android_kernel_xiaomi_sm8350/fs/hfsplus
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
bitmap.c
bnode.c
brec.c
btree.c
catalog.c
dir.c
extents.c
hfsplus_fs.h
hfsplus_raw.h
inode.c
ioctl.c
Kconfig
Makefile
options.c New helper - current_umask() 2009-03-31 23:00:26 -04:00
part_tbl.c
super.c fs: Make unload_nls() NULL pointer safe 2009-09-24 07:47:42 -04:00
tables.c
unicode.c
wrapper.c hfsplus: refuse to mount volumes larger than 2TB 2009-10-29 07:39:27 -07:00