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authorJon Tollefson <kniht@linux.vnet.ibm.com>2008-07-23 21:27:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:19 -0700
commitf4a67cceee4a6f5ed38011a698c9e34747270ae5 (patch)
tree6da3eed51a938e1680a6212c56f9383bcf5670e0 /fs/compat.c
parent91224346aa8c1cdaa660300a98e0b074a3a95030 (diff)
downloadlinux-f4a67cceee4a6f5ed38011a698c9e34747270ae5.tar.bz2
fs: check for statfs overflow
Adds a check for an overflow in the filesystem size so if someone is checking with statfs() on a 16G blocksize hugetlbfs in a 32bit binary that it will report back EOVERFLOW instead of a size of 0. Acked-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Jon Tollefson <kniht@linux.vnet.ibm.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/compat.c')
-rw-r--r--fs/compat.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/compat.c b/fs/compat.c
index ed43e17a5dc6..b46604281766 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -197,8 +197,8 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
{
if (sizeof ubuf->f_blocks == 4) {
- if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
- 0xffffffff00000000ULL)
+ if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+ kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
return -EOVERFLOW;
/* f_files and f_ffree may be -1; it's okay
* to stuff that into 32 bits */
@@ -271,8 +271,8 @@ out:
static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
{
if (sizeof ubuf->f_blocks == 4) {
- if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
- 0xffffffff00000000ULL)
+ if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+ kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
return -EOVERFLOW;
/* f_files and f_ffree may be -1; it's okay
* to stuff that into 32 bits */