Figured it out: it was broken by b946845a9dc523c759cae2b6a0f6827486c3221a commit - "cifs: cifs_parse_mount_options: do not tokenize mount options in-place". So, as a quick fix I suggest to apply this patch.
[PATCH] CIFS: Fix kfree() with constant string in a null user case
Signed-off-by: Pavel Shilovsky <piastryyy@xxxxxxxxx>
---
fs/cifs/connect.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 20c60dd..ad3de1c 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2887,7 +2887,11 @@ try_mount_again:
if (volume_info->nullauth) {
cFYI(1, "null user");
- volume_info->username = "";
+ volume_info->username = kzalloc(1, GFP_KERNEL);
+ if (volume_info->username == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
} else if (volume_info->username) {
/* BB fixme parse for domain name here */
cFYI(1, "Username: %s", volume_info->username);
--
1.7.1
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