libvirt/0003-virarptable-End-parsing-earlier-in-case-of-NLMSG_DON.patch
Cole Robinson 50057212b3 libvirt-10.6.0-2
Fix  on kernel 6.10 (bz #2302245)
2024-08-27 08:54:25 -04:00

47 lines
1.8 KiB
Diff

From: Martin Kletzander <mkletzan@redhat.com>
Date: Fri, 16 Aug 2024 14:02:48 +0200
Subject: [PATCH] virarptable: End parsing earlier in case of NLMSG_DONE
Content-type: text/plain
Check for the last multipart message right as the first thing. The
presumption probably was that the last message might still contain a
payload we want to parse. However that cannot be true since that would
have to be a type RTM_NEWNEIGH. This was not caught because older
kernels were note sending NLMSG_DONE and probably relied on the fact
that the parsing just stops after all the messages are walked through,
which the NLMSG_OK macro successfully did.
Resolves: https://issues.redhat.com/browse/RHEL-52449
Resolves: https://bugzilla.redhat.com/2302245
Fixes: a176d67cdfaf5b8237a7e3a80d8be0e6bdf2d8fd
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
---
src/util/virarptable.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/util/virarptable.c b/src/util/virarptable.c
index 45ee76766f..20d11f97b0 100644
--- a/src/util/virarptable.c
+++ b/src/util/virarptable.c
@@ -83,6 +83,9 @@ virArpTableGet(void)
struct ndmsg *r = NLMSG_DATA(nh);
void *addr;
+ if (nh->nlmsg_type == NLMSG_DONE)
+ break;
+
if (nh->nlmsg_len < NLMSG_SPACE(sizeof(*r))) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("wrong nlmsg len"));
@@ -97,9 +100,6 @@ virArpTableGet(void)
(!(r->ndm_state == NUD_STALE || r->ndm_state == NUD_REACHABLE)))
continue;
- if (nh->nlmsg_type == NLMSG_DONE)
- return table;
-
VIR_WARNINGS_NO_CAST_ALIGN
parse_rtattr(tb, NDA_MAX, NDA_RTA(r), NLMSG_PAYLOAD(nh, sizeof(*r)));
VIR_WARNINGS_RESET