Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. syzkaller login: [ 218.304373][ T35] audit: type=1400 audit(1613022601.548:8): avc: denied { execmem } for pid=8447 comm="syz-executor228" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 218.362584][ T8455] IPVS: ftp: loaded support on port[0] = 21 [ 218.372156][ T8454] IPVS: ftp: loaded support on port[0] = 21 [ 218.373069][ T8459] IPVS: ftp: loaded support on port[0] = 21 [ 218.381434][ T8456] IPVS: ftp: loaded support on port[0] = 21 [ 218.386838][ T8458] IPVS: ftp: loaded support on port[0] = 21 [ 218.392630][ T8457] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program [ 220.098615][ T204] ================================================================== [ 220.106975][ T204] BUG: KASAN: null-ptr-deref in tcf_idrinfo_destroy+0x129/0x1d0 [ 220.114726][ T204] Read of size 4 at addr 0000000000000010 by task kworker/u4:5/204 [ 220.123491][ T204] [ 220.126637][ T204] CPU: 0 PID: 204 Comm: kworker/u4:5 Not tainted 5.11.0-rc7-syzkaller #0 [ 220.135048][ T204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 220.145116][ T204] Workqueue: netns cleanup_net [ 220.150078][ T204] Call Trace: [ 220.153462][ T204] dump_stack+0x107/0x163 [ 220.157803][ T204] ? tcf_idrinfo_destroy+0x129/0x1d0 [ 220.163107][ T204] ? tcf_idrinfo_destroy+0x129/0x1d0 [ 220.168429][ T204] kasan_report.cold+0x5f/0xd5 [ 220.173214][ T204] ? static_obj+0x30/0xc0 [ 220.177565][ T204] ? tcf_idrinfo_destroy+0x129/0x1d0 [ 220.182894][ T204] check_memory_region+0x13d/0x180 [ 220.188011][ T204] tcf_idrinfo_destroy+0x129/0x1d0 [ 220.193135][ T204] ? find_dump_kind+0x220/0x220 [ 220.198077][ T204] police_exit_net+0x168/0x360 [ 220.202854][ T204] ? tcf_police_dump+0xbd0/0xbd0 [ 220.207812][ T204] ops_exit_list+0x10d/0x160 [ 220.212403][ T204] cleanup_net+0x4ea/0xb10 [ 220.216821][ T204] ? ops_free_list.part.0+0x3d0/0x3d0 [ 220.222197][ T204] process_one_work+0x98d/0x15f0 [ 220.227164][ T204] ? pwq_dec_nr_in_flight+0x320/0x320 [ 220.232549][ T204] ? rwlock_bug.part.0+0x90/0x90 [ 220.237497][ T204] ? _raw_spin_lock_irq+0x41/0x50 [ 220.242558][ T204] worker_thread+0x64c/0x1120 [ 220.247276][ T204] ? process_one_work+0x15f0/0x15f0 [ 220.252532][ T204] kthread+0x3b1/0x4a0 [ 220.256642][ T204] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 220.262544][ T204] ret_from_fork+0x1f/0x30 [ 220.266997][ T204] ================================================================== [ 220.275076][ T204] Disabling lock debugging due to kernel taint [ 220.282267][ T204] Kernel panic - not syncing: panic_on_warn set ... [ 220.288964][ T204] CPU: 0 PID: 204 Comm: kworker/u4:5 Tainted: G B 5.11.0-rc7-syzkaller #0 [ 220.298793][ T204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 220.308932][ T204] Workqueue: netns cleanup_net [ 220.313721][ T204] Call Trace: [ 220.317002][ T204] dump_stack+0x107/0x163 [ 220.321423][ T204] ? tcf_idrinfo_destroy+0x100/0x1d0 [ 220.326825][ T204] panic+0x306/0x73d [ 220.330804][ T204] ? __warn_printk+0xf3/0xf3 [ 220.335566][ T204] ? preempt_schedule_common+0x59/0xc0 [ 220.341019][ T204] ? tcf_idrinfo_destroy+0x129/0x1d0 [ 220.346516][ T204] ? preempt_schedule_thunk+0x16/0x18 [ 220.352118][ T204] ? trace_hardirqs_on+0x38/0x1c0 [ 220.357146][ T204] ? trace_hardirqs_on+0x51/0x1c0 [ 220.362174][ T204] ? tcf_idrinfo_destroy+0x129/0x1d0 [ 220.367547][ T204] ? tcf_idrinfo_destroy+0x129/0x1d0 [ 220.372870][ T204] end_report+0x58/0x5e [ 220.377038][ T204] kasan_report.cold+0x67/0xd5 [ 220.381805][ T204] ? static_obj+0x30/0xc0 [ 220.386161][ T204] ? tcf_idrinfo_destroy+0x129/0x1d0 [ 220.391557][ T204] check_memory_region+0x13d/0x180 [ 220.396772][ T204] tcf_idrinfo_destroy+0x129/0x1d0 [ 220.401882][ T204] ? find_dump_kind+0x220/0x220 [ 220.406760][ T204] police_exit_net+0x168/0x360 [ 220.411542][ T204] ? tcf_police_dump+0xbd0/0xbd0 [ 220.416490][ T204] ops_exit_list+0x10d/0x160 [ 220.421192][ T204] cleanup_net+0x4ea/0xb10 [ 220.425621][ T204] ? ops_free_list.part.0+0x3d0/0x3d0 [ 220.430994][ T204] process_one_work+0x98d/0x15f0 [ 220.436425][ T204] ? pwq_dec_nr_in_flight+0x320/0x320 [ 220.442239][ T204] ? rwlock_bug.part.0+0x90/0x90 [ 220.447183][ T204] ? _raw_spin_lock_irq+0x41/0x50 [ 220.452302][ T204] worker_thread+0x64c/0x1120 [ 220.457173][ T204] ? process_one_work+0x15f0/0x15f0 [ 220.462440][ T204] kthread+0x3b1/0x4a0 [ 220.466528][ T204] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 220.472417][ T204] ret_from_fork+0x1f/0x30 [ 220.477463][ T204] Kernel Offset: disabled [ 220.481901][ T204] Rebooting in 86400 seconds..