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generic: deny write to uImage.FIT sub-image partitions

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Set policy bit to force read-only mode on uImage.FIT filesystem
sub-images mapped as block partitions by the FIT partition parser.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle
2022-01-11 00:00:36 +00:00
parent 8cdc356f8c
commit f2c3875dfc
2 changed files with 8 additions and 4 deletions
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2
target/linux/generic/files/block/partitions/fit.c
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@@ -230,7 +230,7 @@ int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector,
strlcat(state->pp_buf, tmp, PAGE_SIZE);
state->parts[*slot].has_info = true;
state->parts[*slot].flags |= ADDPART_FLAG_READONLY;
if (config_loadables && !strcmp(image_name, config_loadables)) {
printk(KERN_DEBUG "FIT: selecting configured loadable \"%s\" to be root filesystem\n", image_name);
state->parts[*slot].flags |= ADDPART_FLAG_ROOTDEV;