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authorAndrew Morton <akpm@osdl.org>2006-01-08 01:03:05 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:13:54 -0800
commit54b21a7992a31d30c9a91f7e0a00ffdb4bd0caee (patch)
tree33eca2bf3c1edfd3d76cc0f7c96a392239c6d2ec /fs/freevxfs
parent676121fcb66c861804e38d94214fd5670a1ef595 (diff)
downloadlinux-linaro-54b21a7992a31d30c9a91f7e0a00ffdb4bd0caee.tar.gz
[PATCH] fix possible PAGE_CACHE_SHIFT overflows
We've had two instances recently of overflows when doing 64_bit_value = (32_bit_value << PAGE_CACHE_SHIFT) I did a tree-wide grep of `<<.*PAGE_CACHE_SHIFT' and this is the result. - afs_rxfs_fetch_descriptor.offset is of type off_t, which seems broken. - jfs and jffs are limited to 4GB anyway. - reiserfs map_block_for_writepage() takes an unsigned long for the block - it should take sector_t. (It'll fail for huge filesystems with blocksize<PAGE_CACHE_SIZE) - cramfs_read() needs to use sector_t (I think cramsfs is busted on large filesystems anyway) - affs is limited in file size anyway. - I generally didn't fix 32-bit overflows in directory operations. - arm's __flush_dcache_page() is peculiar. What if the page lies beyond 4G? - gss_wrap_req_priv() needs checking (snd_buf->page_base) Cc: Oleg Drokin <green@linuxhacker.ru> Cc: David Howells <dhowells@redhat.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: <reiserfs-dev@namesys.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Anton Altaparmakov <aia21@cantab.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: <linux-fsdevel@vger.kernel.org> Cc: Miklos Szeredi <miklos@szeredi.hu> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/freevxfs')
-rw-r--r--fs/freevxfs/vxfs_immed.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/freevxfs/vxfs_immed.c b/fs/freevxfs/vxfs_immed.c
index d0401dc68d4..6f5df1700e9 100644
--- a/fs/freevxfs/vxfs_immed.c
+++ b/fs/freevxfs/vxfs_immed.c
@@ -99,8 +99,8 @@ static int
vxfs_immed_readpage(struct file *fp, struct page *pp)
{
struct vxfs_inode_info *vip = VXFS_INO(pp->mapping->host);
- u_int64_t offset = pp->index << PAGE_CACHE_SHIFT;
- caddr_t kaddr;
+ u_int64_t offset = (u_int64_t)pp->index << PAGE_CACHE_SHIFT;
+ caddr_t kaddr;
kaddr = kmap(pp);
memcpy(kaddr, vip->vii_immed.vi_immed + offset, PAGE_CACHE_SIZE);