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| author | Paolo Bonzini <pbonzini@redhat.com> | 2017-06-27 16:45:09 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-06-27 16:45:09 +0300 |
| commit | 525df86145bf731af522ba9b3982c5b48078b81a (patch) | |
| tree | 76d7f38890872d6e6b4a3c7ae3dc4b16165edfb5 | |
| parent | 039c5d1b2c5f249f5a291215eb5f0eb0afd54f81 (diff) | |
| download | linux-525df86145bf731af522ba9b3982c5b48078b81a.tar.xz | |
KVM: explain missing kvm_put_kvm in case of failure
The call to kvm_put_kvm was removed from error handling in commit
506cfba9e726 ("KVM: don't use anon_inode_getfd() before possible
failures"), but it is _not_ a memory leak. Reuse Al's explanation
to avoid that someone else makes the same mistake.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | virt/kvm/kvm_main.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 3863cf7ae1a3..19f0ecb9b93e 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -3191,6 +3191,12 @@ static int kvm_dev_ioctl_create_vm(unsigned long type) return PTR_ERR(file); } + /* + * Don't call kvm_put_kvm anymore at this point; file->f_op is + * already set, with ->release() being kvm_vm_release(). In error + * cases it will be called by the final fput(file) and will take + * care of doing kvm_put_kvm(kvm). + */ if (kvm_create_vm_debugfs(kvm, r) < 0) { put_unused_fd(r); fput(file); |