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boot: bootflow_menu: fix crash for EFI BOOTMGR global bootmeth

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The global bootmeths don't set the dev in bootflow struct which means
the dev_get_parent(bflow->dev) triggers a NULL-pointer dereference and
crash U-Boot.

So before trying to handle a bootflow, check that the associated
bootmeth isn't global, otherwise skip it.

Suggested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Quentin Schulz 2024-06-12 16:58:49 +02:00 • committed by Tom Rini
parent 8173166636
commit 05b9665f09
2 changed files with 9 additions and 1 deletions
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7
boot/bootflow_menu.c
View file

@ -9,6 +9,7 @@
#define LOG_CATEGORY UCLASS_BOOTSTD
#include <bootflow.h>
#include <bootmeth.h>
#include <bootstd.h>
#include <cli.h>
#include <dm.h>
@ -76,6 +77,7 @@ int bootflow_menu_new(struct expo **expp)
last_bootdev = NULL;
for (ret = bootflow_first_glob(&bflow), i = 0; !ret && i < 36;
ret = bootflow_next_glob(&bflow), i++) {
struct bootmeth_uc_plat *ucp;
char str[2], *label, *key;
uint preview_id;
bool add_gap;
@ -83,6 +85,11 @@ int bootflow_menu_new(struct expo **expp)
if (bflow->state != BOOTFLOWST_READY)
continue;
/* No media to show for BOOTMETHF_GLOBAL bootmeths */
ucp = dev_get_uclass_plat(bflow->method);
if (ucp->flags & BOOTMETHF_GLOBAL)
continue;
*str = i < 10 ? '0' + i : 'A' + i - 10;
str[1] = '\0';
key = strdup(str);

3
include/bootflow.h
View file

@ -63,7 +63,8 @@ enum bootflow_flags_t {
*
* @bm_node: Points to siblings in the same bootdev
* @glob_node: Points to siblings in the global list (all bootdev)
* @dev: Bootdev device which produced this bootflow
* @dev: Bootdev device which produced this bootflow, NULL for flows created by
* BOOTMETHF_GLOBAL bootmeths
* @blk: Block device which contains this bootflow, NULL if this is a network
* device or sandbox 'host' device
* @part: Partition number (0 for whole device)