Date: Tue, 07 Jun 2022 15:21:36 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 264521] bhyve's pci_vtscsi_request_handle() can read beyond allocated heap object Message-ID: <bug-264521-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264521 Bug ID: 264521 Summary: bhyve's pci_vtscsi_request_handle() can read beyond allocated heap object Product: Base System Version: Unspecified Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: bhyve Assignee: virtualization@FreeBSD.org Reporter: rtm@lcs.mit.edu Bhyve's pci_vtscsi_request_handle() says: iov_to_buf(iov_in, niov_in, (void **)&cmd_rd); ...; io->io_hdr.nexus.targ_lun =3D pci_vtscsi_get_lun(cmd_rd->lun); // and further uses of cmd_rd If the guest driver provided no readable virtio descriptors, then niov_in will be zero, and iov_to_buf() will cause cmd_rd to point to a zero-length heap object. If there is a readable descriptor, but it's smaller than sizeof(cmd_rd), there's also a problem. --=20 You are receiving this mail because: You are the assignee for the bug.=
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