linux_dsm_epyc7002/fs/squashfs
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
..
block.c squashfs: avoid bio_alloc() failure with 1Mbyte blocks 2020-08-21 09:52:53 -07:00
cache.c
decompressor_multi_percpu.c Merge branch 'akpm' (patches from Andrew) 2020-06-02 12:21:36 -07:00
decompressor_multi.c squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00
decompressor_single.c squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00
decompressor.c
decompressor.h squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00
dir.c
export.c
file_cache.c
file_direct.c
file.c
fragment.c
id.c
inode.c
Kconfig
lz4_wrapper.c squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00
lzo_wrapper.c squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00
Makefile
namei.c
page_actor.c
page_actor.h
squashfs_fs_i.h
squashfs_fs_sb.h
squashfs_fs.h Squashfs: Replace zero-length array with flexible-array 2020-06-15 23:08:32 -05:00
squashfs.h squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00
super.c
symlink.c
xattr_id.c
xattr.c
xattr.h
xz_wrapper.c squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00
zlib_wrapper.c squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00
zstd_wrapper.c squashfs: migrate from ll_rw_block usage to BIO 2020-06-02 10:59:05 -07:00