| Message ID | 20140213225430.GC11924@wallace |
|---|---|
| State | Accepted, archived |
| Headers | show |
On Thu, Feb 13, 2014 at 05:54:30PM -0500, Eric Whitney wrote: > Commit 3779473246 breaks the return of error codes from > ext4_ext_handle_uninitialized_extents() in ext4_ext_map_blocks(). A > portion of the patch assigns that function's signed integer return > value to an unsigned int. Consequently, negatively valued error codes > are lost and can be treated as a bogus allocated block count. > > Signed-off-by: Eric Whitney <enwlinux@gmail.com> Thanks, applied. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 74bc2d5..9875fd0 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -4128,7 +4128,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, struct ext4_extent newex, *ex, *ex2; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); ext4_fsblk_t newblock = 0; - int free_on_err = 0, err = 0, depth; + int free_on_err = 0, err = 0, depth, ret; unsigned int allocated = 0, offset = 0; unsigned int allocated_clusters = 0; struct ext4_allocation_request ar; @@ -4189,9 +4189,13 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, if (!ext4_ext_is_uninitialized(ex)) goto out; - allocated = ext4_ext_handle_uninitialized_extents( + ret = ext4_ext_handle_uninitialized_extents( handle, inode, map, path, flags, allocated, newblock); + if (ret < 0) + err = ret; + else + allocated = ret; goto out3; } }
Commit 3779473246 breaks the return of error codes from ext4_ext_handle_uninitialized_extents() in ext4_ext_map_blocks(). A portion of the patch assigns that function's signed integer return value to an unsigned int. Consequently, negatively valued error codes are lost and can be treated as a bogus allocated block count. Signed-off-by: Eric Whitney <enwlinux@gmail.com> --- fs/ext4/extents.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)