2017/09/11 23:54:29 parsed 1 programs 2017/09/11 23:54:29 executed programs: 0 2017/09/11 23:54:34 executed programs: 75 syzkaller login: [ 32.591953] dev_remove_pack: ffff88006b6d5b40 not found [ 32.635459] ================================================================== [ 32.636501] BUG: KASAN: use-after-free in __list_add_valid+0xb1/0xd0 [ 32.637360] Read of size 8 at addr ffff88006b2e3470 by task syz-executor0/3235 [ 32.638297] [ 32.638487] CPU: 3 PID: 3235 Comm: syz-executor0 Not tainted 4.13.0-next-20170911+ #1 [ 32.640640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 32.641545] Call Trace: [ 32.641843] dump_stack+0x194/0x257 [ 32.642258] ? arch_local_irq_restore+0x53/0x53 [ 32.642804] ? show_regs_print_info+0x65/0x65 [ 32.643459] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.644023] ? __list_add_valid+0xb1/0xd0 [ 32.644524] print_address_description+0x73/0x250 [ 32.645094] ? __list_add_valid+0xb1/0xd0 [ 32.645699] kasan_report+0x24e/0x340 [ 32.646238] __asan_report_load8_noabort+0x14/0x20 [ 32.646795] __list_add_valid+0xb1/0xd0 [ 32.647330] dev_add_pack+0x113/0x2b0 [ 32.647709] ? napi_skb_free_stolen_head+0x170/0x170 [ 32.648510] ? __lockdep_init_map+0xe4/0x650 [ 32.649378] ? lockdep_init_map+0x3d/0x70 [ 32.650186] register_prot_hook.part.49+0x95/0xb0 [ 32.651139] packet_create+0x820/0xb00 [ 32.651881] ? sock_destroy_inode+0x70/0x70 [ 32.652707] ? register_prot_hook.part.49+0xb0/0xb0 [ 32.653678] ? __sock_create+0x211/0x850 [ 32.654327] ? module_unload_free+0x5b0/0x5b0 [ 32.655148] ? lock_release+0xd70/0xd70 [ 32.655918] ? __lock_is_held+0xbc/0x140 [ 32.656720] __sock_create+0x4d4/0x850 [ 32.661894] ? ___sys_recvmsg+0x630/0x630 [ 32.662452] ? __fdget+0x18/0x20 [ 32.663160] ? SyS_futex+0x260/0x390 [ 32.663508] ? SyS_futex+0x269/0x390 [ 32.663987] ? SyS_getsockopt+0x1dd/0x340 [ 32.664444] SyS_socket+0xeb/0x200 [ 32.664840] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 32.665339] ? move_addr_to_kernel+0x60/0x60 [ 32.665776] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.666322] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.666842] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 32.667354] RIP: 0033:0x447299 [ 32.667650] RSP: 002b:00007f88e7f78c08 EFLAGS: 00000286 ORIG_RAX: 0000000000000029 [ 32.668440] RAX: ffffffffffffffda RBX: 0000000000000011 RCX: 0000000000447299 [ 32.669218] RDX: 0000000000000300 RSI: 0000000000000802 RDI: 0000000000000011 [ 32.669950] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 32.670980] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000ffffffff [ 32.671794] R13: 00000000000014d0 R14: 00000000006e4590 R15: 0000000000000000 [ 32.672663] [ 32.672858] Allocated by task 3232: [ 32.673369] save_stack_trace+0x16/0x20 [ 32.673912] save_stack+0x43/0xd0 [ 32.674414] kasan_kmalloc+0xad/0xe0 [ 32.675075] kmem_cache_alloc_trace+0x136/0x750 [ 32.675508] fanout_add+0xa50/0x1190 [ 32.675794] packet_setsockopt+0xfdc/0x1e80 [ 32.676129] SyS_setsockopt+0x189/0x360 [ 32.676412] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 32.676763] [ 32.676913] Freed by task 3232: [ 32.677309] save_stack_trace+0x16/0x20 [ 32.677819] save_stack+0x43/0xd0 [ 32.678292] kasan_slab_free+0x71/0xc0 [ 32.678856] kfree+0xca/0x250 [ 32.679364] packet_release+0xa8f/0xd70 [ 32.680032] sock_release+0x8d/0x1e0 [ 32.680438] sock_close+0x16/0x20 [ 32.680814] __fput+0x333/0x7f0 [ 32.682867] ____fput+0x15/0x20 [ 32.683494] task_work_run+0x199/0x270 [ 32.684210] do_exit+0xa52/0x1b40 [ 32.684816] do_group_exit+0x149/0x400 [ 32.685556] get_signal+0x7e8/0x17e0 [ 32.686009] do_signal+0x94/0x1ee0 [ 32.686405] exit_to_usermode_loop+0x224/0x300 [ 32.686822] syscall_return_slowpath+0x42f/0x500 [ 32.687421] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 32.687852] [ 32.688015] The buggy address belongs to the object at ffff88006b2e2bc0 [ 32.688015] which belongs to the cache kmalloc-4096 of size 4096 [ 32.689527] The buggy address is located 2224 bytes inside of [ 32.689527] 4096-byte region [ffff88006b2e2bc0, ffff88006b2e3bc0) [ 32.691105] The buggy address belongs to the page: [ 32.691577] page:ffffea0001acb880 count:1 mapcount:0 mapping:ffff88006b2e2bc0 index:0x0 compound_mapcount: 0 [ 32.692563] flags: 0x500000000008100(slab|head) [ 32.693070] raw: 0500000000008100 ffff88006b2e2bc0 0000000000000000 0000000100000001 [ 32.693823] raw: ffffea0001a29320 ffff88006d800a50 ffff88003e800dc0 0000000000000000 [ 32.694608] page dumped because: kasan: bad access detected [ 32.695176] [ 32.695343] Memory state around the buggy address: [ 32.695789] ffff88006b2e3300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.696534] ffff88006b2e3380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.697286] >ffff88006b2e3400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.697963] ^ [ 32.698670] ffff88006b2e3480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.699371] ffff88006b2e3500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.700090] ================================================================== [ 32.700783] Disabling lock debugging due to kernel taint [ 32.701774] Kernel panic - not syncing: panic_on_warn set ... [ 32.701774] [ 32.703599] CPU: 3 PID: 3235 Comm: syz-executor0 Tainted: G B 4.13.0-next-20170911+ #1 [ 32.704438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 32.705212] Call Trace: [ 32.705468] dump_stack+0x194/0x257 [ 32.705798] ? arch_local_irq_restore+0x53/0x53 [ 32.706240] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.706672] ? assoc_array_gc+0x13a0/0x13c0 [ 32.707084] panic+0x1e4/0x417 [ 32.707376] ? __warn+0x1d9/0x1d9 [ 32.707694] ? __list_add_valid+0xb1/0xd0 [ 32.708090] kasan_end_report+0x50/0x50 [ 32.708454] kasan_report+0x137/0x340 [ 32.708802] __asan_report_load8_noabort+0x14/0x20 [ 32.709163] __list_add_valid+0xb1/0xd0 [ 32.709451] dev_add_pack+0x113/0x2b0 [ 32.709713] ? napi_skb_free_stolen_head+0x170/0x170 [ 32.710091] ? __lockdep_init_map+0xe4/0x650 [ 32.710410] ? lockdep_init_map+0x3d/0x70 [ 32.710699] register_prot_hook.part.49+0x95/0xb0 [ 32.711061] packet_create+0x820/0xb00 [ 32.711347] ? sock_destroy_inode+0x70/0x70 [ 32.711693] ? register_prot_hook.part.49+0xb0/0xb0 [ 32.712202] ? __sock_create+0x211/0x850 [ 32.712572] ? module_unload_free+0x5b0/0x5b0 [ 32.713011] ? lock_release+0xd70/0xd70 [ 32.713376] ? __lock_is_held+0xbc/0x140 [ 32.713747] __sock_create+0x4d4/0x850 [ 32.714117] ? ___sys_recvmsg+0x630/0x630 [ 32.714492] ? __fdget+0x18/0x20 [ 32.714797] ? SyS_futex+0x260/0x390 [ 32.715150] ? SyS_futex+0x269/0x390 [ 32.715485] ? SyS_getsockopt+0x1dd/0x340 [ 32.715859] SyS_socket+0xeb/0x200 [ 32.716210] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 32.716649] ? move_addr_to_kernel+0x60/0x60 [ 32.717053] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.717504] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.717934] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 32.718360] RIP: 0033:0x447299 [ 32.718647] RSP: 002b:00007f88e7f78c08 EFLAGS: 00000286 ORIG_RAX: 0000000000000029 [ 32.719334] RAX: ffffffffffffffda RBX: 0000000000000011 RCX: 0000000000447299 [ 32.719979] RDX: 0000000000000300 RSI: 0000000000000802 RDI: 0000000000000011 [ 32.720633] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 32.721361] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000ffffffff [ 32.722087] R13: 00000000000014d0 R14: 00000000006e4590 R15: 0000000000000000 [ 32.722897] Dumping ftrace buffer: [ 32.723264] (ftrace buffer empty) [ 32.723651] Kernel Offset: disabled [ 32.724491] Rebooting in 86400 seconds..