syzbot


general protection fault in hash_ipmark6_uadt

Status: fixed on 2020/02/18 14:31
Subsystems: netfilter
[Documentation on labels]
Fix commit: 22dad713b8a5 netfilter: ipset: avoid null deref when IPSET_ATTR_LINENO is present
First crash: 1621d, last: 1621d

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: 1 PID: 27735 Comm: syz-executor.3 Not tainted 5.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hash_ipmark6_uadt+0x20b/0x690 net/netfilter/ipset/ip_set_hash_ipmark.c:232
Code: 11 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 d0 03 00 00 4c 89 ea 8b 48 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 8e
RSP: 0018:ffffc90007a2f180 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffc90007a2f320 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff867ec1a4 RDI: ffff888060a42828
RBP: ffffc90007a2f2b8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff88808daff100
R13: 0000000000000000 R14: 1ffff92000f45e36 R15: ffffc90007a2f1e0
FS:  00007fce94a20700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb9151d58 CR3: 00000000a7daa000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip_set_utest+0x55b/0x890 net/netfilter/ipset/ip_set_core.c:1867
 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:672
 ____sys_sendmsg+0x753/0x880 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45af49
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fce94a1fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49
RDX: 0000000000000000 RSI: 0000000020000b00 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fce94a206d4
R13: 00000000004c9e62 R14: 00000000004e2f18 R15: 00000000ffffffff
Modules linked in:
---[ end trace a3cf6534dd4bc4d0 ]---
RIP: 0010:hash_ipmark6_uadt+0x20b/0x690 net/netfilter/ipset/ip_set_hash_ipmark.c:232
Code: 11 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 d0 03 00 00 4c 89 ea 8b 48 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 8e
RSP: 0018:ffffc90007a2f180 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffc90007a2f320 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff867ec1a4 RDI: ffff888060a42828
RBP: ffffc90007a2f2b8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff88808daff100
R13: 0000000000000000 R14: 1ffff92000f45e36 R15: ffffc90007a2f1e0
FS:  00007fce94a20700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb9151d58 CR3: 00000000a7daa000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/01/10 01:54 net-next-old 4a4a52d49d11 4de4e9f0 .config console log report ci-upstream-net-kasan-gce
2020/01/09 11:05 net-next-old 53ebeca24a87 ddc3e859 .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.