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Bug fix: SIGSEGV with LG GH22LS30 when inquiring media product id

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This commit is contained in:
Thomas Schmitt 2009-12-05 11:17:13 +00:00
parent 2ca3d2d5c3
commit 203976a6db
2 changed files with 38 additions and 2 deletions
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2
libburn/trunk/cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2009.12.02.103036"
#define Cdrskin_timestamP "2009.12.05.111822"

38
libburn/trunk/libburn/mmc.c
View File

@ -4061,6 +4061,7 @@ int mmc_read_disc_structure(struct burn_drive *d,
char **reply, int *reply_len, int flag)
{
int alloc_len = 4, ret;
char msg[80];
mmc_start_if_needed(d, 1);
if (mmc_function_spy(d, "mmc_read_disc_structure") <= 0)
@ -4073,7 +4074,42 @@ int mmc_read_disc_structure(struct burn_drive *d,
fprintf(stderr,"LIBBURN_DEBUG: ADh alloc_len = %d , ret = %d\n",
alloc_len, ret);
*/
if (alloc_len >= 12 && ret > 0)
if (ret <= 0)
return ret;
if (alloc_len < 12) {
sprintf(msg,
"READ DISC STRUCTURE announces only %d bytes of reply\n",
alloc_len);
libdax_msgs_submit(libdax_messenger, -1, 0x00000002,
LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_ZERO,
msg, 0, 0);
ret = 0;
/* LG GH22LS30 revision 1.00 returns for DVD-R an allocation
length of 4 (= 0 payload). A MS-Windows tool can inquire
media code "RITEKF1", though.
This macro causes a try to unconditionally read the desired
payload bytes.
#define Libburn_enforce_structure_code_0x0E 1
*/
#ifdef Libburn_enforce_structure_code_0x0E
if (format == 0x0E) {
alloc_len = min_len + 4;
ret = mmc_read_disc_structure_al(d, &alloc_len,
media_type, layer_number, format, min_len,
reply, reply_len, 0);
if (*reply_len < min_len || *reply == NULL)
ret = 0;
sprintf(msg, "READ DISC STRUCTURE returns %d bytes of required %d\n",
*reply_len + 4, min_len + 4);
libdax_msgs_submit(libdax_messenger, -1, 0x00000002,
LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_ZERO,
msg, 0, 0);
}
#endif
} else
ret = mmc_read_disc_structure_al(d, &alloc_len,
media_type, layer_number, format, min_len,
reply, reply_len, 0);