SYSENTER_compat+0x70/0x7f [ 58.730754][ T7031] Kernel Offset: disabled [ 58.735119][ T7031] Rebooting in 86400 seconds..