* [Qemu-devel] [PATCH] block/iscsi: validate block size returned from target
@ 2015-08-14 11:33 Peter Lieven
2015-08-31 8:38 ` Peter Lieven
0 siblings, 1 reply; 3+ messages in thread
From: Peter Lieven @ 2015-08-14 11:33 UTC (permalink / raw)
To: qemu-devel, qemu-block
Cc: pbonzini, andrey, Peter Lieven, qemu-stable, ronniesahlberg
It has been reported that at least tgtd returns a block size of 0
for LUN 0. To avoid running into divide by zero later on and protect
against other problematic block sizes validate the block size right
at connection time.
Cc: qemu-stable@nongnu.org
Reported-by: Andrey Korolyov <andrey@xdel.ru>
Signed-off-by: Peter Lieven <pl@kamp.de>
---
block/iscsi.c | 4 ++++
dtc | 2 +-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/block/iscsi.c b/block/iscsi.c
index 5002916..fac3a7a 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1214,6 +1214,10 @@ static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp)
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
error_setg(errp, "iSCSI: failed to send readcapacity10 command.");
+ } else if (!iscsilun->block_size ||
+ iscsilun->block_size % BDRV_SECTOR_SIZE) {
+ error_setg(errp, "iSCSI: the target returned an invalid "
+ "block size of %d.", iscsilun->block_size);
}
if (task) {
scsi_free_scsi_task(task);
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH] block/iscsi: validate block size returned from target
2015-08-14 11:33 [Qemu-devel] [PATCH] block/iscsi: validate block size returned from target Peter Lieven
@ 2015-08-31 8:38 ` Peter Lieven
2015-09-07 10:39 ` Paolo Bonzini
0 siblings, 1 reply; 3+ messages in thread
From: Peter Lieven @ 2015-08-31 8:38 UTC (permalink / raw)
To: qemu-devel, qemu-block; +Cc: pbonzini, andrey, qemu-stable, ronniesahlberg
Am 14.08.2015 um 13:33 schrieb Peter Lieven:
> It has been reported that at least tgtd returns a block size of 0
> for LUN 0. To avoid running into divide by zero later on and protect
> against other problematic block sizes validate the block size right
> at connection time.
>
> Cc: qemu-stable@nongnu.org
> Reported-by: Andrey Korolyov <andrey@xdel.ru>
> Signed-off-by: Peter Lieven <pl@kamp.de>
> ---
> block/iscsi.c | 4 ++++
> dtc | 2 +-
> 2 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/block/iscsi.c b/block/iscsi.c
> index 5002916..fac3a7a 100644
> --- a/block/iscsi.c
> +++ b/block/iscsi.c
> @@ -1214,6 +1214,10 @@ static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp)
>
> if (task == NULL || task->status != SCSI_STATUS_GOOD) {
> error_setg(errp, "iSCSI: failed to send readcapacity10 command.");
> + } else if (!iscsilun->block_size ||
> + iscsilun->block_size % BDRV_SECTOR_SIZE) {
> + error_setg(errp, "iSCSI: the target returned an invalid "
> + "block size of %d.", iscsilun->block_size);
> }
> if (task) {
> scsi_free_scsi_task(task);
Ping
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH] block/iscsi: validate block size returned from target
2015-08-31 8:38 ` Peter Lieven
@ 2015-09-07 10:39 ` Paolo Bonzini
0 siblings, 0 replies; 3+ messages in thread
From: Paolo Bonzini @ 2015-09-07 10:39 UTC (permalink / raw)
To: Peter Lieven, qemu-devel, qemu-block; +Cc: andrey, qemu-stable, ronniesahlberg
On 31/08/2015 10:38, Peter Lieven wrote:
>>
>> diff --git a/block/iscsi.c b/block/iscsi.c
>> index 5002916..fac3a7a 100644
>> --- a/block/iscsi.c
>> +++ b/block/iscsi.c
>> @@ -1214,6 +1214,10 @@ static void iscsi_readcapacity_sync(IscsiLun
>> *iscsilun, Error **errp)
>> if (task == NULL || task->status != SCSI_STATUS_GOOD) {
>> error_setg(errp, "iSCSI: failed to send readcapacity10
>> command.");
>> + } else if (!iscsilun->block_size ||
>> + iscsilun->block_size % BDRV_SECTOR_SIZE) {
>> + error_setg(errp, "iSCSI: the target returned an invalid "
>> + "block size of %d.", iscsilun->block_size);
>> }
>> if (task) {
>> scsi_free_scsi_task(task);
>
> Ping
Queued but not sent due to KVM Forum and vacation.
Paolo
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2015-09-07 10:40 UTC | newest]
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2015-08-14 11:33 [Qemu-devel] [PATCH] block/iscsi: validate block size returned from target Peter Lieven
2015-08-31 8:38 ` Peter Lieven
2015-09-07 10:39 ` Paolo Bonzini
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