[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 108.994525][ T31] audit: type=1800 audit(1565163797.048:25): pid=12438 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 109.018537][ T31] audit: type=1800 audit(1565163797.068:26): pid=12438 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 109.046138][ T31] audit: type=1800 audit(1565163797.098:27): pid=12438 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 '10.128.0.102' (ECDSA) to the list of known hosts. 2019/08/07 07:43:32 fuzzer started 2019/08/07 07:43:38 dialing manager at 10.128.0.26:37019 2019/08/07 07:43:39 syscalls: 2369 2019/08/07 07:43:39 code coverage: enabled 2019/08/07 07:43:39 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/08/07 07:43:39 extra coverage: enabled 2019/08/07 07:43:39 setuid sandbox: enabled 2019/08/07 07:43:39 namespace sandbox: enabled 2019/08/07 07:43:39 Android sandbox: /sys/fs/selinux/policy does not exist 2019/08/07 07:43:39 fault injection: enabled 2019/08/07 07:43:39 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/08/07 07:43:39 net packet injection: enabled 2019/08/07 07:43:39 net device setup: enabled syzkaller login: [ 197.554085][ C1] ================================================================== [ 197.562213][ C1] BUG: KMSAN: uninit-value in kmem_cache_alloc_node+0x5d0/0xe70 [ 197.569844][ C1] CPU: 1 PID: 12600 Comm: syz-fuzzer Not tainted 5.3.0-rc3+ #16 [ 197.577446][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 197.587480][ C1] Call Trace: [ 197.590746][ C1] [ 197.593589][ C1] dump_stack+0x191/0x1f0 [ 197.597911][ C1] kmsan_report+0x162/0x2d0 [ 197.602409][ C1] __msan_warning+0x75/0xe0 [ 197.606903][ C1] kmem_cache_alloc_node+0x5d0/0xe70 [ 197.612184][ C1] ? __alloc_skb+0x215/0xa10 [ 197.616780][ C1] __alloc_skb+0x215/0xa10 [ 197.621199][ C1] aoecmd_cfg+0x205/0xa80 [ 197.625549][ C1] discover_timer+0x86/0xa0 [ 197.630042][ C1] call_timer_fn+0x232/0x530 [ 197.634618][ C1] ? skbfree+0x4a0/0x4a0 [ 197.638851][ C1] __run_timers+0xcdc/0x11a0 [ 197.643430][ C1] ? skbfree+0x4a0/0x4a0 [ 197.647691][ C1] ? kmsan_get_shadow_origin_ptr+0x194/0x3a0 [ 197.653655][ C1] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.659617][ C1] run_timer_softirq+0x2d/0x50 [ 197.664378][ C1] ? timers_dead_cpu+0x9d0/0x9d0 [ 197.669299][ C1] __do_softirq+0x4a1/0x83a [ 197.673819][ C1] do_softirq_own_stack+0x49/0x80 [ 197.678823][ C1] [ 197.681765][ C1] __local_bh_enable_ip+0x184/0x1d0 [ 197.686960][ C1] local_bh_enable+0x36/0x40 [ 197.691539][ C1] ip_finish_output2+0x20dc/0x25d0 [ 197.696651][ C1] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 197.702704][ C1] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 197.708691][ C1] __ip_finish_output+0xaf8/0xda0 [ 197.713713][ C1] ip_finish_output+0x2db/0x420 [ 197.718558][ C1] ip_output+0x541/0x610 [ 197.722801][ C1] ? ip_mc_finish_output+0x6d0/0x6d0 [ 197.728092][ C1] ? ip_finish_output+0x420/0x420 [ 197.733102][ C1] __ip_queue_xmit+0x1caf/0x21f0 [ 197.738028][ C1] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.743998][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 197.750067][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 197.756151][ C1] ip_queue_xmit+0xcc/0xf0 [ 197.760555][ C1] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 197.766175][ C1] __tcp_transmit_skb+0x409e/0x5c60 [ 197.771394][ C1] __tcp_send_ack+0x701/0x840 [ 197.776064][ C1] tcp_send_ack+0x68/0x90 [ 197.780382][ C1] tcp_cleanup_rbuf+0x764/0x800 [ 197.785226][ C1] tcp_recvmsg+0x334d/0x4ff0 [ 197.789851][ C1] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.795840][ C1] ? tcp_mmap+0x150/0x150 [ 197.800161][ C1] ? tcp_mmap+0x150/0x150 [ 197.804475][ C1] inet_recvmsg+0x237/0x7d0 [ 197.808992][ C1] ? inet_sendpage+0x2c0/0x2c0 [ 197.813742][ C1] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.819706][ C1] ? inet_sendpage+0x2c0/0x2c0 [ 197.824451][ C1] ? inet_sendpage+0x2c0/0x2c0 [ 197.829200][ C1] sock_read_iter+0x5be/0x660 [ 197.833878][ C1] ? kernel_sock_ip_overhead+0x340/0x340 [ 197.839496][ C1] __vfs_read+0xa67/0xc90 [ 197.843837][ C1] vfs_read+0x359/0x6f0 [ 197.847993][ C1] ksys_read+0x265/0x430 [ 197.852234][ C1] __se_sys_read+0x92/0xb0 [ 197.856642][ C1] __x64_sys_read+0x4a/0x70 [ 197.861128][ C1] do_syscall_64+0xbc/0xf0 [ 197.865537][ C1] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 197.871411][ C1] RIP: 0033:0x47fcb4 [ 197.875289][ C1] Code: ff ff cc cc cc cc e8 2b 41 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 45 31 d2 45 31 c0 45 31 c9 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 197.894875][ C1] RSP: 002b:000000c420295710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 197.903284][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 197.911238][ C1] RDX: 0000000000001000 RSI: 000000c4202b6000 RDI: 0000000000000003 [ 197.919185][ C1] RBP: 000000c420295760 R08: 0000000000000000 R09: 0000000000000000 [ 197.927137][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 [ 197.935092][ C1] R13: 0000000000000008 R14: 0000000000000020 R15: ffffffffffffffff [ 197.943074][ C1] [ 197.945405][ C1] Uninit was stored to memory at: [ 197.950414][ C1] kmsan_internal_chain_origin+0xcc/0x150 [ 197.956115][ C1] __msan_chain_origin+0x6b/0xe0 [ 197.961038][ C1] ___slab_alloc+0x1dbc/0x1fb0 [ 197.965783][ C1] kmem_cache_alloc_node+0x769/0xe70 [ 197.971051][ C1] __alloc_skb+0x215/0xa10 [ 197.975457][ C1] aoecmd_cfg+0x205/0xa80 [ 197.979767][ C1] discover_timer+0x86/0xa0 [ 197.984252][ C1] call_timer_fn+0x232/0x530 [ 197.988821][ C1] __run_timers+0xcdc/0x11a0 [ 197.993389][ C1] run_timer_softirq+0x2d/0x50 [ 197.998135][ C1] __do_softirq+0x4a1/0x83a [ 198.002621][ C1] do_softirq_own_stack+0x49/0x80 [ 198.007632][ C1] __local_bh_enable_ip+0x184/0x1d0 [ 198.012810][ C1] local_bh_enable+0x36/0x40 [ 198.017375][ C1] ip_finish_output2+0x20dc/0x25d0 [ 198.022467][ C1] __ip_finish_output+0xaf8/0xda0 [ 198.027476][ C1] ip_finish_output+0x2db/0x420 [ 198.032306][ C1] ip_output+0x541/0x610 [ 198.036525][ C1] __ip_queue_xmit+0x1caf/0x21f0 [ 198.041439][ C1] ip_queue_xmit+0xcc/0xf0 [ 198.045836][ C1] __tcp_transmit_skb+0x409e/0x5c60 [ 198.051015][ C1] __tcp_send_ack+0x701/0x840 [ 198.055685][ C1] tcp_send_ack+0x68/0x90 [ 198.059990][ C1] tcp_cleanup_rbuf+0x764/0x800 [ 198.064817][ C1] tcp_recvmsg+0x334d/0x4ff0 [ 198.069396][ C1] inet_recvmsg+0x237/0x7d0 [ 198.073881][ C1] sock_read_iter+0x5be/0x660 [ 198.078535][ C1] __vfs_read+0xa67/0xc90 [ 198.082846][ C1] vfs_read+0x359/0x6f0 [ 198.086980][ C1] ksys_read+0x265/0x430 [ 198.091205][ C1] __se_sys_read+0x92/0xb0 [ 198.095603][ C1] __x64_sys_read+0x4a/0x70 [ 198.100106][ C1] do_syscall_64+0xbc/0xf0 [ 198.104508][ C1] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.110372][ C1] [ 198.112675][ C1] Uninit was created at: [ 198.116916][ C1] kmsan_internal_poison_shadow+0x53/0xa0 [ 198.122616][ C1] kmsan_slab_free+0x8d/0x100 [ 198.127274][ C1] kmem_cache_free_bulk+0x3ad9/0x3f50 [ 198.132625][ C1] __kfree_skb_flush+0xb0/0x100 [ 198.137457][ C1] net_rx_action+0x1908/0x1950 [ 198.142203][ C1] __do_softirq+0x4a1/0x83a [ 198.146684][ C1] irq_exit+0x230/0x280 [ 198.150819][ C1] do_IRQ+0x20d/0x3a0 [ 198.154777][ C1] ret_from_intr+0x0/0x33 [ 198.159105][ C1] kmsan_get_shadow_origin_ptr+0x59/0x3a0 [ 198.164803][ C1] __msan_metadata_ptr_for_load_4+0x10/0x20 [ 198.170697][ C1] stack_trace_consume_entry+0x89/0x320 [ 198.176223][ C1] arch_stack_walk+0x30f/0x3e0 [ 198.180964][ C1] stack_trace_save+0x11c/0x1b0 [ 198.185794][ C1] kmsan_internal_chain_origin+0xcc/0x150 [ 198.191494][ C1] kmsan_memcpy_memmove_metadata+0x819/0xa80 [ 198.197450][ C1] kmsan_memcpy_metadata+0xb/0x10 [ 198.202455][ C1] __msan_memcpy+0x56/0x70 [ 198.206848][ C1] sock_read_iter+0x116/0x660 [ 198.211506][ C1] __vfs_read+0xa67/0xc90 [ 198.215832][ C1] vfs_read+0x359/0x6f0 [ 198.219970][ C1] ksys_read+0x265/0x430 [ 198.224281][ C1] __se_sys_read+0x92/0xb0 [ 198.228694][ C1] __x64_sys_read+0x4a/0x70 [ 198.233179][ C1] do_syscall_64+0xbc/0xf0 [ 198.237574][ C1] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.243455][ C1] ================================================================== [ 198.251493][ C1] Disabling lock debugging due to kernel taint [ 198.257620][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 198.264194][ C1] CPU: 1 PID: 12600 Comm: syz-fuzzer Tainted: G B 5.3.0-rc3+ #16 [ 198.273189][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 198.283224][ C1] Call Trace: [ 198.286516][ C1] [ 198.289360][ C1] dump_stack+0x191/0x1f0 [ 198.293687][ C1] panic+0x3c9/0xc1e [ 198.297613][ C1] kmsan_report+0x2ca/0x2d0 [ 198.302117][ C1] __msan_warning+0x75/0xe0 [ 198.306612][ C1] kmem_cache_alloc_node+0x5d0/0xe70 [ 198.311883][ C1] ? __alloc_skb+0x215/0xa10 [ 198.316495][ C1] __alloc_skb+0x215/0xa10 [ 198.320916][ C1] aoecmd_cfg+0x205/0xa80 [ 198.325252][ C1] discover_timer+0x86/0xa0 [ 198.329743][ C1] call_timer_fn+0x232/0x530 [ 198.334317][ C1] ? skbfree+0x4a0/0x4a0 [ 198.338550][ C1] __run_timers+0xcdc/0x11a0 [ 198.343134][ C1] ? skbfree+0x4a0/0x4a0 [ 198.347375][ C1] ? kmsan_get_shadow_origin_ptr+0x194/0x3a0 [ 198.353338][ C1] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.359303][ C1] run_timer_softirq+0x2d/0x50 [ 198.364051][ C1] ? timers_dead_cpu+0x9d0/0x9d0 [ 198.368974][ C1] __do_softirq+0x4a1/0x83a [ 198.373497][ C1] do_softirq_own_stack+0x49/0x80 [ 198.378499][ C1] [ 198.381426][ C1] __local_bh_enable_ip+0x184/0x1d0 [ 198.386616][ C1] local_bh_enable+0x36/0x40 [ 198.391190][ C1] ip_finish_output2+0x20dc/0x25d0 [ 198.396287][ C1] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 198.402362][ C1] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 198.408353][ C1] __ip_finish_output+0xaf8/0xda0 [ 198.413376][ C1] ip_finish_output+0x2db/0x420 [ 198.418225][ C1] ip_output+0x541/0x610 [ 198.422466][ C1] ? ip_mc_finish_output+0x6d0/0x6d0 [ 198.427743][ C1] ? ip_finish_output+0x420/0x420 [ 198.432756][ C1] __ip_queue_xmit+0x1caf/0x21f0 [ 198.437687][ C1] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.443655][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 198.449705][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 198.455775][ C1] ip_queue_xmit+0xcc/0xf0 [ 198.460183][ C1] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 198.465801][ C1] __tcp_transmit_skb+0x409e/0x5c60 [ 198.471022][ C1] __tcp_send_ack+0x701/0x840 [ 198.475692][ C1] tcp_send_ack+0x68/0x90 [ 198.480009][ C1] tcp_cleanup_rbuf+0x764/0x800 [ 198.484858][ C1] tcp_recvmsg+0x334d/0x4ff0 [ 198.489492][ C1] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.495479][ C1] ? tcp_mmap+0x150/0x150 [ 198.499792][ C1] ? tcp_mmap+0x150/0x150 [ 198.504107][ C1] inet_recvmsg+0x237/0x7d0 [ 198.508602][ C1] ? inet_sendpage+0x2c0/0x2c0 [ 198.513353][ C1] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.519316][ C1] ? inet_sendpage+0x2c0/0x2c0 [ 198.524062][ C1] ? inet_sendpage+0x2c0/0x2c0 [ 198.528812][ C1] sock_read_iter+0x5be/0x660 [ 198.533488][ C1] ? kernel_sock_ip_overhead+0x340/0x340 [ 198.539190][ C1] __vfs_read+0xa67/0xc90 [ 198.543533][ C1] vfs_read+0x359/0x6f0 [ 198.547709][ C1] ksys_read+0x265/0x430 [ 198.551953][ C1] __se_sys_read+0x92/0xb0 [ 198.556359][ C1] __x64_sys_read+0x4a/0x70 [ 198.560867][ C1] do_syscall_64+0xbc/0xf0 [ 198.565278][ C1] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.571150][ C1] RIP: 0033:0x47fcb4 [ 198.575373][ C1] Code: ff ff cc cc cc cc e8 2b 41 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 45 31 d2 45 31 c0 45 31 c9 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 198.594975][ C1] RSP: 002b:000000c420295710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 198.603370][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 198.611321][ C1] RDX: 0000000000001000 RSI: 000000c4202b6000 RDI: 0000000000000003 [ 198.619272][ C1] RBP: 000000c420295760 R08: 0000000000000000 R09: 0000000000000000 [ 198.627224][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 [ 198.635199][ C1] R13: 0000000000000008 R14: 0000000000000020 R15: ffffffffffffffff [ 198.644364][ C1] Kernel Offset: disabled [ 198.648694][ C1] Rebooting in 86400 seconds..