a7y18lte-ubports/android_kernel_samsung_universal7885
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target: Fix VERIFY_16 handling in sbc_parse_cdb

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commit 13603685c1f12c67a7a2427f00b63f39a2b6f7c9 upstream.

As reported by Max, the Windows 2008 R2 chkdsk utility expects
VERIFY_16 to be supported, and does not handle the returned
CHECK_CONDITION properly, resulting in an infinite loop.

The kernel will log huge amounts of this error:

kernel: TARGET_CORE[iSCSI]: Unsupported SCSI Opcode 0x8f, sending
CHECK_CONDITION.

Signed-off-by: Max Lohrmann <post@wickenrode.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Max Lohrmann 2017-03-07 22:09:56 -08:00 committed by Greg Kroah-Hartman
parent 246760c61d
commit d267ecbdfd
1 changed files with 8 additions and 2 deletions
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10
drivers/target/target_core_sbc.c
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@ -1096,9 +1096,15 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
return ret;
break;
case VERIFY:
case VERIFY_16:
size = 0;
sectors = transport_get_sectors_10(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
if (cdb[0] == VERIFY) {
sectors = transport_get_sectors_10(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
} else {
sectors = transport_get_sectors_16(cdb);
cmd->t_task_lba = transport_lba_64(cdb);
}
cmd->execute_cmd = sbc_emulate_noop;
goto check_lba;
case REZERO_UNIT: