git: b7834095749d - stable/13 - pax: Clear arcn in each read function.
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Date: Thu, 01 Aug 2024 16:46:53 UTC
The branch stable/13 has been updated by des: URL: https://cgit.FreeBSD.org/src/commit/?id=b7834095749d56d7d35871918ed371f133fcb624 commit b7834095749d56d7d35871918ed371f133fcb624 Author: Dag-Erling Smørgrav <des@FreeBSD.org> AuthorDate: 2024-07-24 20:06:44 +0000 Commit: Dag-Erling Smørgrav <des@FreeBSD.org> CommitDate: 2024-08-01 16:42:34 +0000 pax: Clear arcn in each read function. Instead of initializing individual fields to zero, clear the entire struct prior to populating it. MFC after: 1 week Sponsored by: Klara, Inc. Reviewed by: 0mp, markj Differential Revision: https://reviews.freebsd.org/D46097 (cherry picked from commit f890020d43bf2070f12ffec37bcd9579f6fb1347) --- bin/pax/cpio.c | 12 +++--------- bin/pax/tar.c | 20 ++------------------ 2 files changed, 5 insertions(+), 27 deletions(-) diff --git a/bin/pax/cpio.c b/bin/pax/cpio.c index 76edca3c6f91..0b5b95bb5ef5 100644 --- a/bin/pax/cpio.c +++ b/bin/pax/cpio.c @@ -280,13 +280,13 @@ cpio_rd(ARCHD *arcn, char *buf) */ if (cpio_id(buf, sizeof(HD_CPIO)) < 0) return(-1); + memset(arcn, 0, sizeof *arcn); hd = (HD_CPIO *)buf; /* * byte oriented cpio (posix) does not have padding! extract the octal * ascii fields from the header */ - arcn->pad = 0L; arcn->sb.st_dev = (dev_t)asc_ul(hd->c_dev, sizeof(hd->c_dev), OCT); arcn->sb.st_ino = (ino_t)asc_ul(hd->c_ino, sizeof(hd->c_ino), OCT); arcn->sb.st_mode = (mode_t)asc_ul(hd->c_mode, sizeof(hd->c_mode), OCT); @@ -315,8 +315,6 @@ cpio_rd(ARCHD *arcn, char *buf) /* * no link name to read for this file */ - arcn->ln_nlen = 0; - arcn->ln_name[0] = '\0'; return(com_rd(arcn)); } @@ -561,8 +559,8 @@ vcpio_rd(ARCHD *arcn, char *buf) return(-1); } + memset(arcn, 0, sizeof *arcn); hd = (HD_VCPIO *)buf; - arcn->pad = 0L; /* * extract the hex ascii fields from the header @@ -609,8 +607,6 @@ vcpio_rd(ARCHD *arcn, char *buf) /* * we have a valid header (not a link) */ - arcn->ln_nlen = 0; - arcn->ln_name[0] = '\0'; arcn->pad = VCPIO_PAD(arcn->sb.st_size); return(com_rd(arcn)); } @@ -857,7 +853,7 @@ bcpio_rd(ARCHD *arcn, char *buf) if (bcpio_id(buf, sizeof(HD_BCPIO)) < 0) return(-1); - arcn->pad = 0L; + memset(arcn, 0, sizeof *arcn); hd = (HD_BCPIO *)buf; if (swp_head) { /* @@ -919,8 +915,6 @@ bcpio_rd(ARCHD *arcn, char *buf) /* * we have a valid header (not a link) */ - arcn->ln_nlen = 0; - arcn->ln_name[0] = '\0'; arcn->pad = BCPIO_PAD(arcn->sb.st_size); return(com_rd(arcn)); } diff --git a/bin/pax/tar.c b/bin/pax/tar.c index cbe2dbab64f8..785dd32c4838 100644 --- a/bin/pax/tar.c +++ b/bin/pax/tar.c @@ -373,9 +373,9 @@ tar_rd(ARCHD *arcn, char *buf) */ if (tar_id(buf, BLKMULT) < 0) return(-1); + memset(arcn, 0, sizeof *arcn); arcn->org_name = arcn->name; arcn->sb.st_nlink = 1; - arcn->pat = NULL; /* * copy out the name and values in the stat buffer @@ -402,8 +402,6 @@ tar_rd(ARCHD *arcn, char *buf) * to encode this as a directory */ pt = &(arcn->name[arcn->nlen - 1]); - arcn->pad = 0; - arcn->skip = 0; switch(hd->linkflag) { case SYMTYPE: /* @@ -440,8 +438,6 @@ tar_rd(ARCHD *arcn, char *buf) arcn->type = PAX_DIR; arcn->sb.st_mode |= S_IFDIR; arcn->sb.st_nlink = 2; - arcn->ln_name[0] = '\0'; - arcn->ln_nlen = 0; break; case AREGTYPE: case REGTYPE: @@ -449,8 +445,6 @@ tar_rd(ARCHD *arcn, char *buf) /* * If we have a trailing / this is a directory and NOT a file. */ - arcn->ln_name[0] = '\0'; - arcn->ln_nlen = 0; if (*pt == '/') { /* * it is a directory, set the mode for -v printing @@ -727,10 +721,9 @@ ustar_rd(ARCHD *arcn, char *buf) */ if (ustar_id(buf, BLKMULT) < 0) return(-1); + memset(arcn, 0, sizeof *arcn); arcn->org_name = arcn->name; arcn->sb.st_nlink = 1; - arcn->pat = NULL; - arcn->nlen = 0; hd = (HD_USTAR *)buf; /* @@ -777,15 +770,6 @@ ustar_rd(ARCHD *arcn, char *buf) if (uid_name(hd->uname, &(arcn->sb.st_uid)) < 0) arcn->sb.st_uid = (uid_t)asc_ul(hd->uid, sizeof(hd->uid), OCT); - /* - * set the defaults, these may be changed depending on the file type - */ - arcn->ln_name[0] = '\0'; - arcn->ln_nlen = 0; - arcn->pad = 0; - arcn->skip = 0; - arcn->sb.st_rdev = (dev_t)0; - /* * set the mode and PAX type according to the typeflag in the header */