[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 80.951725][ T30] audit: type=1800 audit(1566904918.004:25): pid=11778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 80.981573][ T30] audit: type=1800 audit(1566904918.034:26): pid=11778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 81.001843][ T30] audit: type=1800 audit(1566904918.044:27): pid=11778 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 '10.128.1.40' (ECDSA) to the list of known hosts. 2019/08/27 11:22:11 fuzzer started 2019/08/27 11:22:17 dialing manager at 10.128.0.26:35869 2019/08/27 11:22:17 syscalls: 2376 2019/08/27 11:22:17 code coverage: enabled 2019/08/27 11:22:17 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/08/27 11:22:17 extra coverage: enabled 2019/08/27 11:22:17 setuid sandbox: enabled 2019/08/27 11:22:17 namespace sandbox: enabled 2019/08/27 11:22:17 Android sandbox: /sys/fs/selinux/policy does not exist 2019/08/27 11:22:17 fault injection: enabled 2019/08/27 11:22:17 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/08/27 11:22:17 net packet injection: enabled 2019/08/27 11:22:17 net device setup: enabled syzkaller login: [ 197.523408][ C0] ================================================================== [ 197.532219][ C0] BUG: KMSAN: uninit-value in kmem_cache_alloc_node+0x5d0/0xe70 [ 197.540248][ C0] CPU: 0 PID: 11942 Comm: syz-fuzzer Not tainted 5.3.0-rc3+ #17 [ 197.548006][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 197.558278][ C0] Call Trace: [ 197.561593][ C0] [ 197.564478][ C0] dump_stack+0x191/0x1f0 [ 197.568920][ C0] kmsan_report+0x162/0x2d0 [ 197.573439][ C0] __msan_warning+0x75/0xe0 [ 197.578254][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 197.583535][ C0] ? __alloc_skb+0x215/0xa10 [ 197.588402][ C0] __alloc_skb+0x215/0xa10 [ 197.593053][ C0] aoecmd_cfg+0x205/0xa80 [ 197.597505][ C0] discover_timer+0x86/0xa0 [ 197.602213][ C0] call_timer_fn+0x232/0x530 [ 197.607242][ C0] ? skbfree+0x4a0/0x4a0 [ 197.611809][ C0] __run_timers+0xcdc/0x11a0 [ 197.616615][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 197.622817][ C0] ? skbfree+0x4a0/0x4a0 [ 197.627215][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.633576][ C0] run_timer_softirq+0x2d/0x50 [ 197.638488][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 197.644067][ C0] __do_softirq+0x4a1/0x83a [ 197.648705][ C0] irq_exit+0x230/0x280 [ 197.653215][ C0] exiting_irq+0xe/0x10 [ 197.657544][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 197.663573][ C0] apic_timer_interrupt+0x2e/0x40 [ 197.668798][ C0] [ 197.671858][ C0] RIP: 0010:virt_to_page_or_null+0x15/0x100 [ 197.678454][ C0] Code: 11 08 48 0f a3 38 0f 92 c0 c3 90 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 2d 00 00 00 80 73 29 48 ba 00 00 00 00 80 77 00 00 <48> 01 fa 48 39 c2 76 03 31 c0 c3 8a 0d db 1d c3 0d 48 89 d6 48 d3 [ 197.698644][ C0] RSP: 0018:ffff8880a938f458 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 [ 197.708180][ C0] RAX: ffff88812938f6ac RBX: ffffffff902c1000 RCX: ffff88812fffb000 [ 197.716494][ C0] RDX: 0000778000000000 RSI: ffffea000000000f RDI: ffff8880a938f6ac [ 197.724481][ C0] RBP: ffff8880a938f490 R08: ffffea000000000f R09: ffff88812fffb000 [ 197.732552][ C0] R10: 0000000000000004 R11: ffffffff8182bd40 R12: ffff88810bfc6524 [ 197.741265][ C0] R13: ffff8880a938f6ac R14: ffff8880a938f6ac R15: 0000000000000004 [ 197.749799][ C0] ? stack_trace_save+0x1b0/0x1b0 [ 197.754834][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.761138][ C0] __msan_metadata_ptr_for_load_4+0x10/0x20 [ 197.767179][ C0] tcp_options_write+0x1f0/0xf20 [ 197.772884][ C0] __tcp_transmit_skb+0x11fa/0x5c60 [ 197.778788][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.785827][ C0] ? kmsan_set_origin+0x26d/0x340 [ 197.791151][ C0] __tcp_send_ack+0x701/0x840 [ 197.795868][ C0] tcp_send_ack+0x68/0x90 [ 197.800643][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 197.805499][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 197.810375][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.816555][ C0] ? tcp_mmap+0x150/0x150 [ 197.821141][ C0] ? tcp_mmap+0x150/0x150 [ 197.825644][ C0] inet_recvmsg+0x237/0x7d0 [ 197.830495][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.835269][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.841317][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.846084][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.851404][ C0] sock_read_iter+0x5be/0x660 [ 197.856518][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 197.862249][ C0] __vfs_read+0xa67/0xc90 [ 197.866727][ C0] vfs_read+0x359/0x6f0 [ 197.870982][ C0] ksys_read+0x265/0x430 [ 197.875477][ C0] __se_sys_read+0x92/0xb0 [ 197.880152][ C0] __x64_sys_read+0x4a/0x70 [ 197.884656][ C0] do_syscall_64+0xbc/0xf0 [ 197.889498][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 197.895746][ C0] RIP: 0033:0x47fcb4 [ 197.899764][ 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 [ 197.919868][ C0] RSP: 002b:000000c420339750 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 197.928580][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 197.937190][ C0] RDX: 0000000000001000 RSI: 000000c42029a000 RDI: 0000000000000003 [ 197.945509][ C0] RBP: 000000c4203397a0 R08: 0000000000000000 R09: 0000000000000000 [ 197.953778][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 000000c429f265d8 [ 197.961750][ C0] R13: 0000000000000007 R14: 0000000000c1f220 R15: 00000000000062f8 [ 197.970155][ C0] [ 197.972637][ C0] Uninit was stored to memory at: [ 197.977848][ C0] kmsan_internal_chain_origin+0xcc/0x150 [ 197.983764][ C0] __msan_chain_origin+0x6b/0xe0 [ 197.988867][ C0] ___slab_alloc+0x1dbc/0x1fb0 [ 197.994053][ C0] kmem_cache_alloc_node+0x769/0xe70 [ 197.999398][ C0] __alloc_skb+0x215/0xa10 [ 198.003994][ C0] aoecmd_cfg+0x205/0xa80 [ 198.008319][ C0] discover_timer+0x86/0xa0 [ 198.012896][ C0] call_timer_fn+0x232/0x530 [ 198.017866][ C0] __run_timers+0xcdc/0x11a0 [ 198.022542][ C0] run_timer_softirq+0x2d/0x50 [ 198.027483][ C0] __do_softirq+0x4a1/0x83a [ 198.032401][ C0] irq_exit+0x230/0x280 [ 198.036700][ C0] exiting_irq+0xe/0x10 [ 198.040977][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 198.046404][ C0] apic_timer_interrupt+0x2e/0x40 [ 198.051818][ C0] virt_to_page_or_null+0x15/0x100 [ 198.057045][ C0] __msan_metadata_ptr_for_load_4+0x10/0x20 [ 198.063029][ C0] tcp_options_write+0x1f0/0xf20 [ 198.068186][ C0] __tcp_transmit_skb+0x11fa/0x5c60 [ 198.073784][ C0] __tcp_send_ack+0x701/0x840 [ 198.078628][ C0] tcp_send_ack+0x68/0x90 [ 198.083335][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 198.088291][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 198.092887][ C0] inet_recvmsg+0x237/0x7d0 [ 198.097553][ C0] sock_read_iter+0x5be/0x660 [ 198.102472][ C0] __vfs_read+0xa67/0xc90 [ 198.106985][ C0] vfs_read+0x359/0x6f0 [ 198.111302][ C0] ksys_read+0x265/0x430 [ 198.115639][ C0] __se_sys_read+0x92/0xb0 [ 198.120248][ C0] __x64_sys_read+0x4a/0x70 [ 198.124933][ C0] do_syscall_64+0xbc/0xf0 [ 198.129472][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.136080][ C0] [ 198.138517][ C0] Uninit was created at: [ 198.142763][ C0] kmsan_internal_poison_shadow+0x53/0xa0 [ 198.148476][ C0] kmsan_slab_free+0x8d/0x100 [ 198.153141][ C0] kmem_cache_free_bulk+0x3ad9/0x3f50 [ 198.159264][ C0] __kfree_skb_flush+0xb0/0x100 [ 198.164467][ C0] net_rx_action+0x1908/0x1950 [ 198.169381][ C0] __do_softirq+0x4a1/0x83a [ 198.174018][ C0] irq_exit+0x230/0x280 [ 198.178351][ C0] do_IRQ+0x20d/0x3a0 [ 198.182355][ C0] ret_from_intr+0x0/0x33 [ 198.186853][ C0] default_idle+0x53/0x90 [ 198.191234][ C0] arch_cpu_idle+0x25/0x30 [ 198.195774][ C0] do_idle+0x1d7/0x790 [ 198.199846][ C0] cpu_startup_entry+0x45/0x50 [ 198.204602][ C0] rest_init+0x1be/0x1f0 [ 198.208830][ C0] arch_call_rest_init+0x13/0x15 [ 198.213955][ C0] start_kernel+0x991/0xb61 [ 198.218613][ C0] x86_64_start_reservations+0x18/0x2e [ 198.224233][ C0] x86_64_start_kernel+0x81/0x84 [ 198.229188][ C0] secondary_startup_64+0xa4/0xb0 [ 198.234416][ C0] ================================================================== [ 198.243264][ C0] Disabling lock debugging due to kernel taint [ 198.249823][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 198.256456][ C0] CPU: 0 PID: 11942 Comm: syz-fuzzer Tainted: G B 5.3.0-rc3+ #17 [ 198.265608][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 198.276164][ C0] Call Trace: [ 198.279453][ C0] [ 198.282312][ C0] dump_stack+0x191/0x1f0 [ 198.286918][ C0] panic+0x3c9/0xc1e [ 198.290966][ C0] kmsan_report+0x2ca/0x2d0 [ 198.295536][ C0] __msan_warning+0x75/0xe0 [ 198.300237][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 198.305579][ C0] ? __alloc_skb+0x215/0xa10 [ 198.310597][ C0] __alloc_skb+0x215/0xa10 [ 198.315152][ C0] aoecmd_cfg+0x205/0xa80 [ 198.319606][ C0] discover_timer+0x86/0xa0 [ 198.324523][ C0] call_timer_fn+0x232/0x530 [ 198.329269][ C0] ? skbfree+0x4a0/0x4a0 [ 198.333657][ C0] __run_timers+0xcdc/0x11a0 [ 198.338450][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 198.344724][ C0] ? skbfree+0x4a0/0x4a0 [ 198.349039][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.355199][ C0] run_timer_softirq+0x2d/0x50 [ 198.360113][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 198.365493][ C0] __do_softirq+0x4a1/0x83a [ 198.370270][ C0] irq_exit+0x230/0x280 [ 198.374428][ C0] exiting_irq+0xe/0x10 [ 198.378642][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 198.384537][ C0] apic_timer_interrupt+0x2e/0x40 [ 198.389562][ C0] [ 198.392498][ C0] RIP: 0010:virt_to_page_or_null+0x15/0x100 [ 198.398710][ C0] Code: 11 08 48 0f a3 38 0f 92 c0 c3 90 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 2d 00 00 00 80 73 29 48 ba 00 00 00 00 80 77 00 00 <48> 01 fa 48 39 c2 76 03 31 c0 c3 8a 0d db 1d c3 0d 48 89 d6 48 d3 [ 198.418847][ C0] RSP: 0018:ffff8880a938f458 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 [ 198.427316][ C0] RAX: ffff88812938f6ac RBX: ffffffff902c1000 RCX: ffff88812fffb000 [ 198.435522][ C0] RDX: 0000778000000000 RSI: ffffea000000000f RDI: ffff8880a938f6ac [ 198.443493][ C0] RBP: ffff8880a938f490 R08: ffffea000000000f R09: ffff88812fffb000 [ 198.452137][ C0] R10: 0000000000000004 R11: ffffffff8182bd40 R12: ffff88810bfc6524 [ 198.460369][ C0] R13: ffff8880a938f6ac R14: ffff8880a938f6ac R15: 0000000000000004 [ 198.468357][ C0] ? stack_trace_save+0x1b0/0x1b0 [ 198.473386][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.479507][ C0] __msan_metadata_ptr_for_load_4+0x10/0x20 [ 198.485680][ C0] tcp_options_write+0x1f0/0xf20 [ 198.490683][ C0] __tcp_transmit_skb+0x11fa/0x5c60 [ 198.495892][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.501936][ C0] ? kmsan_set_origin+0x26d/0x340 [ 198.507050][ C0] __tcp_send_ack+0x701/0x840 [ 198.511927][ C0] tcp_send_ack+0x68/0x90 [ 198.516429][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 198.521509][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 198.526396][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.532533][ C0] ? tcp_mmap+0x150/0x150 [ 198.536947][ C0] ? tcp_mmap+0x150/0x150 [ 198.541355][ C0] inet_recvmsg+0x237/0x7d0 [ 198.545867][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.550707][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.556679][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.561439][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.566290][ C0] sock_read_iter+0x5be/0x660 [ 198.571090][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 198.576976][ C0] __vfs_read+0xa67/0xc90 [ 198.581478][ C0] vfs_read+0x359/0x6f0 [ 198.585632][ C0] ksys_read+0x265/0x430 [ 198.590180][ C0] __se_sys_read+0x92/0xb0 [ 198.594643][ C0] __x64_sys_read+0x4a/0x70 [ 198.599148][ C0] do_syscall_64+0xbc/0xf0 [ 198.603835][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.610128][ C0] RIP: 0033:0x47fcb4 [ 198.614015][ 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 [ 198.634195][ C0] RSP: 002b:000000c420339750 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 198.642723][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 198.651090][ C0] RDX: 0000000000001000 RSI: 000000c42029a000 RDI: 0000000000000003 [ 198.659196][ C0] RBP: 000000c4203397a0 R08: 0000000000000000 R09: 0000000000000000 [ 198.667249][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 000000c429f265d8 [ 198.676987][ C0] R13: 0000000000000007 R14: 0000000000c1f220 R15: 00000000000062f8 [ 198.694611][ C0] Kernel Offset: disabled [ 198.699148][ C0] Rebooting in 86400 seconds..