[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.825865][ T30] audit: type=1800 audit(1565623154.885:25): pid=12650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.849059][ T30] audit: type=1800 audit(1565623154.905:26): pid=12650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.892283][ T30] audit: type=1800 audit(1565623154.935:27): pid=12650 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 '10.128.0.201' (ECDSA) to the list of known hosts. 2019/08/12 15:19:30 fuzzer started 2019/08/12 15:19:36 dialing manager at 10.128.0.26:33059 2019/08/12 15:19:36 syscalls: 2374 2019/08/12 15:19:36 code coverage: enabled 2019/08/12 15:19:36 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/08/12 15:19:36 extra coverage: enabled 2019/08/12 15:19:36 setuid sandbox: enabled 2019/08/12 15:19:36 namespace sandbox: enabled 2019/08/12 15:19:36 Android sandbox: /sys/fs/selinux/policy does not exist 2019/08/12 15:19:36 fault injection: enabled 2019/08/12 15:19:36 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/08/12 15:19:36 net packet injection: enabled 2019/08/12 15:19:36 net device setup: enabled syzkaller login: [ 197.523158][ C0] ================================================================== [ 197.534022][ C0] BUG: KMSAN: uninit-value in kmem_cache_alloc_node+0x5d0/0xe70 [ 197.542446][ C0] CPU: 0 PID: 12801 Comm: syz-fuzzer Not tainted 5.3.0-rc3+ #17 [ 197.550388][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 197.561130][ C0] Call Trace: [ 197.564853][ C0] [ 197.567696][ C0] dump_stack+0x191/0x1f0 [ 197.572314][ C0] kmsan_report+0x162/0x2d0 [ 197.577435][ C0] __msan_warning+0x75/0xe0 [ 197.581931][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 197.587206][ C0] ? __alloc_skb+0x215/0xa10 [ 197.592045][ C0] __alloc_skb+0x215/0xa10 [ 197.596452][ C0] aoecmd_cfg+0x205/0xa80 [ 197.600772][ C0] discover_timer+0x86/0xa0 [ 197.605790][ C0] call_timer_fn+0x232/0x530 [ 197.610408][ C0] ? skbfree+0x4a0/0x4a0 [ 197.614641][ C0] __run_timers+0xcdc/0x11a0 [ 197.619223][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 197.625642][ C0] ? skbfree+0x4a0/0x4a0 [ 197.629879][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.636174][ C0] run_timer_softirq+0x2d/0x50 [ 197.640941][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 197.646464][ C0] __do_softirq+0x4a1/0x83a [ 197.650983][ C0] irq_exit+0x230/0x280 [ 197.655143][ C0] exiting_irq+0xe/0x10 [ 197.659301][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 197.664831][ C0] apic_timer_interrupt+0x2e/0x40 [ 197.670039][ C0] [ 197.673056][ C0] RIP: 0010:kmsan_slab_alloc+0xd5/0x120 [ 197.678831][ C0] Code: 0a ba 01 00 00 00 e8 da ce ff ff 65 ff 0d 27 bf fe 7d 65 8b 05 20 bf fe 7d 85 c0 75 30 e8 43 fc 37 ff 4c 89 65 c8 ff 75 c8 9d <65> 48 8b 04 25 28 00 00 00 48 3b 45 d8 75 0d 48 83 c4 18 5b 41 5c [ 197.698605][ C0] RSP: 0018:ffff8880ae24f4f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 197.707093][ C0] RAX: 0000000000000000 RBX: ffff88810985d800 RCX: 0000000000000039 [ 197.715392][ C0] RDX: 0000000000000038 RSI: ffffd0ffffffffff RDI: ffff88810985d8e0 [ 197.723441][ C0] RBP: ffff8880ae24f530 R08: ffffea000000000f R09: ffff88812fffb000 [ 197.731399][ C0] R10: 0000000000000011 R11: ffffffff8182bd40 R12: 0000000000000246 [ 197.739798][ C0] R13: ffffffffffffff00 R14: 0000000000002a20 R15: ffff88812d594e00 [ 197.747886][ C0] ? stack_trace_save+0x1b0/0x1b0 [ 197.753821][ C0] kmem_cache_alloc_node+0x8f8/0xe70 [ 197.759180][ C0] ? __alloc_skb+0x215/0xa10 [ 197.763759][ C0] __alloc_skb+0x215/0xa10 [ 197.768378][ C0] __tcp_send_ack+0xfb/0x840 [ 197.772951][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.779016][ C0] tcp_send_ack+0x68/0x90 [ 197.783417][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 197.788270][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 197.792868][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.798824][ C0] ? tcp_mmap+0x150/0x150 [ 197.803150][ C0] ? tcp_mmap+0x150/0x150 [ 197.807463][ C0] inet_recvmsg+0x237/0x7d0 [ 197.812075][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.816839][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.823167][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.828001][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.832842][ C0] sock_read_iter+0x5be/0x660 [ 197.837536][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 197.843382][ C0] __vfs_read+0xa67/0xc90 [ 197.847887][ C0] vfs_read+0x359/0x6f0 [ 197.852381][ C0] ksys_read+0x265/0x430 [ 197.857115][ C0] __se_sys_read+0x92/0xb0 [ 197.861518][ C0] __x64_sys_read+0x4a/0x70 [ 197.866211][ C0] do_syscall_64+0xbc/0xf0 [ 197.870737][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 197.876789][ C0] RIP: 0033:0x47fcb4 [ 197.880826][ 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 [ 197.901216][ C0] RSP: 002b:000000c4201bb760 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 197.909626][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 197.917611][ C0] RDX: 0000000000001000 RSI: 000000c4203cc000 RDI: 0000000000000003 [ 197.925701][ C0] RBP: 000000c4201bb7b0 R08: 0000000000000000 R09: 0000000000000000 [ 197.933667][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 197.941627][ C0] R13: 0000000000000004 R14: 0000000000000020 R15: ffffffffffffffff [ 197.949602][ C0] [ 197.951913][ C0] Uninit was stored to memory at: [ 197.957010][ C0] kmsan_internal_chain_origin+0xcc/0x150 [ 197.962811][ C0] __msan_chain_origin+0x6b/0xe0 [ 197.967904][ C0] ___slab_alloc+0x1dbc/0x1fb0 [ 197.972744][ C0] kmem_cache_alloc_node+0x769/0xe70 [ 197.978008][ C0] __alloc_skb+0x215/0xa10 [ 197.982419][ C0] aoecmd_cfg+0x205/0xa80 [ 197.986724][ C0] discover_timer+0x86/0xa0 [ 197.991375][ C0] call_timer_fn+0x232/0x530 [ 197.996133][ C0] __run_timers+0xcdc/0x11a0 [ 198.004081][ C0] run_timer_softirq+0x2d/0x50 [ 198.008832][ C0] __do_softirq+0x4a1/0x83a [ 198.013630][ C0] irq_exit+0x230/0x280 [ 198.017766][ C0] exiting_irq+0xe/0x10 [ 198.022109][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 198.027477][ C0] apic_timer_interrupt+0x2e/0x40 [ 198.039103][ C0] kmsan_slab_alloc+0xd5/0x120 [ 198.043856][ C0] kmem_cache_alloc_node+0x8f8/0xe70 [ 198.049384][ C0] __alloc_skb+0x215/0xa10 [ 198.054271][ C0] __tcp_send_ack+0xfb/0x840 [ 198.059787][ C0] tcp_send_ack+0x68/0x90 [ 198.071731][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 198.083750][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 198.088330][ C0] inet_recvmsg+0x237/0x7d0 [ 198.093077][ C0] sock_read_iter+0x5be/0x660 [ 198.098219][ C0] __vfs_read+0xa67/0xc90 [ 198.102797][ C0] vfs_read+0x359/0x6f0 [ 198.106944][ C0] ksys_read+0x265/0x430 [ 198.112674][ C0] __se_sys_read+0x92/0xb0 [ 198.117447][ C0] __x64_sys_read+0x4a/0x70 [ 198.122045][ C0] do_syscall_64+0xbc/0xf0 [ 198.127015][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.132979][ C0] [ 198.135293][ C0] Uninit was created at: [ 198.139817][ C0] kmsan_internal_poison_shadow+0x53/0xa0 [ 198.147356][ C0] kmsan_slab_free+0x8d/0x100 [ 198.153828][ C0] kmem_cache_free_bulk+0x3ad9/0x3f50 [ 198.159183][ C0] __kfree_skb_flush+0xb0/0x100 [ 198.164014][ C0] net_rx_action+0x1908/0x1950 [ 198.168782][ C0] __do_softirq+0x4a1/0x83a [ 198.173652][ C0] irq_exit+0x230/0x280 [ 198.177784][ C0] do_IRQ+0x20d/0x3a0 [ 198.181743][ C0] ret_from_intr+0x0/0x33 [ 198.186067][ C0] default_idle+0x53/0x90 [ 198.190397][ C0] arch_cpu_idle+0x25/0x30 [ 198.194792][ C0] do_idle+0x1d7/0x790 [ 198.198840][ C0] cpu_startup_entry+0x45/0x50 [ 198.203583][ C0] rest_init+0x1be/0x1f0 [ 198.208471][ C0] arch_call_rest_init+0x13/0x15 [ 198.213612][ C0] start_kernel+0x991/0xb61 [ 198.218094][ C0] x86_64_start_reservations+0x18/0x2e [ 198.223547][ C0] x86_64_start_kernel+0x81/0x84 [ 198.228554][ C0] secondary_startup_64+0xa4/0xb0 [ 198.234102][ C0] ================================================================== [ 198.243007][ C0] Disabling lock debugging due to kernel taint [ 198.249223][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 198.255988][ C0] CPU: 0 PID: 12801 Comm: syz-fuzzer Tainted: G B 5.3.0-rc3+ #17 [ 198.264991][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 198.278227][ C0] Call Trace: [ 198.282631][ C0] [ 198.286362][ C0] dump_stack+0x191/0x1f0 [ 198.291736][ C0] panic+0x3c9/0xc1e [ 198.296733][ C0] kmsan_report+0x2ca/0x2d0 [ 198.302546][ C0] __msan_warning+0x75/0xe0 [ 198.308084][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 198.314414][ C0] ? __alloc_skb+0x215/0xa10 [ 198.328253][ C0] __alloc_skb+0x215/0xa10 [ 198.332682][ C0] aoecmd_cfg+0x205/0xa80 [ 198.343911][ C0] discover_timer+0x86/0xa0 [ 198.349278][ C0] call_timer_fn+0x232/0x530 [ 198.353989][ C0] ? skbfree+0x4a0/0x4a0 [ 198.358214][ C0] __run_timers+0xcdc/0x11a0 [ 198.363276][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 198.369357][ C0] ? skbfree+0x4a0/0x4a0 [ 198.374636][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.380698][ C0] run_timer_softirq+0x2d/0x50 [ 198.386359][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 198.391662][ C0] __do_softirq+0x4a1/0x83a [ 198.396401][ C0] irq_exit+0x230/0x280 [ 198.407307][ C0] exiting_irq+0xe/0x10 [ 198.411622][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 198.417124][ C0] apic_timer_interrupt+0x2e/0x40 [ 198.422213][ C0] [ 198.432170][ C0] RIP: 0010:kmsan_slab_alloc+0xd5/0x120 [ 198.437757][ C0] Code: 0a ba 01 00 00 00 e8 da ce ff ff 65 ff 0d 27 bf fe 7d 65 8b 05 20 bf fe 7d 85 c0 75 30 e8 43 fc 37 ff 4c 89 65 c8 ff 75 c8 9d <65> 48 8b 04 25 28 00 00 00 48 3b 45 d8 75 0d 48 83 c4 18 5b 41 5c [ 198.457627][ C0] RSP: 0018:ffff8880ae24f4f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 198.466931][ C0] RAX: 0000000000000000 RBX: ffff88810985d800 RCX: 0000000000000039 [ 198.474887][ C0] RDX: 0000000000000038 RSI: ffffd0ffffffffff RDI: ffff88810985d8e0 [ 198.482927][ C0] RBP: ffff8880ae24f530 R08: ffffea000000000f R09: ffff88812fffb000 [ 198.491073][ C0] R10: 0000000000000011 R11: ffffffff8182bd40 R12: 0000000000000246 [ 198.499029][ C0] R13: ffffffffffffff00 R14: 0000000000002a20 R15: ffff88812d594e00 [ 198.507173][ C0] ? stack_trace_save+0x1b0/0x1b0 [ 198.512193][ C0] kmem_cache_alloc_node+0x8f8/0xe70 [ 198.517498][ C0] ? __alloc_skb+0x215/0xa10 [ 198.522890][ C0] __alloc_skb+0x215/0xa10 [ 198.527468][ C0] __tcp_send_ack+0xfb/0x840 [ 198.533608][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.539567][ C0] tcp_send_ack+0x68/0x90 [ 198.543888][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 198.548723][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 198.553316][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.570567][ C0] ? tcp_mmap+0x150/0x150 [ 198.574885][ C0] ? tcp_mmap+0x150/0x150 [ 198.579201][ C0] inet_recvmsg+0x237/0x7d0 [ 198.583795][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.588540][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.594596][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.611678][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.616430][ C0] sock_read_iter+0x5be/0x660 [ 198.621197][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 198.626813][ C0] __vfs_read+0xa67/0xc90 [ 198.631138][ C0] vfs_read+0x359/0x6f0 [ 198.635278][ C0] ksys_read+0x265/0x430 [ 198.639614][ C0] __se_sys_read+0x92/0xb0 [ 198.644040][ C0] __x64_sys_read+0x4a/0x70 [ 198.648526][ C0] do_syscall_64+0xbc/0xf0 [ 198.652926][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.658795][ C0] RIP: 0033:0x47fcb4 [ 198.662671][ 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 [ 198.682340][ C0] RSP: 002b:000000c4201bb760 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 198.690726][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 198.699123][ C0] RDX: 0000000000001000 RSI: 000000c4203cc000 RDI: 0000000000000003 [ 198.707183][ C0] RBP: 000000c4201bb7b0 R08: 0000000000000000 R09: 0000000000000000 [ 198.715221][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 198.723206][ C0] R13: 0000000000000004 R14: 0000000000000020 R15: ffffffffffffffff [ 198.733293][ C0] Kernel Offset: disabled [ 198.737624][ C0] Rebooting in 86400 seconds..