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-rw-r--r--source/ap/dmidecode/patches/0001-Add-no-sysfs-option-description-to-h-output.patch39
-rw-r--r--source/ap/dmidecode/patches/0002-Avoid-SIGBUS-on-mmap-failure.patch74
-rw-r--r--source/ap/dmidecode/patches/0003-Fix-error-paths-in-mem_chunk.patch88
-rw-r--r--source/ap/dmidecode/patches/0004-dmidecode-Handle-OEM-specific-types-in-group-associa.patch40
-rw-r--r--source/ap/dmidecode/patches/0005-Fix-No-SMBIOS-nor-DMI-entry-point-found-on-SMBIOS3.patch63
-rw-r--r--source/ap/dmidecode/patches/0006-dmidecode-Introduce-SYS_FIRMWARE_DIR.patch31
-rw-r--r--source/ap/dmidecode/patches/0007-Let-read_file-return-the-actual-data-size.patch112
-rw-r--r--source/ap/dmidecode/patches/0008-dmidecode-Use-read_file-to-read-the-DMI-table-from-s.patch86
-rw-r--r--source/ap/dmidecode/patches/0009-dmidecode-Check-sysfs-entry-point-length.patch52
9 files changed, 585 insertions, 0 deletions
diff --git a/source/ap/dmidecode/patches/0001-Add-no-sysfs-option-description-to-h-output.patch b/source/ap/dmidecode/patches/0001-Add-no-sysfs-option-description-to-h-output.patch
new file mode 100644
index 00000000..35b02974
--- /dev/null
+++ b/source/ap/dmidecode/patches/0001-Add-no-sysfs-option-description-to-h-output.patch
@@ -0,0 +1,39 @@
+From 33b5aafc6ee6b5de9f2526fb1cf4b14d1e16e4f0 Mon Sep 17 00:00:00 2001
+From: Roy Franz <roy.franz@linaro.org>
+Date: Thu, 1 Oct 2015 08:41:43 +0200
+Subject: [PATCH 1/9] Add "--no-sysfs" option description to -h output
+
+A description of --no-sysfs was not added to the output of "-h" when
+the feature was added, so add it now.
+---
+ CHANGELOG | 4 ++++
+ dmiopt.c | 1 +
+ 2 files changed, 5 insertions(+)
+
+diff --git a/CHANGELOG b/CHANGELOG
+index f0a51a4..42d815c 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -1,3 +1,7 @@
++2015-10-01 Roy Franz <roy.franz@linaro.org>
++
++ * dmiopt.c: Add "--no-sysfs" option description to -h output.
++
+ 2015-09-03 Jean Delvare <jdelvare@suse.de>
+
+ * version.h: Set version to 3.0.
+diff --git a/dmiopt.c b/dmiopt.c
+index 0d142d2..de607f4 100644
+--- a/dmiopt.c
++++ b/dmiopt.c
+@@ -314,6 +314,7 @@ void print_help(void)
+ " -u, --dump Do not decode the entries\n"
+ " --dump-bin FILE Dump the DMI data to a binary file\n"
+ " --from-dump FILE Read the DMI data from a binary file\n"
++ " --no-sysfs Do not attempt to read DMI data from sysfs files\n"
+ " -V, --version Display the version and exit\n";
+
+ printf("%s", help);
+--
+2.6.4
+
diff --git a/source/ap/dmidecode/patches/0002-Avoid-SIGBUS-on-mmap-failure.patch b/source/ap/dmidecode/patches/0002-Avoid-SIGBUS-on-mmap-failure.patch
new file mode 100644
index 00000000..924a2ffe
--- /dev/null
+++ b/source/ap/dmidecode/patches/0002-Avoid-SIGBUS-on-mmap-failure.patch
@@ -0,0 +1,74 @@
+From c081fa410e7c466df4b3b257e7b974b71fb7f250 Mon Sep 17 00:00:00 2001
+From: Jean Delvare <jdelvare@suse.de>
+Date: Wed, 14 Oct 2015 14:37:04 +0200
+Subject: [PATCH 2/9] Avoid SIGBUS on mmap failure
+
+mmap will fail with SIGBUS if trying to map a non-existent portion of
+a file. While this should never happen with /dev/mem, it can happen if
+passing a regular file with option -d. While people should no longer
+do that, failure gracefully seems better than crashing. So check for
+the file size before calling mmap.
+
+This closes bug #46066:
+http://savannah.nongnu.org/bugs/?46066
+---
+ CHANGELOG | 6 ++++++
+ util.c | 21 +++++++++++++++++++++
+ 2 files changed, 27 insertions(+)
+
+diff --git a/CHANGELOG b/CHANGELOG
+index 42d815c..aa1c28f 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -1,3 +1,9 @@
++2015-10-14 Jean Delvare <jdelvare@suse.de>
++
++ * util.c: Avoid SIGBUS on mmap failure.
++ This fixes Savannah bug #46066:
++ https://savannah.nongnu.org/bugs/?46066
++
+ 2015-10-01 Roy Franz <roy.franz@linaro.org>
+
+ * dmiopt.c: Add "--no-sysfs" option description to -h output.
+diff --git a/util.c b/util.c
+index 8cafe5c..5795d02 100644
+--- a/util.c
++++ b/util.c
+@@ -152,6 +152,7 @@ void *mem_chunk(off_t base, size_t len, const char *devmem)
+ void *p;
+ int fd;
+ #ifdef USE_MMAP
++ struct stat statbuf;
+ off_t mmoffset;
+ void *mmp;
+ #endif
+@@ -169,6 +170,26 @@ void *mem_chunk(off_t base, size_t len, const char *devmem)
+ }
+
+ #ifdef USE_MMAP
++ if (fstat(fd, &statbuf) == -1)
++ {
++ fprintf(stderr, "%s: ", devmem);
++ perror("stat");
++ free(p);
++ return NULL;
++ }
++
++ /*
++ * mmap() will fail with SIGBUS if trying to map beyond the end of
++ * the file.
++ */
++ if (S_ISREG(statbuf.st_mode) && base + (off_t)len > statbuf.st_size)
++ {
++ fprintf(stderr, "mmap: Can't map beyond end of file %s\n",
++ devmem);
++ free(p);
++ return NULL;
++ }
++
+ #ifdef _SC_PAGESIZE
+ mmoffset = base % sysconf(_SC_PAGESIZE);
+ #else
+--
+2.6.4
+
diff --git a/source/ap/dmidecode/patches/0003-Fix-error-paths-in-mem_chunk.patch b/source/ap/dmidecode/patches/0003-Fix-error-paths-in-mem_chunk.patch
new file mode 100644
index 00000000..7b4e418e
--- /dev/null
+++ b/source/ap/dmidecode/patches/0003-Fix-error-paths-in-mem_chunk.patch
@@ -0,0 +1,88 @@
+From 458f73d58c24a7addce82bf1e8bfb8c2554ca458 Mon Sep 17 00:00:00 2001
+From: Jean Delvare <jdelvare@suse.de>
+Date: Wed, 14 Oct 2015 14:37:09 +0200
+Subject: [PATCH 3/9] Fix error paths in mem_chunk
+
+Use a common error path in function mem_chunk, to make sure it does
+not leak memory and does not leave an opened file descriptor behind,
+without duplicating the cleaning code.
+---
+ CHANGELOG | 1 +
+ util.c | 24 ++++++++++--------------
+ 2 files changed, 11 insertions(+), 14 deletions(-)
+
+diff --git a/CHANGELOG b/CHANGELOG
+index aa1c28f..c940c9f 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -3,6 +3,7 @@
+ * util.c: Avoid SIGBUS on mmap failure.
+ This fixes Savannah bug #46066:
+ https://savannah.nongnu.org/bugs/?46066
++ * util.c: Fix error paths in mem_chunk.
+
+ 2015-10-01 Roy Franz <roy.franz@linaro.org>
+
+diff --git a/util.c b/util.c
+index 5795d02..f97ac0d 100644
+--- a/util.c
++++ b/util.c
+@@ -166,7 +166,7 @@ void *mem_chunk(off_t base, size_t len, const char *devmem)
+ if ((p = malloc(len)) == NULL)
+ {
+ perror("malloc");
+- return NULL;
++ goto out;
+ }
+
+ #ifdef USE_MMAP
+@@ -174,8 +174,7 @@ void *mem_chunk(off_t base, size_t len, const char *devmem)
+ {
+ fprintf(stderr, "%s: ", devmem);
+ perror("stat");
+- free(p);
+- return NULL;
++ goto err_free;
+ }
+
+ /*
+@@ -186,8 +185,7 @@ void *mem_chunk(off_t base, size_t len, const char *devmem)
+ {
+ fprintf(stderr, "mmap: Can't map beyond end of file %s\n",
+ devmem);
+- free(p);
+- return NULL;
++ goto err_free;
+ }
+
+ #ifdef _SC_PAGESIZE
+@@ -220,19 +218,17 @@ try_read:
+ {
+ fprintf(stderr, "%s: ", devmem);
+ perror("lseek");
+- free(p);
+- return NULL;
++ goto err_free;
+ }
+
+- if (myread(fd, p, len, devmem) == -1)
+- {
+- free(p);
+- return NULL;
+- }
++ if (myread(fd, p, len, devmem) == 0)
++ goto out;
++
++err_free:
++ free(p);
++ p = NULL;
+
+-#ifdef USE_MMAP
+ out:
+-#endif
+ if (close(fd) == -1)
+ perror(devmem);
+
+--
+2.6.4
+
diff --git a/source/ap/dmidecode/patches/0004-dmidecode-Handle-OEM-specific-types-in-group-associa.patch b/source/ap/dmidecode/patches/0004-dmidecode-Handle-OEM-specific-types-in-group-associa.patch
new file mode 100644
index 00000000..fad90f3a
--- /dev/null
+++ b/source/ap/dmidecode/patches/0004-dmidecode-Handle-OEM-specific-types-in-group-associa.patch
@@ -0,0 +1,40 @@
+From 3acecbbab8ecaf3e3b324a2286e51cf9d7950ad5 Mon Sep 17 00:00:00 2001
+From: Jean Delvare <jdelvare@suse.de>
+Date: Tue, 20 Oct 2015 08:47:15 +0200
+Subject: [PATCH 4/9] dmidecode: Handle OEM-specific types in group
+ associations
+
+---
+ CHANGELOG | 5 +++++
+ dmidecode.c | 2 ++
+ 2 files changed, 7 insertions(+)
+
+diff --git a/CHANGELOG b/CHANGELOG
+index c940c9f..2aa1082 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -1,3 +1,8 @@
++2015-10-20 Jean Delvare <jdelvare@suse.de>
++
++ * dmidecode.c: Handle OEM-specific types in group associations
++ (DMI type 14).
++
+ 2015-10-14 Jean Delvare <jdelvare@suse.de>
+
+ * util.c: Avoid SIGBUS on mmap failure.
+diff --git a/dmidecode.c b/dmidecode.c
+index f41c85b..ce0511b 100644
+--- a/dmidecode.c
++++ b/dmidecode.c
+@@ -172,6 +172,8 @@ static const char *dmi_smbios_structure_type(u8 code)
+ "Management Controller Host Interface", /* 42 */
+ };
+
++ if (code >= 128)
++ return "OEM-specific";
+ if (code <= 42)
+ return type[code];
+ return out_of_spec;
+--
+2.6.4
+
diff --git a/source/ap/dmidecode/patches/0005-Fix-No-SMBIOS-nor-DMI-entry-point-found-on-SMBIOS3.patch b/source/ap/dmidecode/patches/0005-Fix-No-SMBIOS-nor-DMI-entry-point-found-on-SMBIOS3.patch
new file mode 100644
index 00000000..a0eb3789
--- /dev/null
+++ b/source/ap/dmidecode/patches/0005-Fix-No-SMBIOS-nor-DMI-entry-point-found-on-SMBIOS3.patch
@@ -0,0 +1,63 @@
+From bf7bad24ce141dab5b5acc3ffb98ce5fe4a8e0f9 Mon Sep 17 00:00:00 2001
+From: Xie XiuQi <xiexiuqi@huawei.com>
+Date: Wed, 21 Oct 2015 15:12:50 +0200
+Subject: [PATCH 5/9] Fix 'No SMBIOS nor DMI entry point found' on SMBIOS3
+
+address_from_efi may return a SMBIOS or SMBIOS3 format entry
+point, so add this condition.
+---
+ AUTHORS | 1 +
+ CHANGELOG | 4 ++++
+ dmidecode.c | 12 ++++++++++--
+ 3 files changed, 15 insertions(+), 2 deletions(-)
+
+diff --git a/AUTHORS b/AUTHORS
+index d4badfa..ccf7fbb 100644
+--- a/AUTHORS
++++ b/AUTHORS
+@@ -19,6 +19,7 @@ Jarod Wilson <jarod@redhat.com>
+ Anton Arapov <anton@redhat.com>
+ Roy Franz <roy.franz@linaro.org>
+ Tyler Bell <tyler.bell@hp.com>
++Xie XiuQi <xiexiuqi@huawei.com>
+
+ MANY THANKS TO (IN CHRONOLOGICAL ORDER)
+ Werner Heuser
+diff --git a/CHANGELOG b/CHANGELOG
+index 2aa1082..be2092a 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -1,3 +1,7 @@
++2015-10-21 Xie XiuQi <xiexiuqi@huawei.com>
++
++ * dmidecode.c: Handle SMBIOS 3.0 entry points on EFI systems.
++
+ 2015-10-20 Jean Delvare <jdelvare@suse.de>
+
+ * dmidecode.c: Handle OEM-specific types in group associations
+diff --git a/dmidecode.c b/dmidecode.c
+index ce0511b..cfcade4 100644
+--- a/dmidecode.c
++++ b/dmidecode.c
+@@ -4866,8 +4866,16 @@ int main(int argc, char * const argv[])
+ goto exit_free;
+ }
+
+- if (smbios_decode(buf, opt.devmem, 0))
+- found++;
++ if (memcmp(buf, "_SM3_", 5) == 0)
++ {
++ if (smbios3_decode(buf, opt.devmem, 0))
++ found++;
++ }
++ else if (memcmp(buf, "_SM_", 4) == 0)
++ {
++ if (smbios_decode(buf, opt.devmem, 0))
++ found++;
++ }
+ goto done;
+
+ memory_scan:
+--
+2.6.4
+
diff --git a/source/ap/dmidecode/patches/0006-dmidecode-Introduce-SYS_FIRMWARE_DIR.patch b/source/ap/dmidecode/patches/0006-dmidecode-Introduce-SYS_FIRMWARE_DIR.patch
new file mode 100644
index 00000000..8e03c89e
--- /dev/null
+++ b/source/ap/dmidecode/patches/0006-dmidecode-Introduce-SYS_FIRMWARE_DIR.patch
@@ -0,0 +1,31 @@
+From 2330b708a6d57fd2b8b7e353dd64d037f980a042 Mon Sep 17 00:00:00 2001
+From: Jean Delvare <jdelvare@suse.de>
+Date: Mon, 2 Nov 2015 09:45:13 +0100
+Subject: [PATCH 6/9] dmidecode: Introduce SYS_FIRMWARE_DIR
+
+Have SYS_FIRMWARE_DIR point to the sysfs directory where our files
+live, and use it in the definition of their paths. This makes it
+easier to temporarily point somewhere else for debugging.
+---
+ dmidecode.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/dmidecode.c b/dmidecode.c
+index cfcade4..183ced4 100644
+--- a/dmidecode.c
++++ b/dmidecode.c
+@@ -74,8 +74,9 @@ static const char *bad_index = "<BAD INDEX>";
+ #define FLAG_NO_FILE_OFFSET (1 << 0)
+ #define FLAG_STOP_AT_EOT (1 << 1)
+
+-#define SYS_ENTRY_FILE "/sys/firmware/dmi/tables/smbios_entry_point"
+-#define SYS_TABLE_FILE "/sys/firmware/dmi/tables/DMI"
++#define SYS_FIRMWARE_DIR "/sys/firmware/dmi/tables"
++#define SYS_ENTRY_FILE SYS_FIRMWARE_DIR "/smbios_entry_point"
++#define SYS_TABLE_FILE SYS_FIRMWARE_DIR "/DMI"
+
+ /*
+ * Type-independant Stuff
+--
+2.6.4
+
diff --git a/source/ap/dmidecode/patches/0007-Let-read_file-return-the-actual-data-size.patch b/source/ap/dmidecode/patches/0007-Let-read_file-return-the-actual-data-size.patch
new file mode 100644
index 00000000..22e2f724
--- /dev/null
+++ b/source/ap/dmidecode/patches/0007-Let-read_file-return-the-actual-data-size.patch
@@ -0,0 +1,112 @@
+From de9a74e1c60210bee229fcf55b1678a99d1b44dd Mon Sep 17 00:00:00 2001
+From: Jean Delvare <jdelvare@suse.de>
+Date: Mon, 2 Nov 2015 09:45:26 +0100
+Subject: [PATCH 7/9] Let read_file return the actual data size
+
+Let read_file return the actual data size to the caller. This gives
+the caller the possibility to check that the data size is as expected
+and large enough for the purpose, and report to the user if not.
+---
+ CHANGELOG | 5 +++++
+ dmidecode.c | 4 +++-
+ util.c | 11 +++++++----
+ util.h | 2 +-
+ 4 files changed, 16 insertions(+), 6 deletions(-)
+
+diff --git a/CHANGELOG b/CHANGELOG
+index be2092a..1e5437a 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -1,3 +1,8 @@
++2015-11-02 Jean Delvare <jdelvare@suse.de>
++
++ * dmidecode.c, util.c, util.h: Let read_file return the actual data
++ size.
++
+ 2015-10-21 Xie XiuQi <xiexiuqi@huawei.com>
+
+ * dmidecode.c: Handle SMBIOS 3.0 entry points on EFI systems.
+diff --git a/dmidecode.c b/dmidecode.c
+index 183ced4..a43cfd1 100644
+--- a/dmidecode.c
++++ b/dmidecode.c
+@@ -4751,6 +4751,7 @@ int main(int argc, char * const argv[])
+ int ret = 0; /* Returned value */
+ int found = 0;
+ off_t fp;
++ size_t size;
+ int efi;
+ u8 *buf;
+
+@@ -4820,8 +4821,9 @@ int main(int argc, char * const argv[])
+ * contain one of several types of entry points, so read enough for
+ * the largest one, then determine what type it contains.
+ */
++ size = 0x20;
+ if (!(opt.flags & FLAG_NO_SYSFS)
+- && (buf = read_file(0x20, SYS_ENTRY_FILE)) != NULL)
++ && (buf = read_file(&size, SYS_ENTRY_FILE)) != NULL)
+ {
+ if (!(opt.flags & FLAG_QUIET))
+ printf("Getting SMBIOS data from sysfs.\n");
+diff --git a/util.c b/util.c
+index f97ac0d..52ed413 100644
+--- a/util.c
++++ b/util.c
+@@ -94,10 +94,11 @@ int checksum(const u8 *buf, size_t len)
+ * needs to be freed by the caller.
+ * This provides a similar usage model to mem_chunk()
+ *
+- * Returns pointer to buffer of max_len bytes, or NULL on error
++ * Returns pointer to buffer of max_len bytes, or NULL on error, and
++ * sets max_len to the length actually read.
+ *
+ */
+-void *read_file(size_t max_len, const char *filename)
++void *read_file(size_t *max_len, const char *filename)
+ {
+ int fd;
+ size_t r2 = 0;
+@@ -115,7 +116,7 @@ void *read_file(size_t max_len, const char *filename)
+ return(NULL);
+ }
+
+- if ((p = malloc(max_len)) == NULL)
++ if ((p = malloc(*max_len)) == NULL)
+ {
+ perror("malloc");
+ return NULL;
+@@ -123,7 +124,7 @@ void *read_file(size_t max_len, const char *filename)
+
+ do
+ {
+- r = read(fd, p + r2, max_len - r2);
++ r = read(fd, p + r2, *max_len - r2);
+ if (r == -1)
+ {
+ if (errno != EINTR)
+@@ -140,6 +141,8 @@ void *read_file(size_t max_len, const char *filename)
+ while (r != 0);
+
+ close(fd);
++ *max_len = r2;
++
+ return p;
+ }
+
+diff --git a/util.h b/util.h
+index 9d409cd..b8748f1 100644
+--- a/util.h
++++ b/util.h
+@@ -25,7 +25,7 @@
+ #define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
+
+ int checksum(const u8 *buf, size_t len);
+-void *read_file(size_t len, const char *filename);
++void *read_file(size_t *len, const char *filename);
+ void *mem_chunk(off_t base, size_t len, const char *devmem);
+ int write_dump(size_t base, size_t len, const void *data, const char *dumpfile, int add);
+ u64 u64_range(u64 start, u64 end);
+--
+2.6.4
+
diff --git a/source/ap/dmidecode/patches/0008-dmidecode-Use-read_file-to-read-the-DMI-table-from-s.patch b/source/ap/dmidecode/patches/0008-dmidecode-Use-read_file-to-read-the-DMI-table-from-s.patch
new file mode 100644
index 00000000..f0dc5aed
--- /dev/null
+++ b/source/ap/dmidecode/patches/0008-dmidecode-Use-read_file-to-read-the-DMI-table-from-s.patch
@@ -0,0 +1,86 @@
+From 364055211b1956539c6a6268e111e244e1292c8c Mon Sep 17 00:00:00 2001
+From: Jean Delvare <jdelvare@suse.de>
+Date: Mon, 2 Nov 2015 09:45:31 +0100
+Subject: [PATCH 8/9] dmidecode: Use read_file() to read the DMI table from
+ sysfs
+
+We shouldn't use mem_chunk() to read the DMI table from sysfs. This
+will fail for SMBIOS v3 implementations which specify a maximum length
+for the table rather than its exact length. The kernel will trim the
+table to the actual length, so the DMI file will be shorter than the
+length announced in entry point.
+
+read_file() fits the bill in this case, as it deals with end of file
+nicely.
+
+This also helps with corrupted DMI tables, as the kernel will not
+export the part of the table that it wasn't able to parse, effectively
+trimming it.
+
+This fixes bug #46176:
+https://savannah.nongnu.org/bugs/?46176
+Unexpected end of file error
+---
+ CHANGELOG | 3 +++
+ dmidecode.c | 29 +++++++++++++++++++++--------
+ 2 files changed, 24 insertions(+), 8 deletions(-)
+
+diff --git a/CHANGELOG b/CHANGELOG
+index 1e5437a..fcfc244 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -2,6 +2,9 @@
+
+ * dmidecode.c, util.c, util.h: Let read_file return the actual data
+ size.
++ * dmidecode.c: Use read_file to read the DMI table from sysfs.
++ This fixes Savannah bug #46176:
++ https://savannah.nongnu.org/bugs/?46176
+
+ 2015-10-21 Xie XiuQi <xiexiuqi@huawei.com>
+
+diff --git a/dmidecode.c b/dmidecode.c
+index a43cfd1..16d1823 100644
+--- a/dmidecode.c
++++ b/dmidecode.c
+@@ -4524,16 +4524,29 @@ static void dmi_table(off_t base, u32 len, u16 num, u16 ver, const char *devmem,
+ printf("\n");
+ }
+
+- /*
+- * When we are reading the DMI table from sysfs, we want to print
+- * the address of the table (done above), but the offset of the
+- * data in the file is 0. When reading from /dev/mem, the offset
+- * in the file is the address.
+- */
+ if (flags & FLAG_NO_FILE_OFFSET)
+- base = 0;
++ {
++ /*
++ * When reading from sysfs, the file may be shorter than
++ * announced. For SMBIOS v3 this is expcted, as we only know
++ * the maximum table size, not the actual table size. For older
++ * implementations (and for SMBIOS v3 too), this would be the
++ * result of the kernel truncating the table on parse error.
++ */
++ size_t size = len;
++ buf = read_file(&size, devmem);
++ if (!(opt.flags & FLAG_QUIET) && num && size != (size_t)len)
++ {
++ printf("Wrong DMI structures length: %u bytes "
++ "announced, only %lu bytes available.\n",
++ len, (unsigned long)size);
++ }
++ len = size;
++ }
++ else
++ buf = mem_chunk(base, len, devmem);
+
+- if ((buf = mem_chunk(base, len, devmem)) == NULL)
++ if (buf == NULL)
+ {
+ fprintf(stderr, "Table is unreachable, sorry."
+ #ifndef USE_MMAP
+--
+2.6.4
+
diff --git a/source/ap/dmidecode/patches/0009-dmidecode-Check-sysfs-entry-point-length.patch b/source/ap/dmidecode/patches/0009-dmidecode-Check-sysfs-entry-point-length.patch
new file mode 100644
index 00000000..6af8b322
--- /dev/null
+++ b/source/ap/dmidecode/patches/0009-dmidecode-Check-sysfs-entry-point-length.patch
@@ -0,0 +1,52 @@
+From e5c73239404931d4d1b73eb595c3802fbce74c61 Mon Sep 17 00:00:00 2001
+From: Jean Delvare <jdelvare@suse.de>
+Date: Mon, 2 Nov 2015 09:45:36 +0100
+Subject: [PATCH 9/9] dmidecode: Check sysfs entry point length
+
+Before passing the sysfs entry point data over for decoding, check
+that its length meets the expectations.
+---
+ CHANGELOG | 1 +
+ dmidecode.c | 6 +++---
+ 2 files changed, 4 insertions(+), 3 deletions(-)
+
+diff --git a/CHANGELOG b/CHANGELOG
+index fcfc244..ba61cab 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -5,6 +5,7 @@
+ * dmidecode.c: Use read_file to read the DMI table from sysfs.
+ This fixes Savannah bug #46176:
+ https://savannah.nongnu.org/bugs/?46176
++ * dmidecode.c: Check the sysfs entry point length.
+
+ 2015-10-21 Xie XiuQi <xiexiuqi@huawei.com>
+
+diff --git a/dmidecode.c b/dmidecode.c
+index 16d1823..b47c469 100644
+--- a/dmidecode.c
++++ b/dmidecode.c
+@@ -4840,17 +4840,17 @@ int main(int argc, char * const argv[])
+ {
+ if (!(opt.flags & FLAG_QUIET))
+ printf("Getting SMBIOS data from sysfs.\n");
+- if (memcmp(buf, "_SM3_", 5) == 0)
++ if (size >= 24 && memcmp(buf, "_SM3_", 5) == 0)
+ {
+ if (smbios3_decode(buf, SYS_TABLE_FILE, FLAG_NO_FILE_OFFSET))
+ found++;
+ }
+- else if (memcmp(buf, "_SM_", 4) == 0)
++ else if (size >= 31 && memcmp(buf, "_SM_", 4) == 0)
+ {
+ if (smbios_decode(buf, SYS_TABLE_FILE, FLAG_NO_FILE_OFFSET))
+ found++;
+ }
+- else if (memcmp(buf, "_DMI_", 5) == 0)
++ else if (size >= 15 && memcmp(buf, "_DMI_", 5) == 0)
+ {
+ if (legacy_decode(buf, SYS_TABLE_FILE, FLAG_NO_FILE_OFFSET))
+ found++;
+--
+2.6.4
+