diff options
author | Andrew Morton <akpm@osdl.org> | 2006-01-08 04:03:05 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 23:13:54 -0500 |
commit | 54b21a7992a31d30c9a91f7e0a00ffdb4bd0caee (patch) | |
tree | 33eca2bf3c1edfd3d76cc0f7c96a392239c6d2ec /fs/freevxfs/vxfs_immed.c | |
parent | 676121fcb66c861804e38d94214fd5670a1ef595 (diff) |
[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/vxfs_immed.c')
-rw-r--r-- | fs/freevxfs/vxfs_immed.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/freevxfs/vxfs_immed.c b/fs/freevxfs/vxfs_immed.c index d0401dc68d41..6f5df1700e95 100644 --- a/fs/freevxfs/vxfs_immed.c +++ b/fs/freevxfs/vxfs_immed.c | |||
@@ -99,8 +99,8 @@ static int | |||
99 | vxfs_immed_readpage(struct file *fp, struct page *pp) | 99 | vxfs_immed_readpage(struct file *fp, struct page *pp) |
100 | { | 100 | { |
101 | struct vxfs_inode_info *vip = VXFS_INO(pp->mapping->host); | 101 | struct vxfs_inode_info *vip = VXFS_INO(pp->mapping->host); |
102 | u_int64_t offset = pp->index << PAGE_CACHE_SHIFT; | 102 | u_int64_t offset = (u_int64_t)pp->index << PAGE_CACHE_SHIFT; |
103 | caddr_t kaddr; | 103 | caddr_t kaddr; |
104 | 104 | ||
105 | kaddr = kmap(pp); | 105 | kaddr = kmap(pp); |
106 | memcpy(kaddr, vip->vii_immed.vi_immed + offset, PAGE_CACHE_SIZE); | 106 | memcpy(kaddr, vip->vii_immed.vi_immed + offset, PAGE_CACHE_SIZE); |