Phillip Lougher f26044c83e squashfs: avoid bio_alloc() failure with 1Mbyte blocks ... This is a regression introduced by the patch "migrate from ll_rw_block usage to BIO". Bio_alloc() is limited to 256 pages (1 Mbyte). This can cause a failure when reading 1 Mbyte block filesystems. The problem is a datablock can be fully (or almost uncompressed), requiring 256 pages, but, because blocks are not aligned to page boundaries, it may require 257 pages to read. Bio_kmalloc() can handle 1024 pages, and so use this for the edge condition. Fixes: 93e72b3c61 ("squashfs: migrate from ll_rw_block usage to BIO") Reported-by: Nicolas Prochazka <nicolas.prochazka@gmail.com> Reported-by: Tomoatsu Shimada <shimada@walbrix.com> Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Guenter Roeck <groeck@chromium.org> Cc: Philippe Liard <pliard@google.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Adrien Schildknecht <adrien+dev@schischi.me> Cc: Daniel Rosenberg <drosen@google.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20200815035637.15319-1-phillip@squashfs.org.uk Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-08-21 09:52:53 -07:00
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block.c	squashfs: avoid bio_alloc() failure with 1Mbyte blocks	2020-08-21 09:52:53 -07:00
cache.c
decompressor.c
decompressor.h
decompressor_multi.c
decompressor_multi_percpu.c
decompressor_single.c
dir.c
export.c
file.c
file_cache.c
file_direct.c
fragment.c
id.c
inode.c
Kconfig
lz4_wrapper.c
lzo_wrapper.c
Makefile
namei.c
page_actor.c
page_actor.h
squashfs.h
squashfs_fs.h	Squashfs: Replace zero-length array with flexible-array	2020-06-15 23:08:32 -05:00
squashfs_fs_i.h
squashfs_fs_sb.h
super.c
symlink.c
xattr.c
xattr.h
xattr_id.c
xz_wrapper.c
zlib_wrapper.c
zstd_wrapper.c