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Keeping GET CONFIGURATION from requesting more than 4 KB of data

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This commit is contained in:
Thomas Schmitt 2014-07-31 12:32:06 +00:00
parent 3c4dccc966
commit 0c9293f9c6
3 changed files with 19 additions and 3 deletions
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2
cdrskin/cdrskin_timestamp.h
View File

@ -1 +1 @@
#define Cdrskin_timestamP "2014.07.31.122752"
#define Cdrskin_timestamP "2014.07.31.123105"

1
libburn/libdax_msgs.h
View File

@ -610,6 +610,7 @@ Range "scdbackup" : 0x00020000 to 0x0002ffff
0x000201a6 (FATAL,HIGH) = Lost connection to drive
0x000201a7 (FAILURE,HIGH) = SCSI command yielded host problem
0x000201a8 (FAILURE,HIGH) = SCSI command yielded driver problem
0x000201a9 (FAILURE,HIGH) = Implausible lenght from GET CONFIGURATION
libdax_audioxtr:

19
libburn/mmc.c
View File

@ -3238,10 +3238,11 @@ ex:
void mmc_get_configuration(struct burn_drive *d)
{
int alloc_len = 8, ret;
char *msg = NULL;
mmc_start_if_needed(d, 1);
if (mmc_function_spy(d, "mmc_get_configuration") <= 0)
return;
goto ex;
/* first command execution to learn Allocation Length */
ret = mmc_get_configuration_al(d, &alloc_len);
@ -3249,10 +3250,24 @@ void mmc_get_configuration(struct burn_drive *d)
fprintf(stderr,"LIBBURN_DEBUG: 46h alloc_len = %d , ret = %d\n",
alloc_len, ret);
*/
if (alloc_len > 8 && ret > 0)
if (alloc_len > 8 && ret > 0) {
if (alloc_len > 4096) {
/* MMC-5 6.6.2.1: The maximum is less than 1 KB */
BURN_ALLOC_MEM(msg, char, 256);
sprintf(msg, "Implausible lenght announcement from SCSI command GET CONFIGURATION: %d", alloc_len);
libdax_msgs_submit(libdax_messenger, d->global_index, 0x000201a9,
LIBDAX_MSGS_SEV_FAILURE, LIBDAX_MSGS_PRIO_ZERO,
msg, 0, 0);
goto ex;
}
/* second execution with announced length */
mmc_get_configuration_al(d, &alloc_len);
}
ex:;
BURN_FREE_MEM(msg);
}
/* ts A70108 */