diff options
Diffstat (limited to 'meta/recipes-core/util-linux/util-linux/CVE-2016-5011_p2.patch')
-rw-r--r-- | meta/recipes-core/util-linux/util-linux/CVE-2016-5011_p2.patch | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/meta/recipes-core/util-linux/util-linux/CVE-2016-5011_p2.patch b/meta/recipes-core/util-linux/util-linux/CVE-2016-5011_p2.patch new file mode 100644 index 0000000000..9c6960f793 --- /dev/null +++ b/meta/recipes-core/util-linux/util-linux/CVE-2016-5011_p2.patch | |||
@@ -0,0 +1,91 @@ | |||
1 | From 50d1594c2e6142a3b51d2143c74027480df082e0 Mon Sep 17 00:00:00 2001 | ||
2 | From: Karel Zak <kzak@redhat.com> | ||
3 | Date: Tue, 12 Jul 2016 13:34:54 +0200 | ||
4 | Subject: [PATCH] libblkid: avoid non-empty recursion in EBR | ||
5 | |||
6 | This is extension to the patch 7164a1c34d18831ac61c6744ad14ce916d389b3f. | ||
7 | |||
8 | We also need to detect non-empty recursion in the EBR chain. It's | ||
9 | possible to create standard valid logical partitions and in the last one | ||
10 | points back to the EBR chain. In this case all offsets will be non-empty. | ||
11 | |||
12 | Unfortunately, it's valid to create logical partitions that are not in | ||
13 | the "disk order" (sorted by start offset). So link somewhere back is | ||
14 | valid, but this link cannot points to already existing partition | ||
15 | (otherwise we will see recursion). | ||
16 | |||
17 | This patch forces libblkid to ignore duplicate logical partitions, the | ||
18 | duplicate chain segment is interpreted as non-data segment, after 100 | ||
19 | iterations with non-data segments it will break the loop -- no memory | ||
20 | is allocated in this case by the loop. | ||
21 | |||
22 | Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1349536 | ||
23 | References: http://seclists.org/oss-sec/2016/q3/40 | ||
24 | Signed-off-by: Karel Zak <kzak@redhat.com> | ||
25 | |||
26 | Upstream-status: Backport | ||
27 | CVE: CVE-2016-5011 patch 2 | ||
28 | Signed-off-by: Armin Kuster <akuster@mvista.com> | ||
29 | |||
30 | --- | ||
31 | libblkid/src/partitions/dos.c | 7 +++++++ | ||
32 | libblkid/src/partitions/partitions.c | 14 ++++++++++++++ | ||
33 | libblkid/src/partitions/partitions.h | 2 ++ | ||
34 | 3 files changed, 23 insertions(+) | ||
35 | |||
36 | Index: util-linux-2.26.2/libblkid/src/partitions/dos.c | ||
37 | =================================================================== | ||
38 | --- util-linux-2.26.2.orig/libblkid/src/partitions/dos.c | ||
39 | +++ util-linux-2.26.2/libblkid/src/partitions/dos.c | ||
40 | @@ -105,6 +105,13 @@ static int parse_dos_extended(blkid_prob | ||
41 | continue; | ||
42 | } | ||
43 | |||
44 | + /* Avoid recursive non-empty links, see ct_nodata counter */ | ||
45 | + if (blkid_partlist_get_partition_by_start(ls, abs_start)) { | ||
46 | + DBG(LOWPROBE, ul_debug("#%d: EBR duplicate data partition [abs start=%u] -- ignore", | ||
47 | + i + 1, abs_start)); | ||
48 | + continue; | ||
49 | + } | ||
50 | + | ||
51 | par = blkid_partlist_add_partition(ls, tab, abs_start, size); | ||
52 | if (!par) | ||
53 | return -ENOMEM; | ||
54 | Index: util-linux-2.26.2/libblkid/src/partitions/partitions.c | ||
55 | =================================================================== | ||
56 | --- util-linux-2.26.2.orig/libblkid/src/partitions/partitions.c | ||
57 | +++ util-linux-2.26.2/libblkid/src/partitions/partitions.c | ||
58 | @@ -940,6 +940,20 @@ blkid_partition blkid_partlist_get_parti | ||
59 | return &ls->parts[n]; | ||
60 | } | ||
61 | |||
62 | +blkid_partition blkid_partlist_get_partition_by_start(blkid_partlist ls, uint64_t start) | ||
63 | +{ | ||
64 | + int i, nparts; | ||
65 | + blkid_partition par; | ||
66 | + | ||
67 | + nparts = blkid_partlist_numof_partitions(ls); | ||
68 | + for (i = 0; i < nparts; i++) { | ||
69 | + par = blkid_partlist_get_partition(ls, i); | ||
70 | + if ((uint64_t) blkid_partition_get_start(par) == start) | ||
71 | + return par; | ||
72 | + } | ||
73 | + return NULL; | ||
74 | +} | ||
75 | + | ||
76 | /** | ||
77 | * blkid_partlist_get_partition_by_partno | ||
78 | * @ls: partitions list | ||
79 | Index: util-linux-2.26.2/libblkid/src/partitions/partitions.h | ||
80 | =================================================================== | ||
81 | --- util-linux-2.26.2.orig/libblkid/src/partitions/partitions.h | ||
82 | +++ util-linux-2.26.2/libblkid/src/partitions/partitions.h | ||
83 | @@ -21,6 +21,8 @@ extern int blkid_partlist_increment_part | ||
84 | |||
85 | extern blkid_partition blkid_partlist_get_parent(blkid_partlist ls); | ||
86 | |||
87 | +extern blkid_partition blkid_partlist_get_partition_by_start(blkid_partlist ls, uint64_t start); | ||
88 | + | ||
89 | extern int blkid_partitions_do_subprobe(blkid_probe pr, | ||
90 | blkid_partition parent, const struct blkid_idinfo *id); | ||
91 | |||