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Ben Hutchings 5c36fe3d87 hfsplus: refuse to mount volumes larger than 2TB

As found in <http://bugs.debian.org/550010>, hfsplus is using type u32
rather than sector_t for some sector number calculations.

In particular, hfsplus_get_block() does:

        u32 ablock, dblock, mask;
...
        map_bh(bh_result, sb, (dblock << HFSPLUS_SB(sb).fs_shift) + HFSPLUS_SB(sb).blockoffset + (iblock & mask));

I am not confident that I can find and fix all cases where a sector number
may be truncated.  For now, avoid data loss by refusing to mount HFS+
volumes with more than 2^32 sectors (2TB).

[akpm@linux-foundation.org: fix 32 and 64-bit issues]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Eric Sesterhenn <snakebyte@gmx.de>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-10-29 07:39:27 -07:00

bfind.c

[PATCH] hfs: cleanup HFS+ prints

2006-01-18 19:20:22 -08:00

bitmap.c

hfsplus: check read_mapping_page() return value

2008-10-16 11:21:46 -07:00

bnode.c

[PATCH] fs: Conversions from kmalloc+memset to k(z|c)alloc

2006-09-27 08:26:10 -07:00

brec.c

[PATCH] hfs: cleanup HFS+ prints