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authorRoss Burton <ross.burton@intel.com>2018-11-29 11:42:14 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2018-12-01 11:38:36 +0000
commit572990892e22b4e31345d370053ad6f875071b59 (patch)
treedb9aa96a5435bdf1394c5b8d1ae91d69dd24af31 /meta/recipes-extended/cpio/cpio-2.12
parent28cbaf1de10bb6afb5986404912e0a3956863886 (diff)
downloadpoky-572990892e22b4e31345d370053ad6f875071b59.tar.gz
cpio: fix crash when appending to archives
The upstream fix for CVE-2016-2037 introduced a read from uninitialized memory bug when appending to an existing archive, which is an operation we perform when building an image. (From OE-Core rev: 046e3e1fca925febf47b3fdd5d4e9ee2e1fad868) Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-extended/cpio/cpio-2.12')
-rw-r--r--meta/recipes-extended/cpio/cpio-2.12/0001-Fix-segfault-with-append.patch87
1 files changed, 87 insertions, 0 deletions
diff --git a/meta/recipes-extended/cpio/cpio-2.12/0001-Fix-segfault-with-append.patch b/meta/recipes-extended/cpio/cpio-2.12/0001-Fix-segfault-with-append.patch
new file mode 100644
index 0000000000..2043c890cd
--- /dev/null
+++ b/meta/recipes-extended/cpio/cpio-2.12/0001-Fix-segfault-with-append.patch
@@ -0,0 +1,87 @@
1Upstream-Status: Submitted [bugs-cpio]
2Signed-off-by: Ross Burton <ross.burton@intel.com>
3
4From 3f0bd5a40ad0ceaee78c74a52a7166ed7f08db81 Mon Sep 17 00:00:00 2001
5From: Pavel Raiskup <praiskup@redhat.com>
6Date: Thu, 29 Nov 2018 07:03:48 +0100
7Subject: [PATCH] Fix segfault with --append
8
9The --append mode combines both process_copy_in() and
10process_copy_out() methods, each of them working with different
11(local) file_hdr->c_name buffers. So ensure that
12cpio_set_c_name() isn't using the same static variable for
13maintaining length of different buffers.
14
15Complements d36ec5f4e93130efb24fb9. Thanks to Ross Burton.
16
17* src/copyin.c (process_copy_in): Always initialize file_hdr.
18* src/copyout.c (process_copy_out): Likewise.
19* src/cpiohdr.h (cpio_file_stat): Add c_name_buflen variable.
20* src/util.c (cpio_set_c_name): Use file_hdr->c_name_buflen.
21---
22 src/copyin.c | 1 +
23 src/copyout.c | 1 +
24 src/cpiohdr.h | 1 +
25 src/util.c | 3 ++-
26 4 files changed, 5 insertions(+), 1 deletion(-)
27
28diff --git a/src/copyin.c b/src/copyin.c
29index ba887ae..767c2f8 100644
30--- a/src/copyin.c
31+++ b/src/copyin.c
32@@ -1213,6 +1213,7 @@ process_copy_in ()
33
34 newdir_umask = umask (0); /* Reset umask to preserve modes of
35 created files */
36+ memset (&file_hdr, 0, sizeof (struct cpio_file_stat));
37
38 /* Initialize the copy in. */
39 if (pattern_file_name)
40diff --git a/src/copyout.c b/src/copyout.c
41index 7532dac..fb890cb 100644
42--- a/src/copyout.c
43+++ b/src/copyout.c
44@@ -594,6 +594,7 @@ process_copy_out ()
45
46 /* Initialize the copy out. */
47 ds_init (&input_name, 128);
48+ memset (&file_hdr, 0, sizeof (struct cpio_file_stat));
49 file_hdr.c_magic = 070707;
50
51 /* Check whether the output file might be a tape. */
52diff --git a/src/cpiohdr.h b/src/cpiohdr.h
53index 588135b..cf64f3e 100644
54--- a/src/cpiohdr.h
55+++ b/src/cpiohdr.h
56@@ -127,6 +127,7 @@ struct cpio_file_stat /* Internal representation of a CPIO header */
57 uint32_t c_chksum;
58 char *c_name;
59 char *c_tar_linkname;
60+ size_t c_name_buflen;
61 };
62
63 void cpio_set_c_name(struct cpio_file_stat *file_hdr, char *name);
64diff --git a/src/util.c b/src/util.c
65index 10486dc..1256469 100644
66--- a/src/util.c
67+++ b/src/util.c
68@@ -1413,7 +1413,7 @@ set_file_times (int fd,
69 void
70 cpio_set_c_name (struct cpio_file_stat *file_hdr, char *name)
71 {
72- static size_t buflen = 0;
73+ size_t buflen = file_hdr->c_name_buflen;
74 size_t len = strlen (name) + 1;
75
76 if (buflen == 0)
77@@ -1430,6 +1430,7 @@ cpio_set_c_name (struct cpio_file_stat *file_hdr, char *name)
78 }
79
80 file_hdr->c_namesize = len;
81+ file_hdr->c_name_buflen = buflen;
82 memmove (file_hdr->c_name, name, len);
83 }
84
85--
862.11.0
87