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Diffstat (limited to 'fs/xfs/xfs_vnodeops.c')
-rw-r--r--fs/xfs/xfs_vnodeops.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 4ecf2a549060..ce9268a2f56b 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -112,7 +112,7 @@ xfs_readlink(
112 char *link) 112 char *link)
113{ 113{
114 xfs_mount_t *mp = ip->i_mount; 114 xfs_mount_t *mp = ip->i_mount;
115 int pathlen; 115 xfs_fsize_t pathlen;
116 int error = 0; 116 int error = 0;
117 117
118 trace_xfs_readlink(ip); 118 trace_xfs_readlink(ip);
@@ -122,13 +122,19 @@ xfs_readlink(
122 122
123 xfs_ilock(ip, XFS_ILOCK_SHARED); 123 xfs_ilock(ip, XFS_ILOCK_SHARED);
124 124
125 ASSERT(S_ISLNK(ip->i_d.di_mode));
126 ASSERT(ip->i_d.di_size <= MAXPATHLEN);
127
128 pathlen = ip->i_d.di_size; 125 pathlen = ip->i_d.di_size;
129 if (!pathlen) 126 if (!pathlen)
130 goto out; 127 goto out;
131 128
129 if (pathlen < 0 || pathlen > MAXPATHLEN) {
130 xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)",
131 __func__, (unsigned long long) ip->i_ino,
132 (long long) pathlen);
133 ASSERT(0);
134 return XFS_ERROR(EFSCORRUPTED);
135 }
136
137
132 if (ip->i_df.if_flags & XFS_IFINLINE) { 138 if (ip->i_df.if_flags & XFS_IFINLINE) {
133 memcpy(link, ip->i_df.if_u1.if_data, pathlen); 139 memcpy(link, ip->i_df.if_u1.if_data, pathlen);
134 link[pathlen] = '\0'; 140 link[pathlen] = '\0';