Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. 2019/10/27 22:09:31 fuzzer started 2019/10/27 22:09:35 dialing manager at 10.128.0.26:34985 2019/10/27 22:09:36 syscalls: 2424 2019/10/27 22:09:36 code coverage: enabled 2019/10/27 22:09:36 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/10/27 22:09:36 extra coverage: enabled 2019/10/27 22:09:36 setuid sandbox: enabled 2019/10/27 22:09:36 namespace sandbox: enabled 2019/10/27 22:09:36 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/27 22:09:36 fault injection: enabled 2019/10/27 22:09:36 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/27 22:09:36 net packet injection: enabled 2019/10/27 22:09:36 net device setup: enabled 2019/10/27 22:09:36 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist syzkaller login: [ 124.316945][T12500] ===================================================== [ 124.323970][T12500] BUG: KMSAN: use-after-free in kmem_cache_free+0x3df/0x2b70 [ 124.331349][T12500] CPU: 0 PID: 12500 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 124.338889][T12500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 124.349742][T12500] Call Trace: [ 124.353057][T12500] dump_stack+0x191/0x1f0 [ 124.357402][T12500] kmsan_report+0x128/0x220 [ 124.361917][T12500] __msan_warning+0x73/0xe0 [ 124.366461][T12500] kmem_cache_free+0x3df/0x2b70 [ 124.371439][T12500] ? kmsan_internal_set_origin+0x6a/0xb0 [ 124.377092][T12500] ? kfree_skb+0x473/0x4c0 [ 124.381550][T12500] ? kmsan_internal_unpoison_shadow+0x42/0x80 [ 124.387737][T12500] kfree_skb+0x473/0x4c0 [ 124.391982][T12500] ? packet_rcv_spkt+0x68d/0x7c0 [ 124.396930][T12500] packet_rcv_spkt+0x68d/0x7c0 [ 124.401796][T12500] ? packet_rcv+0x2110/0x2110 [ 124.406563][T12500] dev_queue_xmit_nit+0x1125/0x1200 [ 124.411810][T12500] dev_hard_start_xmit+0x21e/0xab0 [ 124.416940][T12500] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 124.422851][T12500] sch_direct_xmit+0x56c/0x18c0 [ 124.427730][T12500] __dev_queue_xmit+0x212d/0x4200 [ 124.433400][T12500] dev_queue_xmit+0x4b/0x60 [ 124.437934][T12500] ip_finish_output2+0x20d6/0x25d0 [ 124.443565][T12500] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 124.449848][T12500] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 124.456022][T12500] __ip_finish_output+0xaf8/0xda0 [ 124.461064][T12500] ip_finish_output+0x2db/0x420 [ 124.465915][T12500] ip_output+0x541/0x610 [ 124.470155][T12500] ? ip_mc_finish_output+0x6d0/0x6d0 [ 124.475435][T12500] ? ip_finish_output+0x420/0x420 [ 124.481307][T12500] __ip_queue_xmit+0x1caf/0x21f0 [ 124.486228][T12500] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 124.492124][T12500] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 124.498177][T12500] ? should_fail+0x1d2/0xa50 [ 124.502769][T12500] ip_queue_xmit+0xcc/0xf0 [ 124.507170][T12500] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 124.512930][T12500] __tcp_transmit_skb+0x40e3/0x5d90 [ 124.518149][T12500] __tcp_send_ack+0x701/0x840 [ 124.522818][T12500] tcp_send_ack+0x68/0x90 [ 124.527146][T12500] tcp_cleanup_rbuf+0x764/0x800 [ 124.531998][T12500] tcp_recvmsg+0x334d/0x4ff0 [ 124.536624][T12500] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 124.542551][T12500] ? tcp_mmap+0x150/0x150 [ 124.546863][T12500] ? tcp_mmap+0x150/0x150 [ 124.551169][T12500] inet_recvmsg+0x237/0x7d0 [ 124.555657][T12500] ? inet_sendpage+0x2c0/0x2c0 [ 124.560526][T12500] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 124.566405][T12500] ? inet_sendpage+0x2c0/0x2c0 [ 124.571151][T12500] ? inet_sendpage+0x2c0/0x2c0 [ 124.575893][T12500] sock_read_iter+0x5be/0x660 [ 124.580558][T12500] ? kernel_sock_ip_overhead+0x340/0x340 [ 124.586169][T12500] __vfs_read+0xa67/0xc90 [ 124.590631][T12500] vfs_read+0x359/0x6f0 [ 124.594904][T12500] ksys_read+0x265/0x430 [ 124.599170][T12500] __se_sys_read+0x92/0xb0 [ 124.603590][T12500] __x64_sys_read+0x4a/0x70 [ 124.608133][T12500] do_syscall_64+0xb6/0x160 [ 124.612654][T12500] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 124.618547][T12500] RIP: 0033:0x47fd44 [ 124.622452][T12500] 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 [ 124.642251][T12500] RSP: 002b:000000c42039d710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 124.650678][T12500] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 [ 124.658740][T12500] RDX: 0000000000001000 RSI: 000000c4203d8000 RDI: 0000000000000003 [ 124.666706][T12500] RBP: 000000c42039d760 R08: 0000000000000000 R09: 0000000000000000 [ 124.674836][T12500] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 [ 124.682809][T12500] R13: 0000000000000008 R14: 0000000000000004 R15: ffffffffffffffff [ 124.690795][T12500] [ 124.693115][T12500] Uninit was stored to memory at: [ 124.698138][T12500] kmsan_internal_chain_origin+0xbd/0x180 [ 124.703840][T12500] __msan_chain_origin+0x6b/0xd0 [ 124.708757][T12500] ___slab_alloc+0x1dbc/0x1fb0 [ 124.713506][T12500] kmem_cache_alloc+0xade/0xd10 [ 124.718501][T12500] skb_clone+0x326/0x5d0 [ 124.722730][T12500] dev_queue_xmit_nit+0x539/0x1200 [ 124.727845][T12500] dev_hard_start_xmit+0x21e/0xab0 [ 124.732960][T12500] sch_direct_xmit+0x56c/0x18c0 [ 124.737800][T12500] __dev_queue_xmit+0x212d/0x4200 [ 124.742826][T12500] dev_queue_xmit+0x4b/0x60 [ 124.747334][T12500] ip_finish_output2+0x20d6/0x25d0 [ 124.752521][T12500] __ip_finish_output+0xaf8/0xda0 [ 124.757524][T12500] ip_finish_output+0x2db/0x420 [ 124.762351][T12500] ip_output+0x541/0x610 [ 124.766571][T12500] __ip_queue_xmit+0x1caf/0x21f0 [ 124.771521][T12500] ip_queue_xmit+0xcc/0xf0 [ 124.775917][T12500] __tcp_transmit_skb+0x40e3/0x5d90 [ 124.781113][T12500] __tcp_send_ack+0x701/0x840 [ 124.785770][T12500] tcp_send_ack+0x68/0x90 [ 124.790099][T12500] tcp_cleanup_rbuf+0x764/0x800 [ 124.794939][T12500] tcp_recvmsg+0x334d/0x4ff0 [ 124.799504][T12500] inet_recvmsg+0x237/0x7d0 [ 124.804005][T12500] sock_read_iter+0x5be/0x660 [ 124.808686][T12500] __vfs_read+0xa67/0xc90 [ 124.813002][T12500] vfs_read+0x359/0x6f0 [ 124.817142][T12500] ksys_read+0x265/0x430 [ 124.821367][T12500] __se_sys_read+0x92/0xb0 [ 124.825829][T12500] __x64_sys_read+0x4a/0x70 [ 124.830320][T12500] do_syscall_64+0xb6/0x160 [ 124.834923][T12500] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 124.840909][T12500] [ 124.843222][T12500] Uninit was created at: [ 124.847620][T12500] kmsan_internal_poison_shadow+0x60/0x120 [ 124.853442][T12500] kmsan_slab_free+0x8d/0xf0 [ 124.858018][T12500] kmem_cache_free_bulk+0x3ad9/0x3f10 [ 124.863376][T12500] __kfree_skb_flush+0xb0/0x100 [ 124.868207][T12500] net_rx_action+0x1a5e/0x1aa0 [ 124.872963][T12500] __do_softirq+0x4a1/0x83a [ 124.877471][T12500] irq_exit+0x230/0x280 [ 124.881614][T12500] do_IRQ+0x123/0x360 [ 124.885579][T12500] ret_from_intr+0x0/0x33 [ 124.889889][T12500] kmsan_slab_alloc+0xd5/0x120 [ 124.894628][T12500] kmem_cache_alloc_node+0x8f8/0xe70 [ 124.899891][T12500] __alloc_skb+0x215/0xa10 [ 124.904287][T12500] __tcp_send_ack+0xfb/0x840 [ 124.908854][T12500] tcp_send_ack+0x68/0x90 [ 124.913160][T12500] tcp_cleanup_rbuf+0x764/0x800 [ 124.917984][T12500] tcp_recvmsg+0x334d/0x4ff0 [ 124.922548][T12500] inet_recvmsg+0x237/0x7d0 [ 124.927030][T12500] sock_read_iter+0x5be/0x660 [ 124.931681][T12500] __vfs_read+0xa67/0xc90 [ 124.935984][T12500] vfs_read+0x359/0x6f0 [ 124.940111][T12500] ksys_read+0x265/0x430 [ 124.944328][T12500] __se_sys_read+0x92/0xb0 [ 124.948718][T12500] __x64_sys_read+0x4a/0x70 [ 124.953222][T12500] do_syscall_64+0xb6/0x160 [ 124.957713][T12500] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 124.963579][T12500] ===================================================== [ 124.970487][T12500] Disabling lock debugging due to kernel taint [ 124.976612][T12500] Kernel panic - not syncing: panic_on_warn set ... [ 124.983225][T12500] CPU: 0 PID: 12500 Comm: syz-fuzzer Tainted: G B 5.4.0-rc3+ #0 [ 124.992178][T12500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 125.002222][T12500] Call Trace: [ 125.005500][T12500] dump_stack+0x191/0x1f0 [ 125.009832][T12500] panic+0x3c9/0xc1e [ 125.013750][T12500] kmsan_report+0x215/0x220 [ 125.019467][T12500] __msan_warning+0x73/0xe0 [ 125.024001][T12500] kmem_cache_free+0x3df/0x2b70 [ 125.028837][T12500] ? kmsan_internal_set_origin+0x6a/0xb0 [ 125.034452][T12500] ? kfree_skb+0x473/0x4c0 [ 125.038849][T12500] ? kmsan_internal_unpoison_shadow+0x42/0x80 [ 125.044907][T12500] kfree_skb+0x473/0x4c0 [ 125.049137][T12500] ? packet_rcv_spkt+0x68d/0x7c0 [ 125.054088][T12500] packet_rcv_spkt+0x68d/0x7c0 [ 125.058851][T12500] ? packet_rcv+0x2110/0x2110 [ 125.063519][T12500] dev_queue_xmit_nit+0x1125/0x1200 [ 125.068707][T12500] dev_hard_start_xmit+0x21e/0xab0 [ 125.073892][T12500] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 125.079773][T12500] sch_direct_xmit+0x56c/0x18c0 [ 125.084714][T12500] __dev_queue_xmit+0x212d/0x4200 [ 125.089826][T12500] dev_queue_xmit+0x4b/0x60 [ 125.094312][T12500] ip_finish_output2+0x20d6/0x25d0 [ 125.099402][T12500] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 125.105450][T12500] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 125.111456][T12500] __ip_finish_output+0xaf8/0xda0 [ 125.116488][T12500] ip_finish_output+0x2db/0x420 [ 125.121351][T12500] ip_output+0x541/0x610 [ 125.125683][T12500] ? ip_mc_finish_output+0x6d0/0x6d0 [ 125.130971][T12500] ? ip_finish_output+0x420/0x420 [ 125.136684][T12500] __ip_queue_xmit+0x1caf/0x21f0 [ 125.141607][T12500] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 125.147492][T12500] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 125.153682][T12500] ? should_fail+0x1d2/0xa50 [ 125.158331][T12500] ip_queue_xmit+0xcc/0xf0 [ 125.163268][T12500] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 125.169582][T12500] __tcp_transmit_skb+0x40e3/0x5d90 [ 125.174780][T12500] __tcp_send_ack+0x701/0x840 [ 125.179965][T12500] tcp_send_ack+0x68/0x90 [ 125.184298][T12500] tcp_cleanup_rbuf+0x764/0x800 [ 125.189214][T12500] tcp_recvmsg+0x334d/0x4ff0 [ 125.193889][T12500] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 125.199914][T12500] ? tcp_mmap+0x150/0x150 [ 125.204248][T12500] ? tcp_mmap+0x150/0x150 [ 125.208587][T12500] inet_recvmsg+0x237/0x7d0 [ 125.213078][T12500] ? inet_sendpage+0x2c0/0x2c0 [ 125.217926][T12500] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 125.224062][T12500] ? inet_sendpage+0x2c0/0x2c0 [ 125.228817][T12500] ? inet_sendpage+0x2c0/0x2c0 [ 125.233586][T12500] sock_read_iter+0x5be/0x660 [ 125.238410][T12500] ? kernel_sock_ip_overhead+0x340/0x340 [ 125.244297][T12500] __vfs_read+0xa67/0xc90 [ 125.248720][T12500] vfs_read+0x359/0x6f0 [ 125.252870][T12500] ksys_read+0x265/0x430 [ 125.257564][T12500] __se_sys_read+0x92/0xb0 [ 125.261970][T12500] __x64_sys_read+0x4a/0x70 [ 125.266554][T12500] do_syscall_64+0xb6/0x160 [ 125.271053][T12500] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 125.276932][T12500] RIP: 0033:0x47fd44 [ 125.280818][T12500] 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 [ 125.300551][T12500] RSP: 002b:000000c42039d710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 125.309142][T12500] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 [ 125.317117][T12500] RDX: 0000000000001000 RSI: 000000c4203d8000 RDI: 0000000000000003 [ 125.325087][T12500] RBP: 000000c42039d760 R08: 0000000000000000 R09: 0000000000000000 [ 125.333521][T12500] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 [ 125.341501][T12500] R13: 0000000000000008 R14: 0000000000000004 R15: ffffffffffffffff [ 125.350954][T12500] Kernel Offset: disabled [ 125.355290][T12500] Rebooting in 86400 seconds..