syzbot


kernel BUG at lib/string.c:LINE! (4)

Status: fixed on 2018/06/07 13:52
Subsystems: lvs
[Documentation on labels]
Reported-by: syzbot+aac887f77319868646df@syzkaller.appspotmail.com
Fix commit: 52f96757905b ipvs: fix buffer overflow with sync daemon and service
First crash: 2169d, last: 2169d
Discussions (6)
Title Replies (including bot) Last reply
[PATCH 3.16 000/366] 3.16.60-rc1 review 370 (370) 2019/03/29 15:47
[PATCH 4.4 000/105] 4.4.139-stable review 106 (106) 2018/07/26 15:09
[PATCH 4.14 00/61] 4.14.54-stable review 57 (58) 2018/07/09 13:28
[PATCH 4.9 00/39] 4.9.110-stable review 39 (39) 2018/06/25 17:18
[PATCH 0/9] Netfilter/IPVS fixes for net 11 (11) 2018/05/29 02:39
kernel BUG at lib/string.c:LINE! (4) 1 (2) 2018/05/16 22:43
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG at lib/string.c:LINE! netfilter C 73 2388d 2403d 3/26 fixed on 2017/10/24 07:07
upstream kernel BUG at lib/string.c:LINE! (5) btrfs C done 558 1307d 1316d 15/26 fixed on 2020/10/15 08:22
upstream kernel BUG at lib/string.c:LINE! (2) rdma syz 2 2233d 2233d 4/26 fixed on 2018/03/23 18:14
upstream kernel BUG at lib/string.c:LINE! (6) netfilter C done 2 1222d 1218d 19/26 fixed on 2021/03/10 01:48
upstream kernel BUG in sg_write scsi 3 1136d 1136d 0/26 auto-closed as invalid on 2021/05/17 10:34
upstream kernel BUG at lib/string.c:LINE! (3) rdma C 5 2217d 2218d 5/26 fixed on 2018/04/06 16:37

Sample crash report:
IPVS: Unknown mcast interface: veth1_to•a‰ð“ÿ¡
IPVS: Unknown mcast interface: veth1_to•a‰ð“ÿ¡
IPVS: Unknown mcast interface: veth1_to•a‰ð“ÿ¡
detected buffer overflow in strlen
------------[ cut here ]------------
kernel BUG at lib/string.c:1052!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 373 Comm: syz-executor936 Not tainted 4.17.0-rc4+ #45
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fortify_panic+0x13/0x20 lib/string.c:1051
RSP: 0018:ffff8801c976f800 EFLAGS: 00010282
RAX: 0000000000000022 RBX: 0000000000000040 RCX: 0000000000000000
RDX: 0000000000000022 RSI: ffffffff8160f6f1 RDI: ffffed00392edef6
RBP: ffff8801c976f800 R08: ffff8801cf4c62c0 R09: ffffed003b5e4fb0
R10: ffffed003b5e4fb0 R11: ffff8801daf27d87 R12: ffff8801c976fa20
R13: ffff8801c976fae4 R14: ffff8801c976fae0 R15: 000000000000048b
FS:  00007fd99f75e700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 00000001d6843000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 strlen include/linux/string.h:270 [inline]
 strlcpy include/linux/string.h:293 [inline]
 do_ip_vs_set_ctl+0x31c/0x1d00 net/netfilter/ipvs/ip_vs_ctl.c:2388
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x7d/0xd0 net/netfilter/nf_sockopt.c:115
 ip_setsockopt+0xd8/0xf0 net/ipv4/ip_sockglue.c:1253
 udp_setsockopt+0x62/0xa0 net/ipv4/udp.c:2487
 ipv6_setsockopt+0x149/0x170 net/ipv6/ipv6_sockglue.c:917
 tcp_setsockopt+0x93/0xe0 net/ipv4/tcp.c:3057
 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3046
 __sys_setsockopt+0x1bd/0x390 net/socket.c:1903
 __do_sys_setsockopt net/socket.c:1914 [inline]
 __se_sys_setsockopt net/socket.c:1911 [inline]
 __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x447369
RSP: 002b:00007fd99f75dda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00000000006e39e4 RCX: 0000000000447369
RDX: 000000000000048b RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000018 R09: 0000000000000000
R10: 00000000200001c0 R11: 0000000000000246 R12: 00000000006e39e0
R13: 75a1ff93f0896195 R14: 6f745f3168746576 R15: 0000000000000001
Code: 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 89 df e8 d2 8f 48 fa eb de 55 48 89 fe 48 c7 c7 60 65 64 88 48 89 e5 e8 91 dd f3 f9 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41 56 
RIP: fortify_panic+0x13/0x20 lib/string.c:1051 RSP: ffff8801c976f800
---[ end trace 624046f2d9af7702 ]---

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/05/16 13:54 net-next-old 0b7d9978406f 75b2448a .config console log report syz C ci-upstream-net-kasan-gce
2018/05/16 12:57 upstream 21b9f1c7e319 75b2448a .config console log report syz ci-upstream-kasan-gce-386
* Struck through repros no longer work on HEAD.