freedreno/decode: fix possible overflow

```
../src/freedreno/decode/rddecompiler.c:242:65: error: 'sscanf' may overflow; destination buffer in argument 3 has size 32, but the corresponding specifier may require size 33 [-Werror,-Wfortify-source]
         if (sscanf(info->name, "%32[A-Z0-6_][%32[x0-9]].%32s", reg_name,
                                                                ^
../src/freedreno/decode/rddecompiler.c:243:21: error: 'sscanf' may overflow; destination buffer in argument 4 has size 32, but the corresponding specifier may require size 33 [-Werror,-Wfortify-source]
                    reg_idx, field_name) != 3) {
                    ^
../src/freedreno/decode/rddecompiler.c:243:30: error: 'sscanf' may overflow; destination buffer in argument 5 has size 32, but the corresponding specifier may require size 33 [-Werror,-Wfortify-source]
                    reg_idx, field_name) != 3) {
                             ^
```

Reviewed-by: Rob Clark <robclark@freedesktop.org>
Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22015>

diff --git a/src/freedreno/decode/rddecompiler.c b/src/freedreno/decode/rddecompiler.c
index 5597450..16d623c 100644 (file)
--- a/src/freedreno/decode/rddecompiler.c
+++ b/src/freedreno/decode/rddecompiler.c
@@ -231,9 +231,9 @@ decompile_register(uint32_t regbase, uint32_t *dwords, uint16_t cnt, int level)
       if (cnt == 0) {
          printlvl(level, "pkt(cs, %u);\n", dword);
       } else {
-         char reg_name[32];
-         char field_name[32];
-         char reg_idx[32];
+         char reg_name[33];
+         char field_name[33];
+         char reg_idx[33];
 
          /* reginfo doesn't return reg name in a compilable format, for now just
           * parse it into a compilable reg name.