From 4ba2d5fdcfd19de0dedf394ddc48db2f219fa89a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 16 Feb 2011 09:34:22 +0100 Subject: hfsplus: fix overflow in hfsplus_read_wrapper For partitions larger than 2TB or at such an offset the hfs wrapper code in hfsplus might overflow the range representable in a 32-bit data type. Make sure we use a sector_t for the arithmetics leading to it. I'm not sure this code can be readed at all as hfs itself never supported such large volumes. Signed-off-by: Christoph Hellwig --- fs/hfsplus/wrapper.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/hfsplus/wrapper.c') diff --git a/fs/hfsplus/wrapper.c b/fs/hfsplus/wrapper.c index 4ac88ff79aa6..4b86468125c1 100644 --- a/fs/hfsplus/wrapper.c +++ b/fs/hfsplus/wrapper.c @@ -172,8 +172,9 @@ reread: if (!hfsplus_read_mdb(sbi->s_vhdr, &wd)) goto out_free_backup_vhdr; wd.ablk_size >>= HFSPLUS_SECTOR_SHIFT; - part_start += wd.ablk_start + wd.embed_start * wd.ablk_size; - part_size = wd.embed_count * wd.ablk_size; + part_start += (sector_t)wd.ablk_start + + (sector_t)wd.embed_start * wd.ablk_size; + part_size = (sector_t)wd.embed_count * wd.ablk_size; goto reread; default: /* -- cgit v1.2.3