2017/09/03 03:49:02 parsed 1 programs 2017/09/03 03:49:02 executed programs: 0 syzkaller login: [ 23.583846] dev_remove_pack: ffff88006a9e1d80 not found [ 23.622391] ================================================================== [ 23.623195] BUG: KASAN: use-after-free in __dev_remove_pack+0x305/0x3b0 [ 23.623838] Read of size 8 at addr ffff880069295128 by task syz-executor0/2996 [ 23.624544] [ 23.624697] CPU: 3 PID: 2996 Comm: syz-executor0 Not tainted 4.13.0-rc7-next-20170901+ #13 [ 23.625500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 23.626193] Call Trace: [ 23.626540] dump_stack+0x194/0x257 [ 23.626885] ? arch_local_irq_restore+0x53/0x53 [ 23.627291] ? show_regs_print_info+0x65/0x65 [ 23.627657] ? __dev_remove_pack+0x305/0x3b0 [ 23.627980] print_address_description+0x73/0x250 [ 23.628372] ? __dev_remove_pack+0x305/0x3b0 [ 23.628700] kasan_report+0x24e/0x340 [ 23.628986] __asan_report_load8_noabort+0x14/0x20 [ 23.629318] __dev_remove_pack+0x305/0x3b0 [ 23.629620] ? dev_get_by_name_rcu+0x270/0x270 [ 23.629961] ? refcount_sub_and_test+0x115/0x1b0 [ 23.630327] __unregister_prot_hook+0x211/0x280 [ 23.630707] packet_release+0x8bb/0xd70 [ 23.631160] ? packet_set_ring+0x1b70/0x1b70 [ 23.631546] ? dentry_free+0xcd/0x130 [ 23.631924] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.632433] ? kmem_cache_free+0x249/0x280 [ 23.632850] ? dentry_free+0xd2/0x130 [ 23.633291] ? locks_remove_file+0x3fa/0x5a0 [ 23.633720] ? fcntl_setlk+0x10d0/0x10d0 [ 23.634034] ? __fsnotify_parent+0xb4/0x3a0 [ 23.634375] ? fsnotify+0x1af0/0x1af0 [ 23.634653] sock_release+0x8d/0x1e0 [ 23.634934] ? sock_release+0x8d/0x1e0 [ 23.635246] ? sock_release+0x1e0/0x1e0 [ 23.635507] sock_close+0x16/0x20 [ 23.635765] __fput+0x333/0x7f0 [ 23.636008] ? fput+0x140/0x140 [ 23.636360] ? check_same_owner+0x320/0x320 [ 23.636779] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.637220] ____fput+0x15/0x20 [ 23.637563] task_work_run+0x199/0x270 [ 23.638684] ? task_work_cancel+0x210/0x210 [ 23.639149] ? _raw_spin_unlock+0x22/0x30 [ 23.639692] ? switch_task_namespaces+0x87/0xc0 [ 23.640300] do_exit+0xa52/0x1b40 [ 23.640746] ? plist_check_list+0xa0/0xa0 [ 23.641315] ? plist_del+0x47b/0x990 [ 23.641733] ? mm_update_next_owner+0x930/0x930 [ 23.642399] ? plist_add+0x760/0x760 [ 23.642830] ? check_same_owner+0x320/0x320 [ 23.645339] ? osq_unlock+0x350/0x350 [ 23.645714] ? find_held_lock+0x39/0x1d0 [ 23.647286] ? check_noncircular+0x20/0x20 [ 23.647836] ? refill_pi_state_cache.part.6+0x2f0/0x2f0 [ 23.648616] ? find_held_lock+0x39/0x1d0 [ 23.649247] ? lock_downgrade+0x990/0x990 [ 23.649811] ? recalc_sigpending_tsk+0x117/0x150 [ 23.650449] ? retint_kernel+0x10/0x10 [ 23.650982] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.651462] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.651874] do_group_exit+0x149/0x400 [ 23.652375] ? SyS_exit+0x30/0x30 [ 23.652691] ? _raw_spin_unlock_irq+0x56/0x70 [ 23.653154] get_signal+0x7e8/0x17e0 [ 23.653540] ? ptrace_notify+0x130/0x130 [ 23.653918] ? __fget+0xbb/0x580 [ 23.654269] ? lock_release+0xd70/0xd70 [ 23.654684] ? exit_robust_list+0x240/0x240 [ 23.655158] do_signal+0x94/0x1ee0 [ 23.655494] ? iterate_fd+0x3f0/0x3f0 [ 23.655854] ? setup_sigcontext+0x7d0/0x7d0 [ 23.656307] ? find_held_lock+0x39/0x1d0 [ 23.656603] ? __fget_light+0x29d/0x390 [ 23.656904] ? selinux_tun_dev_create+0xc0/0xc0 [ 23.657369] ? selinux_netlbl_socket_setsockopt+0x10c/0x460 [ 23.657904] ? selinux_netlbl_sock_rcv_skb+0x730/0x730 [ 23.658433] ? exit_to_usermode_loop+0x98/0x300 [ 23.658879] exit_to_usermode_loop+0x224/0x300 [ 23.660391] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 23.660922] syscall_return_slowpath+0x42f/0x500 [ 23.661375] ? prepare_exit_to_usermode+0x2c0/0x2c0 [ 23.661848] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 23.662314] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.662790] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.663250] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 23.663780] RIP: 0033:0x447299 [ 23.664111] RSP: 002b:00007ff833589cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 23.664893] RAX: fffffffffffffe00 RBX: 00000000007080d8 RCX: 0000000000447299 [ 23.665634] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000007080d8 [ 23.666357] RBP: 00000000007080b0 R08: 0000000000000000 R09: 0000000000000000 [ 23.667226] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 23.668093] R13: 0000000000000000 R14: 00007ff83358a9c0 R15: 00007ff83358a700 [ 23.668792] [ 23.668927] Allocated by task 2995: [ 23.669234] save_stack_trace+0x16/0x20 [ 23.669649] save_stack+0x43/0xd0 [ 23.669990] kasan_kmalloc+0xad/0xe0 [ 23.670369] kmem_cache_alloc_trace+0x136/0x750 [ 23.670803] fanout_add+0xa50/0x1190 [ 23.671138] packet_setsockopt+0xfdc/0x1e80 [ 23.671589] SyS_setsockopt+0x189/0x360 [ 23.672070] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 23.672556] [ 23.672771] Freed by task 2996: [ 23.673116] save_stack_trace+0x16/0x20 [ 23.673530] save_stack+0x43/0xd0 [ 23.673886] kasan_slab_free+0x71/0xc0 [ 23.674247] kfree+0xca/0x250 [ 23.674567] packet_release+0xa8f/0xd70 [ 23.674986] sock_release+0x8d/0x1e0 [ 23.675411] sock_close+0x16/0x20 [ 23.675771] __fput+0x333/0x7f0 [ 23.676091] ____fput+0x15/0x20 [ 23.676458] task_work_run+0x199/0x270 [ 23.676871] do_exit+0xa52/0x1b40 [ 23.677226] do_group_exit+0x149/0x400 [ 23.677629] get_signal+0x7e8/0x17e0 [ 23.678015] do_signal+0x94/0x1ee0 [ 23.678380] exit_to_usermode_loop+0x224/0x300 [ 23.678852] syscall_return_slowpath+0x42f/0x500 [ 23.679355] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 23.679831] [ 23.679993] The buggy address belongs to the object at ffff880069294880 [ 23.679993] which belongs to the cache kmalloc-4096 of size 4096 [ 23.681233] The buggy address is located 2216 bytes inside of [ 23.681233] 4096-byte region [ffff880069294880, ffff880069295880) [ 23.682131] The buggy address belongs to the page: [ 23.682608] page:ffffea0001a4a500 count:1 mapcount:0 mapping:ffff880069294880 index:0x0 compound_mapcount: 0 [ 23.683787] flags: 0x500000000008100(slab|head) [ 23.684372] raw: 0500000000008100 ffff880069294880 0000000000000000 0000000100000001 [ 23.685327] raw: ffffea0001b49ba0 ffff88006d800a50 ffff88003e800dc0 0000000000000000 [ 23.686278] page dumped because: kasan: bad access detected [ 23.686878] [ 23.687093] Memory state around the buggy address: [ 23.687480] ffff880069295000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.688048] ffff880069295080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.688592] >ffff880069295100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.689134] ^ [ 23.689486] ffff880069295180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.690034] ffff880069295200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.690587] ================================================================== [ 23.691293] Disabling lock debugging due to kernel taint [ 23.691753] Kernel panic - not syncing: panic_on_warn set ... [ 23.691753] [ 23.692197] CPU: 3 PID: 2996 Comm: syz-executor0 Tainted: G B 4.13.0-rc7-next-20170901+ #13 [ 23.692756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 23.693241] Call Trace: [ 23.693399] dump_stack+0x194/0x257 [ 23.693619] ? arch_local_irq_restore+0x53/0x53 [ 23.693925] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.694209] ? __dev_remove_pack+0x2a0/0x3b0 [ 23.694472] panic+0x1e4/0x417 [ 23.694663] ? __warn+0x1d9/0x1d9 [ 23.694906] ? __dev_remove_pack+0x305/0x3b0 [ 23.695367] kasan_end_report+0x50/0x50 [ 23.695761] kasan_report+0x137/0x340 [ 23.696146] __asan_report_load8_noabort+0x14/0x20 [ 23.696633] __dev_remove_pack+0x305/0x3b0 [ 23.697063] ? dev_get_by_name_rcu+0x270/0x270 [ 23.697526] ? refcount_sub_and_test+0x115/0x1b0 [ 23.698007] __unregister_prot_hook+0x211/0x280 [ 23.698475] packet_release+0x8bb/0xd70 [ 23.698887] ? packet_set_ring+0x1b70/0x1b70 [ 23.699307] ? dentry_free+0xcd/0x130 [ 23.699682] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.700184] ? kmem_cache_free+0x249/0x280 [ 23.700614] ? dentry_free+0xd2/0x130 [ 23.700996] ? locks_remove_file+0x3fa/0x5a0 [ 23.701438] ? fcntl_setlk+0x10d0/0x10d0 [ 23.701832] ? __fsnotify_parent+0xb4/0x3a0 [ 23.703200] ? fsnotify+0x1af0/0x1af0 [ 23.703561] sock_release+0x8d/0x1e0 [ 23.703924] ? sock_release+0x8d/0x1e0 [ 23.704335] ? sock_release+0x1e0/0x1e0 [ 23.704750] sock_close+0x16/0x20 [ 23.705113] __fput+0x333/0x7f0 [ 23.705468] ? fput+0x140/0x140 [ 23.705829] ? check_same_owner+0x320/0x320 [ 23.706279] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.706763] ____fput+0x15/0x20 [ 23.707097] task_work_run+0x199/0x270 [ 23.707462] ? task_work_cancel+0x210/0x210 [ 23.707855] ? _raw_spin_unlock+0x22/0x30 [ 23.708227] ? switch_task_namespaces+0x87/0xc0 [ 23.708647] do_exit+0xa52/0x1b40 [ 23.709060] ? plist_check_list+0xa0/0xa0 [ 23.709802] ? plist_del+0x47b/0x990 [ 23.710454] ? mm_update_next_owner+0x930/0x930 [ 23.711277] ? plist_add+0x760/0x760 [ 23.711940] ? check_same_owner+0x320/0x320 [ 23.712708] ? osq_unlock+0x350/0x350 [ 23.713277] ? find_held_lock+0x39/0x1d0 [ 23.713815] ? check_noncircular+0x20/0x20 [ 23.714225] ? refill_pi_state_cache.part.6+0x2f0/0x2f0 [ 23.714739] ? find_held_lock+0x39/0x1d0 [ 23.715149] ? lock_downgrade+0x990/0x990 [ 23.715567] ? recalc_sigpending_tsk+0x117/0x150 [ 23.716036] ? retint_kernel+0x10/0x10 [ 23.716431] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.716828] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.717182] do_group_exit+0x149/0x400 [ 23.717468] ? SyS_exit+0x30/0x30 [ 23.717692] ? _raw_spin_unlock_irq+0x56/0x70 [ 23.718003] get_signal+0x7e8/0x17e0 [ 23.718264] ? ptrace_notify+0x130/0x130 [ 23.718572] ? __fget+0xbb/0x580 [ 23.718858] ? lock_release+0xd70/0xd70 [ 23.719176] ? exit_robust_list+0x240/0x240 [ 23.719538] do_signal+0x94/0x1ee0 [ 23.719840] ? iterate_fd+0x3f0/0x3f0 [ 23.720141] ? setup_sigcontext+0x7d0/0x7d0 [ 23.720524] ? find_held_lock+0x39/0x1d0 [ 23.720950] ? __fget_light+0x29d/0x390 [ 23.721276] ? selinux_tun_dev_create+0xc0/0xc0 [ 23.721673] ? selinux_netlbl_socket_setsockopt+0x10c/0x460 [ 23.722120] ? selinux_netlbl_sock_rcv_skb+0x730/0x730 [ 23.722556] ? exit_to_usermode_loop+0x98/0x300 [ 23.722953] exit_to_usermode_loop+0x224/0x300 [ 23.723390] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 23.724132] syscall_return_slowpath+0x42f/0x500 [ 23.724500] ? prepare_exit_to_usermode+0x2c0/0x2c0 [ 23.724932] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 23.725324] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.725734] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.726114] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 23.726497] RIP: 0033:0x447299 [ 23.726767] RSP: 002b:00007ff833589cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 23.727362] RAX: fffffffffffffe00 RBX: 00000000007080d8 RCX: 0000000000447299 [ 23.727914] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000007080d8 [ 23.728454] RBP: 00000000007080b0 R08: 0000000000000000 R09: 0000000000000000 [ 23.729014] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 23.729623] R13: 0000000000000000 R14: 00007ff83358a9c0 R15: 00007ff83358a700 [ 23.730241] Dumping ftrace buffer: [ 23.730483] (ftrace buffer empty) [ 23.730746] Kernel Offset: disabled [ 23.731009] Rebooting in 86400 seconds..