diff options
Diffstat (limited to 'libfdt/fdt_check.c')
| -rw-r--r-- | libfdt/fdt_check.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libfdt/fdt_check.c b/libfdt/fdt_check.c index 9ddfdbf..13595a2 100644 --- a/libfdt/fdt_check.c +++ b/libfdt/fdt_check.c @@ -19,6 +19,7 @@ int fdt_check_full(const void *fdt, size_t bufsize) unsigned int depth = 0; const void *prop; const char *propname; + bool expect_end = false; if (bufsize < FDT_V1_SIZE) return -FDT_ERR_TRUNCATED; @@ -41,6 +42,10 @@ int fdt_check_full(const void *fdt, size_t bufsize) if (nextoffset < 0) return nextoffset; + /* If we see two root nodes, something is wrong */ + if (expect_end && tag != FDT_END) + return -FDT_ERR_BADSTRUCTURE; + switch (tag) { case FDT_NOP: break; @@ -60,6 +65,8 @@ int fdt_check_full(const void *fdt, size_t bufsize) if (depth == 0) return -FDT_ERR_BADSTRUCTURE; depth--; + if (depth == 0) + expect_end = true; break; case FDT_PROP: |