| TITLE: BUG: unable to handle kernel NULL pointer dereference in rtnl_dump_ifinfo |
| |
| [ 218.951194] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 |
| [ 218.959174] IP: strlen+0x0/0x30 |
| [ 218.962422] PGD 1fa2a3067 P4D 1fa2a3067 PUD 2156db067 PMD 0 |
| [ 218.968196] Oops: 0000 [#1] SMP |
| [ 218.971442] Dumping ftrace buffer: |
| [ 218.974947] (ftrace buffer empty) |
| [ 218.978622] Modules linked in: |
| [ 218.981784] CPU: 0 PID: 25068 Comm: syz-executor5 Not tainted 4.15.0-rc3-next-20171214+ #67 |
| [ 218.990234] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 218.999558] RIP: 0010:strlen+0x0/0x30 |
| [ 219.003321] RSP: 0018:ffffc90000f63728 EFLAGS: 00010202 |
| [ 219.008648] RAX: 0000000000010000 RBX: ffff880215647500 RCX: ffffffff820f1e86 |
| [ 219.015882] RDX: 0000000000003b6e RSI: ffffc90004536000 RDI: 0000000000000010 |
| [ 219.023120] RBP: ffffc90000f637a8 R08: 0000000000000000 R09: ffff88020d91707d |
| [ 219.030354] R10: ffffc90000f636b8 R11: 0000000000000002 R12: ffff8801fba87000 |
| [ 219.037590] R13: 0000000000000010 R14: 0000000000000000 R15: ffff88020d917000 |
| [ 219.044829] FS: 00007f7abdffd700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 |
| [ 219.053022] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| [ 219.058867] CR2: 0000000000000010 CR3: 000000020f0fe005 CR4: 00000000001606f0 |
| [ 219.066108] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 |
| [ 219.073343] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 |
| [ 219.080574] Call Trace: |
| [ 219.083128] ? rtnl_fill_ifinfo+0x476/0x15b0 |
| [ 219.087506] rtnl_dump_ifinfo+0x37c/0x570 |
| [ 219.091638] netlink_dump+0x14e/0x360 |
| [ 219.095405] __netlink_dump_start+0x1bb/0x210 |
| [ 219.099863] rtnetlink_rcv_msg+0x44f/0x5d0 |
| [ 219.104061] ? rtnl_getlink+0x2d0/0x2d0 |
| [ 219.107998] ? rtnl_getlink+0x2d0/0x2d0 |
| [ 219.111940] ? validate_linkmsg+0x470/0x470 |
| [ 219.116227] netlink_rcv_skb+0x92/0x160 |
| [ 219.120167] rtnetlink_rcv+0x1c/0x20 |
| [ 219.123843] netlink_unicast+0x1d4/0x290 |
| [ 219.127877] netlink_sendmsg+0x345/0x470 |
| [ 219.131915] sock_sendmsg+0x51/0x70 |
| [ 219.135507] sock_write_iter+0xa4/0x100 |
| [ 219.139451] do_iter_readv_writev+0x17d/0x1f0 |
| [ 219.143915] do_iter_write+0xbc/0x210 |
| [ 219.147681] vfs_writev+0xa1/0x120 |
| [ 219.151188] ? __fget+0x160/0x290 |
| [ 219.154606] ? finish_task_switch+0x60/0x210 |
| [ 219.158980] do_writev+0x5e/0x100 |
| [ 219.162395] ? do_writev+0x5e/0x100 |
| [ 219.165987] SyS_writev+0x27/0x30 |
| [ 219.169408] entry_SYSCALL_64_fastpath+0x1f/0x96 |
| [ 219.174125] RIP: 0033:0x452a09 |
| [ 219.177281] RSP: 002b:00007f7abdffcc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000014 |
| [ 219.184953] RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09 |
| [ 219.192187] RDX: 0000000000000001 RSI: 00000000206f6000 RDI: 0000000000000013 |
| [ 219.199422] RBP: 000000000000056f R08: 0000000000000000 R09: 0000000000000000 |
| [ 219.206655] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f5308 |
| [ 219.213892] R13: 00000000ffffffff R14: 00007f7abdffd6d4 R15: 0000000000000000 |
| [ 219.221131] Code: 89 f8 48 89 fa 48 89 e5 74 09 48 83 c2 01 80 3a 00 75 f7 48 83 c6 01 0f b6 4e ff 48 83 c2 01 84 c9 88 4a ff 75 ed 5d c3 0f 1f 00 <80> 3f 00 55 48 89 e5 74 14 48 89 f8 48 83 c7 01 80 3f 00 75 f7 |
| 2017/12/19 12:31:44 executing program 7: |
| mmap(&(0x7f0000000000/0xfff000)=nil, 0xfff000, 0x3, 0x32, 0xffffffffffffffff, 0x0) |
| r0 = socket(0x40000000015, 0x5, 0x3) |
| getgid() |
| bind$inet(r0, &(0x7f0000004000-0x10)={0x2, 0x0, @loopback=0x7f000001, [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]}, 0x10) |
| sendto$inet(r0, &(0x7f00003da000)="b4ceb8df5437ccd2e12038967c3763260b229b5c4833a5589d3330709b2d4540b8b87b1a9c25b16400aec83e5ba56a18d5913094de50983d474f6ee0c59f13762e0efb16f74a2b83be6c8a31702f77adadc08eeaeaac8cfd0fee2d313170f7a64bfae673a0defab0634dd714303efa00eddb01b7748f6f5b", 0x78, 0x800, &(0x7f0000003000-0x10)={0x2, 0x0, @multicast1=0xe0000001, [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]}, 0x10) |
| bind$inet(r0, &(0x7f0000000000)={0x2, 0x0, @multicast1=0xe0000001, [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]}, 0x10) |
| r1 = syz_open_dev$vcsa(&(0x7f0000009000-0xb)='/dev/vcsa#\x00', 0x4, 0x200000) |
| ioctl$SNDRV_TIMER_IOCTL_PARAMS(r1, 0x40505412, &(0x7f000042f000-0x50)={0x4, 0x6, 0x4, 0x0, 0xd, [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]}) |
| [ 219.240181] RIP: strlen+0x0/0x30 RSP: ffffc90000f63728 |
| [ 219.245420] CR2: 0000000000000010 |
| [ 219.248925] ---[ end trace 72499b0f3e5056d0 ]--- |
| [ 219.253970] Kernel panic - not syncing: Fatal exception |
| [ 219.259755] Dumping ftrace buffer: |
| [ 219.263263] (ftrace buffer empty) |
| [ 219.266936] Kernel Offset: disabled |
| [ 219.270524] Rebooting in 86400 seconds.. |
