Debian GNU/Linux 7 syzkaller ttyS0 2017/08/16 09:07:34 parsed 1 programs 2017/08/16 09:07:34 executed programs: 0 syzkaller login: [ 37.380136] kasan: CONFIG_KASAN_INLINE enabled [ 37.380625] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.381399] general protection fault: 0000 [#1] SMP KASAN [ 37.381951] Dumping ftrace buffer: [ 37.382297] (ftrace buffer empty) [ 37.382656] Modules linked in: [ 37.382974] CPU: 1 PID: 7260 Comm: syz-executor0 Not tainted 4.13.0-rc5-next-20170816+ #4 [ 37.383781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 37.384420] task: ffff88003c9dc6c0 task.stack: ffff88003aeb0000 [ 37.384844] RIP: 0010:skb_clone+0x28d/0x480 [ 37.385152] RSP: 0018:ffff88003aeb6e08 EFLAGS: 00010206 [ 37.385551] RAX: dffffc0000000000 RBX: ffff88003e984c80 RCX: 1ffff100075d6df3 [ 37.386154] RDX: 0000000020000000 RSI: 0000000001080020 RDI: ffff880069707a68 [ 37.386834] RBP: ffff88003aeb6ee0 R08: 0000000000000000 R09: 1ffff100075d6dab [ 37.387505] R10: ffff88003aeb6d20 R11: ffffffff85b34c40 R12: 1ffff100075d6dc3 [ 37.387996] R13: 0000000100000000 R14: 0000000001080020 R15: ffff88003aeb6eb8 [ 37.388486] FS: 00007f2fd482a700(0000) GS:ffff88003ed00000(0000) knlGS:0000000000000000 [ 37.389066] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.389452] CR2: 0000000000457040 CR3: 000000006d09e000 CR4: 00000000000006e0 [ 37.389949] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.390447] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.390938] Call Trace: [ 37.391127] ? skb_split+0x1310/0x1310 [ 37.391390] ? run_filter+0x21c/0x360 [ 37.391641] ? packet_sendmsg+0x6010/0x6010 [ 37.391945] ? lock_acquire+0x1d5/0x580 [ 37.392243] ? lock_acquire+0x1d5/0x580 [ 37.392508] packet_rcv+0x1103/0x15a0 [ 37.392763] ? run_filter+0x360/0x360 [ 37.393045] ? _raw_spin_unlock_bh+0x30/0x40 [ 37.393352] ? prandom_u32_state+0x13/0x180 [ 37.393639] ? prandom_u32+0x24/0x30 [ 37.393897] ? fanout_demux_rollover+0x24c/0x4d0 [ 37.394241] packet_rcv_fanout+0x4f5/0x7d0 [ 37.394526] ? compat_packet_setsockopt+0x140/0x140 [ 37.394856] ? refcount_add+0x60/0x60 [ 37.395139] __netif_receive_skb_core+0x1bbf/0x33d0 [ 37.395491] ? unwind_get_return_address+0x61/0xa0 [ 37.395821] ? nf_ingress+0x9f0/0x9f0 [ 37.396091] ? save_stack+0xa3/0xd0 [ 37.396332] ? save_stack_trace+0x16/0x20 [ 37.396622] ? save_stack+0x43/0xd0 [ 37.396863] ? kasan_kmalloc+0xad/0xe0 [ 37.397147] ? kasan_slab_alloc+0x12/0x20 [ 37.397427] ? kmem_cache_alloc+0x12e/0x760 [ 37.397723] ? __build_skb+0x9d/0x450 [ 37.397973] ? build_skb+0x6f/0x260 [ 37.398885] ? tun_get_user+0x1db7/0x2150 [ 37.399178] ? tun_chr_write_iter+0xd8/0x190 [ 37.399506] ? __vfs_write+0x684/0x970 [ 37.399790] ? vfs_write+0x189/0x510 [ 37.400044] ? SyS_write+0xef/0x220 [ 37.400286] ? entry_SYSCALL_64_fastpath+0x1f/0xbe [ 37.400645] ? __schedule+0x8f0/0x2070 [ 37.400909] ? __skb_flow_dissect+0xfa6/0x3ad0 [ 37.401231] ? __sched_text_start+0x8/0x8 [ 37.401546] ? plist_check_list+0x7e/0xa0 [ 37.401883] ? __skb_flow_get_ports+0x400/0x400 [ 37.402287] ? lock_acquire+0x1d5/0x580 [ 37.402581] ? netif_receive_skb_internal+0x1d7/0x5e0 [ 37.402937] ? lock_downgrade+0x990/0x990 [ 37.403227] ? kasan_kmalloc+0x81/0xe0 [ 37.403487] ? pvclock_read_flags+0x160/0x160 [ 37.403799] ? __build_skb+0x325/0x450 [ 37.404083] ? lock_acquire+0x1d5/0x580 [ 37.404346] ? lock_acquire+0x1d5/0x580 [ 37.404623] ? netif_receive_skb_internal+0x93/0x5e0 [ 37.404973] ? ktime_get_with_offset+0x2c1/0x420 [ 37.405279] ? lock_release+0xa40/0xa40 [ 37.405524] ? do_gettimeofday+0x190/0x190 [ 37.405820] ? __build_skb+0x450/0x450 [ 37.406106] __netif_receive_skb+0x2c/0x1b0 [ 37.406391] ? __netif_receive_skb+0x2c/0x1b0 [ 37.406686] netif_receive_skb_internal+0x10b/0x5e0 [ 37.407062] ? dev_cpu_dead+0xb00/0xb00 [ 37.407330] ? tun_device_event+0xca0/0xca0 [ 37.407623] ? futex_wake+0x680/0x680 [ 37.407894] ? drop_futex_key_refs.isra.13+0x63/0xb0 [ 37.408257] netif_receive_skb+0xae/0x390 [ 37.408532] ? netif_receive_skb_internal+0x5e0/0x5e0 [ 37.408878] ? futex_wait_setup+0x3d0/0x3d0 [ 37.409204] ? tun_rx_batched.isra.43+0x5bd/0x860 [ 37.409525] tun_rx_batched.isra.43+0x5e7/0x860 [ 37.409834] ? skb_get_hash_perturb+0x9d0/0x9d0 [ 37.410167] ? tun_sock_write_space+0x370/0x370 [ 37.410491] ? tun_free_netdev+0x1b0/0x1b0 [ 37.410776] tun_get_user+0x11dd/0x2150 [ 37.411060] ? tun_flow_update+0xf70/0xf70 [ 37.411365] ? lock_acquire+0x1d5/0x580 [ 37.411627] ? lock_acquire+0x1d5/0x580 [ 37.411889] ? __tun_get+0x1ab/0x2e0 [ 37.412174] ? lock_downgrade+0x990/0x990 [ 37.412465] ? lock_release+0xa40/0xa40 [ 37.412731] ? __fget+0x35c/0x570 [ 37.412961] ? __fget+0x35c/0x570 [ 37.413222] ? __tun_get+0x1d4/0x2e0 [ 37.413488] ? tun_chr_close+0x60/0x60 [ 37.413753] tun_chr_write_iter+0xd8/0x190 [ 37.414052] __vfs_write+0x684/0x970 [ 37.414320] ? default_llseek+0x290/0x290 [ 37.414614] ? _cond_resched+0x14/0x30 [ 37.414873] ? avc_policy_seqno+0x9/0x20 [ 37.415154] ? selinux_file_permission+0x82/0x460 [ 37.415503] ? rw_verify_area+0xe5/0x2b0 [ 37.415787] ? __fdget_raw+0x20/0x20 [ 37.416042] vfs_write+0x189/0x510 [ 37.416279] SyS_write+0xef/0x220 [ 37.416556] ? SyS_read+0x220/0x220 [ 37.416814] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 37.417165] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 37.417514] RIP: 0033:0x40bab1 [ 37.417830] RSP: 002b:00007f2fd4829c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 37.418407] RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 000000000040bab1 [ 37.418924] RDX: 0000000000000013 RSI: 0000000020ee9000 RDI: 0000000000000003 [ 37.419457] RBP: 0000000000708000 R08: 0000000000000000 R09: 0000000000000000 [ 37.419987] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff [ 37.420542] R13: 00000000000002f0 R14: 00000000006e23b0 R15: 0000000020001fd0 [ 37.421119] Code: 02 00 0f 85 a1 01 00 00 4d 8b 6d 28 4d 85 ed 0f 84 a4 fe ff ff e8 94 13 8d fd 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 d7 01 00 00 49 81 7d 00 60 f7 df 83 0f 84 76 [ 37.422569] RIP: skb_clone+0x28d/0x480 RSP: ffff88003aeb6e08 [ 37.422997] ---[ end trace 5413f016a345a15d ]--- [ 37.423353] Kernel panic - not syncing: Fatal exception in interrupt [ 37.423947] Dumping ftrace buffer: [ 37.424186] (ftrace buffer empty) [ 37.424430] Kernel Offset: disabled [ 37.424670] Rebooting in 86400 seconds..