[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 82.115822][ T31] audit: type=1800 audit(1569599173.167:25): pid=11816 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.139191][ T31] audit: type=1800 audit(1569599173.187:26): pid=11816 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.174166][ T31] audit: type=1800 audit(1569599173.217:27): pid=11816 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 '10.128.0.137' (ECDSA) to the list of known hosts. 2019/09/27 15:46:25 fuzzer started 2019/09/27 15:46:30 dialing manager at 10.128.0.26:37065 2019/09/27 15:46:30 syscalls: 2385 2019/09/27 15:46:30 code coverage: enabled 2019/09/27 15:46:30 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/09/27 15:46:30 extra coverage: enabled 2019/09/27 15:46:30 setuid sandbox: enabled 2019/09/27 15:46:30 namespace sandbox: enabled 2019/09/27 15:46:30 Android sandbox: /sys/fs/selinux/policy does not exist 2019/09/27 15:46:30 fault injection: enabled 2019/09/27 15:46:30 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/09/27 15:46:30 net packet injection: enabled 2019/09/27 15:46:30 net device setup: enabled syzkaller login: [ 131.487788][T11970] ================================================================== [ 131.495925][T11970] BUG: KMSAN: uninit-value in kmem_cache_free+0x3df/0x2b70 [ 131.503122][T11970] CPU: 0 PID: 11970 Comm: syz-fuzzer Not tainted 5.3.0-rc7+ #0 [ 131.510652][T11970] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 131.520685][T11970] Call Trace: [ 131.523962][T11970] dump_stack+0x191/0x1f0 [ 131.528286][T11970] kmsan_report+0x162/0x2d0 [ 131.532784][T11970] __msan_warning+0x75/0xe0 [ 131.537270][T11970] kmem_cache_free+0x3df/0x2b70 [ 131.542100][T11970] ? kmsan_set_origin+0x6a/0xf0 [ 131.546926][T11970] ? kfree_skb+0x473/0x4c0 [ 131.551321][T11970] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 131.557387][T11970] kfree_skb+0x473/0x4c0 [ 131.561614][T11970] ? packet_rcv_spkt+0x719/0x840 [ 131.566532][T11970] packet_rcv_spkt+0x719/0x840 [ 131.571278][T11970] ? packet_rcv+0x2190/0x2190 [ 131.576021][T11970] dev_queue_xmit_nit+0x1125/0x1200 [ 131.582167][T11970] dev_hard_start_xmit+0x21e/0xab0 [ 131.587268][T11970] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 131.593143][T11970] sch_direct_xmit+0x56c/0x18c0 [ 131.597970][T11970] ? kmsan_set_origin+0x6a/0xf0 [ 131.604512][T11970] __dev_queue_xmit+0x1e53/0x4270 [ 131.609538][T11970] dev_queue_xmit+0x4b/0x60 [ 131.614045][T11970] ip_finish_output2+0x20c6/0x25d0 [ 131.619149][T11970] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 131.625205][T11970] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 131.631176][T11970] __ip_finish_output+0xaf8/0xda0 [ 131.636195][T11970] ip_finish_output+0x2db/0x420 [ 131.641045][T11970] ip_output+0x541/0x610 [ 131.645358][T11970] ? ip_mc_finish_output+0x6d0/0x6d0 [ 131.650653][T11970] ? ip_finish_output+0x420/0x420 [ 131.655772][T11970] __ip_queue_xmit+0x1caf/0x21f0 [ 131.660752][T11970] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 131.667672][T11970] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 131.673723][T11970] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 131.679790][T11970] ip_queue_xmit+0xcc/0xf0 [ 131.684188][T11970] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 131.689860][T11970] __tcp_transmit_skb+0x409e/0x5c60 [ 131.695056][T11970] __tcp_send_ack+0x701/0x840 [ 131.699718][T11970] tcp_send_ack+0x68/0x90 [ 131.704029][T11970] tcp_cleanup_rbuf+0x764/0x800 [ 131.708860][T11970] tcp_recvmsg+0x334d/0x4ff0 [ 131.713451][T11970] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 131.719321][T11970] ? tcp_mmap+0x150/0x150 [ 131.723800][T11970] ? tcp_mmap+0x150/0x150 [ 131.728109][T11970] inet_recvmsg+0x237/0x7d0 [ 131.732596][T11970] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 131.738467][T11970] ? inet_sendpage+0x2c0/0x2c0 [ 131.743230][T11970] ? inet_sendpage+0x2c0/0x2c0 [ 131.747976][T11970] sock_read_iter+0x5be/0x660 [ 131.752699][T11970] ? kernel_sock_ip_overhead+0x340/0x340 [ 131.758310][T11970] __vfs_read+0xa67/0xc90 [ 131.762633][T11970] vfs_read+0x359/0x6f0 [ 131.766774][T11970] ksys_read+0x265/0x430 [ 131.771031][T11970] __se_sys_read+0x92/0xb0 [ 131.775428][T11970] __x64_sys_read+0x4a/0x70 [ 131.779912][T11970] do_syscall_64+0xbc/0xf0 [ 131.784744][T11970] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 131.790704][T11970] RIP: 0033:0x47fd44 [ 131.794595][T11970] 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 [ 131.814269][T11970] RSP: 002b:000000c4204a5710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 131.822741][T11970] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 [ 131.830691][T11970] RDX: 0000000000001000 RSI: 000000c4202a8000 RDI: 0000000000000003 [ 131.838637][T11970] RBP: 000000c4204a5760 R08: 0000000000000000 R09: 0000000000000000 [ 131.846586][T11970] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 131.854535][T11970] R13: 0000000000000004 R14: 0000000000000004 R15: ffffffffffffffff [ 131.862518][T11970] [ 131.864823][T11970] Uninit was stored to memory at: [ 131.869826][T11970] kmsan_internal_chain_origin+0xcc/0x150 [ 131.875518][T11970] __msan_chain_origin+0x6b/0xe0 [ 131.880429][T11970] ___slab_alloc+0x1dbc/0x1fb0 [ 131.885172][T11970] kmem_cache_alloc+0xade/0xd10 [ 131.890002][T11970] skb_clone+0x326/0x5d0 [ 131.894228][T11970] dev_queue_xmit_nit+0x539/0x1200 [ 131.899320][T11970] dev_hard_start_xmit+0x21e/0xab0 [ 131.904409][T11970] sch_direct_xmit+0x56c/0x18c0 [ 131.909248][T11970] __dev_queue_xmit+0x1e53/0x4270 [ 131.914266][T11970] dev_queue_xmit+0x4b/0x60 [ 131.918747][T11970] ip_finish_output2+0x20c6/0x25d0 [ 131.923833][T11970] __ip_finish_output+0xaf8/0xda0 [ 131.928831][T11970] ip_finish_output+0x2db/0x420 [ 131.933653][T11970] ip_output+0x541/0x610 [ 131.937874][T11970] __ip_queue_xmit+0x1caf/0x21f0 [ 131.942784][T11970] ip_queue_xmit+0xcc/0xf0 [ 131.947175][T11970] __tcp_transmit_skb+0x409e/0x5c60 [ 131.952350][T11970] __tcp_send_ack+0x701/0x840 [ 131.957002][T11970] tcp_send_ack+0x68/0x90 [ 131.961306][T11970] tcp_cleanup_rbuf+0x764/0x800 [ 131.966136][T11970] tcp_recvmsg+0x334d/0x4ff0 [ 131.970710][T11970] inet_recvmsg+0x237/0x7d0 [ 131.975187][T11970] sock_read_iter+0x5be/0x660 [ 131.979849][T11970] __vfs_read+0xa67/0xc90 [ 131.984155][T11970] vfs_read+0x359/0x6f0 [ 131.988283][T11970] ksys_read+0x265/0x430 [ 131.992499][T11970] __se_sys_read+0x92/0xb0 [ 131.996890][T11970] __x64_sys_read+0x4a/0x70 [ 132.001366][T11970] do_syscall_64+0xbc/0xf0 [ 132.005773][T11970] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 132.011634][T11970] [ 132.013949][T11970] Uninit was created at: [ 132.018182][T11970] kmsan_internal_poison_shadow+0x58/0xb0 [ 132.023971][T11970] kmsan_slab_free+0x8d/0x100 [ 132.028624][T11970] kmem_cache_free_bulk+0x3ad9/0x3f50 [ 132.034320][T11970] __kfree_skb_flush+0xb0/0x100 [ 132.039150][T11970] net_rx_action+0x1908/0x1950 [ 132.043902][T11970] __do_softirq+0x4a1/0x83a [ 132.048381][T11970] irq_exit+0x230/0x280 [ 132.052508][T11970] do_IRQ+0x20d/0x3a0 [ 132.056467][T11970] ret_from_intr+0x0/0x33 [ 132.060780][T11970] kmsan_slab_free+0xac/0x100 [ 132.065432][T11970] kmem_cache_free+0x2d1/0x2b70 [ 132.070267][T11970] __kfree_skb+0x1dd/0x210 [ 132.074685][T11970] tcp_recvmsg+0x27a6/0x4ff0 [ 132.079265][T11970] inet_recvmsg+0x237/0x7d0 [ 132.083755][T11970] sock_read_iter+0x5be/0x660 [ 132.088425][T11970] __vfs_read+0xa67/0xc90 [ 132.092732][T11970] vfs_read+0x359/0x6f0 [ 132.096867][T11970] ksys_read+0x265/0x430 [ 132.101086][T11970] __se_sys_read+0x92/0xb0 [ 132.105516][T11970] __x64_sys_read+0x4a/0x70 [ 132.110007][T11970] do_syscall_64+0xbc/0xf0 [ 132.114401][T11970] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 132.120261][T11970] ================================================================== [ 132.128382][T11970] Disabling lock debugging due to kernel taint [ 132.134514][T11970] Kernel panic - not syncing: panic_on_warn set ... [ 132.141079][T11970] CPU: 0 PID: 11970 Comm: syz-fuzzer Tainted: G B 5.3.0-rc7+ #0 [ 132.149990][T11970] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 132.160021][T11970] Call Trace: [ 132.163300][T11970] dump_stack+0x191/0x1f0 [ 132.167611][T11970] panic+0x3c9/0xc1e [ 132.171498][T11970] kmsan_report+0x2ca/0x2d0 [ 132.175984][T11970] __msan_warning+0x75/0xe0 [ 132.180486][T11970] kmem_cache_free+0x3df/0x2b70 [ 132.185486][T11970] ? kmsan_set_origin+0x6a/0xf0 [ 132.190575][T11970] ? kfree_skb+0x473/0x4c0 [ 132.194969][T11970] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 132.201021][T11970] kfree_skb+0x473/0x4c0 [ 132.205245][T11970] ? packet_rcv_spkt+0x719/0x840 [ 132.210164][T11970] packet_rcv_spkt+0x719/0x840 [ 132.214910][T11970] ? packet_rcv+0x2190/0x2190 [ 132.219570][T11970] dev_queue_xmit_nit+0x1125/0x1200 [ 132.224765][T11970] dev_hard_start_xmit+0x21e/0xab0 [ 132.229872][T11970] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 132.235767][T11970] sch_direct_xmit+0x56c/0x18c0 [ 132.240602][T11970] ? kmsan_set_origin+0x6a/0xf0 [ 132.245436][T11970] __dev_queue_xmit+0x1e53/0x4270 [ 132.250469][T11970] dev_queue_xmit+0x4b/0x60 [ 132.254954][T11970] ip_finish_output2+0x20c6/0x25d0 [ 132.260042][T11970] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 132.266083][T11970] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 132.272059][T11970] __ip_finish_output+0xaf8/0xda0 [ 132.277067][T11970] ip_finish_output+0x2db/0x420 [ 132.281899][T11970] ip_output+0x541/0x610 [ 132.286130][T11970] ? ip_mc_finish_output+0x6d0/0x6d0 [ 132.291402][T11970] ? ip_finish_output+0x420/0x420 [ 132.296426][T11970] __ip_queue_xmit+0x1caf/0x21f0 [ 132.301343][T11970] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 132.307228][T11970] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 132.313276][T11970] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 132.319327][T11970] ip_queue_xmit+0xcc/0xf0 [ 132.323726][T11970] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 132.329331][T11970] __tcp_transmit_skb+0x409e/0x5c60 [ 132.334543][T11970] __tcp_send_ack+0x701/0x840 [ 132.339204][T11970] tcp_send_ack+0x68/0x90 [ 132.343512][T11970] tcp_cleanup_rbuf+0x764/0x800 [ 132.348350][T11970] tcp_recvmsg+0x334d/0x4ff0 [ 132.352940][T11970] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 132.358807][T11970] ? tcp_mmap+0x150/0x150 [ 132.363119][T11970] ? tcp_mmap+0x150/0x150 [ 132.367434][T11970] inet_recvmsg+0x237/0x7d0 [ 132.371927][T11970] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 132.377796][T11970] ? inet_sendpage+0x2c0/0x2c0 [ 132.382537][T11970] ? inet_sendpage+0x2c0/0x2c0 [ 132.387278][T11970] sock_read_iter+0x5be/0x660 [ 132.391945][T11970] ? kernel_sock_ip_overhead+0x340/0x340 [ 132.397573][T11970] __vfs_read+0xa67/0xc90 [ 132.401922][T11970] vfs_read+0x359/0x6f0 [ 132.406069][T11970] ksys_read+0x265/0x430 [ 132.410303][T11970] __se_sys_read+0x92/0xb0 [ 132.414706][T11970] __x64_sys_read+0x4a/0x70 [ 132.419196][T11970] do_syscall_64+0xbc/0xf0 [ 132.423594][T11970] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 132.429474][T11970] RIP: 0033:0x47fd44 [ 132.433348][T11970] 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 [ 132.452939][T11970] RSP: 002b:000000c4204a5710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 132.461326][T11970] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 [ 132.469276][T11970] RDX: 0000000000001000 RSI: 000000c4202a8000 RDI: 0000000000000003 [ 132.477284][T11970] RBP: 000000c4204a5760 R08: 0000000000000000 R09: 0000000000000000 [ 132.485255][T11970] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 132.493213][T11970] R13: 0000000000000004 R14: 0000000000000004 R15: ffffffffffffffff [ 132.502772][T11970] Kernel Offset: disabled [ 132.507109][T11970] Rebooting in 86400 seconds..