Backport three upstream patches related to covscan.
From d71b157c2f048f6c88bf9474743faabdc56f6015 Mon Sep 17 00:00:00 2001
From: Pavel Raiskup <praiskup@redhat.com>
Date: Fri, 23 Nov 2018 14:08:48 +0100
Subject: [PATCH] Fix use-after-free in delayed link processing (newc format)
During archiving, if some of the "delayed" hard link entries
happened to disappear on filesystem (or become unreadable) for
some reason (most probably race), the old code free()d the 'entry'
and continued with the loop; the next loop though dereferenced
'entry' and crashed the archiver.
Per report from Coverity.
---
tar/write.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/tar/write.c b/tar/write.c
index e15cc06c..c6e9fccc 100644
--- a/tar/write.c
+++ b/tar/write.c
@@ -540,8 +540,7 @@ write_archive(struct archive *a, struct bsdtar *bsdtar)
lafe_warnc(archive_errno(disk),
"%s", archive_error_string(disk));
bsdtar->return_value = 1;
- archive_entry_free(entry);
- continue;
+ goto next_entry;
}
/*
@@ -559,13 +558,13 @@ write_archive(struct archive *a, struct bsdtar *bsdtar)
bsdtar->return_value = 1;
else
archive_read_close(disk);
- archive_entry_free(entry);
- continue;
+ goto next_entry;
}
write_file(bsdtar, a, entry);
- archive_entry_free(entry);
archive_read_close(disk);
+next_entry:
+ archive_entry_free(entry);
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
}
--
2.19.1
From ecfd245fbd1b0000540c75da56ad25201d5393b4 Mon Sep 17 00:00:00 2001
From: Pavel Raiskup <praiskup@redhat.com>
Date: Fri, 23 Nov 2018 13:48:34 +0100
Subject: [PATCH] Fix a few obvious resource leaks and strcpy() misuses
Per Coverity report.
---
cpio/cpio.c | 4 +++-
libarchive/archive_acl.c | 8 ++++++--
libarchive/archive_write_set_format_iso9660.c | 4 ++--
libarchive/archive_write_set_format_mtree.c | 4 ++--
libarchive/archive_write_set_format_pax.c | 6 ++++--
libarchive/archive_write_set_format_xar.c | 8 +++++---
6 files changed, 22 insertions(+), 12 deletions(-)
diff --git a/cpio/cpio.c b/cpio/cpio.c
index 9dddf417..4fd394de 100644
--- a/cpio/cpio.c
+++ b/cpio/cpio.c
@@ -755,8 +755,10 @@ file_to_archive(struct cpio *cpio, const char *srcpath)
}
if (cpio->option_rename)
destpath = cpio_rename(destpath);
- if (destpath == NULL)
+ if (destpath == NULL) {
+ archive_entry_free(entry);
return (0);
+ }
archive_entry_copy_pathname(entry, destpath);
/*
diff --git a/libarchive/archive_acl.c b/libarchive/archive_acl.c
index 9941d2f6..6ce7ab66 100644
--- a/libarchive/archive_acl.c
+++ b/libarchive/archive_acl.c
@@ -753,8 +753,10 @@ archive_acl_to_text_w(struct archive_acl *acl, ssize_t *text_len, int flags,
append_entry_w(&wp, prefix, ap->type, ap->tag, flags,
wname, ap->permset, id);
count++;
- } else if (r < 0 && errno == ENOMEM)
+ } else if (r < 0 && errno == ENOMEM) {
+ free(ws);
return (NULL);
+ }
}
/* Add terminating character */
@@ -975,8 +977,10 @@ archive_acl_to_text_l(struct archive_acl *acl, ssize_t *text_len, int flags,
prefix = NULL;
r = archive_mstring_get_mbs_l(
&ap->name, &name, &len, sc);
- if (r != 0)
+ if (r != 0) {
+ free(s);
return (NULL);
+ }
if (count > 0)
*p++ = separator;
if (name == NULL ||
diff --git a/libarchive/archive_write_set_format_iso9660.c b/libarchive/archive_write_set_format_iso9660.c
index c0ca435d..badc88ba 100644
--- a/libarchive/archive_write_set_format_iso9660.c
+++ b/libarchive/archive_write_set_format_iso9660.c
@@ -4899,10 +4899,10 @@ isofile_gen_utility_names(struct archive_write *a, struct isofile *file)
if (p[0] == '/') {
if (p[1] == '/')
/* Convert '//' --> '/' */
- strcpy(p, p+1);
+ memmove(p, p+1, strlen(p+1) + 1);
else if (p[1] == '.' && p[2] == '/')
/* Convert '/./' --> '/' */
- strcpy(p, p+2);
+ memmove(p, p+2, strlen(p+2) + 1);
else if (p[1] == '.' && p[2] == '.' && p[3] == '/') {
/* Convert 'dir/dir1/../dir2/'
* --> 'dir/dir2/'
diff --git a/libarchive/archive_write_set_format_mtree.c b/libarchive/archive_write_set_format_mtree.c
index 493d4735..0f2431e6 100644
--- a/libarchive/archive_write_set_format_mtree.c
+++ b/libarchive/archive_write_set_format_mtree.c
@@ -1810,10 +1810,10 @@ mtree_entry_setup_filenames(struct archive_write *a, struct mtree_entry *file,
if (p[0] == '/') {
if (p[1] == '/')
/* Convert '//' --> '/' */
- strcpy(p, p+1);
+ memmove(p, p+1, strlen(p+1) + 1);
else if (p[1] == '.' && p[2] == '/')
/* Convert '/./' --> '/' */
- strcpy(p, p+2);
+ memmove(p, p+2, strlen(p+2) + 1);
else if (p[1] == '.' && p[2] == '.' && p[3] == '/') {
/* Convert 'dir/dir1/../dir2/'
* --> 'dir/dir2/'
diff --git a/libarchive/archive_write_set_format_pax.c b/libarchive/archive_write_set_format_pax.c
index 6f78c48b..5a4c45a1 100644
--- a/libarchive/archive_write_set_format_pax.c
+++ b/libarchive/archive_write_set_format_pax.c
@@ -522,11 +522,13 @@ add_pax_acl(struct archive_write *a,
ARCHIVE_ERRNO_FILE_FORMAT, "%s %s %s",
"Can't translate ", attr, " to UTF-8");
return(ARCHIVE_WARN);
- } else if (*p != '\0') {
+ }
+
+ if (*p != '\0') {
add_pax_attr(&(pax->pax_header),
attr, p);
- free(p);
}
+ free(p);
return(ARCHIVE_OK);
}
diff --git a/libarchive/archive_write_set_format_xar.c b/libarchive/archive_write_set_format_xar.c
index 495f0d44..36d4a615 100644
--- a/libarchive/archive_write_set_format_xar.c
+++ b/libarchive/archive_write_set_format_xar.c
@@ -2120,10 +2120,10 @@ file_gen_utility_names(struct archive_write *a, struct file *file)
if (p[0] == '/') {
if (p[1] == '/')
/* Convert '//' --> '/' */
- strcpy(p, p+1);
+ memmove(p, p+1, strlen(p+1) + 1);
else if (p[1] == '.' && p[2] == '/')
/* Convert '/./' --> '/' */
- strcpy(p, p+2);
+ memmove(p, p+2, strlen(p+2) + 1);
else if (p[1] == '.' && p[2] == '.' && p[3] == '/') {
/* Convert 'dir/dir1/../dir2/'
* --> 'dir/dir2/'
@@ -3169,8 +3169,10 @@ save_xattrs(struct archive_write *a, struct file *file)
checksum_update(&(xar->a_sumwrk),
xar->wbuff, size);
if (write_to_temp(a, xar->wbuff, size)
- != ARCHIVE_OK)
+ != ARCHIVE_OK) {
+ free(heap);
return (ARCHIVE_FATAL);
+ }
if (r == ARCHIVE_OK) {
xar->stream.next_out = xar->wbuff;
xar->stream.avail_out = sizeof(xar->wbuff);
--
2.19.1
From ae1d1eeee425238b71ad1331309133eb9d3b88ee Mon Sep 17 00:00:00 2001
From: Martin Matuska <martin@matuska.org>
Date: Sat, 24 Nov 2018 01:31:40 +0100
Subject: [PATCH] tar/write.c: call missing archive_read_close() in
write_archive()
---
tar/write.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tar/write.c b/tar/write.c
index c6e9fccc..09c44a3e 100644
--- a/tar/write.c
+++ b/tar/write.c
@@ -556,8 +556,7 @@ write_archive(struct archive *a, struct bsdtar *bsdtar)
"%s", archive_error_string(disk));
if (r == ARCHIVE_FATAL)
bsdtar->return_value = 1;
- else
- archive_read_close(disk);
+ archive_read_close(disk);
goto next_entry;
}
--
2.19.1