[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.825605][ T32] audit: type=1800 audit(1571404802.876:25): pid=11822 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.849699][ T32] audit: type=1800 audit(1571404802.896:26): pid=11822 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.885793][ T32] audit: type=1800 audit(1571404802.926:27): pid=11822 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 '10.128.0.243' (ECDSA) to the list of known hosts. 2019/10/18 13:20:16 fuzzer started 2019/10/18 13:20:22 dialing manager at 10.128.0.26:46011 2019/10/18 13:20:22 syscalls: 2415 2019/10/18 13:20:22 code coverage: enabled 2019/10/18 13:20:22 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/10/18 13:20:22 extra coverage: enabled 2019/10/18 13:20:22 setuid sandbox: enabled 2019/10/18 13:20:22 namespace sandbox: enabled 2019/10/18 13:20:22 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/18 13:20:22 fault injection: enabled 2019/10/18 13:20:22 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/18 13:20:22 net packet injection: enabled 2019/10/18 13:20:22 net device setup: enabled 2019/10/18 13:20:22 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist syzkaller login: [ 197.535736][ C0] ===================================================== [ 197.542747][ C0] BUG: KMSAN: use-after-free in kmem_cache_alloc_node+0x5d0/0xe70 [ 197.550571][ C0] CPU: 0 PID: 11974 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 197.558148][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 197.568228][ C0] Call Trace: [ 197.571519][ C0] [ 197.574383][ C0] dump_stack+0x191/0x1f0 [ 197.578726][ C0] kmsan_report+0x14a/0x2f0 [ 197.583245][ C0] __msan_warning+0x73/0xf0 [ 197.587759][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 197.593078][ C0] ? __alloc_skb+0x215/0xa10 [ 197.597780][ C0] __alloc_skb+0x215/0xa10 [ 197.602235][ C0] aoecmd_cfg+0x205/0xa80 [ 197.606590][ C0] discover_timer+0x86/0xa0 [ 197.611191][ C0] call_timer_fn+0x232/0x530 [ 197.615791][ C0] ? skbfree+0x4a0/0x4a0 [ 197.620048][ C0] __run_timers+0xd60/0x1270 [ 197.624652][ C0] ? skbfree+0x4a0/0x4a0 [ 197.628918][ C0] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 197.634816][ C0] run_timer_softirq+0x2d/0x50 [ 197.639587][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 197.644532][ C0] __do_softirq+0x4a1/0x83a [ 197.649051][ C0] irq_exit+0x230/0x280 [ 197.653226][ C0] exiting_irq+0xe/0x10 [ 197.657387][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 197.662761][ C0] apic_timer_interrupt+0x2e/0x40 [ 197.667778][ C0] [ 197.670725][ C0] RIP: 0010:kmsan_slab_alloc+0xd5/0x130 [ 197.676350][ C0] Code: 0a ba 01 00 00 00 e8 ba e6 ff ff 65 ff 0d 97 41 fd 7d 65 8b 05 90 41 fd 7d 85 c0 75 30 e8 13 ab 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 [ 197.696060][ C0] RSP: 0018:ffff8880b563f4d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 197.704454][ C0] RAX: 0000000000000000 RBX: ffff88821d6cd400 RCX: 0000000000000101 [ 197.712410][ C0] RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff88821d6cd400 [ 197.720462][ C0] RBP: ffff8880b563f508 R08: 0000000000000001 R09: ffff8880b563f304 [ 197.728429][ C0] R10: 0000000000000011 R11: ffffffff81840bb0 R12: 0000000000000246 [ 197.736377][ C0] R13: 0000000000000000 R14: 0000000000082a20 R15: ffff88812f806c40 [ 197.744428][ C0] ? stack_trace_save+0x1b0/0x1b0 [ 197.749440][ C0] __kmalloc_node_track_caller+0xda2/0x13d0 [ 197.755313][ C0] ? __tcp_send_ack+0xfb/0x840 [ 197.760077][ C0] ? __tcp_send_ack+0xfb/0x840 [ 197.764835][ C0] __alloc_skb+0x306/0xa10 [ 197.769232][ C0] ? __tcp_send_ack+0xfb/0x840 [ 197.773979][ C0] __tcp_send_ack+0xfb/0x840 [ 197.778563][ C0] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 197.784436][ C0] tcp_send_ack+0x68/0x90 [ 197.788769][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 197.793612][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 197.798203][ C0] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 197.804074][ C0] ? tcp_mmap+0x150/0x150 [ 197.808379][ C0] ? tcp_mmap+0x150/0x150 [ 197.812772][ C0] inet_recvmsg+0x237/0x7d0 [ 197.817355][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.822095][ C0] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 197.827979][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.832731][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.837673][ C0] sock_read_iter+0x5be/0x660 [ 197.842354][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 197.848013][ C0] __vfs_read+0xa67/0xc90 [ 197.852339][ C0] vfs_read+0x359/0x6f0 [ 197.856482][ C0] ksys_read+0x265/0x430 [ 197.860823][ C0] __se_sys_read+0x92/0xb0 [ 197.865354][ C0] __x64_sys_read+0x4a/0x70 [ 197.869847][ C0] do_syscall_64+0xb6/0x160 [ 197.874346][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 197.880228][ C0] RIP: 0033:0x47fd44 [ 197.884109][ C0] Code: ff ff cc cc cc cc e8 9b 40 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 [ 197.903692][ C0] RSP: 002b:000000c4203d1710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 197.912077][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 [ 197.920038][ C0] RDX: 0000000000001000 RSI: 000000c4200be000 RDI: 0000000000000003 [ 197.927987][ C0] RBP: 000000c4203d1760 R08: 0000000000000000 R09: 0000000000000000 [ 197.935936][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 197.944003][ C0] R13: 0000000000000004 R14: 0000000000000008 R15: ffffffffffffffff [ 197.952222][ C0] [ 197.954537][ C0] Uninit was stored to memory at: [ 197.959548][ C0] kmsan_internal_chain_origin+0xbd/0x170 [ 197.965244][ C0] __msan_chain_origin+0x6b/0xe0 [ 197.970155][ C0] ___slab_alloc+0x1dbc/0x1fb0 [ 197.974894][ C0] kmem_cache_alloc_node+0x769/0xe70 [ 197.980179][ C0] __alloc_skb+0x215/0xa10 [ 197.984573][ C0] aoecmd_cfg+0x205/0xa80 [ 197.988902][ C0] discover_timer+0x86/0xa0 [ 197.993381][ C0] call_timer_fn+0x232/0x530 [ 197.997946][ C0] __run_timers+0xd60/0x1270 [ 198.002531][ C0] run_timer_softirq+0x2d/0x50 [ 198.007285][ C0] __do_softirq+0x4a1/0x83a [ 198.011765][ C0] irq_exit+0x230/0x280 [ 198.015897][ C0] exiting_irq+0xe/0x10 [ 198.020039][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 198.025388][ C0] apic_timer_interrupt+0x2e/0x40 [ 198.030387][ C0] kmsan_slab_alloc+0xd5/0x130 [ 198.035125][ C0] __kmalloc_node_track_caller+0xda2/0x13d0 [ 198.040995][ C0] __alloc_skb+0x306/0xa10 [ 198.045403][ C0] __tcp_send_ack+0xfb/0x840 [ 198.049969][ C0] tcp_send_ack+0x68/0x90 [ 198.054288][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 198.059128][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 198.063713][ C0] inet_recvmsg+0x237/0x7d0 [ 198.068198][ C0] sock_read_iter+0x5be/0x660 [ 198.072849][ C0] __vfs_read+0xa67/0xc90 [ 198.077150][ C0] vfs_read+0x359/0x6f0 [ 198.081358][ C0] ksys_read+0x265/0x430 [ 198.085593][ C0] __se_sys_read+0x92/0xb0 [ 198.090006][ C0] __x64_sys_read+0x4a/0x70 [ 198.094937][ C0] do_syscall_64+0xb6/0x160 [ 198.099427][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.105308][ C0] [ 198.107617][ C0] Uninit was created at: [ 198.111856][ C0] kmsan_internal_poison_shadow+0x60/0x110 [ 198.117802][ C0] kmsan_slab_free+0x8d/0x100 [ 198.122482][ C0] kmem_cache_free_bulk+0x3ad9/0x3f10 [ 198.127847][ C0] __kfree_skb_flush+0xb0/0x100 [ 198.133084][ C0] net_rx_action+0x1a5e/0x1aa0 [ 198.137957][ C0] __do_softirq+0x4a1/0x83a [ 198.142442][ C0] irq_exit+0x230/0x280 [ 198.146578][ C0] do_IRQ+0x123/0x360 [ 198.150554][ C0] ret_from_intr+0x0/0x33 [ 198.154885][ C0] default_idle+0x53/0x90 [ 198.159356][ C0] arch_cpu_idle+0x25/0x30 [ 198.163765][ C0] do_idle+0x1d5/0x780 [ 198.167832][ C0] cpu_startup_entry+0x45/0x50 [ 198.172708][ C0] rest_init+0x1be/0x1f0 [ 198.176946][ C0] arch_call_rest_init+0x13/0x15 [ 198.182009][ C0] start_kernel+0x987/0xb57 [ 198.186518][ C0] x86_64_start_reservations+0x18/0x2e [ 198.192084][ C0] x86_64_start_kernel+0x81/0x84 [ 198.197129][ C0] secondary_startup_64+0xa4/0xb0 [ 198.202141][ C0] ===================================================== [ 198.209205][ C0] Disabling lock debugging due to kernel taint [ 198.215348][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 198.221928][ C0] CPU: 0 PID: 11974 Comm: syz-fuzzer Tainted: G B 5.4.0-rc3+ #0 [ 198.230850][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 198.241068][ C0] Call Trace: [ 198.244348][ C0] [ 198.247199][ C0] dump_stack+0x191/0x1f0 [ 198.251518][ C0] panic+0x3c9/0xc1e [ 198.255411][ C0] kmsan_report+0x2e8/0x2f0 [ 198.259984][ C0] __msan_warning+0x73/0xf0 [ 198.264543][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 198.269840][ C0] ? __alloc_skb+0x215/0xa10 [ 198.274544][ C0] __alloc_skb+0x215/0xa10 [ 198.278955][ C0] aoecmd_cfg+0x205/0xa80 [ 198.283293][ C0] discover_timer+0x86/0xa0 [ 198.287803][ C0] call_timer_fn+0x232/0x530 [ 198.292522][ C0] ? skbfree+0x4a0/0x4a0 [ 198.296773][ C0] __run_timers+0xd60/0x1270 [ 198.301395][ C0] ? skbfree+0x4a0/0x4a0 [ 198.305631][ C0] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 198.311544][ C0] run_timer_softirq+0x2d/0x50 [ 198.316299][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 198.321235][ C0] __do_softirq+0x4a1/0x83a [ 198.325747][ C0] irq_exit+0x230/0x280 [ 198.329909][ C0] exiting_irq+0xe/0x10 [ 198.334532][ C0] smp_apic_timer_interrupt+0x48/0x70 [ 198.339889][ C0] apic_timer_interrupt+0x2e/0x40 [ 198.344889][ C0] [ 198.347816][ C0] RIP: 0010:kmsan_slab_alloc+0xd5/0x130 [ 198.353337][ C0] Code: 0a ba 01 00 00 00 e8 ba e6 ff ff 65 ff 0d 97 41 fd 7d 65 8b 05 90 41 fd 7d 85 c0 75 30 e8 13 ab 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 [ 198.373020][ C0] RSP: 0018:ffff8880b563f4d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 198.381425][ C0] RAX: 0000000000000000 RBX: ffff88821d6cd400 RCX: 0000000000000101 [ 198.389464][ C0] RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff88821d6cd400 [ 198.397430][ C0] RBP: ffff8880b563f508 R08: 0000000000000001 R09: ffff8880b563f304 [ 198.405436][ C0] R10: 0000000000000011 R11: ffffffff81840bb0 R12: 0000000000000246 [ 198.413410][ C0] R13: 0000000000000000 R14: 0000000000082a20 R15: ffff88812f806c40 [ 198.421393][ C0] ? stack_trace_save+0x1b0/0x1b0 [ 198.426408][ C0] __kmalloc_node_track_caller+0xda2/0x13d0 [ 198.432405][ C0] ? __tcp_send_ack+0xfb/0x840 [ 198.437284][ C0] ? __tcp_send_ack+0xfb/0x840 [ 198.442061][ C0] __alloc_skb+0x306/0xa10 [ 198.446620][ C0] ? __tcp_send_ack+0xfb/0x840 [ 198.451398][ C0] __tcp_send_ack+0xfb/0x840 [ 198.455994][ C0] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 198.461901][ C0] tcp_send_ack+0x68/0x90 [ 198.466639][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 198.471504][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 198.476172][ C0] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 198.482085][ C0] ? tcp_mmap+0x150/0x150 [ 198.486569][ C0] ? tcp_mmap+0x150/0x150 [ 198.491552][ C0] inet_recvmsg+0x237/0x7d0 [ 198.496209][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.500972][ C0] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 198.506855][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.511597][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.516347][ C0] sock_read_iter+0x5be/0x660 [ 198.521034][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 198.526648][ C0] __vfs_read+0xa67/0xc90 [ 198.530971][ C0] vfs_read+0x359/0x6f0 [ 198.535126][ C0] ksys_read+0x265/0x430 [ 198.539476][ C0] __se_sys_read+0x92/0xb0 [ 198.543925][ C0] __x64_sys_read+0x4a/0x70 [ 198.548408][ C0] do_syscall_64+0xb6/0x160 [ 198.553038][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.558912][ C0] RIP: 0033:0x47fd44 [ 198.562880][ C0] Code: ff ff cc cc cc cc e8 9b 40 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 [ 198.582479][ C0] RSP: 002b:000000c4203d1710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 198.590870][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 [ 198.601774][ C0] RDX: 0000000000001000 RSI: 000000c4200be000 RDI: 0000000000000003 [ 198.609723][ C0] RBP: 000000c4203d1760 R08: 0000000000000000 R09: 0000000000000000 [ 198.617668][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 198.625615][ C0] R13: 0000000000000004 R14: 0000000000000008 R15: ffffffffffffffff [ 198.635146][ C0] Kernel Offset: disabled [ 198.639474][ C0] Rebooting in 86400 seconds..