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authorMarius Bakke <mbakke@fastmail.com>2018-06-19 17:02:16 +0200
committerMarius Bakke <mbakke@fastmail.com>2018-06-19 17:02:16 +0200
commit0106d6b40dc0b8f1c81326e633bfa5134a446a9c (patch)
tree978cc8408f2d52a024f692a31e98cb555da95462 /gnu/packages/patches/qemu-CVE-2018-11806.patch
parent7e66e0b3e7f69e045362f9452f9b745aa850d354 (diff)
parent793a66e5fef3f562080000280c022af517aad612 (diff)
Merge branch 'master' into staging
Diffstat (limited to 'gnu/packages/patches/qemu-CVE-2018-11806.patch')
-rw-r--r--gnu/packages/patches/qemu-CVE-2018-11806.patch105
1 files changed, 105 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2018-11806.patch b/gnu/packages/patches/qemu-CVE-2018-11806.patch
new file mode 100644
index 0000000000..f021dfa747
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2018-11806.patch
@@ -0,0 +1,105 @@
+Fix CVE-2018-11806:
+
+https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg01012.html
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11806
+
+Patch copied from upstream source repository:
+
+https://git.qemu.org/?p=qemu.git;a=commitdiff;h=864036e251f54c99d31df124aad7f34f01f5344c
+
+From 864036e251f54c99d31df124aad7f34f01f5344c Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp@fedoraproject.org>
+Date: Tue, 5 Jun 2018 23:38:35 +0530
+Subject: [PATCH] slirp: correct size computation while concatenating mbuf
+
+While reassembling incoming fragmented datagrams, 'm_cat' routine
+extends the 'mbuf' buffer, if it has insufficient room. It computes
+a wrong buffer size, which leads to overwriting adjacent heap buffer
+area. Correct this size computation in m_cat.
+
+Reported-by: ZDI Disclosures <zdi-disclosures@trendmicro.com>
+Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
+Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
+---
+ slirp/mbuf.c | 11 +++++------
+ slirp/mbuf.h | 8 +++-----
+ 2 files changed, 8 insertions(+), 11 deletions(-)
+
+diff --git a/slirp/mbuf.c b/slirp/mbuf.c
+index 5ff24559fd..18cbf759a7 100644
+--- a/slirp/mbuf.c
++++ b/slirp/mbuf.c
+@@ -138,7 +138,7 @@ m_cat(struct mbuf *m, struct mbuf *n)
+ * If there's no room, realloc
+ */
+ if (M_FREEROOM(m) < n->m_len)
+- m_inc(m,m->m_size+MINCSIZE);
++ m_inc(m, m->m_len + n->m_len);
+
+ memcpy(m->m_data+m->m_len, n->m_data, n->m_len);
+ m->m_len += n->m_len;
+@@ -147,7 +147,7 @@ m_cat(struct mbuf *m, struct mbuf *n)
+ }
+
+
+-/* make m size bytes large */
++/* make m 'size' bytes large from m_data */
+ void
+ m_inc(struct mbuf *m, int size)
+ {
+@@ -158,12 +158,12 @@ m_inc(struct mbuf *m, int size)
+
+ if (m->m_flags & M_EXT) {
+ datasize = m->m_data - m->m_ext;
+- m->m_ext = g_realloc(m->m_ext, size);
++ m->m_ext = g_realloc(m->m_ext, size + datasize);
+ m->m_data = m->m_ext + datasize;
+ } else {
+ char *dat;
+ datasize = m->m_data - m->m_dat;
+- dat = g_malloc(size);
++ dat = g_malloc(size + datasize);
+ memcpy(dat, m->m_dat, m->m_size);
+
+ m->m_ext = dat;
+@@ -171,8 +171,7 @@ m_inc(struct mbuf *m, int size)
+ m->m_flags |= M_EXT;
+ }
+
+- m->m_size = size;
+-
++ m->m_size = size + datasize;
+ }
+
+
+diff --git a/slirp/mbuf.h b/slirp/mbuf.h
+index 893601ff9d..33b84485d6 100644
+--- a/slirp/mbuf.h
++++ b/slirp/mbuf.h
+@@ -33,8 +33,6 @@
+ #ifndef MBUF_H
+ #define MBUF_H
+
+-#define MINCSIZE 4096 /* Amount to increase mbuf if too small */
+-
+ /*
+ * Macros for type conversion
+ * mtod(m,t) - convert mbuf pointer to data pointer of correct type
+@@ -72,11 +70,11 @@ struct mbuf {
+ struct mbuf *m_prevpkt; /* Flags aren't used in the output queue */
+ int m_flags; /* Misc flags */
+
+- int m_size; /* Size of data */
++ int m_size; /* Size of mbuf, from m_dat or m_ext */
+ struct socket *m_so;
+
+- caddr_t m_data; /* Location of data */
+- int m_len; /* Amount of data in this mbuf */
++ caddr_t m_data; /* Current location of data */
++ int m_len; /* Amount of data in this mbuf, from m_data */
+
+ Slirp *slirp;
+ bool resolution_requested;
+--
+2.17.1
+