On error, libxlMakeDomBuildInfo() frees the caller-provided
libxl_domain_build_info struct embedded in libxl_domain_config,
causing a segfault
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f9c13020700 (LWP 40988)]
(gdb) bt
0 0x00007f9c162f95b4 in free () from /lib64/libc.so.6
1 0x00007f9c0d0965ad in libxl_bitmap_dispose () from
/usr/lib64/libxenlight.so.4.4
2 0x00007f9c0d0a73bf in libxl_domain_build_info_dispose ()
from /usr/lib64/libxenlight.so.4.4
3 0x00007f9c0d0a7974 in libxl_domain_config_dispose () from
/usr/lib64/libxenlight.so.4.4
4 0x00007f9c0d2e00c5 in libxlDomainStart (driver=0x7f9c0400e4e0,
vm=0x7f9c0412b0d0, start_paused=false, restore_fd=-1) at
libxl/libxl_domain.c:1323
5 0x00007f9c0d2e1d4b in libxlDomainCreateXML (conn=0x7f9c000009a0,...)
at libxl/libxl_driver.c:660
Remove the call to libxl_domain_build_info_dispose() from
libxlMakeDomBuildInfo(). On error, callers will dispose the
libxl_domain_config object, which in turn disposes the build info.
With the introduction of the libxlDomainGetEmulatorType function,
it is trivial to support a user-specfied <emulator> in the libxl
driver. This patch is based loosely on David Scott's old patch
to do the same
https://www.redhat.com/archives/libvir-list/2013-April/msg02119.html
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
It makes sense for none of the callers to have negative value as an
output and, fortunately, if anyone tried defining domain with negative
memory or any other value parsed by virDomainParseScaledValue(), the
resulting value was 0. That means we can error out during parsing as
it won't break anything.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1155843
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
After cidr_format is allocated by virAsprintf and used by vshPrintExtra
it needs to be freed.
Fix the following memory leak from valgrind:
18 bytes in 1 blocks are definitely lost in loss record 41 of 192
at 0x4C29BBD: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
by 0x85CE36F: __vasprintf_chk (vasprintf_chk.c:80)
by 0x4EE52D5: UnknownInlinedFun (stdio2.h:210)
by 0x4EE52D5: virVasprintfInternal (virstring.c:459)
by 0x4EE53CA: virAsprintfInternal (virstring.c:480)
by 0x14FE96: cmdNetworkDHCPLeases (virsh-network.c:1378)
by 0x13006B: vshCommandRun (virsh.c:1915)
by 0x12A9E1: main (virsh.c:3699)
Signed-off-by: Luyao Huang <lhuang@redhat.com>
The virGetSCSIHostNumber function return type is int, however
its stubbed version returns NULL. That results in a build fail
on systems that use the stubbed version. Fix by using a proper
return type.
Currently, build fails on FreeBSD because its struct ifreq does not
have ifr_hwaddr member. In order to fix that, check if this member
is present, otherwise fall back to the stub version of the
virNetDev{Add,Del}Multi functions.
The complaint is that if cleanup is called when virFileReadAll fails,
then mcast->entries is NULL and could be dereferenced in the clear
function. After following the code some - I saw that the caller to
the function (virNetDevGetMulticastTable) will also call
virNetDevMcastListClear if this function returns -1, so this
isn't necessary, so I removed the call.
Coverity complains that because the for loop is from 0 to 5 (max tokens)
and the impending switch/case statements used each of the #define values
that the 'default' wouldn't reachable. This patch will convert the #define's
into enum's and add the obligatory dead_error_begin marker for these type
situations.
Signed-off-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1140981 reports that
the qemu-kvm shipped as part of RHEL 7.0 intentionally[1] cripples
block jobs by removing the 'block-stream' QMP command, while still
leaving 'block-job-cancel' as an unusable no-op. Meanwhile, we
already had existing code that checked whether block jobs were
completely missing (such as qemu 0.15), old style (cancel is
synchronous, and all commands spelled with '_'), or new style
(cancel is asynchronous, and all commands spelled with '-'), and
used that three-way probe to give decent error messages. At the
time that code was added, all existing qemu versions fell in one
of three buckets, and the code was using the presence of
'block-job-cancel' as the witness of which of the three buckets.
But now that RHEL qemu has shipped with intentionally crippled
'block-stream', we have a fourth bucket, which results in ugly
error messages when trying 'virsh blockpull':
error: Requested operation is not valid: Command 'block-stream' is not found
In reality, the fourth bucket should be treated the same as the
first bucket (no block job support); we can do that by realizing
that no existing build of qemu has working block-stream while
lacking block-job-cancel, so it is easiest to change our witness
to the command that starts a job rather than ends one. We still
act correctly regarding command spelling and whether cancel is
asynchronous. And on crippled RHEL builds, we now get the desired:
error: unsupported configuration: block jobs not supported with this qemu binary
[1] The intentional cripple is limited to qemu-kvm of RHEL; when using
qemu-kvm-rhev of RHEV, block job functionality is supported. Don't ask
me to explain the "why" behind it all - I'm just dealing with fallout
from someone else's decision.
* src/qemu/qemu_capabilities.h (QEMU_CAPS_BLOCKJOB_SYNC): Tweak comment.
* src/qemu/qemu_capabilities.c (virQEMUCapsCommands): Look for stream
rather than cancel when determining the flavor of block jobs supported.
Signed-off-by: Eric Blake <eblake@redhat.com>
The code that parses the schema from the URI touches the "hosts[0]"
member of the storage file source structure in case the URI contains a
schema. The hosts array was not yet allocated at the point in the code
where the transport protocol was parsed and set. This lead to a crash of
libvirtd.
Fix the code by allocating the "hosts" array upfront and add a test case
to verify this scenario. (Unfortunately this requires shuffling the test
case numbers too).
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1156288
Now that all offenders have been cleaned, turn on a syntax-check
rule to prevent future offenders.
* cfg.mk (sc_prohibit_static_zero_init): New rule.
* src/qemu/qemu_driver.c (qemuDomainBlockJobImpl): Avoid false
positive.
Signed-off-by: Eric Blake <eblake@redhat.com>
C guarantees that static variables are zero-initialized. Some older
compilers (and also gcc -fno-zero-initialized-in-bss) create larger
binaries if you explicitly zero-initialize a static variable.
* tests/eventtest.c: Fix initialization.
* tests/testutils.c: Likewise.
* tests/virhostdevtest.c: Likewise.
* tests/virportallocatortest.c: Likewise.
* tests/virscsitest.c: Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
C guarantees that static variables are zero-initialized. Some older
compilers (and also gcc -fno-zero-initialized-in-bss) create larger
binaries if you explicitly zero-initialize a static variable.
* tools/virsh-console.c (got_signal): Drop unused variable.
* tools/virsh-domain.c: Fix initialization.
* tools/virsh.c: Likewise.
* tools/virt-host-validate-common.c (virHostMsgWantEscape):
Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
We weren't ever using the value for anything other than being non-zero.
* src/util/viraudit.h (virAuditLog): Change signature.
* src/util/viraudit.c (virAuditLog): Update user.
* daemon/libvirtd.c (main): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
As I've pushed 5892944f I haven't noticed one small nitpick.
There was this backslash missing on the line 1231 in the
enumeration of libraries to be added to vbox storage driver. This
resulted in nondeterministic build which sometimes succeeded and
sometimes failed.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1146837
Resolve a crash in libvirtd resulting from commit id 'a4bd62ad' (1.0.6)
which added parentaddr and unique_id to allow unique identification of
a scsi_host, but assumed that all the pool entries and the incoming
definition would be similarly defined. If the existing pool uses the
'name' attribute and an incoming pool is using the parentaddr/unique_id,
then the code will attempt to compare the existing name string against
the incoming name string which doesn't exist (is NULL) and results in
a core (STREQ).
Conversely, if the existing pool used the parentaddr/unique_id and the
to be defined pool used the name, then the comparison would be against
the parentaddr, but since the incoming pool doesn't have one - that would
leave the comparison against a parentaddr of all 0's and a unique_id of 0,
which will always comparison to fail. This means someone could define the
same source adapter for two pools
In order to resolve this, adjust the code to get the 'host#' to be used
by the storage scsi backend in order to check/start the pool and make sure
the incoming definition doesn't match any of the existing pool defs.
https://bugzilla.redhat.com/show_bug.cgi?id=1141621
As part of attach processing, assign the device aliases by calling
qemuAssignDeviceAliases during qemuDomainQemuAttach once all the devices
are found after the qemuParseCommandLinePid processing.
This will alleviate a symptom that caused a libvirtd crash during an
attempted device detach.
In qemuDomainDetachControllerDevice if the info.alias already exists
a call to qemuAssignDeviceControllerAlias would overwrite the existing
so avoid this possibility.
Slight adjustment to the qemu-attach man page to note device hotplug
and hot unplug may not work and that the environment should be considered
read-only
Currently remote driver only initializes partial fields of
remote_connect_get_all_domain_stats_args. But xdr_array()
will check the uninitialised field 'doms_val'.
For safty reason, memset all fields of args is better.
Fix the following error from valgrind, like:
==30515== 1 errors in context 1 of 3:
==30515== Conditional jump or move depends on uninitialised value(s)
==30515== at 0x85E9402: xdr_array (xdr_array.c:88)
==30515== by 0x4FD8FC9: xdr_remote_connect_get_all_domain_stats_args (remote_protocol.c:6473)
==30515== by 0x4FE72F2: virNetMessageEncodePayload (virnetmessage.c:350)
==30515== by 0x4FDD21C: virNetClientProgramCall (virnetclientprogram.c:326)
==30515== by 0x4FB4D01: callFull.isra.2 (remote_driver.c:6667)
==30515== by 0x4FCBD45: call (remote_driver.c:6689)
==30515== by 0x4FCBD45: remoteConnectGetAllDomainStats (remote_driver.c:7793)
==30515== by 0x4FA0E75: virConnectGetAllDomainStats (libvirt.c:21678)
==30515== by 0x147FD1: cmdDomstats (virsh-domain-monitor.c:2148)
==30515== by 0x13006B: vshCommandRun (virsh.c:1915)
==30515== by 0x12A9E1: main (virsh.c:3699)
Signed-off-by: Jincheng Miao <jmiao@redhat.com>
After rewriting the whole driver, Only version specified code is
remained in vbox_tmpl.c. So, this patch removes those unused macros
header files in vbox_tmpl.c.
The GetMedium will always return a IHardDisk object them.
In 2.2 and 3.0, it is what GetHardDisk exactly do. In 3.1 and later,
The IMedium is same as IHardDisk.
The CreateHardDiskMedium only support create HardDisk for medium
type, and it only works when vbox version >= 3.1. This patch make
the function workable with all vbox versions and rename it as
CreateHardDisk.
In vbox 2.2 and 3.0 this function will create a IHardDisk object.
In vbox later than 3.0, this function will create a IMedium object.
In old version, function FindMedium in UIVirtualBox doesn't work
for vbox2.2 and 3.0. We assume it will not be used when vbox in
these versions.
But when rewriting vboxStorageVolLookupByPath, we found it was
compatibe to use FindMedium to get a IHardDisk object, even in
vbox old versions. To achieve this, first make FindMedium call
FindHardDisk when VBOX_API_VERSION < 4000000.
Then change the argument type **IMedium to **IHardDisk. (As the
rules in heriachy, we can't transfer a IHardDisk to match
IMedium in output)
In vbox 2.2 and 3.0, the caller must be aware that they will get
a IHardDisk object in return.
We use typedef IMedium IHardDisk to make IHardDisk hierachy from
IMedium (Actually it did on vbox 2.2 and 3.0's C++ API).
So when calling
VBOX_MEDIUM_FUNC_ARG*(IHardDisk, func, args)
we can directly replace it to
gVBoxAPI.UIMedium.func(IHardDisk, args)
When dealing with this two types, we get some rules from it's
hierachy relationship.
When using IHardDisk and IMedium as input, we can't transfer a
IMedium to IHardDisk. Like:
gVBoxAPI.UIHardDisk.func(IHardDisk *hardDisk, args)
Here, we can't put a *IMedium as a argument.
When using IHardDisk and IMedium as output, we can't transfer a
IHardDisk to IMedium. Like:
gVBoxAPI.UIMachine.GetMedium(IMedium **out)
Here, we can't put a **IHardDisk as a argument. If this case
do happen, we either change the API to GetHardDisk or write a
new one.
This patch rewrites the following functions
*vboxStorageOpen
*vboxStorageClose
*vboxConnectNumOfStoragePools
*vboxConnectListStoragePools
*vboxStoragePoolLookupByName
These functions do not call any vbox API, so I directly move it
from vbox_tmpl.c to vbox_storage.c
A small improvement is made on vboxConnectListStoragePools.
The if condition nnames == 1 is modified to nnames > 0. So if the
caller put more than one slot to get active storage pools, the new
function will return exactly one, while the old one would only
return 0.
