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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/open.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/open.c')
-rw-r--r--fs/open.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/open.c b/fs/open.c
index a99ad09c3197..bb98d2fe809f 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -64,7 +64,8 @@ static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
memcpy(buf, &st, sizeof(st));
else {
if (sizeof buf->f_blocks == 4) {
- if ((st.f_blocks | st.f_bfree | st.f_bavail) &
+ if ((st.f_blocks | st.f_bfree | st.f_bavail |
+ st.f_bsize | st.f_frsize) &
0xffffffff00000000ULL)
return -EOVERFLOW;
/*