2017/09/04 07:15:18 parsed 1 programs 2017/09/04 07:15:18 executed programs: 0 syzkaller login: [ 27.859553] dev_remove_pack: ffff880039d0dc00 not found [ 27.885256] ================================================================== [ 27.885879] BUG: KASAN: use-after-free in __dev_remove_pack+0x305/0x3b0 [ 27.886340] Read of size 8 at addr ffff880039c0d068 by task syz-executor0/3085 [ 27.886909] [ 27.887025] CPU: 2 PID: 3085 Comm: syz-executor0 Not tainted 4.13.0-rc7-next-20170901+ #13 [ 27.887638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 27.888320] Call Trace: [ 27.888602] dump_stack+0x194/0x257 [ 27.889011] ? arch_local_irq_restore+0x53/0x53 [ 27.889525] ? show_regs_print_info+0x65/0x65 [ 27.890011] ? __dev_remove_pack+0x305/0x3b0 [ 27.890581] print_address_description+0x73/0x250 [ 27.891057] ? __dev_remove_pack+0x305/0x3b0 [ 27.891526] kasan_report+0x24e/0x340 [ 27.891896] __asan_report_load8_noabort+0x14/0x20 [ 27.892378] __dev_remove_pack+0x305/0x3b0 [ 27.892827] ? dev_get_by_name_rcu+0x270/0x270 [ 27.893257] ? refcount_sub_and_test+0x115/0x1b0 [ 27.893703] __unregister_prot_hook+0x211/0x280 [ 27.894140] packet_release+0x8bb/0xd70 [ 27.894512] ? packet_set_ring+0x1b70/0x1b70 [ 27.894919] ? dentry_free+0xcd/0x130 [ 27.895272] ? rcu_read_lock_sched_held+0x108/0x120 [ 27.895731] ? kmem_cache_free+0x249/0x280 [ 27.896123] ? dentry_free+0xd2/0x130 [ 27.896479] ? locks_remove_file+0x3fa/0x5a0 [ 27.896882] ? fcntl_setlk+0x10d0/0x10d0 [ 27.897260] ? __fsnotify_parent+0xb4/0x3a0 [ 27.897661] ? fsnotify+0x1af0/0x1af0 [ 27.898011] sock_release+0x8d/0x1e0 [ 27.898347] ? sock_release+0x8d/0x1e0 [ 27.898703] ? sock_release+0x1e0/0x1e0 [ 27.899063] sock_close+0x16/0x20 [ 27.899384] __fput+0x333/0x7f0 [ 27.899694] ? fput+0x140/0x140 [ 27.899998] ? check_same_owner+0x320/0x320 [ 27.900396] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.900811] ____fput+0x15/0x20 [ 27.901141] task_work_run+0x199/0x270 [ 27.901509] ? task_work_cancel+0x210/0x210 [ 27.901906] ? _raw_spin_unlock+0x22/0x30 [ 27.902284] ? switch_task_namespaces+0x87/0xc0 [ 27.902716] do_exit+0xa52/0x1b40 [ 27.903035] ? do_raw_spin_trylock+0x190/0x190 [ 27.903457] ? SyS_setgroups+0x250/0x250 [ 27.904245] ? mm_update_next_owner+0x930/0x930 [ 27.904670] ? sched_clock+0x31/0x40 [ 27.905040] ? trace_hardirqs_off+0xd/0x10 [ 27.905430] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 27.905895] ? try_to_wake_up+0x115/0x1850 [ 27.906283] ? rcu_note_context_switch+0x710/0x710 [ 27.906732] ? check_noncircular+0x20/0x20 [ 27.907133] ? migrate_swap_stop+0x970/0x970 [ 27.907599] ? do_nanosleep+0x508/0x6f0 [ 27.908002] ? schedule_timeout_idle+0x90/0x90 [ 27.908430] ? find_held_lock+0x39/0x1d0 [ 27.908869] ? lock_downgrade+0x990/0x990 [ 27.909271] ? do_group_exit+0x1fe/0x400 [ 27.909637] ? nanosleep_copyout+0x100/0x100 [ 27.910035] ? do_raw_spin_trylock+0x190/0x190 [ 27.910443] ? signal_wake_up_state+0x3a/0x40 [ 27.910847] ? zap_other_threads+0x1ca/0x240 [ 27.911243] ? force_sig+0x30/0x30 [ 27.911564] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.911968] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.912423] do_group_exit+0x149/0x400 [ 27.912777] ? SyS_exit+0x30/0x30 [ 27.913094] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.913545] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.913979] SyS_exit_group+0x1d/0x20 [ 27.914326] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 27.914754] RIP: 0033:0x447299 [ 27.915043] RSP: 002b:00007fff0337b218 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 27.915746] RAX: ffffffffffffffda RBX: 0000000000006c79 RCX: 0000000000447299 [ 27.916493] RDX: 0000000000000000 RSI: 0000000000752b18 RDI: 0000000000000000 [ 27.917162] RBP: 0000000000000082 R08: 0000009e00000011 R09: 0000000000000c0a [ 27.917903] R10: 0000000000000000 R11: 0000000000000202 R12: fffffffffffffffe [ 27.918637] R13: 0000000000000003 R14: 000000000000000e R15: 0000000020cdeffc [ 27.919338] [ 27.919530] Allocated by task 3086: [ 27.919887] save_stack_trace+0x16/0x20 [ 27.920274] save_stack+0x43/0xd0 [ 27.920614] kasan_kmalloc+0xad/0xe0 [ 27.920984] kmem_cache_alloc_trace+0x136/0x750 [ 27.921407] fanout_add+0xa50/0x1190 [ 27.921770] packet_setsockopt+0xfdc/0x1e80 [ 27.922201] SyS_setsockopt+0x189/0x360 [ 27.922575] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 27.923030] [ 27.923186] Freed by task 3085: [ 27.923415] save_stack_trace+0x16/0x20 [ 27.923688] save_stack+0x43/0xd0 [ 27.923928] kasan_slab_free+0x71/0xc0 [ 27.924218] kfree+0xca/0x250 [ 27.924500] packet_release+0xa8f/0xd70 [ 27.924883] sock_release+0x8d/0x1e0 [ 27.925202] sock_close+0x16/0x20 [ 27.928143] __fput+0x333/0x7f0 [ 27.928434] ____fput+0x15/0x20 [ 27.928705] task_work_run+0x199/0x270 [ 27.929058] do_exit+0xa52/0x1b40 [ 27.929358] do_group_exit+0x149/0x400 [ 27.929689] SyS_exit_group+0x1d/0x20 [ 27.930018] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 27.930423] [ 27.930565] The buggy address belongs to the object at ffff880039c0c7c0 [ 27.930565] which belongs to the cache kmalloc-4096 of size 4096 [ 27.931673] The buggy address is located 2216 bytes inside of [ 27.931673] 4096-byte region [ffff880039c0c7c0, ffff880039c0d7c0) [ 27.932906] The buggy address belongs to the page: [ 27.933401] page:ffffea0000e70300 count:1 mapcount:0 mapping:ffff880039c0c7c0 index:0x0 compound_mapcount: 0 [ 27.934266] flags: 0x100000000008100(slab|head) [ 27.934702] raw: 0100000000008100 ffff880039c0c7c0 0000000000000000 0000000100000001 [ 27.935422] raw: ffffea0000e628a0 ffff88003e801a50 ffff88003e800dc0 0000000000000000 [ 27.936105] page dumped because: kasan: bad access detected [ 27.936591] [ 27.936733] Memory state around the buggy address: [ 27.937167] ffff880039c0cf00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.937792] ffff880039c0cf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.938447] >ffff880039c0d000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.939072] ^ [ 27.939646] ffff880039c0d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.940267] ffff880039c0d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.940916] ================================================================== [ 27.941632] Disabling lock debugging due to kernel taint [ 27.942110] Kernel panic - not syncing: panic_on_warn set ... [ 27.942110] [ 27.942733] CPU: 2 PID: 3085 Comm: syz-executor0 Tainted: G B 4.13.0-rc7-next-20170901+ #13 [ 27.943547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 27.944282] Call Trace: [ 27.944505] dump_stack+0x194/0x257 [ 27.944815] ? arch_local_irq_restore+0x53/0x53 [ 27.945225] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.945637] ? __dev_remove_pack+0x2a0/0x3b0 [ 27.946013] panic+0x1e4/0x417 [ 27.946897] ? __warn+0x1d9/0x1d9 [ 27.947199] ? __dev_remove_pack+0x305/0x3b0 [ 27.947628] kasan_end_report+0x50/0x50 [ 27.947991] kasan_report+0x137/0x340 [ 27.948383] __asan_report_load8_noabort+0x14/0x20 [ 27.948849] __dev_remove_pack+0x305/0x3b0 [ 27.949218] ? dev_get_by_name_rcu+0x270/0x270 [ 27.949615] ? refcount_sub_and_test+0x115/0x1b0 [ 27.950054] __unregister_prot_hook+0x211/0x280 [ 27.950449] packet_release+0x8bb/0xd70 [ 27.950788] ? packet_set_ring+0x1b70/0x1b70 [ 27.951153] ? dentry_free+0xcd/0x130 [ 27.951470] ? rcu_read_lock_sched_held+0x108/0x120 [ 27.951892] ? kmem_cache_free+0x249/0x280 [ 27.952243] ? dentry_free+0xd2/0x130 [ 27.952571] ? locks_remove_file+0x3fa/0x5a0 [ 27.952952] ? fcntl_setlk+0x10d0/0x10d0 [ 27.953294] ? __fsnotify_parent+0xb4/0x3a0 [ 27.953661] ? fsnotify+0x1af0/0x1af0 [ 27.953986] sock_release+0x8d/0x1e0 [ 27.954303] ? sock_release+0x8d/0x1e0 [ 27.954637] ? sock_release+0x1e0/0x1e0 [ 27.954968] sock_close+0x16/0x20 [ 27.955260] __fput+0x333/0x7f0 [ 27.955541] ? fput+0x140/0x140 [ 27.955814] ? check_same_owner+0x320/0x320 [ 27.956181] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.956565] ____fput+0x15/0x20 [ 27.956848] task_work_run+0x199/0x270 [ 27.957174] ? task_work_cancel+0x210/0x210 [ 27.957485] ? _raw_spin_unlock+0x22/0x30 [ 27.957833] ? switch_task_namespaces+0x87/0xc0 [ 27.958285] do_exit+0xa52/0x1b40 [ 27.958599] ? do_raw_spin_trylock+0x190/0x190 [ 27.959045] ? SyS_setgroups+0x250/0x250 [ 27.959445] ? mm_update_next_owner+0x930/0x930 [ 27.959870] ? sched_clock+0x31/0x40 [ 27.960189] ? trace_hardirqs_off+0xd/0x10 [ 27.960575] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 27.961064] ? try_to_wake_up+0x115/0x1850 [ 27.961479] ? rcu_note_context_switch+0x710/0x710 [ 27.961923] ? check_noncircular+0x20/0x20 [ 27.962286] ? migrate_swap_stop+0x970/0x970 [ 27.962659] ? do_nanosleep+0x508/0x6f0 [ 27.963001] ? schedule_timeout_idle+0x90/0x90 [ 27.963390] ? find_held_lock+0x39/0x1d0 [ 27.963732] ? lock_downgrade+0x990/0x990 [ 27.964099] ? do_group_exit+0x1fe/0x400 [ 27.964442] ? nanosleep_copyout+0x100/0x100 [ 27.964813] ? do_raw_spin_trylock+0x190/0x190 [ 27.965185] ? signal_wake_up_state+0x3a/0x40 [ 27.965522] ? zap_other_threads+0x1ca/0x240 [ 27.965838] ? force_sig+0x30/0x30 [ 27.966092] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.966486] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.966912] do_group_exit+0x149/0x400 [ 27.967284] ? SyS_exit+0x30/0x30 [ 27.967611] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.968623] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.969030] SyS_exit_group+0x1d/0x20 [ 27.969355] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 27.969734] RIP: 0033:0x447299 [ 27.970004] RSP: 002b:00007fff0337b218 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 27.970670] RAX: ffffffffffffffda RBX: 0000000000006c79 RCX: 0000000000447299 [ 27.971281] RDX: 0000000000000000 RSI: 0000000000752b18 RDI: 0000000000000000 [ 27.971893] RBP: 0000000000000082 R08: 0000009e00000011 R09: 0000000000000c0a [ 27.972509] R10: 0000000000000000 R11: 0000000000000202 R12: fffffffffffffffe [ 27.973124] R13: 0000000000000003 R14: 000000000000000e R15: 0000000020cdeffc [ 27.973798] Dumping ftrace buffer: [ 27.974107] (ftrace buffer empty) [ 27.974426] Kernel Offset: disabled [ 27.974739] Rebooting in 86400 seconds..