Date: Mon, 08 Jun 2026 22:50:07 +0000 From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 2ff705f32a20 - main - libalias: Serialize updates to the global instance list Message-ID: <6a27471f.24e07.100f034b@gitrepo.freebsd.org>
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The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=2ff705f32a2033201a8f83f1ade5ddbc0460387d commit 2ff705f32a2033201a8f83f1ade5ddbc0460387d Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2026-06-08 22:46:32 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2026-06-08 22:49:51 +0000 libalias: Serialize updates to the global instance list libalias maintains a global list of all libalias handles. The list was updated without any locking, but nothing prevents updates from running concurrently. MFC after: 1 week --- sys/netinet/libalias/alias_db.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/sys/netinet/libalias/alias_db.c b/sys/netinet/libalias/alias_db.c index 41f0a328daec..bc567ad2d918 100644 --- a/sys/netinet/libalias/alias_db.c +++ b/sys/netinet/libalias/alias_db.c @@ -33,6 +33,7 @@ #include <sys/systm.h> #include <sys/lock.h> #include <sys/module.h> +#include <sys/mutex.h> #include <sys/rwlock.h> #include <sys/stdarg.h> #include <sys/syslog.h> @@ -61,6 +62,10 @@ #include "alias_db.h" +#ifdef _KERNEL +static struct mtx list_mtx; +MTX_SYSINIT(libalias_list, &list_mtx, "libalias list lock", MTX_DEF); +#endif static LIST_HEAD(, libalias) instancehead = LIST_HEAD_INITIALIZER(instancehead); int LibAliasTime; @@ -2190,8 +2195,14 @@ LibAliasInit(struct libalias *la) /* kernel cleans up on module unload */ if (LIST_EMPTY(&instancehead)) atexit(finishoff); +#endif +#ifdef _KERNEL + mtx_lock(&list_mtx); #endif LIST_INSERT_HEAD(&instancehead, la, instancelist); +#ifdef _KERNEL + mtx_unlock(&list_mtx); +#endif #ifdef _KERNEL LibAliasTime = time_uptime; @@ -2259,8 +2270,14 @@ LibAliasUninit(struct libalias *la) UninitPacketAliasLog(la); #ifndef NO_FW_PUNCH UninitPunchFW(la); +#endif +#ifdef _KERNEL + mtx_lock(&list_mtx); #endif LIST_REMOVE(la, instancelist); +#ifdef _KERNEL + mtx_unlock(&list_mtx); +#endif LIBALIAS_UNLOCK(la); LIBALIAS_LOCK_DESTROY(la); free(la);home | help
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