2017/09/07 06:17:01 parsed 1 programs 2017/09/07 06:17:01 executed programs: 0 syzkaller login: [ 45.092329] dev_remove_pack: ffff880069d31600 not found [ 45.114215] ================================================================== [ 45.114918] BUG: KASAN: use-after-free in __dev_remove_pack+0x305/0x3b0 [ 45.115379] Read of size 8 at addr ffff88006a322da8 by task syz-executor0/3042 [ 45.116015] [ 45.116169] CPU: 0 PID: 3042 Comm: syz-executor0 Not tainted 4.13.0-next-20170906+ #16 [ 45.116900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 45.117636] Call Trace: [ 45.117876] dump_stack+0x194/0x257 [ 45.118211] ? arch_local_irq_restore+0x53/0x53 [ 45.118634] ? show_regs_print_info+0x65/0x65 [ 45.119045] ? __dev_remove_pack+0x305/0x3b0 [ 45.119445] print_address_description+0x73/0x250 [ 45.119885] ? __dev_remove_pack+0x305/0x3b0 [ 45.120286] kasan_report+0x24e/0x340 [ 45.120634] __asan_report_load8_noabort+0x14/0x20 [ 45.121085] __dev_remove_pack+0x305/0x3b0 [ 45.121470] ? dev_get_by_name_rcu+0x270/0x270 [ 45.121785] ? refcount_sub_and_test+0x115/0x1b0 [ 45.122121] __unregister_prot_hook+0x211/0x280 [ 45.122451] packet_release+0x8bb/0xd70 [ 45.122732] ? packet_set_ring+0x1b70/0x1b70 [ 45.123039] ? dentry_free+0xcd/0x130 [ 45.123304] ? rcu_read_lock_sched_held+0x108/0x120 [ 45.123650] ? kmem_cache_free+0x249/0x280 [ 45.123945] ? dentry_free+0xd2/0x130 [ 45.124210] ? locks_remove_file+0x3fa/0x5a0 [ 45.124516] ? fcntl_setlk+0x10d0/0x10d0 [ 45.124801] ? __fsnotify_parent+0xb4/0x3a0 [ 45.125103] ? fsnotify+0x1af0/0x1af0 [ 45.125371] sock_release+0x8d/0x1e0 [ 45.125628] ? sock_release+0x8d/0x1e0 [ 45.125899] ? sock_release+0x1e0/0x1e0 [ 45.126174] sock_close+0x16/0x20 [ 45.126414] __fput+0x333/0x7f0 [ 45.126650] ? fput+0x140/0x140 [ 45.126881] ? check_same_owner+0x320/0x320 [ 45.127179] ? _raw_spin_unlock_irq+0x27/0x70 [ 45.127491] ____fput+0x15/0x20 [ 45.127722] task_work_run+0x199/0x270 [ 45.127995] ? task_work_cancel+0x210/0x210 [ 45.128294] ? _raw_spin_unlock+0x22/0x30 [ 45.128580] ? switch_task_namespaces+0x87/0xc0 [ 45.128989] do_exit+0xa52/0x1b40 [ 45.129271] ? do_raw_spin_trylock+0x190/0x190 [ 45.129647] ? SyS_setgroups+0x250/0x250 [ 45.129979] ? mm_update_next_owner+0x930/0x930 [ 45.130339] ? sched_clock+0x31/0x40 [ 45.130617] ? trace_hardirqs_off+0xd/0x10 [ 45.130951] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 45.131774] ? try_to_wake_up+0x115/0x1850 [ 45.132156] ? find_held_lock+0x39/0x1d0 [ 45.132442] ? check_noncircular+0x20/0x20 [ 45.132835] ? migrate_swap_stop+0x970/0x970 [ 45.133201] ? do_nanosleep+0x508/0x6f0 [ 45.133542] ? schedule_timeout_idle+0x90/0x90 [ 45.133915] ? find_held_lock+0x39/0x1d0 [ 45.134249] ? lock_downgrade+0x990/0x990 [ 45.134621] ? do_group_exit+0x1fe/0x400 [ 45.134973] ? nanosleep_copyout+0x100/0x100 [ 45.135315] ? do_raw_spin_trylock+0x190/0x190 [ 45.135680] ? signal_wake_up_state+0x3a/0x40 [ 45.136044] ? zap_other_threads+0x1ca/0x240 [ 45.136388] ? force_sig+0x30/0x30 [ 45.136672] ? _raw_spin_unlock_irq+0x27/0x70 [ 45.137033] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.137441] do_group_exit+0x149/0x400 [ 45.137760] ? SyS_exit+0x30/0x30 [ 45.138051] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.138397] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.138799] SyS_exit_group+0x1d/0x20 [ 45.139147] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.139574] RIP: 0033:0x447299 [ 45.139889] RSP: 002b:0000000000a5f9d8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 45.140644] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000447299 [ 45.141303] RDX: 0000000000000000 RSI: 0000000000750be8 RDI: 0000000000000000 [ 45.141959] RBP: 0000000000000082 R08: 000000190040e4b0 R09: 000000000040e420 [ 45.142704] R10: 0000000000000000 R11: 0000000000000202 R12: fffffffffffffffe [ 45.143423] R13: 000000000070802c R14: 0000000000000009 R15: 000000002052e000 [ 45.144117] [ 45.144270] Allocated by task 3043: [ 45.144601] save_stack_trace+0x16/0x20 [ 45.144972] save_stack+0x43/0xd0 [ 45.145288] kasan_kmalloc+0xad/0xe0 [ 45.145626] kmem_cache_alloc_trace+0x136/0x750 [ 45.146050] fanout_add+0xa50/0x1190 [ 45.146388] packet_setsockopt+0xfdc/0x1e80 [ 45.146781] SyS_setsockopt+0x189/0x360 [ 45.147143] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.147570] [ 45.147736] Freed by task 3042: [ 45.148047] save_stack_trace+0x16/0x20 [ 45.148409] save_stack+0x43/0xd0 [ 45.148739] kasan_slab_free+0x71/0xc0 [ 45.149119] kfree+0xca/0x250 [ 45.149455] packet_release+0xa8f/0xd70 [ 45.149912] sock_release+0x8d/0x1e0 [ 45.150265] sock_close+0x16/0x20 [ 45.150520] __fput+0x333/0x7f0 [ 45.150749] ____fput+0x15/0x20 [ 45.151005] task_work_run+0x199/0x270 [ 45.151360] do_exit+0xa52/0x1b40 [ 45.151702] do_group_exit+0x149/0x400 [ 45.152124] SyS_exit_group+0x1d/0x20 [ 45.152472] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.153483] [ 45.153636] The buggy address belongs to the object at ffff88006a322500 [ 45.153636] which belongs to the cache kmalloc-4096 of size 4096 [ 45.154799] The buggy address is located 2216 bytes inside of [ 45.154799] 4096-byte region [ffff88006a322500, ffff88006a323500) [ 45.155875] The buggy address belongs to the page: [ 45.156316] page:ffffea0001a8c880 count:1 mapcount:0 mapping:ffff88006a322500 index:0x0 compound_mapcount: 0 [ 45.157225] flags: 0x500000000008100(slab|head) [ 45.157650] raw: 0500000000008100 ffff88006a322500 0000000000000000 0000000100000001 [ 45.158359] raw: ffffea00019f45a0 ffff88006d800a50 ffff88003e800dc0 0000000000000000 [ 45.159067] page dumped because: kasan: bad access detected [ 45.159580] [ 45.159731] Memory state around the buggy address: [ 45.160178] ffff88006a322c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.160886] ffff88006a322d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.161671] >ffff88006a322d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.162331] ^ [ 45.162791] ffff88006a322e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.163504] ffff88006a322e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.164190] ================================================================== [ 45.164920] Disabling lock debugging due to kernel taint [ 45.165455] Kernel panic - not syncing: panic_on_warn set ... [ 45.165455] [ 45.166122] CPU: 0 PID: 3042 Comm: syz-executor0 Tainted: G B 4.13.0-next-20170906+ #16 [ 45.167006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 45.167793] Call Trace: [ 45.168029] dump_stack+0x194/0x257 [ 45.168358] ? arch_local_irq_restore+0x53/0x53 [ 45.168834] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.169290] ? __dev_remove_pack+0x2f0/0x3b0 [ 45.169750] panic+0x1e4/0x417 [ 45.170052] ? __warn+0x1d9/0x1d9 [ 45.170396] ? __dev_remove_pack+0x305/0x3b0 [ 45.170792] kasan_end_report+0x50/0x50 [ 45.171150] kasan_report+0x137/0x340 [ 45.171405] __asan_report_load8_noabort+0x14/0x20 [ 45.171821] __dev_remove_pack+0x305/0x3b0 [ 45.172229] ? dev_get_by_name_rcu+0x270/0x270 [ 45.172642] ? refcount_sub_and_test+0x115/0x1b0 [ 45.173116] __unregister_prot_hook+0x211/0x280 [ 45.173574] packet_release+0x8bb/0xd70 [ 45.173932] ? packet_set_ring+0x1b70/0x1b70 [ 45.174526] ? dentry_free+0xcd/0x130 [ 45.174852] ? rcu_read_lock_sched_held+0x108/0x120 [ 45.175312] ? kmem_cache_free+0x249/0x280 [ 45.175708] ? dentry_free+0xd2/0x130 [ 45.176054] ? locks_remove_file+0x3fa/0x5a0 [ 45.176452] ? fcntl_setlk+0x10d0/0x10d0 [ 45.176859] ? __fsnotify_parent+0xb4/0x3a0 [ 45.177250] ? fsnotify+0x1af0/0x1af0 [ 45.177687] sock_release+0x8d/0x1e0 [ 45.178061] ? sock_release+0x8d/0x1e0 [ 45.178411] ? sock_release+0x1e0/0x1e0 [ 45.178770] sock_close+0x16/0x20 [ 45.179059] __fput+0x333/0x7f0 [ 45.179369] ? fput+0x140/0x140 [ 45.179719] ? check_same_owner+0x320/0x320 [ 45.180146] ? _raw_spin_unlock_irq+0x27/0x70 [ 45.180578] ____fput+0x15/0x20 [ 45.180878] task_work_run+0x199/0x270 [ 45.181230] ? task_work_cancel+0x210/0x210 [ 45.181619] ? _raw_spin_unlock+0x22/0x30 [ 45.181993] ? switch_task_namespaces+0x87/0xc0 [ 45.182414] do_exit+0xa52/0x1b40 [ 45.182743] ? do_raw_spin_trylock+0x190/0x190 [ 45.183237] ? SyS_setgroups+0x250/0x250 [ 45.183680] ? mm_update_next_owner+0x930/0x930 [ 45.184113] ? sched_clock+0x31/0x40 [ 45.184449] ? trace_hardirqs_off+0xd/0x10 [ 45.184834] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 45.185321] ? try_to_wake_up+0x115/0x1850 [ 45.185810] ? find_held_lock+0x39/0x1d0 [ 45.186242] ? check_noncircular+0x20/0x20 [ 45.186666] ? migrate_swap_stop+0x970/0x970 [ 45.187088] ? do_nanosleep+0x508/0x6f0 [ 45.187449] ? schedule_timeout_idle+0x90/0x90 [ 45.187863] ? find_held_lock+0x39/0x1d0 [ 45.188233] ? lock_downgrade+0x990/0x990 [ 45.188745] ? do_group_exit+0x1fe/0x400 [ 45.189113] ? nanosleep_copyout+0x100/0x100 [ 45.189511] ? do_raw_spin_trylock+0x190/0x190 [ 45.189922] ? signal_wake_up_state+0x3a/0x40 [ 45.190328] ? zap_other_threads+0x1ca/0x240 [ 45.190725] ? force_sig+0x30/0x30 [ 45.191046] ? _raw_spin_unlock_irq+0x27/0x70 [ 45.191451] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.191904] do_group_exit+0x149/0x400 [ 45.192256] ? SyS_exit+0x30/0x30 [ 45.192594] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.193054] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.193510] SyS_exit_group+0x1d/0x20 [ 45.193854] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.194282] RIP: 0033:0x447299 [ 45.194566] RSP: 002b:0000000000a5f9d8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 45.195258] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000447299 [ 45.196135] RDX: 0000000000000000 RSI: 0000000000750be8 RDI: 0000000000000000 [ 45.196706] RBP: 0000000000000082 R08: 000000190040e4b0 R09: 000000000040e420 [ 45.197357] R10: 0000000000000000 R11: 0000000000000202 R12: fffffffffffffffe [ 45.198034] R13: 000000000070802c R14: 0000000000000009 R15: 000000002052e000 [ 45.198842] Dumping ftrace buffer: [ 45.199199] (ftrace buffer empty) [ 45.199532] Kernel Offset: disabled [ 45.199860] Rebooting in 86400 seconds..