Date: Tue, 21 Jul 2020 23:38:06 +0000 (UTC) From: Vladimir Kondratyev <wulf@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r363407 - stable/11/sys/compat/linuxkpi/common/include/linux Message-ID: <202007212338.06LNc6tN063067@repo.freebsd.org>
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Author: wulf Date: Tue Jul 21 23:38:05 2020 New Revision: 363407 URL: https://svnweb.freebsd.org/changeset/base/363407 Log: MFC 363205: linuxkpi: Ignore NULL pointers passed to string parameter of kstr(n)dup That follows Linux and fixes related drm-kmod-5.3 panic. Reviewed by: imp, hselasky Differential Revision: https://reviews.freebsd.org/D25657 Modified: stable/11/sys/compat/linuxkpi/common/include/linux/string.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/compat/linuxkpi/common/include/linux/string.h ============================================================================== --- stable/11/sys/compat/linuxkpi/common/include/linux/string.h Tue Jul 21 23:36:18 2020 (r363406) +++ stable/11/sys/compat/linuxkpi/common/include/linux/string.h Tue Jul 21 23:38:05 2020 (r363407) @@ -103,6 +103,8 @@ kstrdup(const char *string, gfp_t gfp) char *retval; size_t len; + if (string == NULL) + return (NULL); len = strlen(string) + 1; retval = kmalloc(len, gfp); if (retval != NULL) @@ -115,6 +117,8 @@ kstrndup(const char *string, size_t len, gfp_t gfp) { char *retval; + if (string == NULL) + return (NULL); retval = kmalloc(len + 1, gfp); if (retval != NULL) strncpy(retval, string, len);
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