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Commit fffb47b8 authored by Phillip Lougher's avatar Phillip Lougher
Browse files

Squashfs: check page size is not larger than the filesystem block size 



Normally the block size (by default 128K) will be larger than the
page size, unless a non-standard block size has been specified in
Mksquashfs, and the page size is larger than 4K.

Signed-off-by: default avatarPhillip Lougher <phillip@lougher.demon.co.uk>
parent a37b06d5

fs/squashfs/super.c

+10 −0
Original line number Diff line number Diff line
@@ -157,6 +157,16 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent) 
	if (msblk->block_size > SQUASHFS_FILE_MAX_SIZE)

		goto failed_mount;



	/*

	 * Check the system page size is not larger than the filesystem

	 * block size (by default 128K).  This is currently not supported.

	 */

	if (PAGE_CACHE_SIZE > msblk->block_size) {

		ERROR("Page size > filesystem block size (%d).  This is "

			"currently not supported!\n", msblk->block_size);

		goto failed_mount;

	}



	msblk->block_log = le16_to_cpu(sblk->block_log);

	if (msblk->block_log > SQUASHFS_FILE_MAX_LOG)

		goto failed_mount;