wireguard-linux/fs/squashfs/squashfs.h, branch jd/unified-crypt-queue

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 35

2019-05-24T15:27:11Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 23 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Kate Stewart Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520170857.458548087@linutronix.de Signed-off-by: Greg Kroah-Hartman

Squashfs: Compute expected length from inode size rather than block length

2018-08-02T16:34:02Z

Previously in squashfs_readpage() when copying data into the page cache, it used the length of the datablock read from the filesystem (after decompression). However, if the filesystem has been corrupted this data block may be short, which will leave pages unfilled. The fix for this is to compute the expected number of bytes to copy from the inode size, and use this to detect if the block is short. Signed-off-by: Phillip Lougher Tested-by: Willy Tarreau Cc: Анатолий Тросиненко Signed-off-by: Linus Torvalds

squashfs metadata 2: electric boogaloo

2018-08-01T17:38:43Z

Anatoly continues to find issues with fuzzed squashfs images. This time, corrupt, missing, or undersized data for the page filling wasn't checked for, because the squashfs_{copy,read}_cache() functions did the squashfs_copy_data() call without checking the resulting data size. Which could result in the page cache pages being incompletely filled in, and no error indication to the user space reading garbage data. So make a helper function for the "fill in pages" case, because the exact same incomplete sequence existed in two places. [ I should have made a squashfs branch for these things, but I didn't intend to start doing them in the first place. My historical connection through cramfs is why I got into looking at these issues at all, and every time I (continue to) think it's a one-off. Because _this_ time is always the last time. Right? - Linus ] Reported-by: Anatoly Trosinenko Tested-by: Willy Tarreau Cc: Al Viro Cc: Phillip Lougher Signed-off-by: Linus Torvalds

fs/squashfs/squashfs.h: replace pr_warning by pr_warn

2014-06-04T23:53:52Z

Update the last pr_warning callsite in fs branch Signed-off-by: Fabian Frederick Cc: Phillip Lougher Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Squashfs: Restructure squashfs_readpage()

2013-11-20T03:59:07Z

Restructure squashfs_readpage() splitting it into separate functions for datablocks, fragments and sparse blocks. Move the memcpying (from squashfs cache entry) implementation of squashfs_readpage_block into file_cache.c This allows different implementations to be supported. Signed-off-by: Phillip Lougher Reviewed-by: Minchan Kim

Squashfs: Generalise paging handling in the decompressors

2013-11-20T03:59:01Z

Further generalise the decompressors by adding a page handler abstraction. This adds helpers to allow the decompressors to access and process the output buffers in an implementation independant manner. This allows different types of output buffer to be passed to the decompressors, with the implementation specific aspects handled at decompression time, but without the knowledge being held in the decompressor wrapper code. This will allow the decompressors to handle Squashfs cache buffers, and page cache pages. This patch adds the abstraction and an implementation for the caches. Signed-off-by: Phillip Lougher Reviewed-by: Minchan Kim

Squashfs: Refactor decompressor interface and code

2013-11-20T03:35:18Z

The decompressor interface and code was written from the point of view of single-threaded operation. In doing so it mixed a lot of single-threaded implementation specific aspects into the decompressor code and elsewhere which makes it difficult to seamlessly support multiple different decompressor implementations. This patch does the following: 1. It removes compressor_options parsing from the decompressor init() function. This allows the decompressor init() function to be dynamically called to instantiate multiple decompressors, without the compressor options needing to be read and parsed each time. 2. It moves threading and all sleeping operations out of the decompressors. In doing so, it makes the decompressors non-blocking wrappers which only deal with interfacing with the decompressor implementation. 3. It splits decompressor.[ch] into decompressor generic functions in decompressor.[ch], and moves the single threaded decompressor implementation into decompressor_single.c. The result of this patch is Squashfs should now be able to support multiple decompressors by adding new decompressor_xxx.c files with specialised implementations of the functions in decompressor_single.c Signed-off-by: Phillip Lougher Reviewed-by: Minchan Kim

Squashfs: Make ZLIB compression support optional

2011-07-22T02:01:28Z

Squashfs now supports XZ and LZO compression in addition to ZLIB. As such it no longer makes sense to always include ZLIB support. In particular embedded systems may only use LZO or XZ compression, and the ability to exclude ZLIB support will reduce kernel size. Signed-off-by: Phillip Lougher

Squashfs: update email address

2011-05-26T09:49:11Z

My existing email address may stop working in a month or two, so update email to one that will continue working. Signed-off-by: Phillip Lougher

Squashfs: add sanity checks to fragment reading at mount time

2011-05-25T17:21:33Z

Fsfuzzer generates corrupted filesystems which throw a warn_on in kmalloc. One of these is due to a corrupted superblock fragments field. Fix this by checking that the number of bytes to be read (and allocated) does not extend into the next filesystem structure. Also add a couple of other sanity checks of the mount-time fragment table structures. Signed-off-by: Phillip Lougher