diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-06-07 18:10:29 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-06-20 17:28:44 -0400 |
| commit | d81473840ce12fe682c19af9b4b5b39a9fe5a4c9 (patch) | |
| tree | a28f2825fd4db9e4f9a25df9654ee3e978f7c6ae /virt | |
| parent | f99b052256f16224687e5947772f0942bff73fc1 (diff) | |
| download | lwn-d81473840ce12fe682c19af9b4b5b39a9fe5a4c9.tar.gz lwn-d81473840ce12fe682c19af9b4b5b39a9fe5a4c9.zip | |
KVM: interrupt kvm_gmem_populate() on signals
kvm_gmem_populate() is a potentially lengthy operation that can involve
multiple calls to the firmware. Interrupt it if a signal arrives.
Fixes: 1f6c06b177513 ("KVM: guest_memfd: Add interface for populating gmem pages with user data")
Cc: Isaku Yamahata <isaku.yamahata@intel.com>
Cc: Michael Roth <michael.roth@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/guest_memfd.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c index 9714add38852..3bfe1824ec2d 100644 --- a/virt/kvm/guest_memfd.c +++ b/virt/kvm/guest_memfd.c @@ -629,6 +629,11 @@ long kvm_gmem_populate(struct kvm *kvm, gfn_t start_gfn, void __user *src, long gfn_t gfn = start_gfn + i; kvm_pfn_t pfn; + if (signal_pending(current)) { + ret = -EINTR; + break; + } + ret = __kvm_gmem_get_pfn(file, slot, gfn, &pfn, &max_order, false); if (ret) break; |