2017/09/04 19:50:05 parsed 1 programs 2017/09/04 19:50:05 executed programs: 0 syzkaller login: [ 31.132407] dev_remove_pack: ffff88006c72b300 not found [ 31.189127] ================================================================== [ 31.189721] BUG: KASAN: use-after-free in __list_add_valid+0xb1/0xd0 [ 31.190238] Read of size 8 at addr ffff88006c95d330 by task syz-executor0/2999 [ 31.190760] [ 31.190879] CPU: 2 PID: 2999 Comm: syz-executor0 Not tainted 4.13.0-next-20170904+ #14 [ 31.191489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 31.192076] Call Trace: [ 31.192276] dump_stack+0x194/0x257 [ 31.192534] ? arch_local_irq_restore+0x53/0x53 [ 31.192858] ? show_regs_print_info+0x65/0x65 [ 31.193189] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.193556] ? __list_add_valid+0xb1/0xd0 [ 31.193850] print_address_description+0x73/0x250 [ 31.194212] ? __list_add_valid+0xb1/0xd0 [ 31.194624] kasan_report+0x24e/0x340 [ 31.194893] __asan_report_load8_noabort+0x14/0x20 [ 31.195282] __list_add_valid+0xb1/0xd0 [ 31.195564] dev_add_pack+0x113/0x2b0 [ 31.195833] ? napi_skb_free_stolen_head+0x170/0x170 [ 31.196213] ? __lockdep_init_map+0xe4/0x650 [ 31.196544] ? lockdep_init_map+0x3d/0x70 [ 31.196839] register_prot_hook.part.49+0x95/0xb0 [ 31.197202] packet_create+0x820/0xb00 [ 31.197491] ? sock_destroy_inode+0x70/0x70 [ 31.197796] ? register_prot_hook.part.49+0xb0/0xb0 [ 31.198173] ? __sock_create+0x211/0x850 [ 31.198563] ? module_unload_free+0x5b0/0x5b0 [ 31.198985] ? lock_release+0xd70/0xd70 [ 31.199376] ? __lock_is_held+0xbc/0x140 [ 31.199749] __sock_create+0x4d4/0x850 [ 31.200034] ? ___sys_recvmsg+0x630/0x630 [ 31.200405] ? __fdget+0x18/0x20 [ 31.200679] ? SyS_futex+0x260/0x390 [ 31.201019] ? SyS_futex+0x269/0x390 [ 31.201361] ? SyS_setsockopt+0x215/0x360 [ 31.201743] SyS_socket+0xeb/0x200 [ 31.202067] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 31.202509] ? move_addr_to_kernel+0x60/0x60 [ 31.202911] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.203413] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.203850] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.204276] RIP: 0033:0x447299 [ 31.204570] RSP: 002b:00007f5c154cdc08 EFLAGS: 00000286 ORIG_RAX: 0000000000000029 [ 31.205269] RAX: ffffffffffffffda RBX: 0000000000000011 RCX: 0000000000447299 [ 31.205885] RDX: 0000000000000008 RSI: 0000000000080003 RDI: 0000000000000011 [ 31.206541] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 31.207183] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000 [ 31.207804] R13: 0000000000000000 R14: 00007f5c154ce9c0 R15: 00007f5c154ce700 [ 31.208492] [ 31.208633] Allocated by task 2996: [ 31.208900] save_stack_trace+0x16/0x20 [ 31.209236] save_stack+0x43/0xd0 [ 31.210225] kasan_kmalloc+0xad/0xe0 [ 31.210518] kmem_cache_alloc_trace+0x136/0x750 [ 31.210868] fanout_add+0xa50/0x1190 [ 31.211135] packet_setsockopt+0xfdc/0x1e80 [ 31.211542] SyS_setsockopt+0x189/0x360 [ 31.211939] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.212447] [ 31.212623] Freed by task 2996: [ 31.213008] save_stack_trace+0x16/0x20 [ 31.213783] save_stack+0x43/0xd0 [ 31.214255] kasan_slab_free+0x71/0xc0 [ 31.214603] kfree+0xca/0x250 [ 31.214897] packet_release+0xa8f/0xd70 [ 31.215303] sock_release+0x8d/0x1e0 [ 31.215615] sock_close+0x16/0x20 [ 31.215829] __fput+0x333/0x7f0 [ 31.216037] ____fput+0x15/0x20 [ 31.216232] task_work_run+0x199/0x270 [ 31.216474] do_exit+0xa52/0x1b40 [ 31.216695] do_group_exit+0x149/0x400 [ 31.216927] get_signal+0x7e8/0x17e0 [ 31.217146] do_signal+0x94/0x1ee0 [ 31.217356] exit_to_usermode_loop+0x224/0x300 [ 31.217638] syscall_return_slowpath+0x42f/0x500 [ 31.217917] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 31.218193] [ 31.218293] The buggy address belongs to the object at ffff88006c95ca80 [ 31.218293] which belongs to the cache kmalloc-4096 of size 4096 [ 31.219047] The buggy address is located 2224 bytes inside of [ 31.219047] 4096-byte region [ffff88006c95ca80, ffff88006c95da80) [ 31.219925] The buggy address belongs to the page: [ 31.220262] page:ffffea0001b25700 count:1 mapcount:0 mapping:ffff88006c95ca80 index:0x0 compound_mapcount: 0 [ 31.221233] flags: 0x500000000008100(slab|head) [ 31.221666] raw: 0500000000008100 ffff88006c95ca80 0000000000000000 0000000100000001 [ 31.222382] raw: ffffea0001a620a0 ffff88006d800a50 ffff88003e800dc0 0000000000000000 [ 31.223167] page dumped because: kasan: bad access detected [ 31.223812] [ 31.223973] Memory state around the buggy address: [ 31.224412] ffff88006c95d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.225172] ffff88006c95d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.225755] >ffff88006c95d300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.226441] ^ [ 31.226784] ffff88006c95d380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.227347] ffff88006c95d400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.227874] ================================================================== [ 31.228487] Disabling lock debugging due to kernel taint [ 31.229022] Kernel panic - not syncing: panic_on_warn set ... [ 31.229022] [ 31.229755] CPU: 2 PID: 2999 Comm: syz-executor0 Tainted: G B 4.13.0-next-20170904+ #14 [ 31.230675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 31.231887] Call Trace: [ 31.232081] dump_stack+0x194/0x257 [ 31.232409] ? arch_local_irq_restore+0x53/0x53 [ 31.232731] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.233060] ? __list_add_valid+0x40/0xd0 [ 31.233373] panic+0x1e4/0x417 [ 31.233597] ? __warn+0x1d9/0x1d9 [ 31.233841] ? __list_add_valid+0xb1/0xd0 [ 31.234155] kasan_end_report+0x50/0x50 [ 31.234482] kasan_report+0x137/0x340 [ 31.234745] __asan_report_load8_noabort+0x14/0x20 [ 31.235086] __list_add_valid+0xb1/0xd0 [ 31.235453] dev_add_pack+0x113/0x2b0 [ 31.235791] ? napi_skb_free_stolen_head+0x170/0x170 [ 31.236241] ? __lockdep_init_map+0xe4/0x650 [ 31.236734] ? lockdep_init_map+0x3d/0x70 [ 31.237160] register_prot_hook.part.49+0x95/0xb0 [ 31.237611] packet_create+0x820/0xb00 [ 31.237960] ? sock_destroy_inode+0x70/0x70 [ 31.238371] ? register_prot_hook.part.49+0xb0/0xb0 [ 31.238866] ? __sock_create+0x211/0x850 [ 31.239273] ? module_unload_free+0x5b0/0x5b0 [ 31.239673] ? lock_release+0xd70/0xd70 [ 31.240031] ? __lock_is_held+0xbc/0x140 [ 31.240424] __sock_create+0x4d4/0x850 [ 31.240721] ? ___sys_recvmsg+0x630/0x630 [ 31.241022] ? __fdget+0x18/0x20 [ 31.241284] ? SyS_futex+0x260/0x390 [ 31.241594] ? SyS_futex+0x269/0x390 [ 31.241864] ? SyS_setsockopt+0x215/0x360 [ 31.242167] SyS_socket+0xeb/0x200 [ 31.242453] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 31.242854] ? move_addr_to_kernel+0x60/0x60 [ 31.243185] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.243528] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.243857] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 31.244183] RIP: 0033:0x447299 [ 31.244403] RSP: 002b:00007f5c154cdc08 EFLAGS: 00000286 ORIG_RAX: 0000000000000029 [ 31.244956] RAX: ffffffffffffffda RBX: 0000000000000011 RCX: 0000000000447299 [ 31.245447] RDX: 0000000000000008 RSI: 0000000000080003 RDI: 0000000000000011 [ 31.245982] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 31.246557] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000 [ 31.247131] R13: 0000000000000000 R14: 00007f5c154ce9c0 R15: 00007f5c154ce700 [ 31.247808] Dumping ftrace buffer: [ 31.248052] (ftrace buffer empty) [ 31.248308] Kernel Offset: disabled [ 31.248561] Rebooting in 86400 seconds..