Date: Thu, 4 Jun 2020 16:24:13 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r361793 - head/sbin/dhclient Message-ID: <202006041624.054GODUi011668@repo.freebsd.org>
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Author: markj Date: Thu Jun 4 16:24:13 2020 New Revision: 361793 URL: https://svnweb.freebsd.org/changeset/base/361793 Log: dhclient: Fix a logic bug remove_protocol(). A logic bug in remove_protocol() meant that it would remove (leak) all structures in the list preceding the one intended for removal. PR: 245971 Submitted by: joost@jodocus.org (original version) MFC after: 1 week Modified: head/sbin/dhclient/dispatch.c Modified: head/sbin/dhclient/dispatch.c ============================================================================== --- head/sbin/dhclient/dispatch.c Thu Jun 4 16:05:24 2020 (r361792) +++ head/sbin/dhclient/dispatch.c Thu Jun 4 16:24:13 2020 (r361793) @@ -474,13 +474,16 @@ add_protocol(const char *name, int fd, void (*handler) void remove_protocol(struct protocol *proto) { - struct protocol *p, *next; + struct protocol *p, *prev; - for (p = protocols; p; p = next) { - next = p->next; + for (p = protocols, prev = NULL; p != NULL; prev = p, p = p->next) { if (p == proto) { - protocols = p->next; + if (prev == NULL) + protocols = p->next; + else + prev->next = p->next; free(p); + break; } } }
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