diff options
| author | Anton Ivanov <[email protected]> | 2026-06-02 19:27:52 +0100 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2026-06-13 10:42:17 -0600 |
| commit | f3d2ff3f5c3f49216b45a30b4b9a315a1b8d2142 (patch) | |
| tree | 8a3452ce0628247f697acfa6f83fff20a0d67c2b /scripts | |
| parent | 69f6272b24a26c17a5b6de3b041218ec57239943 (diff) | |
fdt: Check return value of fdt_get_name() calls
fdt_get_name() can return NULL and set len to a negative error code.
fdt_find_regions() does not check for this, leading to a potential NULL
pointer dereference and a buffer out-of-bounds write during signature
verification of an untrusted FIT. fdt_next_region(), fdt_check_full(),
and display_fdt_by_regions() also lack validation.
Add NULL checks and propagate the error code from fdt_get_name()
to the caller.
Signed-off-by: Anton Ivanov <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/dtc/libfdt/fdt_ro.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/scripts/dtc/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c index 3e7e26b4398..d7b424c658f 100644 --- a/scripts/dtc/libfdt/fdt_ro.c +++ b/scripts/dtc/libfdt/fdt_ro.c @@ -940,6 +940,9 @@ int fdt_check_full(const void *fdt, size_t bufsize) int len; name = fdt_get_name(fdt, offset, &len); + if (!name) + return len; + if (*name || len) return -FDT_ERR_BADLAYOUT; } |