[libvirt] [PATCH for 5.10] Revert "qemu: Don't repeat virDomainObjEndAPI in qemuDomainBlockPull"

This reverts commit 421c9550f5446729b513ee50f5c44e6f6969b5a2. qemuDomainBlockPullCommon calls virDomainObjEndAPI internally so the original commit made us shed two references of @vm instead of one getting us into a premature free of @vm. This is not a straight revert as qemuDomainBlockPull was modified meanwhile. I've also added a warning comment that @vm is consumed. https://bugzilla.redhat.com/show_bug.cgi?id=1777230 Signed-off-by: Peter Krempa <pkrempa@redhat.com> --- /me hides in shame src/qemu/qemu_driver.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 669c12d6ca..8c2670d377 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -18443,24 +18443,23 @@ qemuDomainBlockPull(virDomainPtr dom, const char *path, unsigned long bandwidth, unsigned int flags) { virDomainObjPtr vm; - int ret = -1; - virCheckFlags(VIR_DOMAIN_BLOCK_PULL_BANDWIDTH_BYTES, -1); if (!(vm = qemuDomainObjFromDomain(dom))) return -1; - if (virDomainBlockPullEnsureACL(dom->conn, vm->def) < 0) - goto cleanup; - - if (qemuDomainSupportsCheckpointsBlockjobs(vm) < 0) - goto cleanup; + if (virDomainBlockPullEnsureACL(dom->conn, vm->def) < 0) { + virDomainObjEndAPI(&vm); + return -1; + } - ret = qemuDomainBlockPullCommon(vm, path, NULL, bandwidth, flags); + if (qemuDomainSupportsCheckpointsBlockjobs(vm) < 0) { + virDomainObjEndAPI(&vm); + return -1; + } - cleanup: - virDomainObjEndAPI(&vm); - return ret; + /* qemuDomainBlockPullCommon consumes the reference on @vm */ + return qemuDomainBlockPullCommon(vm, path, NULL, bandwidth, flags); } -- 2.23.0

On Wed, Nov 27, 2019 at 01:52:23PM +0100, Peter Krempa wrote:
This reverts commit 421c9550f5446729b513ee50f5c44e6f6969b5a2.
Feel free to demote this from a sentence by removing the trailing period, to make it easier to select.
qemuDomainBlockPullCommon calls virDomainObjEndAPI internally so the original commit made us shed two references of @vm instead of one getting us into a premature free of @vm.
This is not a straight revert as qemuDomainBlockPull was modified meanwhile. I've also added a warning comment that @vm is consumed.
https://bugzilla.redhat.com/show_bug.cgi?id=1777230
Signed-off-by: Peter Krempa <pkrempa@redhat.com> ---
/me hides in shame
src/qemu/qemu_driver.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-)
Reviewed-by: Ján Tomko <jtomko@redhat.com> Jano
participants (2)
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Ján Tomko
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Peter Krempa