On 08/29/2017 02:45 PM, Kevin O'Connor wrote:
On Thu, Aug 10, 2017 at 08:52:06PM +0200, Paul Menzel wrote:
Dear SeaBIOS folks,
GCC 7.1 warns about a maybe uninitialized struct member.
```
src/tcgbios.c: In function 'tpm_interrupt_handler32':
src/tcgbios.c:1232:30: warning: 'hleo.eventnumber' may be used uninitialized
in this function [-Wmaybe-uninitialized]
hleeo->eventnumber = hleo.eventnumber;
~~~~^~~~~~~~~~~~
Compiling whole program out/ccode32flat.o
In file included from out/ccode32flat.o.tmp.c:52:0:
./src/tcgbios.c: In function 'tpm_interrupt_handler32':
./src/tcgbios.c:1232:30: warning: 'hleo.eventnumber' may be used
uninitialized in this function [-Wmaybe-uninitialized]
hleeo->eventnumber = hleo.eventnumber;
~~~~^~~~~~~~~~~~
```
It looks valid, as in the beginning the struct hleo is only declared.
```
1189 struct hleo hleo;
```
Agreed - the warning does look valid. I think the patch below should
fix it.
-Kevin
--- a/src/tcgbios.c
+++ b/src/tcgbios.c
@@ -1186,7 +1186,6 @@ hash_log_extend_event_int(const struct hleei_short
*hleei_s,
struct hleeo *hleeo)
{
u32 rc = 0;
- struct hleo hleo;
struct hleei_long *hleei_l = (struct hleei_long *)hleei_s;
const void *logdataptr;
u32 logdatalen;
@@ -1229,7 +1228,7 @@ hash_log_extend_event_int(const struct hleei_short
*hleei_s,
hleeo->opblength = sizeof(struct hleeo);
hleeo->reserved = 0;
- hleeo->eventnumber = hleo.eventnumber;
+ hleeo->eventnumber = tpm_state.entry_count;
memcpy(hleeo->digest, pcpes->digest, sizeof(hleeo->digest));
err_exit:
Review-by: Stefan Berger <stef...@linux.vnet.ibm.com>
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