From 397c964fceb327fe12c6f42334b879e1887412fc Mon Sep 17 00:00:00 2001 From: Aleksandr Nogikh Date: Fri, 5 Jan 2024 17:58:50 +0100 Subject: executor: prevent netlink_send_ext with dofail=true This should never be happening during fuzzing. Otherwise we let syz-executor silently crash and restart insane number of times. --- pkg/csource/generated.go | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'pkg/csource') diff --git a/pkg/csource/generated.go b/pkg/csource/generated.go index 95820779a..dbb18a811 100644 --- a/pkg/csource/generated.go +++ b/pkg/csource/generated.go @@ -2909,6 +2909,11 @@ static void find_vf_interface(void) static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16 reply_type, int* reply_len, bool dofail) { +#if SYZ_EXECUTOR + if (in_execute_one && dofail) { + failmsg("invalid netlink_send_ext arguments", "dofail is true during syscall execution"); + } +#endif if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting) fail("nlmsg overflow/bad nesting"); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; -- cgit mrf-deployment