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Pierre Pronchery d19fa9c1b7 vmm: avoid potential KASSERT kernel panic in vm_handle_db
If the guest VM emits the exit code VM_EXITCODE_DB the kernel will
execute the function named vm_handle_db.

If the value of rsp is not page aligned and if rsp+sizeof(uint64_t)
spans across two pages, the function vm_copy_setup will need two structs
vm_copyinfo to prepare the copy operation.

For instance is rsp value is 0xFFC, two vm_copyinfo objects are needed:

* address=0xFFC, len=4
* address=0x1000, len=4

The vulnerability was addressed by commit 51fda658ba ("vmm: Properly
handle writes spanning across two pages in vm_handle_db").  Still,
replace the KASSERT with an error return as a more defensive approach.

Reported by:    Synacktiv
Reviewed by	markj, emaste
Security:       HYP-09
Sponsored by:   The Alpha-Omega Project
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D46133
2024-10-02 12:58:45 -04:00
.cirrus-ci Cirrus-CI: add some timing info on pkg install failure 2021-08-04 15:02:00 -04:00
.github CODEOWNERS: Add nuageinit 2024-07-25 11:15:29 +02:00
bin timeout(1): Update STANDARDS section 2024-09-24 18:42:18 +02:00
cddl dtrace tests: Add a test case which validates FBT probe arguments 2024-09-19 09:22:03 +00:00
contrib libdiff: Implement diff coloring. 2024-10-02 17:55:06 +02:00
crypto openssl: Remove the specific version numbers from the instructions. 2024-09-08 09:45:31 -07:00
etc libmd: split tests out into the test infrastructure 2024-09-29 22:34:19 -05:00
gnu Remove residual blank line at start of Makefile 2024-07-15 16:43:39 -06:00
include Revert "stdio.h: don't expose rsize_t unless __EXT1_VISIBLE" 2024-10-02 08:51:56 -07:00
kerberos5 Remove residual blank line at start of Makefile 2024-07-15 16:43:39 -06:00
lib sysent: regen comments 2024-10-01 18:46:40 +01:00
libexec Fix the cross-build after recent commits 2024-09-30 00:08:49 -05:00
release release: basic-cloudinit improve default image 2024-09-26 13:01:03 +02:00
rescue Remove residual blank line at start of Makefile 2024-07-15 16:43:39 -06:00
sbin pf: fold pf_test_fragment() into pf_test_rule() 2024-10-01 09:55:13 +02:00
secure Update config/build info for OpenSSL 3.0.15 2024-09-07 21:34:18 -07:00
share khelp: Sprinkle const qualifiers where appropriate 2024-10-01 23:28:37 +08:00
stand btx: Align the PXE prompt with other options 2024-09-30 15:41:42 -04:00
sys vmm: avoid potential KASSERT kernel panic in vm_handle_db 2024-10-02 12:58:45 -04:00
targets mergemaster: remove from the tree 2024-07-16 08:25:54 -04:00
tests pf tests: use unique pid files for inetd processes 2024-10-02 12:03:19 +02:00
tools Build BSD diff3 if GNU diff3 is disabled. 2024-10-02 17:55:06 +02:00
usr.bin locate.updatedb: Revert to using cat to copy the db. 2024-10-02 17:55:06 +02:00
usr.sbin acpidump: add 's' option to parse dsdt and ssdt's separately. In some machine, they may not be parsed if they are concatinated into one image. 2024-10-02 15:36:41 +09:00
.arcconfig arcanist: use FreeBSD/git project repository instead of FreeBSD/svn 2022-08-23 14:16:41 +00:00
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.cirrus.yml Cirrus-CI: switch to llvm18 by default 2024-04-07 17:23:25 -04:00
.clang-format clang-format: Minor tweaks 2024-04-30 17:33:43 -04:00
.git-blame-ignore-revs iflib: Ignore fa7045f99c in blame 2024-09-22 10:09:29 +08:00
.gitattributes Remove SVN related Git attributes 2023-12-26 10:28:28 -07:00
.gitignore Vendor import of OpenSSH 9.7p1 2024-03-17 13:47:10 -04:00
.mailmap mailmap: Translate my personal address 2024-06-22 08:57:56 +02:00
CONTRIBUTING.md openssl: Import OpenSSL 3.0.15. 2024-09-03 20:56:17 -07:00
COPYRIGHT copyright: Bump the copyright date. 2023-12-31 23:15:43 -07:00
LOCKS Update LOCKS for Git 2023-12-26 10:28:25 -07:00
MAINTAINERS man filesystems: fix more xrefs after move to s4 2024-06-27 18:32:05 -06:00
Makefile armv6: Remove support for building armv6 2024-07-12 11:31:53 +00:00
Makefile.inc1 Makefile.inc1: make pkg-create(8) compression level overridable 2024-09-21 07:40:11 -06:00
Makefile.libcompat Remove residual blank line at start of Makefile 2024-07-15 16:43:39 -06:00
Makefile.sys.inc Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:55:03 -06:00
ObsoleteFiles.inc ObsoleteFiles: fix the libmd.so version bump order 2024-09-30 14:59:37 -05:00
README.md Update README.md to add pointer to release page. 2024-05-09 20:40:46 -06:00
RELNOTES RELNOTES: RSA host keys for SSH are deprecated 2024-09-27 09:28:44 -07:00
UPDATING UPDATING: increase visibility of footnotes 2024-09-06 12:34:33 -06:00

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