Hello, On Wed, 16 May 2018, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 0b7d9978406f Merge branch 'Microsemi-Ocelot-Ethernet-switc.. > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=16e91017800000 > kernel config: https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1 > dashboard link: https://syzkaller.appspot.com/bug?extid=aac887f77319868646df > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=1665d637800000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10517107800000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+aac887f77319868646df@xxxxxxxxxxxxxxxxxxxxxxxxx > > IPVS: Unknown mcast interface: veth1_to???a???????????? > IPVS: Unknown mcast interface: veth1_to???a???????????? > IPVS: Unknown mcast interface: veth1_to???a???????????? > 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 ]--- Just to let you know that I tested a patch with the syzbot, will do more tests before submitting... Regards -- Julian Anastasov <ja@xxxxxx> -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
