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Diffstat (limited to 'fs/ubifs/tnc.c')
-rw-r--r--fs/ubifs/tnc.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index ad9cf013362..de485979ca3 100644
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -447,8 +447,11 @@ static int tnc_read_node_nm(struct ubifs_info *c, struct ubifs_zbranch *zbr,
*
* Note, this function does not check CRC of data nodes if @c->no_chk_data_crc
* is true (it is controlled by corresponding mount option). However, if
- * @c->always_chk_crc is true, @c->no_chk_data_crc is ignored and CRC is always
- * checked.
+ * @c->mounting or @c->remounting_rw is true (we are mounting or re-mounting to
+ * R/W mode), @c->no_chk_data_crc is ignored and CRC is checked. This is
+ * because during mounting or re-mounting from R/O mode to R/W mode we may read
+ * journal nodes (when replying the journal or doing the recovery) and the
+ * journal nodes may potentially be corrupted, so checking is required.
*/
static int try_read_node(const struct ubifs_info *c, void *buf, int type,
int len, int lnum, int offs)
@@ -476,7 +479,8 @@ static int try_read_node(const struct ubifs_info *c, void *buf, int type,
if (node_len != len)
return 0;
- if (type == UBIFS_DATA_NODE && !c->always_chk_crc && c->no_chk_data_crc)
+ if (type == UBIFS_DATA_NODE && c->no_chk_data_crc && !c->mounting &&
+ !c->remounting_rw)
return 1;
crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);