From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.windriver.com ([147.11.1.11]) by linuxtogo.org with esmtp (Exim 4.72) (envelope-from ) id 1Tic70-0001nq-P7 for openembedded-core@lists.openembedded.org; Wed, 12 Dec 2012 03:31:57 +0100 Received: from ALA-HCA.corp.ad.wrs.com (ala-hca.corp.ad.wrs.com [147.11.189.40]) by mail.windriver.com (8.14.5/8.14.3) with ESMTP id qBC2HKdE011799 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Tue, 11 Dec 2012 18:17:20 -0800 (PST) Received: from [128.224.162.170] (128.224.162.170) by ALA-HCA.corp.ad.wrs.com (147.11.189.50) with Microsoft SMTP Server (TLS) id 14.2.318.4; Tue, 11 Dec 2012 18:17:20 -0800 Message-ID: <50C7E92F.5070704@windriver.com> Date: Wed, 12 Dec 2012 10:17:19 +0800 From: yzhu1 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: Saul Wold References: <3564> <1355220032-8914-1-git-send-email-yanjun.zhu@windriver.com> <50C783D9.2000908@linux.intel.com> In-Reply-To: <50C783D9.2000908@linux.intel.com> X-Originating-IP: [128.224.162.170] Cc: "Garman, Scott A" , openembedded-core@lists.openembedded.org Subject: Re: [PATCH 1/1] squashfs: fix CVE-2012-4025 X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Dec 2012 02:31:57 -0000 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit On 12/12/2012 03:04 AM, Saul Wold wrote: > On 12/11/2012 02:00 AM, yanjun.zhu wrote: >> From: "yanjun.zhu" >> >> CQID:WIND00366813 >> >> Reference: http://squashfs.git.sourceforge.net/git/gitweb.cgi? >> p=squashfs/squashfs;a=patch;h=8515b3d420f502c5c0236b86e2d6d7e3b23c190e >> >> Integer overflow in the queue_init function in unsquashfs.c in >> unsquashfs in Squashfs 4.2 and earlier allows remote attackers >> to execute arbitrary code via a crafted block_log field in the >> superblock of a .sqsh file, leading to a heap-based buffer overflow. >> >> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-4025 >> >> Signed-off-by: yanjun.zhu >> > > This was merged on Nov 30th, or is shit intended for danny, possibly > denzil. > > Sau! > Hi, Saul Thanks for your reply. Maybe you are mistaken. Just now I checked the latest source code. This patch is not merged. Please check it again. Thanks a lot. Zhu Yanjun >> [YOCTO #3564] >> --- >> .../patches/squashfs-4.2-fix-CVE-2012-4025.patch | 190 >> ++++++++++++++++++ >> ...dd-a-commment-and-fix-some-other-comments.patch | 38 ++++ >> .../patches/squashfs-fix-open-file-limit.patch | 215 >> +++++++++++++++++++++ >> .../squashfs-tools/squashfs-tools_4.2.bb | 3 + >> 4 files changed, 446 insertions(+) >> create mode 100644 >> meta/recipes-devtools/squashfs-tools/patches/squashfs-4.2-fix-CVE-2012-4025.patch >> create mode 100644 >> meta/recipes-devtools/squashfs-tools/patches/squashfs-add-a-commment-and-fix-some-other-comments.patch >> create mode 100644 >> meta/recipes-devtools/squashfs-tools/patches/squashfs-fix-open-file-limit.patch >> >> diff --git >> a/meta/recipes-devtools/squashfs-tools/patches/squashfs-4.2-fix-CVE-2012-4025.patch >> b/meta/recipes-devtools/squashfs-tools/patches/squashfs-4.2-fix-CVE-2012-4025.patch >> >> new file mode 100644 >> index 0000000..0dabfba >> --- /dev/null >> +++ >> b/meta/recipes-devtools/squashfs-tools/patches/squashfs-4.2-fix-CVE-2012-4025.patch >> @@ -0,0 +1,190 @@ >> +Upstream-Status: Backport >> + >> +Reference: http://squashfs.git.sourceforge.net/git/gitweb.cgi? >> +p=squashfs/squashfs;a=patch;h=8515b3d420f502c5c0236b86e2d6d7e3b23c190e >> + >> +Integer overflow in the queue_init function in unsquashfs.c in >> +unsquashfs in Squashfs 4.2 and earlier allows remote attackers >> +to execute arbitrary code via a crafted block_log field in the >> +superblock of a .sqsh file, leading to a heap-based buffer overflow. >> + >> +http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-4025 >> + >> +Signed-off-by: yanjun.zhu >> + >> +--- a/unsquashfs.c 2012-11-30 17:57:57.000000000 +0800 >> ++++ b/unsquashfs.c 2012-11-30 17:58:09.000000000 +0800 >> +@@ -33,6 +33,7 @@ >> + #include >> + #include >> + #include >> ++#include >> + >> + struct cache *fragment_cache, *data_cache; >> + struct queue *to_reader, *to_deflate, *to_writer, *from_writer; >> +@@ -138,6 +139,24 @@ void sigalrm_handler() >> + } >> + >> + >> ++int add_overflow(int a, int b) >> ++{ >> ++ return (INT_MAX - a) < b; >> ++} >> ++ >> ++ >> ++int shift_overflow(int a, int shift) >> ++{ >> ++ return (INT_MAX >> shift) < a; >> ++} >> ++ >> ++ >> ++int multiply_overflow(int a, int multiplier) >> ++{ >> ++ return (INT_MAX / multiplier) < a; >> ++} >> ++ >> ++ >> + struct queue *queue_init(int size) >> + { >> + struct queue *queue = malloc(sizeof(struct queue)); >> +@@ -145,6 +164,10 @@ struct queue *queue_init(int size) >> + if(queue == NULL) >> + EXIT_UNSQUASH("Out of memory in queue_init\n"); >> + >> ++ if(add_overflow(size, 1) || >> ++ multiply_overflow(size + 1, sizeof(void *))) >> ++ EXIT_UNSQUASH("Size too large in queue_init\n"); >> ++ >> + queue->data = malloc(sizeof(void *) * (size + 1)); >> + if(queue->data == NULL) >> + EXIT_UNSQUASH("Out of memory in queue_init\n"); >> +@@ -1948,13 +1971,30 @@ void initialise_threads(int fragment_buf >> + * allocate to_reader, to_deflate and to_writer queues. Set >> based on >> + * open file limit and cache size, unless open file limit is >> unlimited, >> + * in which case set purely based on cache limits >> ++ * >> ++ * In doing so, check that the user supplied values do not >> overflow >> ++ * a signed int >> + */ >> + if (max_files != -1) { >> ++ if(add_overflow(data_buffer_size, max_files) || >> ++ add_overflow(data_buffer_size, max_files * 2)) >> ++ EXIT_UNSQUASH("Data queue size is too large\n"); >> ++ >> + to_reader = queue_init(max_files + data_buffer_size); >> + to_deflate = queue_init(max_files + data_buffer_size); >> + to_writer = queue_init(max_files * 2 + data_buffer_size); >> + } else { >> +- int all_buffers_size = fragment_buffer_size + >> data_buffer_size; >> ++ int all_buffers_size; >> ++ >> ++ if(add_overflow(fragment_buffer_size, data_buffer_size)) >> ++ EXIT_UNSQUASH("Data and fragment queues combined are" >> ++ " too large\n"); >> ++ >> ++ all_buffers_size = fragment_buffer_size + data_buffer_size; >> ++ >> ++ if(add_overflow(all_buffers_size, all_buffers_size)) >> ++ EXIT_UNSQUASH("Data and fragment queues combined are" >> ++ " too large\n"); >> + >> + to_reader = queue_init(all_buffers_size); >> + to_deflate = queue_init(all_buffers_size); >> +@@ -2059,6 +2099,32 @@ void progress_bar(long long current, lon >> + } >> + >> + >> ++int parse_number(char *arg, int *res) >> ++{ >> ++ char *b; >> ++ long number = strtol(arg, &b, 10); >> ++ >> ++ /* check for trailing junk after number */ >> ++ if(*b != '\0') >> ++ return 0; >> ++ >> ++ /* check for strtol underflow or overflow in conversion */ >> ++ if(number == LONG_MIN || number == LONG_MAX) >> ++ return 0; >> ++ >> ++ /* reject negative numbers as invalid */ >> ++ if(number < 0) >> ++ return 0; >> ++ >> ++ /* check if long result will overflow signed int */ >> ++ if(number > INT_MAX) >> ++ return 0; >> ++ >> ++ *res = number; >> ++ return 1; >> ++} >> ++ >> ++ >> + #define VERSION() \ >> + printf("unsquashfs version 4.2 (2011/02/28)\n");\ >> + printf("copyright (C) 2011 Phillip Lougher "\ >> +@@ -2140,8 +2206,8 @@ int main(int argc, char *argv[]) >> + } else if(strcmp(argv[i], "-data-queue") == 0 || >> + strcmp(argv[i], "-da") == 0) { >> + if((++i == argc) || >> +- (data_buffer_size = strtol(argv[i], &b, >> +- 10), *b != '\0')) { >> ++ !parse_number(argv[i], >> ++ &data_buffer_size)) { >> + ERROR("%s: -data-queue missing or invalid " >> + "queue size\n", argv[0]); >> + exit(1); >> +@@ -2154,8 +2220,8 @@ int main(int argc, char *argv[]) >> + } else if(strcmp(argv[i], "-frag-queue") == 0 || >> + strcmp(argv[i], "-fr") == 0) { >> + if((++i == argc) || >> +- (fragment_buffer_size = strtol(argv[i], >> +- &b, 10), *b != '\0')) { >> ++ !parse_number(argv[i], >> ++ &fragment_buffer_size)) { >> + ERROR("%s: -frag-queue missing or invalid " >> + "queue size\n", argv[0]); >> + exit(1); >> +@@ -2280,11 +2346,39 @@ options: >> + block_log = sBlk.s.block_log; >> + >> + /* >> ++ * Sanity check block size and block log. >> ++ * >> ++ * Check they're within correct limits >> ++ */ >> ++ if(block_size > SQUASHFS_FILE_MAX_SIZE || >> ++ block_log > SQUASHFS_FILE_MAX_LOG) >> ++ EXIT_UNSQUASH("Block size or block_log too large." >> ++ " File system is corrupt.\n"); >> ++ >> ++ /* >> ++ * Check block_size and block_log match >> ++ */ >> ++ if(block_size != (1 << block_log)) >> ++ EXIT_UNSQUASH("Block size and block_log do not match." >> ++ " File system is corrupt.\n"); >> ++ >> ++ /* >> + * convert from queue size in Mbytes to queue size in >> +- * blocks >> ++ * blocks. >> ++ * >> ++ * In doing so, check that the user supplied values do not >> ++ * overflow a signed int >> + */ >> +- fragment_buffer_size <<= 20 - block_log; >> +- data_buffer_size <<= 20 - block_log; >> ++ if(shift_overflow(fragment_buffer_size, 20 - block_log)) >> ++ EXIT_UNSQUASH("Fragment queue size is too large\n"); >> ++ else >> ++ fragment_buffer_size <<= 20 - block_log; >> ++ >> ++ if(shift_overflow(data_buffer_size, 20 - block_log)) >> ++ EXIT_UNSQUASH("Data queue size is too large\n"); >> ++ else >> ++ data_buffer_size <<= 20 - block_log; >> ++ >> + initialise_threads(fragment_buffer_size, data_buffer_size); >> + >> + fragment_data = malloc(block_size); >> diff --git >> a/meta/recipes-devtools/squashfs-tools/patches/squashfs-add-a-commment-and-fix-some-other-comments.patch >> b/meta/recipes-devtools/squashfs-tools/patches/squashfs-add-a-commment-and-fix-some-other-comments.patch >> >> new file mode 100644 >> index 0000000..fa075f9 >> --- /dev/null >> +++ >> b/meta/recipes-devtools/squashfs-tools/patches/squashfs-add-a-commment-and-fix-some-other-comments.patch >> @@ -0,0 +1,38 @@ >> +Upstream-Status: Backport >> + >> +unsquashfs: add a commment and fix some other comments >> + >> +Signed-off-by: yanjun.zhu >> + >> +diff -urpN a/unsquashfs.c b/unsquashfs.c >> +--- a/unsquashfs.c 2012-11-30 15:27:14.000000000 +0800 >> ++++ b/unsquashfs.c 2012-11-30 15:27:56.000000000 +0800 >> +@@ -814,7 +814,7 @@ int write_file(struct inode *inode, char >> + >> + /* >> + * the writer thread is queued a squashfs_file structure >> describing the >> +- * file. If the file has one or more blocks or a fragments >> they are >> ++ * file. If the file has one or more blocks or a fragment >> they are >> + * queued separately (references to blocks in the cache). >> + */ >> + file->fd = file_fd; >> +@@ -838,7 +838,7 @@ int write_file(struct inode *inode, char >> + block->offset = 0; >> + block->size = i == file_end ? inode->data & (block_size - 1) : >> + block_size; >> +- if(block_list[i] == 0) /* sparse file */ >> ++ if(block_list[i] == 0) /* sparse block */ >> + block->buffer = NULL; >> + else { >> + block->buffer = cache_get(data_cache, start, >> +@@ -2161,6 +2161,10 @@ options: >> + block_size = sBlk.s.block_size; >> + block_log = sBlk.s.block_log; >> + >> ++ /* >> ++ * convert from queue size in Mbytes to queue size in >> ++ * blocks >> ++ */ >> + fragment_buffer_size <<= 20 - block_log; >> + data_buffer_size <<= 20 - block_log; >> + initialise_threads(fragment_buffer_size, data_buffer_size); >> diff --git >> a/meta/recipes-devtools/squashfs-tools/patches/squashfs-fix-open-file-limit.patch >> b/meta/recipes-devtools/squashfs-tools/patches/squashfs-fix-open-file-limit.patch >> >> new file mode 100644 >> index 0000000..c60f7b4 >> --- /dev/null >> +++ >> b/meta/recipes-devtools/squashfs-tools/patches/squashfs-fix-open-file-limit.patch >> @@ -0,0 +1,215 @@ >> +Upstream-Status: Backport >> + >> +unsquashfs: fix open file limit >> + >> +Previously Unsquashfs relied on the to_writer queue being >> +set to 1000 to limit the amount of open file read-ahead to a >> +maximum of 500. For the default process limit of 1024 open files >> +this was perhaps acceptable, but it obviously breaks if ulimit has >> +been used to set the open file limit to below 504 (this includes >> +stdin, stdout, stderr and the Squashfs filesystem being unsquashed). >> + >> +More importantly setting the to_writer queue to 1000 to limit >> +the amount of files open has always been an inherent performance >> +hit because the to_writer queue queues blocks. It limits the >> +block readhead to 1000 blocks, irrespective of how many files >> +that represents. A single file containing more than 1000 blocks >> +will still be limited to a 1000 block readahead even though the >> +data block cache typically can buffer more than this (at the >> +default data cache size of 256 Mbytes and the default block size >> +of 128 Kbytes, it can buffer 2048 blocks). Obviously the >> +caches serve more than just a read-ahead role (they also >> +cache decompressed blocks in case they're referenced later e.g. >> +by duplicate files), but the artificial limit imposed on >> +the read-ahead due to setting the to_writer queue to 1000 is >> +unnecessary. >> + >> +This commit does away with the need to limit the to_writer queue, >> +by introducing open_wait() and close_wake() calls which correctly >> +track the amount of open files. >> + >> +Signed-off-by: Phillip Lougher >> + >> +Signed-off-by: yanjun.zhu >> + >> +diff -urpN a/unsquashfs.c b/unsquashfs.c >> +--- a/unsquashfs.c 2012-11-30 15:31:29.000000000 +0800 >> ++++ b/unsquashfs.c 2012-11-30 15:32:03.000000000 +0800 >> +@@ -31,6 +31,8 @@ >> + >> + #include >> + #include >> ++#include >> ++#include >> + >> + struct cache *fragment_cache, *data_cache; >> + struct queue *to_reader, *to_deflate, *to_writer, *from_writer; >> +@@ -784,6 +786,46 @@ failure: >> + } >> + >> + >> ++pthread_mutex_t open_mutex = PTHREAD_MUTEX_INITIALIZER; >> ++pthread_cond_t open_empty = PTHREAD_COND_INITIALIZER; >> ++int open_unlimited, open_count; >> ++#define OPEN_FILE_MARGIN 10 >> ++ >> ++ >> ++void open_init(int count) >> ++{ >> ++ open_count = count; >> ++ open_unlimited = count == -1; >> ++} >> ++ >> ++ >> ++int open_wait(char *pathname, int flags, mode_t mode) >> ++{ >> ++ if (!open_unlimited) { >> ++ pthread_mutex_lock(&open_mutex); >> ++ while (open_count == 0) >> ++ pthread_cond_wait(&open_empty, &open_mutex); >> ++ open_count --; >> ++ pthread_mutex_unlock(&open_mutex); >> ++ } >> ++ >> ++ return open(pathname, flags, mode); >> ++} >> ++ >> ++ >> ++void close_wake(int fd) >> ++{ >> ++ close(fd); >> ++ >> ++ if (!open_unlimited) { >> ++ pthread_mutex_lock(&open_mutex); >> ++ open_count ++; >> ++ pthread_cond_signal(&open_empty); >> ++ pthread_mutex_unlock(&open_mutex); >> ++ } >> ++} >> ++ >> ++ >> + int write_file(struct inode *inode, char *pathname) >> + { >> + unsigned int file_fd, i; >> +@@ -794,8 +836,8 @@ int write_file(struct inode *inode, char >> + >> + TRACE("write_file: regular file, blocks %d\n", inode->blocks); >> + >> +- file_fd = open(pathname, O_CREAT | O_WRONLY | (force ? O_TRUNC >> : 0), >> +- (mode_t) inode->mode & 0777); >> ++ file_fd = open_wait(pathname, O_CREAT | O_WRONLY | >> ++ (force ? O_TRUNC : 0), (mode_t) inode->mode & 0777); >> + if(file_fd == -1) { >> + ERROR("write_file: failed to create file %s, because %s\n", >> + pathname, strerror(errno)); >> +@@ -1712,7 +1754,7 @@ void *writer(void *arg) >> + } >> + } >> + >> +- close(file_fd); >> ++ close_wake(file_fd); >> + if(failed == FALSE) >> + set_attributes(file->pathname, file->mode, file->uid, >> + file->gid, file->time, file->xattr, force); >> +@@ -1803,9 +1845,9 @@ void *progress_thread(void *arg) >> + >> + void initialise_threads(int fragment_buffer_size, int >> data_buffer_size) >> + { >> +- int i; >> ++ struct rlimit rlim; >> ++ int i, max_files, res; >> + sigset_t sigmask, old_mask; >> +- int all_buffers_size = fragment_buffer_size + data_buffer_size; >> + >> + sigemptyset(&sigmask); >> + sigaddset(&sigmask, SIGINT); >> +@@ -1841,10 +1883,86 @@ void initialise_threads(int fragment_buf >> + EXIT_UNSQUASH("Out of memory allocating thread >> descriptors\n"); >> + deflator_thread = &thread[3]; >> + >> +- to_reader = queue_init(all_buffers_size); >> +- to_deflate = queue_init(all_buffers_size); >> +- to_writer = queue_init(1000); >> ++ /* >> ++ * dimensioning the to_reader and to_deflate queues. The size of >> ++ * these queues is directly related to the amount of block >> ++ * read-ahead possible. To_reader queues block read requests to >> ++ * the reader thread and to_deflate queues block decompression >> ++ * requests to the deflate thread(s) (once the block has been >> read by >> ++ * the reader thread). The amount of read-ahead is determined by >> ++ * the combined size of the data_block and fragment caches which >> ++ * determine the total number of blocks which can be "in flight" >> ++ * at any one time (either being read or being decompressed) >> ++ * >> ++ * The maximum file open limit, however, affects the read-ahead >> ++ * possible, in that for normal sizes of the fragment and data >> block >> ++ * caches, where the incoming files have few data blocks or one >> fragment >> ++ * only, the file open limit is likely to be reached before the >> ++ * caches are full. This means the worst case sizing of the >> combined >> ++ * sizes of the caches is unlikely to ever be necessary. >> However, is is >> ++ * obvious read-ahead up to the data block cache size is always >> possible >> ++ * irrespective of the file open limit, because a single file >> could >> ++ * contain that number of blocks. >> ++ * >> ++ * Choosing the size as "file open limit + data block cache >> size" seems >> ++ * to be a reasonable estimate. We can reasonably assume the >> maximum >> ++ * likely read-ahead possible is data block cache size + one >> fragment >> ++ * per open file. >> ++ * >> ++ * dimensioning the to_writer queue. The size of this queue is >> ++ * directly related to the amount of block read-ahead possible. >> ++ * However, unlike the to_reader and to_deflate queues, this is >> ++ * complicated by the fact the to_writer queue not only contains >> ++ * entries for fragments and data_blocks but it also contains >> ++ * file entries, one per open file in the read-ahead. >> ++ * >> ++ * Choosing the size as "2 * (file open limit) + >> ++ * data block cache size" seems to be a reasonable estimate. >> ++ * We can reasonably assume the maximum likely read-ahead possible >> ++ * is data block cache size + one fragment per open file, and then >> ++ * we will have a file_entry for each open file. >> ++ */ >> ++ res = getrlimit(RLIMIT_NOFILE, &rlim); >> ++ if (res == -1) { >> ++ ERROR("failed to get open file limit! Defaulting to 1\n"); >> ++ rlim.rlim_cur = 1; >> ++ } >> ++ >> ++ if (rlim.rlim_cur != RLIM_INFINITY) { >> ++ /* >> ++ * leave OPEN_FILE_MARGIN free (rlim_cur includes fds used by >> ++ * stdin, stdout, stderr and filesystem fd >> ++ */ >> ++ if (rlim.rlim_cur <= OPEN_FILE_MARGIN) >> ++ /* no margin, use minimum possible */ >> ++ max_files = 1; >> ++ else >> ++ max_files = rlim.rlim_cur - OPEN_FILE_MARGIN; >> ++ } else >> ++ max_files = -1; >> ++ >> ++ /* set amount of available files for use by open_wait and >> close_wake */ >> ++ open_init(max_files); >> ++ >> ++ /* >> ++ * allocate to_reader, to_deflate and to_writer queues. Set >> based on >> ++ * open file limit and cache size, unless open file limit is >> unlimited, >> ++ * in which case set purely based on cache limits >> ++ */ >> ++ if (max_files != -1) { >> ++ to_reader = queue_init(max_files + data_buffer_size); >> ++ to_deflate = queue_init(max_files + data_buffer_size); >> ++ to_writer = queue_init(max_files * 2 + data_buffer_size); >> ++ } else { >> ++ int all_buffers_size = fragment_buffer_size + >> data_buffer_size; >> ++ >> ++ to_reader = queue_init(all_buffers_size); >> ++ to_deflate = queue_init(all_buffers_size); >> ++ to_writer = queue_init(all_buffers_size * 2); >> ++ } >> ++ >> + from_writer = queue_init(1); >> ++ >> + fragment_cache = cache_init(block_size, fragment_buffer_size); >> + data_cache = cache_init(block_size, data_buffer_size); >> + pthread_create(&thread[0], NULL, reader, NULL); >> diff --git >> a/meta/recipes-devtools/squashfs-tools/squashfs-tools_4.2.bb >> b/meta/recipes-devtools/squashfs-tools/squashfs-tools_4.2.bb >> index 213a700..5b3e644 100644 >> --- a/meta/recipes-devtools/squashfs-tools/squashfs-tools_4.2.bb >> +++ b/meta/recipes-devtools/squashfs-tools/squashfs-tools_4.2.bb >> @@ -14,6 +14,9 @@ SRC_URI = >> "${SOURCEFORGE_MIRROR}/squashfs/squashfs${PV}.tar.gz;name=squashfs \ >> http://downloads.sourceforge.net/sevenzip/lzma465.tar.bz2;name=lzma \ >> " >> SRC_URI += "file://squashfs-4.2-fix-CVE-2012-4024.patch \ >> + file://squashfs-add-a-commment-and-fix-some-other-comments.patch \ >> + file://squashfs-fix-open-file-limit.patch \ >> + file://squashfs-4.2-fix-CVE-2012-4025.patch \ >> " >> >> SRC_URI[squashfs.md5sum] = "1b7a781fb4cf8938842279bd3e8ee852" >>