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| author | Daniel Golle <daniel@makrotopia.org> | 2022-01-11 00:00:36 +0000 |
|---|---|---|
| committer | Daniel Golle <daniel@makrotopia.org> | 2022-01-11 00:06:16 +0000 |
| commit | f2c3875dfcbf82d993ebe20f9563125c5fde2c60 (patch) | |
| tree | a5e0bef99224f2bd994de33376e206d48b97d9ea /target | |
| parent | 8cdc356f8c30b55698d5f57abbd1f3e16d8c653e (diff) | |
| download | upstream-f2c3875dfcbf82d993ebe20f9563125c5fde2c60.tar.gz upstream-f2c3875dfcbf82d993ebe20f9563125c5fde2c60.tar.bz2 upstream-f2c3875dfcbf82d993ebe20f9563125c5fde2c60.zip | |
generic: deny write to uImage.FIT sub-image partitions
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>
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/generic/files/block/partitions/fit.c | 2 | ||||
| -rw-r--r-- | target/linux/generic/hack-5.10/410-block-fit-partition-parser.patch | 10 |
2 files changed, 8 insertions, 4 deletions
diff --git a/target/linux/generic/files/block/partitions/fit.c b/target/linux/generic/files/block/partitions/fit.c index a0aa0eadf5..fa73e64af8 100644 --- a/target/linux/generic/files/block/partitions/fit.c +++ b/target/linux/generic/files/block/partitions/fit.c @@ -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; diff --git a/target/linux/generic/hack-5.10/410-block-fit-partition-parser.patch b/target/linux/generic/hack-5.10/410-block-fit-partition-parser.patch index c0b3c25339..bc48296d9c 100644 --- a/target/linux/generic/hack-5.10/410-block-fit-partition-parser.patch +++ b/target/linux/generic/hack-5.10/410-block-fit-partition-parser.patch @@ -1,10 +1,11 @@ --- a/block/blk.h +++ b/block/blk.h -@@ -361,6 +361,7 @@ char *disk_name(struct gendisk *hd, int +@@ -361,6 +361,8 @@ char *disk_name(struct gendisk *hd, int #define ADDPART_FLAG_NONE 0 #define ADDPART_FLAG_RAID 1 #define ADDPART_FLAG_WHOLEDISK 2 -+#define ADDPART_FLAG_ROOTDEV 4 ++#define ADDPART_FLAG_READONLY 4 ++#define ADDPART_FLAG_ROOTDEV 8 void delete_partition(struct hd_struct *part); int bdev_add_partition(struct block_device *bdev, int partno, sector_t start, sector_t length); @@ -73,13 +74,16 @@ #ifdef CONFIG_SGI_PARTITION sgi_partition, #endif -@@ -694,6 +701,11 @@ static bool blk_add_partition(struct gen +@@ -694,6 +701,14 @@ static bool blk_add_partition(struct gen (state->parts[p].flags & ADDPART_FLAG_RAID)) md_autodetect_dev(part_to_dev(part)->devt); +#ifdef CONFIG_FIT_PARTITION + if ((state->parts[p].flags & ADDPART_FLAG_ROOTDEV) && ROOT_DEV == 0) + ROOT_DEV = part_to_dev(part)->devt; ++ ++ if (state->parts[p].flags & ADDPART_FLAG_READONLY) ++ part->policy = true; +#endif + return true; |