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authorPawan Gupta <pawan.kumar.gupta@linux.intel.com>2024-09-25 15:25:44 -0700
committerDave Hansen <dave.hansen@linux.intel.com>2024-10-08 15:16:28 -0700
commit48a2440d0f20c826b884e04377ccc1e4696c84e9 (patch)
tree395e54f3197e32ca370f7fe8b3a698e89d8162f7 /mm
parent2e2e5143d4868163d6756c8c6a4d28cbfa5245e5 (diff)
x86/entry_32: Clear CPU buffers after register restore in NMI return
CPU buffers are currently cleared after call to exc_nmi, but before register state is restored. This may be okay for MDS mitigation but not for RDFS. Because RDFS mitigation requires CPU buffers to be cleared when registers don't have any sensitive data. Move CLEAR_CPU_BUFFERS after RESTORE_ALL_NMI. Fixes: a0e2dab44d22 ("x86/entry_32: Add VERW just before userspace transition") Suggested-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc:stable@vger.kernel.org Link: https://lore.kernel.org/all/20240925-fix-dosemu-vm86-v7-2-1de0daca2d42%40linux.intel.com
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions