syzbot


general protection fault in ctnetlink_alloc_filter

Status: fixed on 2018/11/12 21:25
Subsystems: netfilter
[Documentation on labels]
Reported-by: syzbot+e45eda8eda6e93a03959@syzkaller.appspotmail.com
Fix commit: 9306425b70bf netfilter: ctnetlink: must check mark attributes vs NULL
First crash: 2095d, last: 2090d
Discussions (3)
Title Replies (including bot) Last reply
[PATCH 00/31] Netfilter updates for net-next 53 (53) 2019/05/03 07:14
[PATCH nf-next] netfilter: ctnetlink: must check mark attributes vs NULL 3 (3) 2018/09/23 07:48
general protection fault in ctnetlink_alloc_filter 0 (1) 2018/09/20 21:04

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5551 Comm: syz-executor610 Not tainted 4.19.0-rc4-next-20180918+ #74
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:nla_get_be32 include/net/netlink.h:1082 [inline]
RIP: 0010:ctnetlink_alloc_filter+0xb9/0x200 net/netfilter/nf_conntrack_netlink.c:843
Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 57 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 40 49 8d 7d 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 06
RSP: 0018:ffff8801c48f71a0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: ffff8801d7acd580 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff864dfefd RDI: 0000000000000004
RBP: ffff8801c48f71b8 R08: ffff8801d957a180 R09: ffffed003b585b57
R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: ffff8801c48f7500
R13: 0000000000000000 R14: ffff8801d90ef2b8 R15: ffff8801d90ef291
FS:  0000000000a90880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000100 CR3: 00000001d9104000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ctnetlink_start+0x10b/0x1b0 net/netfilter/nf_conntrack_netlink.c:857
 __netlink_dump_start+0x43e/0x6f0 net/netlink/af_netlink.c:2312
 netlink_dump_start include/linux/netlink.h:213 [inline]
 ctnetlink_get_conntrack+0x777/0x9f0 net/netfilter/nf_conntrack_netlink.c:1320
 nfnetlink_rcv_msg+0xdd3/0x10c0 net/netfilter/nfnetlink.c:228
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2447
 nfnetlink_rcv+0x1c0/0x4d0 net/netfilter/nfnetlink.c:560
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:632
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2117
 __sys_sendmsg+0x11d/0x280 net/socket.c:2155
 __do_sys_sendmsg net/socket.c:2164 [inline]
 __se_sys_sendmsg net/socket.c:2162 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4400d9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff461c2298 EFLAGS: 00000213 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9
RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401960
R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 37c3db5bd5270e98 ]---
RIP: 0010:nla_get_be32 include/net/netlink.h:1082 [inline]
RIP: 0010:ctnetlink_alloc_filter+0xb9/0x200 net/netfilter/nf_conntrack_netlink.c:843
Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 57 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 40 49 8d 7d 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 06
RSP: 0018:ffff8801c48f71a0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: ffff8801d7acd580 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff864dfefd RDI: 0000000000000004
RBP: ffff8801c48f71b8 R08: ffff8801d957a180 R09: ffffed003b585b57
R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: ffff8801c48f7500
R13: 0000000000000000 R14: ffff8801d90ef2b8 R15: ffff8801d90ef291
FS:  0000000000a90880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000100 CR3: 00000001d9104000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (80):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/09/18 14:35 linux-next 3eb5358079d3 7f125108 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/09/24 05:19 linux-next 46c163a036b4 28d9ac76 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/24 02:25 linux-next 46c163a036b4 28d9ac76 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/24 00:55 linux-next 46c163a036b4 28d9ac76 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 21:48 linux-next 46c163a036b4 28d9ac76 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 17:30 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 16:22 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 14:16 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 10:03 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 07:31 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 06:18 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 04:16 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 03:00 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 01:15 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/23 00:41 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 23:02 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 21:22 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 20:02 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 18:29 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 16:30 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 15:22 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 13:36 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 12:34 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 12:30 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 12:23 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 12:14 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 10:48 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 10:14 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 10:10 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 09:32 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 08:19 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 07:30 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 03:51 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 02:55 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/22 00:04 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 21:44 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 21:03 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 19:59 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 19:02 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 18:56 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 18:42 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 15:25 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 14:44 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 12:43 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 11:16 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 11:16 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 11:14 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/18 06:39 linux-next 3eb5358079d3 7f125108 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.