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Avoided SIGSEGV with an old SCSI CD-ROM drive and its wild replies

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This commit is contained in:
Thomas Schmitt 2007-04-10 14:46:46 +00:00
parent 047f9c75f5
commit a78e6f9b29
3 changed files with 17 additions and 1 deletions
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2
cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2007.04.10.083119"
#define Cdrskin_timestamP "2007.04.10.144840"

1
libburn/libdax_msgs.h
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@ -366,6 +366,7 @@ Range "scdbackup" : 0x00020000 to 0x0002ffff
0x00020139 (SORRY,HIGH) = Write job parameters are unsuitable
0x0002013a (FATAL,HIGH) = No suitable media detected
0x0002013b (FATAL,HIGH) = Failed to fcntl-lock device
0x0002013c (SORRY,HIGH) = Malformed capabilities page 2Ah received
libdax_audioxtr:
0x00020200 (SORRY,HIGH) = Cannot open audio source file

15
libburn/spc.c
View File

@ -171,6 +171,7 @@ void spc_sense_caps(struct burn_drive *d)
/* ts A61225 : 1 = report about post-MMC-1 speed descriptors */
static int speed_debug = 0;
memset(&buf, 0, sizeof(buf));
memcpy(c.opcode, SPC_MODE_SENSE, sizeof(SPC_MODE_SENSE));
c.retry = 1;
c.oplen = sizeof(SPC_MODE_SENSE);
@ -180,6 +181,8 @@ void spc_sense_caps(struct burn_drive *d)
c.page->sectors = 0;
c.dir = FROM_DRIVE;
d->issue_command(d, &c);
if (c.error)
memset(&buf, 0, sizeof(buf));
size = c.page->data[0] * 256 + c.page->data[1];
m = d->mdata;
@ -241,6 +244,18 @@ void spc_sense_caps(struct burn_drive *d)
num_write_speeds = page[30] * 256 + page[31];
m->max_write_speed = m->min_write_speed = m->cur_write_speed;
if (32 + 4 * num_write_speeds > page_length + 2) {
char msg[161];
sprintf(msg, "Malformed capabilities page 2Ah received (len=%d, #speeds=%d)", page_length, num_write_speeds);
libdax_msgs_submit(libdax_messenger, d->global_index,
0x0002013c,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
msg, 0, 0);
return;
}
for (i = 0; i < num_write_speeds; i++) {
speed = page[32 + 4*i + 2] * 256 + page[32 + 4*i + 3];