7:05 a.m.
The private data of a virStorageSource which is backing an iSCSI hostdev
may be NULL if no authentication is present. The code handling the
hotplug would attempt to extract the authentication info stored in
'secinfo' without checking if it is allocated which resulted in a crash.
Here we opt the easy way to check if srcPriv is not NULL so that we
don't duplicate all the logic which selects whether the disk source has
a secret.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1597550
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_hotplug.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index fcd8eb0ffa..075f2fb72e 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2240,7 +2240,8 @@ qemuDomainAttachHostSCSIDevice(virQEMUDriverPtr driver,
if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI) {
qemuDomainStorageSourcePrivatePtr srcPriv =
QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(scsisrc->u.iscsi.src);
- secinfo = srcPriv->secinfo;
+ if (srcPriv)
+ secinfo = srcPriv->secinfo;
}
if (secinfo && secinfo->type == VIR_DOMAIN_SECRET_INFO_TYPE_AES) {
--
2.16.2
8:34 a.m.
On 07/03/2018 08:05 AM, Peter Krempa wrote:
The private data of a virStorageSource which is backing an iSCSI
hostdev
may be NULL if no authentication is present. The code handling the
hotplug would attempt to extract the authentication info stored in
'secinfo' without checking if it is allocated which resulted in a crash.
Here we opt the easy way to check if srcPriv is not NULL so that we
don't duplicate all the logic which selects whether the disk source has
a secret.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1597550
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_hotplug.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Reviewed-by: John Ferlan <jferlan(a)redhat.com>
John
Feels like we've done this before...
97202988 <sigh> and 6050affb7f
9:22 a.m.
On Tue, Jul 03, 2018 at 09:34:56 -0400, John Ferlan wrote:
On 07/03/2018 08:05 AM, Peter Krempa wrote:
> The private data of a virStorageSource which is backing an iSCSI hostdev
> may be NULL if no authentication is present. The code handling the
> hotplug would attempt to extract the authentication info stored in
> 'secinfo' without checking if it is allocated which resulted in a crash.
>
> Here we opt the easy way to check if srcPriv is not NULL so that we
> don't duplicate all the logic which selects whether the disk source has
> a secret.
>
> Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1597550
>
> Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
> ---
> src/qemu/qemu_hotplug.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
Reviewed-by: John Ferlan <jferlan(a)redhat.com>
John
Feels like we've done this before...
97202988 <sigh> and 6050affb7f
Specifically the former commit was not good enough to cover this case
despite touching this code.
10:05 a.m.
On Tue, Jul 03, 2018 at 04:22 PM +0200, Peter Krempa <pkrempa(a)redhat.com> wrote:
On Tue, Jul 03, 2018 at 09:34:56 -0400, John Ferlan wrote:
>
>
> On 07/03/2018 08:05 AM, Peter Krempa wrote:
> > The private data of a virStorageSource which is backing an iSCSI hostdev
> > may be NULL if no authentication is present. The code handling the
> > hotplug would attempt to extract the authentication info stored in
> > 'secinfo' without checking if it is allocated which resulted in a
crash.
> >
> > Here we opt the easy way to check if srcPriv is not NULL so that we
> > don't duplicate all the logic which selects whether the disk source has
> > a secret.
> >
> > Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1597550
> >
> > Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
> > ---
> > src/qemu/qemu_hotplug.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
>
> Reviewed-by: John Ferlan <jferlan(a)redhat.com>
>
> John
>
> Feels like we've done this before...
>
> 97202988 <sigh> and 6050affb7f
Specifically the former commit was not good enough to cover this case
despite touching this code.
Would it make sense to always allocate the
qemuDomainStorageSourcePrivate struct? We’d be wasting some memory, but
at the same time the code would be easier to read and less prone to
error. e.g. qemuDomainDeviceDiskDefPostParseRestoreSecAlias would be
simpler.
For the privateData of virConnect, virDomainVsockDef, virDisk,
virDomainVcpu… it’s implemented this way.
Anyway: Reviewed-by: Marc Hartmayer <mhartmay(a)linux.ibm.com> and thanks
for fixing it!
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Marc Hartmayer
IBM Deutschland Research & Development GmbH
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Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294
2:12 a.m.
On Tue, Jul 03, 2018 at 17:05:31 +0200, Marc Hartmayer wrote:
On Tue, Jul 03, 2018 at 04:22 PM +0200, Peter Krempa
<pkrempa(a)redhat.com> wrote:
> On Tue, Jul 03, 2018 at 09:34:56 -0400, John Ferlan wrote:
>> Feels like we've done this before...
>>
>> 97202988 <sigh> and 6050affb7f
>
> Specifically the former commit was not good enough to cover this case
> despite touching this code.
Would it make sense to always allocate the
qemuDomainStorageSourcePrivate struct? We’d be wasting some memory, but
at the same time the code would be easier to read and less prone to
error. e.g. qemuDomainDeviceDiskDefPostParseRestoreSecAlias would be
simpler.
For the privateData of virConnect, virDomainVsockDef, virDisk,
virDomainVcpu… it’s implemented this way.
Anyway: Reviewed-by: Marc Hartmayer <mhartmay(a)linux.ibm.com> and thanks
for fixing it!
virStorageSource is not allocated using a helper so this would require
refactoring all allocations and passing in of the private data structure
which contains the callback to allocate the private data. I was thinking
about it but did not find fixing it compelling enough to do it myself.
2368
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4 comments
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participants (3)
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Peter Krempa