4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
commit 7012040576c6ae25a47035659ee48673612c2c27 upstream.
When freeing the fw_priv the item is taken off the list. This causes an
oops in the FW_OPT_NOCACHE case as the list object is not initialized.
Make sure to initialize the list object regardless of this flag.
Fixes: 422b3db2a503 ("firmware: Fix security issue with request_firmware_into_buf()")
Cc: stable@xxxxxxxxxxxxxxx
Cc: Rishabh Bhatnagar <rishabhb@xxxxxxxxxxxxxx>
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/base/firmware_loader/main.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -226,8 +226,11 @@ static int alloc_lookup_fw_priv(const ch
}
tmp = __allocate_fw_priv(fw_name, fwc, dbuf, size);
- if (tmp && !(opt_flags & FW_OPT_NOCACHE))
- list_add(&tmp->list, &fwc->head);
+ if (tmp) {
+ INIT_LIST_HEAD(&tmp->list);
+ if (!(opt_flags & FW_OPT_NOCACHE))
+ list_add(&tmp->list, &fwc->head);
+ }
spin_unlock(&fwc->lock);
*fw_priv = tmp;
