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authorMike Hommey <mh@glandium.org>2009-11-11 14:26:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-11-12 07:26:01 -0800
commite04b5ef8b49db87d01a9b3a47fe41a918a0c0ff5 (patch)
treef643a43591e5d4593e79bafb47b8d3db70346af2 /fs/ioctl.c
parent276b282e904f690dc930f9bc946110651f297669 (diff)
__generic_block_fiemap(): fix for files bigger than 4GB
Because of an integer overflow on start_blk, various kind of wrong results would be returned by the generic_block_fiemap() handler, such as no extents when there is a 4GB+ hole at the beginning of the file, or wrong fe_logical when an extent starts after the first 4GB. Signed-off-by: Mike Hommey <mh@glandium.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Eric Sandeen <sandeen@sgi.com> Cc: Josef Bacik <jbacik@redhat.com> Cc: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ioctl.c')
-rw-r--r--fs/ioctl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 7b17a14396f..6c751106c2e 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -254,7 +254,7 @@ int __generic_block_fiemap(struct inode *inode,
u64 len, get_block_t *get_block)
{
struct buffer_head tmp;
- unsigned int start_blk;
+ unsigned long long start_blk;
long long length = 0, map_len = 0;
u64 logical = 0, phys = 0, size = 0;
u32 flags = FIEMAP_EXTENT_MERGED;