parent
f1b239df7a
commit
c1f3b73483
@ -0,0 +1,48 @@
|
||||
From 0998b38e4d61179441f90dd7e7fd6a3a8b7bd8c5 Mon Sep 17 00:00:00 2001
|
||||
From: Donatas Abraitis <donatas@opensourcerouting.org>
|
||||
Date: Wed, 31 Jul 2024 08:35:14 +0300
|
||||
Subject: [PATCH] bgpd: Check the actual remaining stream length before taking
|
||||
TLV value
|
||||
|
||||
```
|
||||
0 0xb50b9f898028 in __sanitizer_print_stack_trace (/home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/.libs/bgpd+0x368028) (BuildId: 3292703ed7958b20076550c967f879db8dc27ca7)
|
||||
1 0xb50b9f7ed8e4 in fuzzer::PrintStackTrace() (/home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/.libs/bgpd+0x2bd8e4) (BuildId: 3292703ed7958b20076550c967f879db8dc27ca7)
|
||||
2 0xb50b9f7d4d9c in fuzzer::Fuzzer::CrashCallback() (/home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/.libs/bgpd+0x2a4d9c) (BuildId: 3292703ed7958b20076550c967f879db8dc27ca7)
|
||||
3 0xe0d12d7469cc (linux-vdso.so.1+0x9cc) (BuildId: 1a77697e9d723fe22246cfd7641b140c427b7e11)
|
||||
4 0xe0d12c88f1fc in __pthread_kill_implementation nptl/pthread_kill.c:43:17
|
||||
5 0xe0d12c84a678 in gsignal signal/../sysdeps/posix/raise.c:26:13
|
||||
6 0xe0d12c83712c in abort stdlib/abort.c:79:7
|
||||
7 0xe0d12d214724 in _zlog_assert_failed /home/ubuntu/frr-public/frr_public_private-libfuzzer/lib/zlog.c:789:2
|
||||
8 0xe0d12d1285e4 in stream_get /home/ubuntu/frr-public/frr_public_private-libfuzzer/lib/stream.c:324:3
|
||||
9 0xb50b9f8e47c4 in bgp_attr_encap /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_attr.c:2758:3
|
||||
10 0xb50b9f8dcd38 in bgp_attr_parse /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_attr.c:3783:10
|
||||
11 0xb50b9faf74b4 in bgp_update_receive /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_packet.c:2383:20
|
||||
12 0xb50b9faf1dcc in bgp_process_packet /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_packet.c:4075:11
|
||||
13 0xb50b9f8c90d0 in LLVMFuzzerTestOneInput /home/ubuntu/frr-public/frr_public_private-libfuzzer/bgpd/bgp_main.c:582:3
|
||||
```
|
||||
|
||||
Reported-by: Iggy Frankovic <iggyfran@amazon.com>
|
||||
Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
|
||||
---
|
||||
bgpd/bgp_attr.c | 8 ++++++++
|
||||
1 file changed, 8 insertions(+)
|
||||
|
||||
diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c
|
||||
index 2ed49935e52b..ac5d08b6fe6e 100644
|
||||
--- a/bgpd/bgp_attr.c
|
||||
+++ b/bgpd/bgp_attr.c
|
||||
@@ -2749,6 +2749,14 @@ static int bgp_attr_encap(struct bgp_attr_parser_args *args)
|
||||
args->total);
|
||||
}
|
||||
|
||||
+ if (STREAM_READABLE(BGP_INPUT(peer)) < sublength) {
|
||||
+ zlog_err("Tunnel Encap attribute sub-tlv length %d exceeds remaining stream length %zu",
|
||||
+ sublength, STREAM_READABLE(BGP_INPUT(peer)));
|
||||
+ return bgp_attr_malformed(args,
|
||||
+ BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
|
||||
+ args->total);
|
||||
+ }
|
||||
+
|
||||
/* alloc and copy sub-tlv */
|
||||
/* TBD make sure these are freed when attributes are released */
|
||||
tlv = XCALLOC(MTYPE_ENCAP_TLV,
|
Loading…
Reference in new issue