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import squashfs-tools-4.3-20.el8

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CentOS Sources 2021-03-11 08:17:09 +00:00 committed by Andrew Lukoshko
commit 5e065cf560
16 changed files with 1022 additions and 0 deletions
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SOURCES/squashfs4.3.tar.gz

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a615979db9cee82e4a934a1455577f597d290b41 SOURCES/squashfs4.3.tar.gz

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--- squashfs-tools/mksquashfs.c.orig 2014-09-13 11:08:27.352318167 -0500
+++ squashfs-tools/mksquashfs.c 2014-09-13 11:09:36.701132044 -0500
@@ -2055,7 +2055,7 @@
inline int is_fragment(struct inode_info *inode)
{
- int file_size = inode->buf.st_size;
+ off_t file_size = inode->buf.st_size;
/*
* If this block is to be compressed differently to the

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From 55f7ba830d40d438f0b0663a505e0c227fc68b6b Mon Sep 17 00:00:00 2001
From: Phillip Lougher <phillip@squashfs.org.uk>
Date: Tue, 10 Jun 2014 21:51:52 +0100
Subject: mksquashfs: fix phys mem calculation for 32-bit processes on
PAE/64-bit kernels
When adding the code to base default memory usage on physical memory
(by default use 25% of physical memory), I made an oversight. I assumed
the process would be able to address 25% of physical memory.
However, for 32-bit processes running on a PAE kernel or 64-bit kernel,
25% of physical memory can easily exceed the addressible memory for a
32-bit process, e.g. if a machine has 24 GB of physical memory, the
code would asume the process could easily use 6 GB.
A 32-bit process by definition can only address 4 GB (32-bit pointers).
But, due to the typical kernel/user-space split (1GB/3GB, or 2GB/2GB)
on PAE kernels, a 32-bit process may only be able to address 2 GB.
So, if Mksquashfs is a 32-bit application running on a PAE/64-bit kernel,
the code assumes it can address much more memory than it really can, which
means it runs out of memory.
The fix is to impose a maximum default limit on 32-bit kernels, or
otherwise to never use a value more than 25% of the address space. If
we assume the maximum address space is 2 GB, then the maximum becomes
512 MB. But, given most kernels used the 1GB/3GB split, that may be
unduely conservative, and 25% of 3 GB (756 MB) may be better. This
patch compromises on 640 MB, which is mid-way between the 512 MB and 756 MB
values. It is also the fixed default value previously used by Mksquashfs.
This patch also alters the code which imposes a maximum size. Previously
it was believed limiting to the physical memory size was adequate. But
obviously this needs to be updated to take into account a 32-bit process
may only be able to address 2 GB. In the process I've also taken the
opportunity to limit all requests to no more than 75% of physical memory.
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
diff --git a/squashfs-tools/mksquashfs.c b/squashfs-tools/mksquashfs.c
index 86f82bb..5370ecf 100644
--- a/squashfs-tools/mksquashfs.c
+++ b/squashfs-tools/mksquashfs.c
@@ -304,7 +304,7 @@ void restorefs();
struct dir_info *scan1_opendir(char *pathname, char *subpath, int depth);
void write_filesystem_tables(struct squashfs_super_block *sBlk, int nopad);
unsigned short get_checksum_mem(char *buff, int bytes);
-int get_physical_memory();
+void check_usable_phys_mem(int total_mem);
void prep_exit()
@@ -4053,11 +4053,7 @@ void initialise_threads(int readq, int fragq, int bwriteq, int fwriteq,
BAD_ERROR("Queue sizes rediculously too large\n");
total_mem += fwriteq;
- if(total_mem > get_physical_memory()) {
- ERROR("Total queue sizes larger than physical memory.\n");
- ERROR("Mksquashfs will exhaust physical memory and thrash.\n");
- BAD_ERROR("Queues too large\n");
- }
+ check_usable_phys_mem(total_mem);
/*
* convert from queue size in Mbytes to queue size in
@@ -4879,6 +4875,72 @@ int get_physical_memory()
}
+void check_usable_phys_mem(int total_mem)
+{
+ /*
+ * We want to allow users to use as much of their physical
+ * memory as they wish. However, for practical reasons there are
+ * limits which need to be imposed, to protect users from themselves
+ * and to prevent people from using Mksquashfs as a DOS attack by using
+ * all physical memory. Mksquashfs uses memory to cache data from disk
+ * to optimise performance. It is pointless to ask it to use more
+ * than 75% of physical memory, as this causes thrashing and it is thus
+ * self-defeating.
+ */
+ int mem = get_physical_memory();
+
+ mem = (mem >> 1) + (mem >> 2); /* 75% */
+
+ if(total_mem > mem) {
+ ERROR("Total memory requested is more than 75%% of physical "
+ "memory.\n");
+ ERROR("Mksquashfs uses memory to cache data from disk to "
+ "optimise performance.\n");
+ ERROR("It is pointless to ask it to use more than this amount "
+ "of memory, as this\n");
+ ERROR("causes thrashing and it is thus self-defeating.\n");
+ BAD_ERROR("Requested memory size too large\n");
+ }
+
+ if(sizeof(void *) == 4 && total_mem > 2048) {
+ /*
+ * If we're running on a kernel with PAE or on a 64-bit kernel,
+ * then the 75% physical memory limit can still easily exceed
+ * the addressable memory by this process.
+ *
+ * Due to the typical kernel/user-space split (1GB/3GB, or
+ * 2GB/2GB), we have to conservatively assume the 32-bit
+ * processes can only address 2-3GB. So refuse if the user
+ * tries to allocate more than 2GB.
+ */
+ ERROR("Total memory requested may exceed maximum "
+ "addressable memory by this process\n");
+ BAD_ERROR("Requested memory size too large\n");
+ }
+}
+
+
+int get_default_phys_mem()
+{
+ int mem = get_physical_memory() / SQUASHFS_TAKE;
+
+ if(sizeof(void *) == 4 && mem > 640) {
+ /*
+ * If we're running on a kernel with PAE or on a 64-bit kernel,
+ * the default memory usage can exceed the addressable
+ * memory by this process.
+ * Due to the typical kernel/user-space split (1GB/3GB, or
+ * 2GB/2GB), we have to conservatively assume the 32-bit
+ * processes can only address 2-3GB. So limit the default
+ * usage to 640M, which gives room for other data.
+ */
+ mem = 640;
+ }
+
+ return mem;
+}
+
+
void calculate_queue_sizes(int mem, int *readq, int *fragq, int *bwriteq,
int *fwriteq)
{
@@ -4890,7 +4952,7 @@ void calculate_queue_sizes(int mem, int *readq, int *fragq, int *bwriteq,
#define VERSION() \
- printf("mksquashfs version 4.3 (2014/05/12)\n");\
+ printf("mksquashfs version 4.3-git (2014/06/09)\n");\
printf("copyright (C) 2014 Phillip Lougher "\
"<phillip@squashfs.org.uk>\n\n"); \
printf("This program is free software; you can redistribute it and/or"\
@@ -4918,7 +4980,7 @@ int main(int argc, char *argv[])
int fragq;
int bwriteq;
int fwriteq;
- int total_mem = get_physical_memory() / SQUASHFS_TAKE;
+ int total_mem = get_default_phys_mem();
int progress = TRUE;
int force_progress = FALSE;
struct file_buffer **fragment = NULL;
--
cgit v0.10.1

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diff -Nupr a/squashfs-tools/action.c b/squashfs-tools/action.c
--- a/squashfs-tools/action.c 2014-05-09 23:54:13.000000000 -0500
+++ b/squashfs-tools/action.c 2019-04-18 10:59:53.140496887 -0500
@@ -1094,8 +1094,14 @@ static int parse_sym_mode_args(struct ac
for (i = 0; i < args; i++) {
struct mode_data *entry = parse_sym_mode_arg(argv[i]);
- if (entry == NULL)
+ if (entry == NULL) {
+ while (head) {
+ cur = head;
+ head = head->next;
+ free(cur);
+ }
return 0;
+ }
if (cur) {
cur->next = entry;
diff -Nupr a/squashfs-tools/mksquashfs.c b/squashfs-tools/mksquashfs.c
--- a/squashfs-tools/mksquashfs.c 2019-04-18 10:51:05.975460126 -0500
+++ b/squashfs-tools/mksquashfs.c 2019-04-18 11:04:16.860682497 -0500
@@ -3537,11 +3537,11 @@ void dir_scan2(struct dir_info *dir, str
char *subpath = strdup(subpathname(dir_ent));
struct dir_info *sub_dir = scan1_opendir("", subpath,
dir->depth + 1);
+ free(subpath);
if(sub_dir == NULL) {
ERROR_START("Could not create pseudo directory "
"\"%s\"", pseudo_ent->pathname);
ERROR_EXIT(", skipping...\n");
- free(subpath);
pseudo_ino --;
continue;
}
diff -Nupr a/squashfs-tools/read_fs.c b/squashfs-tools/read_fs.c
--- a/squashfs-tools/read_fs.c 2014-05-09 23:54:13.000000000 -0500
+++ b/squashfs-tools/read_fs.c 2019-04-18 11:06:32.499233451 -0500
@@ -974,7 +974,8 @@ long long read_filesystem(char *root_nam
error:
free(id_table);
- free(inode_table);
+ if (inode_table)
+ free(inode_table);
free(directory_table);
return 0;
}
diff -Nupr a/squashfs-tools/unsquash-4.c b/squashfs-tools/unsquash-4.c
--- a/squashfs-tools/unsquash-4.c 2019-04-18 10:51:05.972460124 -0500
+++ b/squashfs-tools/unsquash-4.c 2019-04-18 11:32:54.600160166 -0500
@@ -50,9 +50,11 @@ int read_fragment_table_4(long long *dir
"fragment table index\n");
fragment_table = malloc(bytes);
- if(fragment_table == NULL)
+ if(fragment_table == NULL) {
+ free(fragment_table_index);
EXIT_UNSQUASH("read_fragment_table: failed to allocate "
"fragment table\n");
+ }
res = read_fs_bytes(fd, sBlk.s.fragment_table_start,
SQUASHFS_FRAGMENT_INDEX_BYTES(sBlk.s.fragments),
@@ -60,7 +62,7 @@ int read_fragment_table_4(long long *dir
if(res == FALSE) {
ERROR("read_fragment_table: failed to read fragment table "
"index\n");
- return FALSE;
+ goto out;
}
SQUASHFS_INSWAP_FRAGMENT_INDEXES(fragment_table_index, indexes);
@@ -75,7 +77,8 @@ int read_fragment_table_4(long long *dir
if(length == FALSE) {
ERROR("read_fragment_table: failed to read fragment "
"table index\n");
- return FALSE;
+ res = FALSE;
+ goto out;
}
}
@@ -83,7 +86,10 @@ int read_fragment_table_4(long long *dir
SQUASHFS_INSWAP_FRAGMENT_ENTRY(&fragment_table[i]);
*directory_table_end = fragment_table_index[0];
- return TRUE;
+ res = TRUE;
+out:
+ free(fragment_table_index);
+ return res;
}

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@ -0,0 +1,11 @@
--- a/squashfs-tools/Makefile 2019-07-24 13:52:09.552920269 -0400
+++ b/squashfs-tools/Makefile 2019-07-24 23:52:47.839665687 -0400
@@ -107,6 +107,8 @@ XATTR_DEFAULT = 1
# End of BUILD options section #
###############################################
+EXTRA_LDFLAGS += -z now -pie
+
INCLUDEDIR = -I.
INSTALL_DIR = /usr/local/bin

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@ -0,0 +1,21 @@
--- a/squashfs-tools/mksquashfs.c 2019-08-06 11:03:34.071402614 -0400
+++ b/squashfs-tools/mksquashfs.c 2019-08-06 11:09:54.063340318 -0400
@@ -267,6 +267,7 @@ pthread_mutex_t pos_mutex = PTHREAD_MUTE
pthread_mutex_t dup_mutex = PTHREAD_MUTEX_INITIALIZER;
/* user options that control parallelisation */
+#define MAX_CPUS 256
int processors = -1;
int bwriter_size;
@@ -4124,6 +4125,10 @@ void initialise_threads(int readq, int f
#endif
}
+ /* Limit the number of processors we're going to use */
+ if(processors > MAX_CPUS)
+ processors = MAX_CPUS;
+
if(multiply_overflow(processors, 3) ||
multiply_overflow(processors * 3, sizeof(pthread_t)))
BAD_ERROR("Processors too large\n");

13
SOURCES/bz1754815.patch Normal file
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@ -0,0 +1,13 @@
--- a/squashfs-tools/mksquashfs.c
+++ b/squashfs-tools/mksquashfs.c
@@ -2447,8 +2447,8 @@ void *frag_deflator(void *arg)
write_buffer->block = bytes;
bytes += compressed_size;
fragments_outstanding --;
- pthread_mutex_unlock(&fragment_mutex);
queue_put(to_writer, write_buffer);
+ pthread_mutex_unlock(&fragment_mutex);
TRACE("Writing fragment %lld, uncompressed size %d, "
"compressed size %d\n", file_buffer->block,
file_buffer->size, compressed_size);

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@ -0,0 +1,20 @@
--- a/squashfs-tools/unsquashfs.c 2021-01-14 14:34:49.658184361 -0600
+++ b/squashfs-tools/unsquashfs.c 2021-01-14 14:50:19.604100949 -0600
@@ -822,8 +822,6 @@ int set_attributes(char *pathname, int m
{
struct utimbuf times = { time, time };
- write_xattr(pathname, xattr);
-
if(utime(pathname, &times) == -1) {
ERROR("set_attributes: failed to set time on %s, because %s\n",
pathname, strerror(errno));
@@ -846,6 +844,8 @@ int set_attributes(char *pathname, int m
return FALSE;
}
+ write_xattr(pathname, xattr);
+
return TRUE;
}

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@ -0,0 +1,29 @@
diff --git a/squashfs-tools/unsquash-4.c b/squashfs-tools/unsquash-4.c
index ecdaac796f09..2c0cf63daf67 100644
--- a/squashfs-tools/unsquash-4.c
+++ b/squashfs-tools/unsquash-4.c
@@ -31,9 +31,9 @@ static unsigned int *id_table;
int read_fragment_table_4(long long *directory_table_end)
{
int res, i;
- int bytes = SQUASHFS_FRAGMENT_BYTES(sBlk.s.fragments);
- int indexes = SQUASHFS_FRAGMENT_INDEXES(sBlk.s.fragments);
- long long fragment_table_index[indexes];
+ size_t bytes = SQUASHFS_FRAGMENT_BYTES(sBlk.s.fragments);
+ size_t indexes = SQUASHFS_FRAGMENT_INDEXES(sBlk.s.fragments);
+ long long *fragment_table_index;
TRACE("read_fragment_table: %d fragments, reading %d fragment indexes "
"from 0x%llx\n", sBlk.s.fragments, indexes,
@@ -44,6 +44,11 @@ int read_fragment_table_4(long long *directory_table_end)
return TRUE;
}
+ fragment_table_index = malloc(indexes*sizeof(long long));
+ if(fragment_table_index == NULL)
+ EXIT_UNSQUASH("read_fragment_table: failed to allocate "
+ "fragment table index\n");
+
fragment_table = malloc(bytes);
if(fragment_table == NULL)
EXIT_UNSQUASH("read_fragment_table: failed to allocate "

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@ -0,0 +1,11 @@
--- squashfs-tools/unsquash-4.c.orig 2015-06-24 14:23:22.270710744 -0500
+++ squashfs-tools/unsquash-4.c 2015-06-24 14:24:13.671243487 -0500
@@ -35,7 +35,7 @@
size_t indexes = SQUASHFS_FRAGMENT_INDEXES(sBlk.s.fragments);
long long *fragment_table_index;
- TRACE("read_fragment_table: %d fragments, reading %d fragment indexes "
+ TRACE("read_fragment_table: %u fragments, reading %zu fragment indexes "
"from 0x%llx\n", sBlk.s.fragments, indexes,
sBlk.s.fragment_table_start);

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@ -0,0 +1,33 @@
From 604b607d8ac91eb8afc0b6e3d917d5c073096103 Mon Sep 17 00:00:00 2001
From: Phillip Lougher <phillip@squashfs.org.uk>
Date: Wed, 11 Jun 2014 04:51:37 +0100
Subject: mksquashfs: ensure value does not overflow a signed int in -mem
option
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
diff --git a/squashfs-tools/mksquashfs.c b/squashfs-tools/mksquashfs.c
index 5370ecf..9676dc8 100644
--- a/squashfs-tools/mksquashfs.c
+++ b/squashfs-tools/mksquashfs.c
@@ -5193,7 +5193,16 @@ print_compressor_options:
argv[0]);
exit(1);
}
- /* convert from bytes to Mbytes */
+
+ /*
+ * convert from bytes to Mbytes, ensuring the value
+ * does not overflow a signed int
+ */
+ if(number >= (1LL << 51)) {
+ ERROR("%s: -mem invalid mem size\n", argv[0]);
+ exit(1);
+ }
+
total_mem = number / 1048576;
if(total_mem < (SQUASHFS_LOWMEM / SQUASHFS_TAKE)) {
ERROR("%s: -mem should be %d Mbytes or "
--
cgit v0.10.1

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@ -0,0 +1,22 @@
diff -Nupr squashfs4.3.orig/squashfs-tools/mksquashfs.c squashfs4.3/squashfs-tools/mksquashfs.c
--- squashfs4.3.orig/squashfs-tools/mksquashfs.c 2018-08-20 10:47:49.286289155 -0400
+++ squashfs4.3/squashfs-tools/mksquashfs.c 2018-08-20 10:49:28.348541210 -0400
@@ -35,6 +35,7 @@
#include <stddef.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/sysmacros.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
diff -Nupr squashfs4.3.orig/squashfs-tools/unsquashfs.c squashfs4.3/squashfs-tools/unsquashfs.c
--- squashfs4.3.orig/squashfs-tools/unsquashfs.c 2018-08-20 10:47:49.283289208 -0400
+++ squashfs4.3/squashfs-tools/unsquashfs.c 2018-08-20 10:58:44.238732579 -0400
@@ -35,6 +35,7 @@
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
+#include <sys/sysmacros.h>
#include <limits.h>
#include <ctype.h>

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@ -0,0 +1,146 @@
.TH MKSQUASHFS 1 "2014\-05\-13" "4.3" "create and append squashfs filesystems"
.SH NAME
mksquashfs \- tool to create and append to squashfs filesystems
.SH SYNOPSIS
\fBmksquashfs\fR \fISOURCE\fR [\fISOURCE2\fR \fI...\fR] \fIDESTINATION\fR [\fIOPTIONS\fR]
.SH DESCRIPTION
Squashfs is a highly compressed read\-only filesystem for Linux. It uses zlib compression to compress both files, inodes and directories. Inodes in the system are very small and all blocks are packed to minimize data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.
.PP
Squashfs is intended for general read\-only filesystem use, for archival use (i.e. in cases where a .tar.gz file may be used), and in constrained block device/memory systems (e.g. embedded systems) where low overhead is needed.
.SH OPTIONS
.SS Filesystem build options
.IP "\-comp \fICOMPRESSION\fR" 4
select \fICOMPRESSION\fR compression. Compressors available: gzip (default), lzma (no kernel support), lzo, lz4 and xz.
.IP "\-b \fIBLOCK_SIZE\fR"
set data block to \fIBLOCK_SIZE\fR. Default 131072 bytes. Optionally K or M can be used as a suffix to specify kilobytes or megabytes, respectively.
.IP "\-no\-exports" 4
don't make the filesystem exportable via NFS.
.IP "\-no\-sparse" 4
don't detect sparse files.
.IP "\-no\-xattrs" 4
don't store extended attributes.
.IP "\-xattrs" 4
store extended attributes (default).
.IP "\-noI" 4
do not compress inode table.
.IP "\-noD" 4
do not compress data blocks.
.IP "\-noF" 4
do not compress fragment blocks.
.IP "\-noX" 4
do not compress extended attributes.
.IP "\-no\-fragments" 4
do not use fragments.
.IP "\-always\-use\-fragments" 4
use fragment blocks for files larger than block size.
.IP "\-no\-duplicates" 4
do not perform duplicate checking.
.IP "\-all\-root" 4
make all files owned by root.
.IP "\-force\-uid uid" 4
set all file uids to uid.
.IP "\-force\-gid gid" 4
set all file gids to gid.
.IP "\-nopad" 4
do not pad filesystem to a multiple of 4K.
.IP "\-keep\-as\-directory" 4
if one source directory is specified, create a root directory containing that directory, rather than the contents of the directory.
.SS Filesystem filter options
.IP "\-p \fIPSEUDO_DEFINITION\fR" 4
Add pseudo file definition.
.IP "\-pf \fIPSEUDO_FILE\fR" 4
Add list of pseudo file definitions.
.IP "\-sort \fISORT_FILE\fR" 4
sort files according to priorities in \fISORT_FILE\fR. One file or dir with priority per line. Priority \-32768 to 32767, default priority 0.
.IP "\-ef \fIEXCLUDE_FILE\fR" 4
list of exclude dirs/files. One per line.
.IP "\-wildcards" 4
Allow extended shell wildcards (globbing) to be used in exclude dirs/files
.IP "\-regex" 4
Allow POSIX regular expressions to be used in exclude dirs/files.
.SS Filesystem append options
.IP "\-noappend" 4
do not append to existing filesystem.
.IP "\-root\-becomes \fINAME\fR" 4
when appending source files/directories, make the original root become a subdirectory in the new root called \fINAME\fR, rather than adding the new source items to the original root.
.SS Mksquashfs runtime options:
.IP "\-version" 4
print version, licence and copyright message.
.IP "\-exit\-on\-error" 4
treat normally ignored errors as fatal.
.IP "\-recover \fINAME\fR" 4
recover filesystem data using recovery file \fINAME\fR.
.IP "\-no\-recovery" 4
don't generate a recovery file.
.IP "\-info" 4
print files written to filesystem.
.IP "\-no\-progress" 4
don't display the progress bar.
.IP "\-progress" 4
display progress bar when using the \-info option.
.IP "\-processors \fINUMBER\fR" 4
Use \fINUMBER\fR processors. By default will use number of processors available.
.IP "\-mem \fISIZE\fR" 4
Use \fISIZE\fR physical memory. Optionally K or M can be used as a suffix for kilobytes or megabytes, respectively. Default 25% of memory.
.IP "\-read\-queue \fISIZE\fR" 4
Deprecated. Use \-mem instead.
.IP "\-write\-queue \fISIZE\fR" 4
Deprecated. Use \-mem instead.
.IP "\-fragment\-queue \fISIZE\fR" 4
Deprecated. Use \-mem instead.
.SS Miscellaneous options
.IP "\-root\-owned" 4
alternative name for \-all\-root.
.IP "\-noInodeCompression" 4
alternative name for \-noI.
.IP "\-noDataCompression" 4
alternative name for \-noD.
.IP "\-noFragmentCompression" 4
alternative name for \-noF.
.IP "\-noXattrCompression" 4
alternative name for \-noX.
.IP "\-Xhelp" 4
print compressor options for selected compressor
.SS Compressors available and compressor specific options
.IP "gzip (default)"
.IP "\-Xcompression-level \fIcompression\-level\fR" 4
\fIcompression\-level\fR should be 1 .. 9 (default 9)
.IP "\-Xwindow\-size \fIwindow\-size\fR" 4
\fIwindow\-size\fR should be 8 .. 15 (default 15)
.IP "\-Xstrategy strategy1,strategy2,...,strategyN" 4
Compress using strategy1,strategy2,...,strategyN in turn and choose the best compression. Available strategies: default, filtered, huffman_only, run_length_encoded and fixed
.IP "lzmz (no options) (no kernel support)" 4
.IP "lzo" 4
.IP "\-Xalgorithm \fIalgorithm\fR" 4
Where \fIalgorithm\fR is one of: lzo1x_1, lzo1x_1_11, lzo1x_1_12, lzo1x_1_15 or lzo1x_999. (default lzo1x_999)
.IP "\-Xcompression\-level \fIcompression\-level\fR" 4
\fIcompression\-level\fR should be 1 .. 9 (default 8)
.IP "lz4" 4
.IP "\-Xhc"
Compress using LZ4 High Compression
.IP "xz" 4
.IP "\-Xbcj filter1,filter2,...,filterN" 4
Compress using filter1,filter2,...,filterN in turn (in addition to no filter), and choose the best compression. Available filters: x86, arm, armthumb, powerpc, sparc, ia64.
.IP "\-Xdict\-size \fIDICT_SIZE\fR" 4
Use \fIDICT_SIZE\fR as the XZ dictionary size. The dictionary size can be specified as a percentage of the block size, or as an absolute value. The dictionary size must be less than or equal to the block size and 8192 bytes or larger. It must also be storable in the xz header as either 2^n or as 2^n+2^(n+1). Example dict\-sizes are 75%, 50%, 37.5%, 25%, or 32K, 16K, 8K etc.
.SH SEE ALSO
unsquashfs(1)
.SH HOMEPAGE
More information about mksquashfs and the squashfs filesystem can be found at <\fIhttp://squashfs.sourceforge.net/\fR>.
.SH AUTHOR
squashfs was written by Phillip Lougher <\fIplougher@users.sourceforge.net\fR>.
.PP
This manual page was written by Daniel Baumann <\fIdaniel.baumann@progress\-technologies.net\fR>. With some updates for 4.3 for use with Fedora.

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.TH UNSQUASHFS 1 "2014\-05\-13" "4.3" "uncompress squashfs filesystems"
.SH NAME
mksquashfs \- tool to uncompress squashfs filesystems
.SH SYNOPSIS
\fBunsquashfs\fR [\fIOPTIONS\fR] \fIFILESYSTEM\fR [\fIdirectories or files to extract\fR]
.SH DESCRIPTION
Squashfs is a highly compressed read\-only filesystem for Linux. It uses zlib compression to compress both files, inodes and directories. Inodes in the system are very small and all blocks are packed to minimize data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.
.PP
Squashfs is intended for general read\-only filesystem use, for archival use (i.e. in cases where a .tar.gz file may be used), and in constrained block device/memory systems (e.g. embedded systems) where low overhead is needed.
.SH OPTIONS
.IP "\-v, \-version" 4
print version, licence and copyright information.
.IP "\-d \fIPATHNAME\fR, \-dest \fIPATHNAME\fR" 4
unsquash to \fIPATHNAME\fR, default "squashfs\-root".
.IP "\-n, \-no\-progress" 4
don't display the progress bar.
.IP "\-no, \-no\-xattrs" 4
don't extract xattrs in file system.
.IP "\-x, \-xattrs" 4
extract xattrs in file system (default).
.IP "\-u, \-user\-xattrs" 4
only extract user xattrs in file system. Enables extracting xattrs.
.IP "\-p \fINUMBER\fR, \-processors \fINUMBER\fR" 4
use \fINUMBER\fR processors. By default will use number of processors available.
.IP "\-i, \-info" 4
print files as they are unsquashed.
.IP "\-li, \-linfo" 4
print files as they are unsquashed with file attributes (like ls \-l output).
.IP "\-l, \-ls" 4
list filesystem, but don't unsquash.
.IP "\-ll, \-lls" 4
list filesystem with file attributes (like ls \-l output), but don't unsquash.
.IP "\-f, \-force" 4
if file already exists then overwrite.
.IP "\-s, \-stat" 4
display filesystem superblock information.
.IP "\-e \fIEXTRACT_FILE\fR, \-ef \fIEXTRACT_FILE\fR" 4
list of directories or files to extract. One per line.
.IP "\-da \fISIZE\fR, \-data\-queue \fISIZE\fR" 4
Set data queue to \fISIZE\fR Mbytes. Default 256 Mbytes.
.IP "\-fr \fISIZE\fR, \-frag\-queue \fISIZE\fR" 4
Set fragment queue to \fISIZE\fR Mbytes. Default 256 Mbytes.
.IP "\-r, \-regex" 4
treat extract names as POSIX regular expressions rather than use the default shell wildcard expansion (globbing).
.SS Decompressors available
.IP "gzip" 4
.IP "lzma" 4
.IP "lzo" 4
.IP "lz4" 4
.IP "xz" 4
.SH SEE ALSO
mksquashfs(1)
.SH HOMEPAGE
More information about unsquashfs and the squashfs filesystem can be found at <\fIhttp://squashfs.sourceforge.net/\fR>.
.SH AUTHOR
squashfs was written by Phillip Lougher <\fIplougher@users.sourceforge.net\fR>.
.PP
This manual page was written by Daniel Baumann <\fIdaniel.baumann@progress\-technologies.net\fR>. With some updates for 4.3 for use with Fedora.

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Summary: Utility for the creation of squashfs filesystems
Name: squashfs-tools
Version: 4.3
Release: 20%{?dist}
License: GPLv2+
Group: System Environment/Base
URL: http://squashfs.sourceforge.net/
Source0: http://downloads.sourceforge.net/squashfs/squashfs%{version}.tar.gz
# manpages from http://ftp.debian.org/debian/pool/main/s/squashfs-tools/squashfs-tools_4.2+20121212-1.debian.tar.xz
# The man pages have been modified for 4.3 for Fedora.
Source1: mksquashfs.1
Source2: unsquashfs.1
# From master branch (55f7ba830d40d438f0b0663a505e0c227fc68b6b).
# 32 bit process can use too much memory when using PAE or 64 bit kernels
Patch0: PAE.patch
# From master branch (604b607d8ac91eb8afc0b6e3d917d5c073096103).
# Prevent overflows when using the -mem option.
Patch1: mem-overflow.patch
# From squashfs-devel@lists.sourceforge.net by Guan Xin <guanx.bac@gmail.com>
# For https://bugzilla.redhat.com/show_bug.cgi?id=1141206
Patch2: 2gb.patch
# From https://github.com/gcanalesb/sasquatch/commit/6777e08cc38bc780d27c69c1d8c272867b74524f
# Which is forked from Phillip's squashfs-tools, though it looks like
# the issue applies to us.
Patch3: cve-2015-4645.patch
# Update formats to match changes in cve-2015-4645.patch
Patch4: local-cve-fix.patch
# rhbz 1611746
Patch5: mksquashfs-sysmacros-fix.patch
# rhbz 1602698
Patch6: bz1602698.patch
# rhbz 1624173
Patch7: bz1624173.patch
# rhbz 1716278
Patch8: bz1716278.patch
# rhbz 1754815
Patch9: bz1754815.patch
# rhbz 1895017
Patch10: bz1895017.patch
BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
BuildRequires: zlib-devel
BuildRequires: xz-devel
BuildRequires: lzo-devel
BuildRequires: libattr-devel
BuildRequires: lz4-devel
%description
Squashfs is a highly compressed read-only filesystem for Linux. This package
contains the utilities for manipulating squashfs filesystems.
%prep
%setup -q -n squashfs%{version}
%patch0 -p1
%patch1 -p1
%patch2 -p0
%patch3 -p1
%patch4 -p0
%patch5 -p1
%patch6 -p1
%patch7 -p1
%patch8 -p1
%patch9 -p1
%patch10 -p1
%build
pushd squashfs-tools
CFLAGS="%{optflags}" XZ_SUPPORT=1 LZO_SUPPORT=1 LZMA_XZ_SUPPORT=1 LZ4_SUPPORT=1 make %{?_smp_mflags}
%install
mkdir -p %{buildroot}%{_sbindir} %{buildroot}%{_mandir}/man1
install -m 755 squashfs-tools/mksquashfs %{buildroot}%{_sbindir}/mksquashfs
install -m 755 squashfs-tools/unsquashfs %{buildroot}%{_sbindir}/unsquashfs
install -m 644 %{SOURCE1} %{buildroot}%{_mandir}/man1/mksquashfs.1
install -m 644 %{SOURCE2} %{buildroot}%{_mandir}/man1/unsquashfs.1
%clean
rm -rf %{buildroot}
%files
%defattr(-,root,root,-)
%doc README ACKNOWLEDGEMENTS DONATIONS PERFORMANCE.README README-4.3 CHANGES pseudo-file.example COPYING
%doc README
%{_mandir}/man1/*
%{_sbindir}/mksquashfs
%{_sbindir}/unsquashfs
%changelog
* Thu Feb 25 2021 Abhi Das <adas@redhat.com> - 4.3-20
- rhbz#1895017 - unsquashfs does not preserve file capabilities
rhbz#1754815 - Kdump: Building kdump initramfs img may fail with 'dracut: Failed making squash image' occasionally
Resolves: rhbz#1895017, rhbz#1754815
* Tue Aug 06 2019 Abhi Das <adas@redhat.com> - 4.3-19
- rhbz#1602698 - Fix coverity issues
rhbz#1624173 - Fix annocheck failures
rhbz#1716278 - limit max cpus in mksquashfs
Resolves: rhbz#1602698, rhbz#1624173, rhbz#1716278
* Tue Aug 06 2019 Abhi Das <adas@redhat.com> - 4.3-18
- Add manual gating test
Resolves: rhbz#1682413
* Mon Aug 20 2018 Josh Boyer <jwboyer@redhat.com> - 4.3-17
- Fix build against glibc 2.28
Resolves: rhbz#1611746
* Fri Feb 09 2018 Fedora Release Engineering <releng@fedoraproject.org> - 4.3-16
- Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
* Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 4.3-15
- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild
* Thu Jul 27 2017 Fedora Release Engineering <releng@fedoraproject.org> - 4.3-14
- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
* Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 4.3-13
- Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
* Fri Feb 05 2016 Fedora Release Engineering <releng@fedoraproject.org> - 4.3-12
- Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild
* Tue Jun 23 2015 Bruno Wolff III <bruno@wolff.to> - 4.3-10
- Fix for CVE 2015-4645/4646
* Fri Jun 19 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.3-9
- Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
* Sat Sep 13 2014 Bruno Wolff III <bruno@wolff.to> 4.3-8
- Fix for files >= 2gb rhbz #1141206
* Mon Aug 18 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.3-7
- Rebuilt for https://fedoraproject.org/wiki/Fedora_21_22_Mass_Rebuild
* Fri Jun 13 2014 Bruno Wolff III <bruno@wolff.to> 4.3-6
- Apply a couple of upstream patches.
- Fixes issue issue with too much memory use under PAE kernels
* Sun Jun 08 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.3-5
- Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
* Wed May 14 2014 Bruno Wolff III <bruno@wolff.to> 4.3-4
- Even more man page fixes
* Wed May 14 2014 Bruno Wolff III <bruno@wolff.to> 4.3-3
- More mksquashfs man page fixes
* Tue May 13 2014 Bruno Wolff III <bruno@wolff.to> 4.3-2
- Add missed option to the mksquashfs man page
* Tue May 13 2014 Bruno Wolff III <bruno@wolff.to> 4.3-1
- Update to real 4.3 release
- Added support for lz4 since the stable snapshot
- Added support for alternate zlib compression strategies
* Sun Aug 04 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.3-0.19.gitaae0aff4
- Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild
* Sat Jun 22 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.18.gitaae0aff4
- Latest pre 4.3 stable snapshot
- A few minor bug fixes
- Improvements in getting status info while running unsquashfs
* Tue Jun 04 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.17.git5c6f0024
- Latest pre 4.3 snapshot
- Includes fix for mksquashfs hangs
- Switch to get pre-release updates from the stable branch at kernel.org
* Thu May 23 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.16.git84d8ae5c
- Latest pre 4.3 snapshot
- Fix for a rare race condition
* Sun May 19 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.15.git27d7c14b
- Latest pre 4.3 snapshot
- queue fragment and empty file buffers directly to main thread
* Wed May 15 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.14.git8ce5585e
- Latest pre 4.3 snapshot
- Includes upstream bugfix introduced with the sequential queue change
* Sat May 11 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.13.gitc2362556
- Latest pre 4.3 snapshot
- Sequential queue change
* Mon May 06 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.12.git9353c998
- Latest pre 4.3 snapshot
* Sun Mar 31 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.11.git8228a3e8
- Latest pre 4.3 snapshot
- SIGQUIT now displays the file being squashed
* Wed Mar 06 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.10.git6a103792
- Latest pre 4.3 snapshot
- Pick up some more error handling improvements
* Sun Mar 03 2013 Kyle McMartin <kmcmarti@redhat.com>
- Move mksquashfs to /usr/sbin, as per UsrMove.
* Sun Mar 03 2013 Kyle McMartin <kmcmarti@redhat.com>
- Add mksquashfs.1 and unsquashfs.1 manpages from Debian.
* Mon Feb 18 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.9.git3ec9c8f7
- Latest pre 4.3 snapshot
- Better error handling when space runs out
* Wed Feb 13 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.8.gitca6a1c90
- Latest pre 4.3 snapshot
- New option to display compression options used
- Some error message improvements
* Fri Feb 01 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.7.gitb10063a9
- Latest pre 4.3 snapshot
- More checks for bad data
* Sun Jan 13 2013 Bruno Wolff III <bruno@wolff.to> - 4.3-0.6.git6c0f229d
- Latest pre 4.3 snapshot
- Quote and backslash parsing for lexical analyzer
* Mon Dec 31 2012 Bruno Wolff III <bruno@wolff.to> - 4.3-0.5.gitc11af515
- Latest pre 4.3 snapshot
- A few memory leak fixes
- Additional checks for handling bad data
* Sun Dec 23 2012 Bruno Wolff III <bruno@wolff.to> - 4.3-0.4.git99a009c8
- Better checking of data in psuedo files
* Fri Dec 21 2012 Bruno Wolff III <bruno@wolff.to> - 4.3-0.3.git7ec6bd7a
- Better checking of data in sort, extract and exclude files
* Thu Dec 13 2012 Bruno Wolff III <bruno@wolff.to> - 4.3-0.2.git54719971
- Pick up a few more changes to better handle bad data
* Sat Dec 01 2012 Bruno Wolff III <bruno@wolff.to> - 4.3-0.1.git0be606be
- Pre-release of 4.3 to get early testing
- This update includes a bit of internal code infrastructure changes
- There are lots of fixes to better handle bad data
- The final release is expected sometime in December
- Until the release only the README doc file is available
* Sun Nov 25 2012 Bruno Wolff III <bruno@wolff.to> - 4.2-5
- Backported fix for bz 842460 (CVE-2012-4025)
* Thu Nov 22 2012 Bruno Wolff III <bruno@wolff.to> - 4.2-4
- Backported fix for bz 842458 (CVE-2012-4024)
* Sat Jul 21 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.2-3
- Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild
* Sat Jan 14 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.2-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_17_Mass_Rebuild
* Tue Mar 01 2011 Bruno Wolff III <bruno@wolff.to> - 4.2-1
- 4.2 is released.
- Bugfix for bad data causing crash.
- Include doc files added for release.
- Big endian patch is now upstream.
- Buildroot tag isn't needed any more.
- We can now specify CFLAGS on the make call.
- Compressor options are now passed with the make call.
* Wed Feb 09 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.2-0.4.20101231
- Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild
* Tue Jan 11 2011 Dan Horák <dan[at]danny.cz> - 4.2-0.3.20101231
- Add fixes for big-endian machines
* Sat Jan 01 2011 Bruno Wolff III <bruno@wolff.to> - 4.2-0.2.20101231
- Pull latest upstream snapshot
- Includes check for matching compression type when adding to an existing image
- Sample cvs command now includes timezone and specifies when on the date to use for the snapshot
* Fri Dec 24 2010 Bruno Wolff III <bruno@wolff.to> - 4.2-0.1.20101223
- Switch to 4.2 development snapshot to get new XZ support
- LZMA and XZ (LZMA2) support are now different
* Wed Oct 27 2010 Bruno Wolff III <bruno@wolff.to> - 4.1-3
- Rebuild for xz soname bump
* Wed Sep 29 2010 jkeating - 4.1-2
- Rebuilt for gcc bug 634757
* Tue Sep 21 2010 Bruno Wolff III <bruno@wolff.to> - 4.1-1
- Update to 4.1 final.
- Byte swap patch is now upstream.
- LZO compression type is now supported.
* Mon Sep 6 2010 Dan Horák <dan[at]danny.cz> - 4.1-0.5.20100827
- Add fixes for big-endian machines
* Sat Aug 28 2010 Bruno Wolff III <bruno@wolff.to> - 4.1-0.4.20100827
- Rebase to latest upstream.
- The main reason is to pick up a fix for large xattr similar to the large inode fix. This doesn't need to get backported as 4.0 doesn't have xattr support.
- An option was added to build without xattr support.
- Various source cleanups have been done as well.
* Tue Aug 03 2010 Bruno Wolff III <bruno@wolff.to> - 4.1-0.3.20100803
- Rebase to latest upstream
- Prevent warning message for xattr for virtual directory
- Fix issue with large inodes - BZ 619020
* Tue Jul 27 2010 Bruno Wolff III <bruno@wolff.to> - 4.1-0.2.20100727
- Rebase to latest upstream devel state. Mostly xattr fixes and cleanup.
* Tue Jun 08 2010 Bruno Wolff III <bruno@wolff.to> - 4.1-0.1.20100607
- Rebase to 4.1 prerelease with xz wrapper
- Provides lzma compression as an option.
- squashfs-fix-unsquashing-v3.patch is part of the 4.1 prerelease
* Wed May 5 2010 Kyle McMartin <kyle@redhat.com> 4.0-4
- squashfs-fix-unsquashing-v3.patch: pull in fix from cvs. Thanks pkl!
(rhbz#523504)
* Thu Feb 18 2010 Kyle McMartin <kyle@redhat.com> 4.0-3
- Update to release tarball as opposed to cvs snapshot.
- Add dist tag.
* Sun Jul 26 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.0-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_12_Mass_Rebuild
* Sun Apr 05 2009 Kyle McMartin <kyle@redhat.com> - 4.0-1
- Update to release 4.0
* Mon Mar 16 2009 Kyle McMartin <kyle@redhat.com> - 4.0-0.20090316
- update to cvs snap from 2009-03-16.
* Wed Feb 25 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.0-0.20090126
- Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild
* Mon Jan 26 2009 Kyle McMartin <kyle@redhat.com> - 4.0-0.20090125
- update to cvs snap that should unbreak big endian machines creating
little endian fs.
* Mon Jan 12 2009 <katzj@redhat.com> - 4.0-0.20090112
- update to cvs snap that generates v4.0 images
* Tue Sep 30 2008 Jeremy Katz <katzj@redhat.com> - 3.4-1
- update to 3.4
* Tue Feb 19 2008 Fedora Release Engineering <rel-eng@fedoraproject.org> - 3.3-2
- Autorebuild for GCC 4.3
* Fri Dec 14 2007 Jeremy Katz <katzj@redhat.com> - 3.3-1
- Update to 3.3
* Wed Sep 5 2007 Jeremy Katz <katzj@redhat.com> - 3.2-2
- fixes from package review (#226430)
* Tue Mar 20 2007 Jeremy Katz <katzj@redhat.com> - 3.2-1
- update to 3.2r2
* Sun Oct 01 2006 Jesse Keating <jkeating@redhat.com> - 3.0-4
- rebuilt for unwind info generation, broken in gcc-4.1.1-21
* Mon Sep 18 2006 Jeremy Katz <katzj@redhat.com> - 3.0-3
- updated fragment size patch (#204638)
* Wed Aug 16 2006 Jeremy Katz <katzj@redhat.com> - 3.0-2
- add upstream patch for fragment size problem (#202663)
* Wed Jul 12 2006 Jesse Keating <jkeating@redhat.com> - 3.0-1.1
- rebuild
* Fri Jun 23 2006 Jeremy Katz <katzj@redhat.com> - 3.0-1
- update to 3.0
- include unsquashfs
* Tue May 16 2006 Jeremy Katz <katzj@redhat.com>
- add BR on zlib-devel (Andreas Thienemann, #191880)
* Fri Feb 10 2006 Jesse Keating <jkeating@redhat.com> - 2.2r2-2.2.1
- bump again for double-long bug on ppc(64)
* Tue Feb 07 2006 Jesse Keating <jkeating@redhat.com> - 2.2r2-2.2
- rebuilt for new gcc4.1 snapshot and glibc changes
* Fri Dec 09 2005 Jesse Keating <jkeating@redhat.com>
- rebuilt
* Thu Dec 1 2005 Jeremy Katz <katzj@redhat.com> - 2.2r2-1
- Initial build