[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 84.326028][ T30] audit: type=1800 audit(1574207882.379:25): pid=11724 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 84.349555][ T30] audit: type=1800 audit(1574207882.399:26): pid=11724 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 84.395789][ T30] audit: type=1800 audit(1574207882.429:27): pid=11724 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 '10.128.10.9' (ECDSA) to the list of known hosts. 2019/11/19 23:58:18 fuzzer started 2019/11/19 23:58:22 dialing manager at 10.128.0.26:46379 2019/11/19 23:58:23 syscalls: 2397 2019/11/19 23:58:23 code coverage: enabled 2019/11/19 23:58:23 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/11/19 23:58:23 extra coverage: enabled 2019/11/19 23:58:23 setuid sandbox: enabled 2019/11/19 23:58:23 namespace sandbox: enabled 2019/11/19 23:58:23 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/19 23:58:23 fault injection: enabled 2019/11/19 23:58:23 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/19 23:58:23 net packet injection: enabled 2019/11/19 23:58:23 net device setup: enabled 2019/11/19 23:58:23 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/11/19 23:58:23 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 139.910754][T11880] ===================================================== [ 139.917790][T11880] BUG: KMSAN: use-after-free in kmem_cache_free+0x3df/0x2b70 [ 139.925172][T11880] CPU: 0 PID: 11880 Comm: syz-fuzzer Not tainted 5.4.0-rc5+ #0 [ 139.932710][T11880] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 139.942768][T11880] Call Trace: [ 139.946072][T11880] dump_stack+0x191/0x1f0 [ 139.950443][T11880] kmsan_report+0x128/0x220 [ 139.954961][T11880] __msan_warning+0x73/0xe0 [ 139.959476][T11880] kmem_cache_free+0x3df/0x2b70 [ 139.964334][T11880] ? kmsan_internal_set_origin+0x6a/0xb0 [ 139.969995][T11880] ? kfree_skb+0x473/0x4c0 [ 139.974423][T11880] ? kmsan_internal_unpoison_shadow+0x42/0x80 [ 139.980571][T11880] kfree_skb+0x473/0x4c0 [ 139.984808][T11880] ? packet_rcv_spkt+0x68d/0x7c0 [ 139.989756][T11880] packet_rcv_spkt+0x68d/0x7c0 [ 139.994522][T11880] ? packet_rcv+0x2110/0x2110 [ 139.999180][T11880] dev_queue_xmit_nit+0x1125/0x1200 [ 140.004374][T11880] dev_hard_start_xmit+0x21e/0xab0 [ 140.009478][T11880] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 140.015373][T11880] sch_direct_xmit+0x56c/0x18c0 [ 140.020254][T11880] __dev_queue_xmit+0x212d/0x4200 [ 140.025310][T11880] dev_queue_xmit+0x4b/0x60 [ 140.029793][T11880] ip_finish_output2+0x20d6/0x25d0 [ 140.034912][T11880] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 140.040961][T11880] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 140.046942][T11880] __ip_finish_output+0xaf8/0xda0 [ 140.052078][T11880] ip_finish_output+0x2db/0x420 [ 140.056927][T11880] ip_output+0x541/0x610 [ 140.061156][T11880] ? ip_mc_finish_output+0x6d0/0x6d0 [ 140.066420][T11880] ? ip_finish_output+0x420/0x420 [ 140.071455][T11880] __ip_queue_xmit+0x1caf/0x21f0 [ 140.076407][T11880] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 140.082336][T11880] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 140.088401][T11880] ip_queue_xmit+0xcc/0xf0 [ 140.092800][T11880] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 140.098414][T11880] __tcp_transmit_skb+0x40e3/0x5d90 [ 140.103613][T11880] __tcp_send_ack+0x701/0x840 [ 140.108280][T11880] tcp_send_ack+0x68/0x90 [ 140.112595][T11880] tcp_cleanup_rbuf+0x764/0x800 [ 140.117435][T11880] tcp_recvmsg+0x334d/0x4ff0 [ 140.122042][T11880] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 140.127921][T11880] ? tcp_mmap+0x150/0x150 [ 140.132243][T11880] ? tcp_mmap+0x150/0x150 [ 140.136601][T11880] inet_recvmsg+0x237/0x7d0 [ 140.141097][T11880] ? inet_sendpage+0x2c0/0x2c0 [ 140.145954][T11880] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 140.151869][T11880] ? inet_sendpage+0x2c0/0x2c0 [ 140.156656][T11880] ? inet_sendpage+0x2c0/0x2c0 [ 140.161424][T11880] sock_read_iter+0x5be/0x660 [ 140.166096][T11880] ? kernel_sock_ip_overhead+0x340/0x340 [ 140.171727][T11880] __vfs_read+0xa67/0xc90 [ 140.176080][T11880] vfs_read+0x359/0x6f0 [ 140.180230][T11880] ksys_read+0x265/0x430 [ 140.184485][T11880] __se_sys_read+0x92/0xb0 [ 140.188893][T11880] __x64_sys_read+0x4a/0x70 [ 140.193385][T11880] do_syscall_64+0xb6/0x160 [ 140.197873][T11880] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 140.203744][T11880] RIP: 0033:0x47fd44 [ 140.207635][T11880] 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 [ 140.227245][T11880] RSP: 002b:000000c4203a3710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 140.235639][T11880] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 [ 140.243603][T11880] RDX: 0000000000001000 RSI: 000000c4203f2000 RDI: 0000000000000003 [ 140.251557][T11880] RBP: 000000c4203a3760 R08: 0000000000000000 R09: 0000000000000000 [ 140.259561][T11880] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000020 [ 140.267528][T11880] R13: 0000000000000020 R14: 0000000000000040 R15: ffffffffffffffff [ 140.275503][T11880] [ 140.277828][T11880] Uninit was stored to memory at: [ 140.282850][T11880] kmsan_internal_chain_origin+0xbd/0x180 [ 140.288561][T11880] __msan_chain_origin+0x6b/0xd0 [ 140.293561][T11880] ___slab_alloc+0x1dbc/0x1fb0 [ 140.298305][T11880] kmem_cache_alloc+0xadf/0xd20 [ 140.303132][T11880] skb_clone+0x326/0x5d0 [ 140.307351][T11880] dev_queue_xmit_nit+0x539/0x1200 [ 140.312531][T11880] dev_hard_start_xmit+0x21e/0xab0 [ 140.317618][T11880] sch_direct_xmit+0x56c/0x18c0 [ 140.322444][T11880] __dev_queue_xmit+0x212d/0x4200 [ 140.327455][T11880] dev_queue_xmit+0x4b/0x60 [ 140.331934][T11880] ip_finish_output2+0x20d6/0x25d0 [ 140.337032][T11880] __ip_finish_output+0xaf8/0xda0 [ 140.342032][T11880] ip_finish_output+0x2db/0x420 [ 140.346872][T11880] ip_output+0x541/0x610 [ 140.351103][T11880] __ip_queue_xmit+0x1caf/0x21f0 [ 140.356017][T11880] ip_queue_xmit+0xcc/0xf0 [ 140.360421][T11880] __tcp_transmit_skb+0x40e3/0x5d90 [ 140.365607][T11880] __tcp_send_ack+0x701/0x840 [ 140.370259][T11880] tcp_send_ack+0x68/0x90 [ 140.374588][T11880] tcp_cleanup_rbuf+0x764/0x800 [ 140.379420][T11880] tcp_recvmsg+0x334d/0x4ff0 [ 140.383987][T11880] inet_recvmsg+0x237/0x7d0 [ 140.388471][T11880] sock_read_iter+0x5be/0x660 [ 140.393144][T11880] __vfs_read+0xa67/0xc90 [ 140.397450][T11880] vfs_read+0x359/0x6f0 [ 140.401580][T11880] ksys_read+0x265/0x430 [ 140.405811][T11880] __se_sys_read+0x92/0xb0 [ 140.410214][T11880] __x64_sys_read+0x4a/0x70 [ 140.414753][T11880] do_syscall_64+0xb6/0x160 [ 140.419256][T11880] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 140.425124][T11880] [ 140.427449][T11880] Uninit was created at: [ 140.431676][T11880] kmsan_internal_poison_shadow+0x60/0x120 [ 140.437477][T11880] kmsan_slab_free+0x8d/0xf0 [ 140.442045][T11880] kmem_cache_free_bulk+0x3ad9/0x3f10 [ 140.447408][T11880] __kfree_skb_flush+0xb0/0x100 [ 140.452249][T11880] net_rx_action+0x1a5e/0x1aa0 [ 140.457002][T11880] __do_softirq+0x4a1/0x83a [ 140.461483][T11880] irq_exit+0x230/0x280 [ 140.465613][T11880] do_IRQ+0x123/0x360 [ 140.469569][T11880] ret_from_intr+0x0/0x33 [ 140.473892][T11880] kmsan_get_shadow_origin_ptr+0x377/0x4b0 [ 140.479676][T11880] __msan_metadata_ptr_for_load_8+0x10/0x20 [ 140.485556][T11880] unwind_next_frame+0x634/0xee0 [ 140.490643][T11880] arch_stack_walk+0x33a/0x3e0 [ 140.495385][T11880] stack_trace_save+0x11c/0x1b0 [ 140.500211][T11880] kmsan_internal_chain_origin+0xbd/0x180 [ 140.505908][T11880] kmsan_memcpy_memmove_metadata+0x25c/0x2e0 [ 140.511863][T11880] kmsan_memcpy_metadata+0xb/0x10 [ 140.516861][T11880] __msan_memcpy+0x56/0x70 [ 140.521253][T11880] sock_read_iter+0x47c/0x660 [ 140.526006][T11880] __vfs_read+0xa67/0xc90 [ 140.530309][T11880] vfs_read+0x359/0x6f0 [ 140.534452][T11880] ksys_read+0x265/0x430 [ 140.538683][T11880] __se_sys_read+0x92/0xb0 [ 140.543073][T11880] __x64_sys_read+0x4a/0x70 [ 140.547552][T11880] do_syscall_64+0xb6/0x160 [ 140.552032][T11880] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 140.557910][T11880] ===================================================== [ 140.564828][T11880] Disabling lock debugging due to kernel taint [ 140.570970][T11880] Kernel panic - not syncing: panic_on_warn set ... [ 140.577550][T11880] CPU: 0 PID: 11880 Comm: syz-fuzzer Tainted: G B 5.4.0-rc5+ #0 [ 140.586453][T11880] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.596485][T11880] Call Trace: [ 140.599776][T11880] dump_stack+0x191/0x1f0 [ 140.604100][T11880] panic+0x3c9/0xc1e [ 140.608005][T11880] kmsan_report+0x215/0x220 [ 140.612490][T11880] __msan_warning+0x73/0xe0 [ 140.616973][T11880] kmem_cache_free+0x3df/0x2b70 [ 140.621802][T11880] ? kmsan_internal_set_origin+0x6a/0xb0 [ 140.627420][T11880] ? kfree_skb+0x473/0x4c0 [ 140.631817][T11880] ? kmsan_internal_unpoison_shadow+0x42/0x80 [ 140.637876][T11880] kfree_skb+0x473/0x4c0 [ 140.642108][T11880] ? packet_rcv_spkt+0x68d/0x7c0 [ 140.647221][T11880] packet_rcv_spkt+0x68d/0x7c0 [ 140.651979][T11880] ? packet_rcv+0x2110/0x2110 [ 140.656635][T11880] dev_queue_xmit_nit+0x1125/0x1200 [ 140.661834][T11880] dev_hard_start_xmit+0x21e/0xab0 [ 140.666927][T11880] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 140.672807][T11880] sch_direct_xmit+0x56c/0x18c0 [ 140.677648][T11880] __dev_queue_xmit+0x212d/0x4200 [ 140.682677][T11880] dev_queue_xmit+0x4b/0x60 [ 140.687166][T11880] ip_finish_output2+0x20d6/0x25d0 [ 140.692275][T11880] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 140.698438][T11880] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 140.704502][T11880] __ip_finish_output+0xaf8/0xda0 [ 140.709584][T11880] ip_finish_output+0x2db/0x420 [ 140.714441][T11880] ip_output+0x541/0x610 [ 140.718674][T11880] ? ip_mc_finish_output+0x6d0/0x6d0 [ 140.723944][T11880] ? ip_finish_output+0x420/0x420 [ 140.728962][T11880] __ip_queue_xmit+0x1caf/0x21f0 [ 140.733889][T11880] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 140.739784][T11880] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 140.745840][T11880] ip_queue_xmit+0xcc/0xf0 [ 140.750238][T11880] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 140.755852][T11880] __tcp_transmit_skb+0x40e3/0x5d90 [ 140.761060][T11880] __tcp_send_ack+0x701/0x840 [ 140.765720][T11880] tcp_send_ack+0x68/0x90 [ 140.770041][T11880] tcp_cleanup_rbuf+0x764/0x800 [ 140.774873][T11880] tcp_recvmsg+0x334d/0x4ff0 [ 140.779478][T11880] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 140.785360][T11880] ? tcp_mmap+0x150/0x150 [ 140.789736][T11880] ? tcp_mmap+0x150/0x150 [ 140.794059][T11880] inet_recvmsg+0x237/0x7d0 [ 140.798554][T11880] ? inet_sendpage+0x2c0/0x2c0 [ 140.803307][T11880] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 140.809202][T11880] ? inet_sendpage+0x2c0/0x2c0 [ 140.813950][T11880] ? inet_sendpage+0x2c0/0x2c0 [ 140.818770][T11880] sock_read_iter+0x5be/0x660 [ 140.823443][T11880] ? kernel_sock_ip_overhead+0x340/0x340 [ 140.829072][T11880] __vfs_read+0xa67/0xc90 [ 140.833410][T11880] vfs_read+0x359/0x6f0 [ 140.837558][T11880] ksys_read+0x265/0x430 [ 140.841802][T11880] __se_sys_read+0x92/0xb0 [ 140.846200][T11880] __x64_sys_read+0x4a/0x70 [ 140.850683][T11880] do_syscall_64+0xb6/0x160 [ 140.855164][T11880] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 140.861033][T11880] RIP: 0033:0x47fd44 [ 140.864906][T11880] 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 [ 140.884488][T11880] RSP: 002b:000000c4203a3710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 140.892890][T11880] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 [ 140.900928][T11880] RDX: 0000000000001000 RSI: 000000c4203f2000 RDI: 0000000000000003 [ 140.908890][T11880] RBP: 000000c4203a3760 R08: 0000000000000000 R09: 0000000000000000 [ 140.916837][T11880] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000020 [ 140.924786][T11880] R13: 0000000000000020 R14: 0000000000000040 R15: ffffffffffffffff [ 140.934206][T11880] Kernel Offset: disabled [ 140.938565][T11880] Rebooting in 86400 seconds..