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authorAl Viro <viro@zeniv.linux.org.uk>2012-11-16 22:27:58 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-11-16 22:27:58 -0500
commitd05f06e60df4f56a70fb8a3e46335b40687169e9 (patch)
treec1eec6749fed86a21b08606e1e4acefe4b033253 /fs/jfs
parent0af1c5300db31f25a412e6e83d42b1747d56c9de (diff)
parent1d72d9f83df057e71c7951def41138a0230bf737 (diff)
downloadlinux-d05f06e60df4f56a70fb8a3e46335b40687169e9.tar.bz2
Merge branch 'arch-frv' into no-rebases
Diffstat (limited to 'fs/jfs')
-rw-r--r--fs/jfs/jfs_discard.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/fs/jfs/jfs_discard.c b/fs/jfs/jfs_discard.c
index 9947563e4175..dfcd50304559 100644
--- a/fs/jfs/jfs_discard.c
+++ b/fs/jfs/jfs_discard.c
@@ -83,7 +83,7 @@ int jfs_ioc_trim(struct inode *ip, struct fstrim_range *range)
struct bmap *bmp = JFS_SBI(ip->i_sb)->bmap;
struct super_block *sb = ipbmap->i_sb;
int agno, agno_end;
- s64 start, end, minlen;
+ u64 start, end, minlen;
u64 trimmed = 0;
/**
@@ -93,15 +93,19 @@ int jfs_ioc_trim(struct inode *ip, struct fstrim_range *range)
* minlen: minimum extent length in Bytes
*/
start = range->start >> sb->s_blocksize_bits;
- if (start < 0)
- start = 0;
end = start + (range->len >> sb->s_blocksize_bits) - 1;
- if (end >= bmp->db_mapsize)
- end = bmp->db_mapsize - 1;
minlen = range->minlen >> sb->s_blocksize_bits;
- if (minlen <= 0)
+ if (minlen == 0)
minlen = 1;
+ if (minlen > bmp->db_agsize ||
+ start >= bmp->db_mapsize ||
+ range->len < sb->s_blocksize)
+ return -EINVAL;
+
+ if (end >= bmp->db_mapsize)
+ end = bmp->db_mapsize - 1;
+
/**
* we trim all ag's within the range
*/