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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 22:55:45 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 22:55:45 +0000 |
| commit | 04aecf1372d30eb709d8de65152535ab66dcb74a (patch) | |
| tree | d1e4d8c453a76465e8b63119314a28d39b474479 /src/VBox/VMM/VMMAll/PGMAllPhys.cpp | |
| parent | Adding upstream version 7.0.14-dfsg. (diff) | |
| download | virtualbox-04aecf1372d30eb709d8de65152535ab66dcb74a.tar.xz virtualbox-04aecf1372d30eb709d8de65152535ab66dcb74a.zip | |
Adding upstream version 7.0.16-dfsg.upstream/7.0.16-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/VMM/VMMAll/PGMAllPhys.cpp')
| -rw-r--r-- | src/VBox/VMM/VMMAll/PGMAllPhys.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/VBox/VMM/VMMAll/PGMAllPhys.cpp b/src/VBox/VMM/VMMAll/PGMAllPhys.cpp index 457f7de0..9aa351d9 100644 --- a/src/VBox/VMM/VMMAll/PGMAllPhys.cpp +++ b/src/VBox/VMM/VMMAll/PGMAllPhys.cpp @@ -2504,6 +2504,11 @@ static VBOXSTRICTRC pgmPhysReadHandler(PVMCC pVM, PPGMPAGE pPage, RTGCPHYS GCPhy /* Release the PGM lock as MMIO handlers take the IOM lock. (deadlock prevention) */ PGM_UNLOCK(pVM); + /* If the access origins with a device, make sure the buffer is initialized + as a guard against leaking heap, stack and other info via badly written + MMIO handling. @bugref{10651} */ + if (enmOrigin == PGMACCESSORIGIN_DEVICE) + memset(pvBuf, 0xff, cb); rcStrict = pfnHandler(pVM, pVCpu, GCPhys, (void *)pvSrc, pvBuf, cb, PGMACCESSTYPE_READ, enmOrigin, uUser); PGM_LOCK_VOID(pVM); |