From: David Gibson <da...@gibson.dropbear.id.au>
Coverity gets a bit confused by loading fdt_size_dt_strings() and
using it in a memmove(). In fact this is safe because the callers
have verified this information (via FDT_RW_PROBE() in fdt_pack() or
construction in fdt_open_into()).
Passing in strings_size like we already do struct_size seems to get
Coverity to follow what's going on here.
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
---
cpukit/dtc/libfdt/fdt_rw.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/cpukit/dtc/libfdt/fdt_rw.c b/cpukit/dtc/libfdt/fdt_rw.c
index 2fbb545f9c..3621d3651d 100644
--- a/cpukit/dtc/libfdt/fdt_rw.c
+++ b/cpukit/dtc/libfdt/fdt_rw.c
@@ -394,7 +394,9 @@ int fdt_del_node(void *fdt, int nodeoffset)
}
static void fdt_packblocks_(const char *old, char *new,
- int mem_rsv_size, int struct_size)
+ int mem_rsv_size,
+ int struct_size,
+ int strings_size)
{
int mem_rsv_off, struct_off, strings_off;
@@ -409,8 +411,7 @@ static void fdt_packblocks_(const char *old, char *new,
fdt_set_off_dt_struct(new, struct_off);
fdt_set_size_dt_struct(new, struct_size);
- memmove(new + strings_off, old + fdt_off_dt_strings(old),
- fdt_size_dt_strings(old));
+ memmove(new + strings_off, old + fdt_off_dt_strings(old), strings_size);
fdt_set_off_dt_strings(new, strings_off);
fdt_set_size_dt_strings(new, fdt_size_dt_strings(old));
}
@@ -470,7 +471,8 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize)
return -FDT_ERR_NOSPACE;
}
- fdt_packblocks_(fdt, tmp, mem_rsv_size, struct_size);
+ fdt_packblocks_(fdt, tmp, mem_rsv_size, struct_size,
+ fdt_size_dt_strings(fdt));
memmove(buf, tmp, newsize);
fdt_set_magic(buf, FDT_MAGIC);
@@ -490,7 +492,8 @@ int fdt_pack(void *fdt)
mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
* sizeof(struct fdt_reserve_entry);
- fdt_packblocks_(fdt, fdt, mem_rsv_size, fdt_size_dt_struct(fdt));
+ fdt_packblocks_(fdt, fdt, mem_rsv_size, fdt_size_dt_struct(fdt),
+ fdt_size_dt_strings(fdt));
fdt_set_totalsize(fdt, fdt_data_size_(fdt));
return 0;
--
2.31.1
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