Warning: Permanently added '10.128.0.80' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.329540] ================================================================== [ 37.337017] BUG: KASAN: slab-out-of-bounds in queue_stack_map_push_elem+0x185/0x290 [ 37.344828] Write of size 262146 at addr ffff8881cce14448 by task syz-executor005/6050 [ 37.352883] [ 37.354502] CPU: 1 PID: 6050 Comm: syz-executor005 Not tainted 4.20.0-rc3+ #348 [ 37.361940] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.371312] Call Trace: [ 37.373897] dump_stack+0x244/0x39d [ 37.377515] ? dump_stack_print_info.cold.1+0x20/0x20 [ 37.382698] ? printk+0xa7/0xcf [ 37.385964] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 37.390716] print_address_description.cold.7+0x9/0x1ff [ 37.396076] kasan_report.cold.8+0x242/0x309 [ 37.400498] ? queue_stack_map_push_elem+0x185/0x290 [ 37.405607] check_memory_region+0x13e/0x1b0 [ 37.410022] memcpy+0x37/0x50 [ 37.413172] queue_stack_map_push_elem+0x185/0x290 [ 37.418093] ? queue_map_pop_elem+0x30/0x30 [ 37.422407] map_update_elem+0x605/0xf60 [ 37.426459] __x64_sys_bpf+0x32d/0x520 [ 37.430338] ? bpf_prog_get+0x20/0x20 [ 37.434140] do_syscall_64+0x1b9/0x820 [ 37.438017] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.443377] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.448301] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.453142] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.458158] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.463173] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.468210] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.473069] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.478264] RIP: 0033:0x4400e9 [ 37.481451] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.500347] RSP: 002b:00007ffc7a0f28d8 EFLAGS: 00000213 ORIG_RAX: 0000000000000141 [ 37.508070] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 37.515336] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002 [ 37.522609] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.529880] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970 [ 37.537147] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 37.544420] [ 37.546037] Allocated by task 6050: [ 37.549658] save_stack+0x43/0xd0 [ 37.553103] kasan_kmalloc+0xc7/0xe0 [ 37.556805] __kmalloc_node+0x50/0x70 [ 37.560596] bpf_map_area_alloc+0x3f/0x90 [ 37.564742] queue_stack_map_alloc+0x192/0x290 [ 37.569310] map_create+0x3bd/0x1110 [ 37.573015] __x64_sys_bpf+0x303/0x520 [ 37.576893] do_syscall_64+0x1b9/0x820 [ 37.580784] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.585970] [ 37.587579] Freed by task 3716: [ 37.590850] save_stack+0x43/0xd0 [ 37.594317] __kasan_slab_free+0x102/0x150 [ 37.598541] kasan_slab_free+0xe/0x10 [ 37.602339] kfree+0xcf/0x230 [ 37.605438] skb_free_head+0x99/0xc0 [ 37.609143] skb_release_data+0x70c/0x9a0 [ 37.613282] skb_release_all+0x4a/0x60 [ 37.617160] consume_skb+0x1ae/0x570 [ 37.620914] skb_free_datagram+0x1a/0xf0 [ 37.624982] unix_dgram_recvmsg+0xd6d/0x1b10 [ 37.629381] sock_recvmsg+0xd0/0x110 [ 37.633088] __sys_recvfrom+0x311/0x5d0 [ 37.637055] __x64_sys_recvfrom+0xe1/0x1a0 [ 37.641285] do_syscall_64+0x1b9/0x820 [ 37.645167] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.650340] [ 37.651959] The buggy address belongs to the object at ffff8881cce14300 [ 37.651959] which belongs to the cache kmalloc-512 of size 512 [ 37.664610] The buggy address is located 328 bytes inside of [ 37.664610] 512-byte region [ffff8881cce14300, ffff8881cce14500) [ 37.676481] The buggy address belongs to the page: [ 37.681408] page:ffffea0007338500 count:1 mapcount:0 mapping:ffff8881da800940 index:0xffff8881cce14580 [ 37.690847] flags: 0x2fffc0000000200(slab) [ 37.695147] raw: 02fffc0000000200 ffffea0006e31bc8 ffffea00071b4608 ffff8881da800940 [ 37.703026] raw: ffff8881cce14580 ffff8881cce14080 0000000100000005 0000000000000000 [ 37.710909] page dumped because: kasan: bad access detected [ 37.716618] [ 37.718242] Memory state around the buggy address: [ 37.723162] ffff8881cce14380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.730518] ffff8881cce14400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.737887] >ffff8881cce14480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.745245] ^ [ 37.748603] ffff8881cce14500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.755958] ffff8881cce14580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.763305] ================================================================== [ 37.770656] Disabling lock debugging due to kernel taint [ 37.776095] Kernel panic - not syncing: panic_on_warn set ... [ 37.781973] CPU: 1 PID: 6050 Comm: syz-executor005 Tainted: G B 4.20.0-rc3+ #348 [ 37.790798] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.800165] Call Trace: [ 37.802756] dump_stack+0x244/0x39d [ 37.806372] ? dump_stack_print_info.cold.1+0x20/0x20 [ 37.811556] panic+0x2ad/0x55c [ 37.814737] ? add_taint.cold.5+0x16/0x16 [ 37.818879] ? add_taint.cold.5+0x5/0x16 [ 37.822943] ? trace_hardirqs_off+0xaf/0x310 [ 37.827344] kasan_end_report+0x47/0x4f [ 37.831309] kasan_report.cold.8+0x76/0x309 [ 37.835643] ? queue_stack_map_push_elem+0x185/0x290 [ 37.840743] check_memory_region+0x13e/0x1b0 [ 37.845176] memcpy+0x37/0x50 [ 37.848274] queue_stack_map_push_elem+0x185/0x290 [ 37.853201] ? queue_map_pop_elem+0x30/0x30 [ 37.857524] map_update_elem+0x605/0xf60 [ 37.861582] __x64_sys_bpf+0x32d/0x520 [ 37.865452] ? bpf_prog_get+0x20/0x20 [ 37.869247] do_syscall_64+0x1b9/0x820 [ 37.873137] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.878513] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.883442] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.888275] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.893301] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.898313] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.903342] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.908178] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.913363] RIP: 0033:0x4400e9 [ 37.916560] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.935453] RSP: 002b:00007ffc7a0f28d8 EFLAGS: 00000213 ORIG_RAX: 0000000000000141 [ 37.943154] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 37.950433] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002 [ 37.957694] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.964955] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970 [ 37.972215] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 37.980483] Kernel Offset: disabled [ 37.984127] Rebooting in 86400 seconds..