4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jan Kara <jack@xxxxxxx>
commit 19fd80de0a8b5170ef34704c8984cca920dffa59 upstream.
When adding extent to a file fails, so far we've silently squelshed the
error. Make sure to propagate it up properly.
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/udf/inode.c | 41 +++++++++++++++++++++++++++--------------
1 file changed, 27 insertions(+), 14 deletions(-)
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -50,15 +50,15 @@ static int udf_update_inode(struct inode
static int udf_sync_inode(struct inode *inode);
static int udf_alloc_i_data(struct inode *inode, size_t size);
static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
-static int8_t udf_insert_aext(struct inode *, struct extent_position,
- struct kernel_lb_addr, uint32_t);
+static int udf_insert_aext(struct inode *, struct extent_position,
+ struct kernel_lb_addr, uint32_t);
static void udf_split_extents(struct inode *, int *, int, udf_pblk_t,
struct kernel_long_ad *, int *);
static void udf_prealloc_extents(struct inode *, int, int,
struct kernel_long_ad *, int *);
static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *);
-static void udf_update_extents(struct inode *, struct kernel_long_ad *, int,
- int, struct extent_position *);
+static int udf_update_extents(struct inode *, struct kernel_long_ad *, int,
+ int, struct extent_position *);
static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
static void __udf_clear_extent_cache(struct inode *inode)
@@ -881,7 +881,9 @@ static sector_t inode_getblk(struct inod
/* write back the new extents, inserting new extents if the new number
* of extents is greater than the old number, and deleting extents if
* the new number of extents is less than the old number */
- udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
+ *err = udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
+ if (*err < 0)
+ goto out_free;
newblock = udf_get_pblock(inode->i_sb, newblocknum,
iinfo->i_location.partitionReferenceNum, 0);
@@ -1149,21 +1151,30 @@ static void udf_merge_extents(struct ino
}
}
-static void udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr,
- int startnum, int endnum,
- struct extent_position *epos)
+static int udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr,
+ int startnum, int endnum,
+ struct extent_position *epos)
{
int start = 0, i;
struct kernel_lb_addr tmploc;
uint32_t tmplen;
+ int err;
if (startnum > endnum) {
for (i = 0; i < (startnum - endnum); i++)
udf_delete_aext(inode, *epos);
} else if (startnum < endnum) {
for (i = 0; i < (endnum - startnum); i++) {
- udf_insert_aext(inode, *epos, laarr[i].extLocation,
- laarr[i].extLength);
+ err = udf_insert_aext(inode, *epos,
+ laarr[i].extLocation,
+ laarr[i].extLength);
+ /*
+ * If we fail here, we are likely corrupting the extent
+ * list and leaking blocks. At least stop early to
+ * limit the damage.
+ */
+ if (err < 0)
+ return err;
udf_next_aext(inode, epos, &laarr[i].extLocation,
&laarr[i].extLength, 1);
start++;
@@ -1175,6 +1186,7 @@ static void udf_update_extents(struct in
udf_write_aext(inode, epos, &laarr[i].extLocation,
laarr[i].extLength, 1);
}
+ return 0;
}
struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
@@ -2191,12 +2203,13 @@ int8_t udf_current_aext(struct inode *in
return etype;
}
-static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
- struct kernel_lb_addr neloc, uint32_t nelen)
+static int udf_insert_aext(struct inode *inode, struct extent_position epos,
+ struct kernel_lb_addr neloc, uint32_t nelen)
{
struct kernel_lb_addr oeloc;
uint32_t oelen;
int8_t etype;
+ int err;
if (epos.bh)
get_bh(epos.bh);
@@ -2206,10 +2219,10 @@ static int8_t udf_insert_aext(struct ino
neloc = oeloc;
nelen = (etype << 30) | oelen;
}
- udf_add_aext(inode, &epos, &neloc, nelen, 1);
+ err = udf_add_aext(inode, &epos, &neloc, nelen, 1);
brelse(epos.bh);
- return (nelen >> 30);
+ return err;
}
int8_t udf_delete_aext(struct inode *inode, struct extent_position epos)
