[ 81.985716][T12198] rsyslog (12198) used greatest stack depth: 53128 bytes left [ 81.997405][ T30] audit: type=1800 audit(1569295402.043:25): pid=12193 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.032591][ T30] audit: type=1800 audit(1569295402.063:26): pid=12193 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.052802][ T30] audit: type=1800 audit(1569295402.073:27): pid=12193 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.214' (ECDSA) to the list of known hosts. 2019/09/24 03:23:35 fuzzer started 2019/09/24 03:23:39 dialing manager at 10.128.0.26:34199 2019/09/24 03:23:39 syscalls: 2382 2019/09/24 03:23:39 code coverage: enabled 2019/09/24 03:23:39 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/09/24 03:23:39 extra coverage: enabled 2019/09/24 03:23:39 setuid sandbox: enabled 2019/09/24 03:23:39 namespace sandbox: enabled 2019/09/24 03:23:39 Android sandbox: /sys/fs/selinux/policy does not exist 2019/09/24 03:23:39 fault injection: enabled 2019/09/24 03:23:39 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/09/24 03:23:39 net packet injection: enabled 2019/09/24 03:23:39 net device setup: enabled syzkaller login: [ 200.025879][ C1] ================================================================== [ 200.034035][ C1] BUG: KMSAN: uninit-value in kmem_cache_free+0x3df/0x2b70 [ 200.041246][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0-rc7+ #0 [ 200.048637][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 200.058885][ C1] Call Trace: [ 200.062220][ C1] dump_stack+0x191/0x1f0 [ 200.066575][ C1] kmsan_report+0x162/0x2d0 [ 200.071285][ C1] __msan_warning+0x75/0xe0 [ 200.075855][ C1] kmem_cache_free+0x3df/0x2b70 [ 200.080727][ C1] ? kmsan_set_origin+0x6a/0xf0 [ 200.085596][ C1] ? kfree_skb+0x473/0x4c0 [ 200.090042][ C1] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 200.096154][ C1] kfree_skb+0x473/0x4c0 [ 200.100411][ C1] ? packet_rcv_spkt+0x719/0x840 [ 200.105367][ C1] packet_rcv_spkt+0x719/0x840 [ 200.110164][ C1] ? packet_rcv+0x2190/0x2190 [ 200.114860][ C1] __netif_receive_skb_core+0x3aed/0x51a0 [ 200.120600][ C1] ? most_remove_link+0x83/0x7a0 [ 200.125580][ C1] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 200.131499][ C1] ? netif_receive_skb_internal+0x383/0xc20 [ 200.137421][ C1] netif_receive_skb_internal+0x3cc/0xc20 [ 200.143195][ C1] napi_gro_receive+0x682/0xb90 [ 200.148077][ C1] receive_buf+0x653b/0x8810 [ 200.152728][ C1] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 200.158740][ C1] virtnet_poll+0x666/0x19d0 [ 200.163380][ C1] ? refill_work+0x460/0x460 [ 200.167992][ C1] net_rx_action+0x74b/0x1950 [ 200.172715][ C1] ? net_tx_action+0xba0/0xba0 [ 200.177496][ C1] __do_softirq+0x4a1/0x83a [ 200.182035][ C1] ? ksoftirqd_should_run+0x30/0x30 [ 200.187261][ C1] ? takeover_tasklets+0x900/0x900 [ 200.192399][ C1] run_ksoftirqd+0x25/0x40 [ 200.196841][ C1] smpboot_thread_fn+0x4a3/0x990 [ 200.201828][ C1] kthread+0x4b5/0x4f0 [ 200.205938][ C1] ? cpu_report_death+0x190/0x190 [ 200.210991][ C1] ? kthread_blkcg+0xf0/0xf0 [ 200.216634][ C1] ret_from_fork+0x35/0x40 [ 200.221278][ C1] [ 200.223602][ C1] Uninit was stored to memory at: [ 200.228648][ C1] kmsan_internal_chain_origin+0xcc/0x150 [ 200.234388][ C1] __msan_chain_origin+0x6b/0xe0 [ 200.239459][ C1] ___slab_alloc+0x1dbc/0x1fb0 [ 200.244253][ C1] kmem_cache_alloc+0xade/0xd10 [ 200.249084][ C1] skb_clone+0x326/0x5d0 [ 200.253364][ C1] packet_rcv_spkt+0x245/0x840 [ 200.258109][ C1] __netif_receive_skb_core+0x3aed/0x51a0 [ 200.263806][ C1] netif_receive_skb_internal+0x3cc/0xc20 [ 200.269502][ C1] napi_gro_receive+0x682/0xb90 [ 200.274406][ C1] receive_buf+0x653b/0x8810 [ 200.278971][ C1] virtnet_poll+0x666/0x19d0 [ 200.283542][ C1] net_rx_action+0x74b/0x1950 [ 200.288195][ C1] __do_softirq+0x4a1/0x83a [ 200.292856][ C1] run_ksoftirqd+0x25/0x40 [ 200.297251][ C1] smpboot_thread_fn+0x4a3/0x990 [ 200.302165][ C1] kthread+0x4b5/0x4f0 [ 200.306380][ C1] ret_from_fork+0x35/0x40 [ 200.310811][ C1] [ 200.313120][ C1] Uninit was created at: [ 200.317381][ C1] kmsan_internal_poison_shadow+0x58/0xb0 [ 200.324385][ C1] kmsan_slab_free+0x8d/0x100 [ 200.329051][ C1] kmem_cache_free_bulk+0x3ad9/0x3f50 [ 200.334408][ C1] __kfree_skb_flush+0xb0/0x100 [ 200.339244][ C1] net_rx_action+0x1908/0x1950 [ 200.343983][ C1] __do_softirq+0x4a1/0x83a [ 200.348461][ C1] irq_exit+0x230/0x280 [ 200.352596][ C1] do_IRQ+0x20d/0x3a0 [ 200.356559][ C1] ret_from_intr+0x0/0x33 [ 200.360866][ C1] default_idle+0x53/0x90 [ 200.365172][ C1] arch_cpu_idle+0x25/0x30 [ 200.369562][ C1] do_idle+0x1d7/0x790 [ 200.373609][ C1] cpu_startup_entry+0x45/0x50 [ 200.379050][ C1] rest_init+0x1be/0x1f0 [ 200.383279][ C1] arch_call_rest_init+0x13/0x15 [ 200.388195][ C1] start_kernel+0x991/0xb61 [ 200.392686][ C1] x86_64_start_reservations+0x18/0x2e [ 200.398144][ C1] x86_64_start_kernel+0x81/0x84 [ 200.403065][ C1] secondary_startup_64+0xa4/0xb0 [ 200.408063][ C1] ================================================================== [ 200.416097][ C1] Disabling lock debugging due to kernel taint [ 200.422239][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 200.428808][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G B 5.3.0-rc7+ #0 [ 200.437634][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 200.447669][ C1] Call Trace: [ 200.450951][ C1] dump_stack+0x191/0x1f0 [ 200.455288][ C1] panic+0x3c9/0xc1e [ 200.459267][ C1] kmsan_report+0x2ca/0x2d0 [ 200.463766][ C1] __msan_warning+0x75/0xe0 [ 200.468254][ C1] kmem_cache_free+0x3df/0x2b70 [ 200.473109][ C1] ? kmsan_set_origin+0x6a/0xf0 [ 200.477971][ C1] ? kfree_skb+0x473/0x4c0 [ 200.482392][ C1] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 200.488466][ C1] kfree_skb+0x473/0x4c0 [ 200.492691][ C1] ? packet_rcv_spkt+0x719/0x840 [ 200.497611][ C1] packet_rcv_spkt+0x719/0x840 [ 200.502445][ C1] ? packet_rcv+0x2190/0x2190 [ 200.507136][ C1] __netif_receive_skb_core+0x3aed/0x51a0 [ 200.512843][ C1] ? most_remove_link+0x83/0x7a0 [ 200.517895][ C1] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 200.523767][ C1] ? netif_receive_skb_internal+0x383/0xc20 [ 200.529650][ C1] netif_receive_skb_internal+0x3cc/0xc20 [ 200.535360][ C1] napi_gro_receive+0x682/0xb90 [ 200.540210][ C1] receive_buf+0x653b/0x8810 [ 200.544809][ C1] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 200.550684][ C1] virtnet_poll+0x666/0x19d0 [ 200.555270][ C1] ? refill_work+0x460/0x460 [ 200.560073][ C1] net_rx_action+0x74b/0x1950 [ 200.564749][ C1] ? net_tx_action+0xba0/0xba0 [ 200.569520][ C1] __do_softirq+0x4a1/0x83a [ 200.574025][ C1] ? ksoftirqd_should_run+0x30/0x30 [ 200.579308][ C1] ? takeover_tasklets+0x900/0x900 [ 200.584504][ C1] run_ksoftirqd+0x25/0x40 [ 200.588925][ C1] smpboot_thread_fn+0x4a3/0x990 [ 200.593867][ C1] kthread+0x4b5/0x4f0 [ 200.597941][ C1] ? cpu_report_death+0x190/0x190 [ 200.602962][ C1] ? kthread_blkcg+0xf0/0xf0 [ 200.607551][ C1] ret_from_fork+0x35/0x40 [ 200.614710][ C1] Kernel Offset: disabled [ 200.619061][ C1] Rebooting in 86400 seconds..