Date: Fri, 15 Apr 2022 14:21:30 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 421c2f93a4e0 - stable/13 - net: Fix memory leaks in lltable_calc_llheader() error paths Message-ID: <202204151421.23FELUeF062801@gitrepo.freebsd.org>
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The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=421c2f93a4e03da9c6ed36913916b15c170949e6 commit 421c2f93a4e03da9c6ed36913916b15c170949e6 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2022-04-08 15:47:25 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2022-04-15 14:21:20 +0000 net: Fix memory leaks in lltable_calc_llheader() error paths Also convert raw epoch_call() calls to lltable_free_entry() calls, no functional change intended. There's no need to asynchronously free the LLEs in that case to begin with, but we might as well use the lltable interfaces consistently. Noticed by code inspection; I believe lltable_calc_llheader() failures do not generally happen in practice. Reviewed by: bz Sponsored by: The FreeBSD Foundation (cherry picked from commit 990a6d18b0cb1eee9e18a4220150d549b9bee753) --- sys/net/if_llatbl.c | 4 +++- sys/netinet/in.c | 2 +- sys/netinet6/in6.c | 2 +- sys/netinet6/nd6.c | 4 +++- 4 files changed, 8 insertions(+), 4 deletions(-) diff --git a/sys/net/if_llatbl.c b/sys/net/if_llatbl.c index b82bc9fc104c..d2fb58974d3f 100644 --- a/sys/net/if_llatbl.c +++ b/sys/net/if_llatbl.c @@ -926,8 +926,10 @@ lla_rt_output(struct rt_msghdr *rtm, struct rt_addrinfo *info) linkhdrsize = sizeof(linkhdr); if (lltable_calc_llheader(ifp, dst->sa_family, LLADDR(dl), - linkhdr, &linkhdrsize, &lladdr_off) != 0) + linkhdr, &linkhdrsize, &lladdr_off) != 0) { + lltable_free_entry(llt, lle); return (EINVAL); + } lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, lladdr_off); if ((rtm->rtm_flags & RTF_ANNOUNCE)) diff --git a/sys/netinet/in.c b/sys/netinet/in.c index 2303a8f10aa4..92b9c229ea5b 100644 --- a/sys/netinet/in.c +++ b/sys/netinet/in.c @@ -1554,7 +1554,7 @@ in_lltable_alloc(struct lltable *llt, u_int flags, const struct sockaddr *l3addr linkhdrsize = LLE_MAX_LINKHDR; if (lltable_calc_llheader(ifp, AF_INET, IF_LLADDR(ifp), linkhdr, &linkhdrsize, &lladdr_off) != 0) { - NET_EPOCH_CALL(in_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); + in_lltable_free_entry(llt, lle); return (NULL); } lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, diff --git a/sys/netinet6/in6.c b/sys/netinet6/in6.c index 41b05ae2ca53..b0a8c1608b6c 100644 --- a/sys/netinet6/in6.c +++ b/sys/netinet6/in6.c @@ -2304,7 +2304,7 @@ in6_lltable_alloc(struct lltable *llt, u_int flags, linkhdrsize = LLE_MAX_LINKHDR; if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), linkhdr, &linkhdrsize, &lladdr_off) != 0) { - NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); + in6_lltable_free_entry(llt, lle); return (NULL); } lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, diff --git a/sys/netinet6/nd6.c b/sys/netinet6/nd6.c index 6a9e2a4fdd7c..69da61aa9c5c 100644 --- a/sys/netinet6/nd6.c +++ b/sys/netinet6/nd6.c @@ -2036,8 +2036,10 @@ nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr, if (lladdr != NULL) { linkhdrsize = sizeof(linkhdr); if (lltable_calc_llheader(ifp, AF_INET6, lladdr, - linkhdr, &linkhdrsize, &lladdr_off) != 0) + linkhdr, &linkhdrsize, &lladdr_off) != 0) { + lltable_free_entry(LLTABLE6(ifp), ln); return; + } lltable_set_entry_addr(ifp, ln, linkhdr, linkhdrsize, lladdr_off); }
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