[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 82.314418][ T31] audit: type=1800 audit(1565041529.386:25): pid=11530 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.337739][ T31] audit: type=1800 audit(1565041529.406:26): pid=11530 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.384879][ T31] audit: type=1800 audit(1565041529.456:27): pid=11530 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 '10.128.10.30' (ECDSA) to the list of known hosts. 2019/08/05 21:45:42 fuzzer started 2019/08/05 21:45:47 dialing manager at 10.128.0.26:46627 2019/08/05 21:45:47 syscalls: 2367 2019/08/05 21:45:47 code coverage: enabled 2019/08/05 21:45:47 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/08/05 21:45:47 extra coverage: enabled 2019/08/05 21:45:47 setuid sandbox: enabled 2019/08/05 21:45:47 namespace sandbox: enabled 2019/08/05 21:45:47 Android sandbox: /sys/fs/selinux/policy does not exist 2019/08/05 21:45:47 fault injection: enabled 2019/08/05 21:45:47 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/08/05 21:45:47 net packet injection: enabled 2019/08/05 21:45:47 net device setup: enabled syzkaller login: [ 136.074987][ C0] ================================================================== [ 136.083128][ C0] BUG: KMSAN: uninit-value in kmem_cache_alloc_node+0x5d0/0xe70 [ 136.090779][ C0] CPU: 0 PID: 11682 Comm: syz-fuzzer Not tainted 5.3.0-rc3+ #16 [ 136.098403][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 136.108461][ C0] Call Trace: [ 136.111746][ C0] [ 136.114607][ C0] dump_stack+0x191/0x1f0 [ 136.118956][ C0] kmsan_report+0x162/0x2d0 [ 136.123476][ C0] __msan_warning+0x75/0xe0 [ 136.127993][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 136.133282][ C0] ? __alloc_skb+0x215/0xa10 [ 136.137897][ C0] __alloc_skb+0x215/0xa10 [ 136.142339][ C0] aoecmd_cfg+0x205/0xa80 [ 136.146697][ C0] discover_timer+0x86/0xa0 [ 136.151201][ C0] call_timer_fn+0x232/0x530 [ 136.155794][ C0] ? skbfree+0x4a0/0x4a0 [ 136.160044][ C0] __run_timers+0xcdc/0x11a0 [ 136.164731][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 136.170885][ C0] ? skbfree+0x4a0/0x4a0 [ 136.175331][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 136.181295][ C0] run_timer_softirq+0x2d/0x50 [ 136.186098][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 136.191035][ C0] __do_softirq+0x4a1/0x83a [ 136.195526][ C0] do_softirq_own_stack+0x49/0x80 [ 136.200534][ C0] [ 136.203457][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 136.208659][ C0] local_bh_enable+0x36/0x40 [ 136.213244][ C0] ip_finish_output2+0x20dc/0x25d0 [ 136.218341][ C0] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 136.224398][ C0] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 136.230385][ C0] __ip_finish_output+0xaf8/0xda0 [ 136.235421][ C0] ip_finish_output+0x2db/0x420 [ 136.240257][ C0] ip_output+0x541/0x610 [ 136.244484][ C0] ? ip_mc_finish_output+0x6d0/0x6d0 [ 136.249746][ C0] ? ip_finish_output+0x420/0x420 [ 136.254748][ C0] __ip_queue_xmit+0x1caf/0x21f0 [ 136.259667][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 136.265625][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 136.271669][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 136.277749][ C0] ip_queue_xmit+0xcc/0xf0 [ 136.282148][ C0] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 136.287766][ C0] __tcp_transmit_skb+0x409e/0x5c60 [ 136.292963][ C0] __tcp_send_ack+0x701/0x840 [ 136.297715][ C0] tcp_send_ack+0x68/0x90 [ 136.302125][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 136.306959][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 136.311689][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 136.317667][ C0] ? tcp_mmap+0x150/0x150 [ 136.321977][ C0] ? tcp_mmap+0x150/0x150 [ 136.326286][ C0] inet_recvmsg+0x237/0x7d0 [ 136.330779][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 136.335533][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 136.341529][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 136.346364][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 136.351117][ C0] sock_read_iter+0x5be/0x660 [ 136.355780][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 136.361388][ C0] __vfs_read+0xa67/0xc90 [ 136.365711][ C0] vfs_read+0x359/0x6f0 [ 136.369849][ C0] ksys_read+0x265/0x430 [ 136.374230][ C0] __se_sys_read+0x92/0xb0 [ 136.378627][ C0] __x64_sys_read+0x4a/0x70 [ 136.383122][ C0] do_syscall_64+0xbc/0xf0 [ 136.387519][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 136.393386][ C0] RIP: 0033:0x47fcb4 [ 136.397266][ C0] 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 [ 136.416865][ C0] RSP: 002b:000000c4202f5710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 136.425258][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 136.433214][ C0] RDX: 0000000000001000 RSI: 000000c42035a000 RDI: 0000000000000003 [ 136.441341][ C0] RBP: 000000c4202f5760 R08: 0000000000000000 R09: 0000000000000000 [ 136.449300][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 136.457249][ C0] R13: 0000000000000004 R14: 0000000000000002 R15: ffffffffffffffff [ 136.465227][ C0] [ 136.467541][ C0] Uninit was stored to memory at: [ 136.472650][ C0] kmsan_internal_chain_origin+0xcc/0x150 [ 136.478351][ C0] __msan_chain_origin+0x6b/0xe0 [ 136.483262][ C0] ___slab_alloc+0x1dbc/0x1fb0 [ 136.488006][ C0] kmem_cache_alloc_node+0x769/0xe70 [ 136.493458][ C0] __alloc_skb+0x215/0xa10 [ 136.497851][ C0] aoecmd_cfg+0x205/0xa80 [ 136.502153][ C0] discover_timer+0x86/0xa0 [ 136.506630][ C0] call_timer_fn+0x232/0x530 [ 136.511232][ C0] __run_timers+0xcdc/0x11a0 [ 136.515801][ C0] run_timer_softirq+0x2d/0x50 [ 136.520542][ C0] __do_softirq+0x4a1/0x83a [ 136.525031][ C0] do_softirq_own_stack+0x49/0x80 [ 136.530035][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 136.535237][ C0] local_bh_enable+0x36/0x40 [ 136.539822][ C0] ip_finish_output2+0x20dc/0x25d0 [ 136.544912][ C0] __ip_finish_output+0xaf8/0xda0 [ 136.549915][ C0] ip_finish_output+0x2db/0x420 [ 136.554741][ C0] ip_output+0x541/0x610 [ 136.558970][ C0] __ip_queue_xmit+0x1caf/0x21f0 [ 136.563884][ C0] ip_queue_xmit+0xcc/0xf0 [ 136.568273][ C0] __tcp_transmit_skb+0x409e/0x5c60 [ 136.573453][ C0] __tcp_send_ack+0x701/0x840 [ 136.578182][ C0] tcp_send_ack+0x68/0x90 [ 136.582489][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 136.587323][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 136.591890][ C0] inet_recvmsg+0x237/0x7d0 [ 136.596376][ C0] sock_read_iter+0x5be/0x660 [ 136.601033][ C0] __vfs_read+0xa67/0xc90 [ 136.605351][ C0] vfs_read+0x359/0x6f0 [ 136.609483][ C0] ksys_read+0x265/0x430 [ 136.613727][ C0] __se_sys_read+0x92/0xb0 [ 136.618123][ C0] __x64_sys_read+0x4a/0x70 [ 136.622607][ C0] do_syscall_64+0xbc/0xf0 [ 136.627010][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 136.632871][ C0] [ 136.635202][ C0] Uninit was created at: [ 136.639451][ C0] kmsan_internal_poison_shadow+0x53/0xa0 [ 136.645167][ C0] kmsan_slab_free+0x8d/0x100 [ 136.649825][ C0] kmem_cache_free_bulk+0x3ad9/0x3f50 [ 136.655177][ C0] __kfree_skb_flush+0xb0/0x100 [ 136.660009][ C0] net_rx_action+0x1908/0x1950 [ 136.664753][ C0] __do_softirq+0x4a1/0x83a [ 136.669250][ C0] irq_exit+0x230/0x280 [ 136.673480][ C0] do_IRQ+0x20d/0x3a0 [ 136.677537][ C0] ret_from_intr+0x0/0x33 [ 136.682023][ C0] do_user_addr_fault+0x2de/0x1510 [ 136.687221][ C0] __do_page_fault+0x1a2/0x410 [ 136.692058][ C0] do_page_fault+0xbb/0x500 [ 136.696799][ C0] page_fault+0x4e/0x60 [ 136.700929][ C0] ================================================================== [ 136.709265][ C0] Disabling lock debugging due to kernel taint [ 136.715402][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 136.721970][ C0] CPU: 0 PID: 11682 Comm: syz-fuzzer Tainted: G B 5.3.0-rc3+ #16 [ 136.730977][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 136.741109][ C0] Call Trace: [ 136.744375][ C0] [ 136.747259][ C0] dump_stack+0x191/0x1f0 [ 136.751583][ C0] panic+0x3c9/0xc1e [ 136.755471][ C0] kmsan_report+0x2ca/0x2d0 [ 136.759953][ C0] __msan_warning+0x75/0xe0 [ 136.764439][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 136.769704][ C0] ? __alloc_skb+0x215/0xa10 [ 136.774297][ C0] __alloc_skb+0x215/0xa10 [ 136.778717][ C0] aoecmd_cfg+0x205/0xa80 [ 136.783033][ C0] discover_timer+0x86/0xa0 [ 136.787518][ C0] call_timer_fn+0x232/0x530 [ 136.794528][ C0] ? skbfree+0x4a0/0x4a0 [ 136.798782][ C0] __run_timers+0xcdc/0x11a0 [ 136.803391][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 136.809444][ C0] ? skbfree+0x4a0/0x4a0 [ 136.813680][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 136.819641][ C0] run_timer_softirq+0x2d/0x50 [ 136.824475][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 136.829479][ C0] __do_softirq+0x4a1/0x83a [ 136.834011][ C0] do_softirq_own_stack+0x49/0x80 [ 136.839017][ C0] [ 136.841938][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 136.847122][ C0] local_bh_enable+0x36/0x40 [ 136.851692][ C0] ip_finish_output2+0x20dc/0x25d0 [ 136.856794][ C0] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 136.862842][ C0] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 136.868815][ C0] __ip_finish_output+0xaf8/0xda0 [ 136.873834][ C0] ip_finish_output+0x2db/0x420 [ 136.878673][ C0] ip_output+0x541/0x610 [ 136.882904][ C0] ? ip_mc_finish_output+0x6d0/0x6d0 [ 136.888177][ C0] ? ip_finish_output+0x420/0x420 [ 136.893178][ C0] __ip_queue_xmit+0x1caf/0x21f0 [ 136.898096][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 136.904053][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 136.910093][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 136.916159][ C0] ip_queue_xmit+0xcc/0xf0 [ 136.920559][ C0] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 136.926180][ C0] __tcp_transmit_skb+0x409e/0x5c60 [ 136.931387][ C0] __tcp_send_ack+0x701/0x840 [ 136.936051][ C0] tcp_send_ack+0x68/0x90 [ 136.940361][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 136.945284][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 136.949880][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 136.955862][ C0] ? tcp_mmap+0x150/0x150 [ 136.960190][ C0] ? tcp_mmap+0x150/0x150 [ 136.964541][ C0] inet_recvmsg+0x237/0x7d0 [ 136.969041][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 136.973784][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 136.979752][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 136.984508][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 136.989254][ C0] sock_read_iter+0x5be/0x660 [ 136.993941][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 136.999560][ C0] __vfs_read+0xa67/0xc90 [ 137.003882][ C0] vfs_read+0x359/0x6f0 [ 137.008025][ C0] ksys_read+0x265/0x430 [ 137.012258][ C0] __se_sys_read+0x92/0xb0 [ 137.016674][ C0] __x64_sys_read+0x4a/0x70 [ 137.021158][ C0] do_syscall_64+0xbc/0xf0 [ 137.025642][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 137.031510][ C0] RIP: 0033:0x47fcb4 [ 137.035401][ C0] 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 [ 137.055281][ C0] RSP: 002b:000000c4202f5710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 137.064755][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 137.072717][ C0] RDX: 0000000000001000 RSI: 000000c42035a000 RDI: 0000000000000003 [ 137.080848][ C0] RBP: 000000c4202f5760 R08: 0000000000000000 R09: 0000000000000000 [ 137.088918][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 137.096969][ C0] R13: 0000000000000004 R14: 0000000000000002 R15: ffffffffffffffff [ 137.106723][ C0] Kernel Offset: disabled [ 137.111257][ C0] Rebooting in 86400 seconds..