]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
projects / thirdparty / kernel / stable.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: 474e00b) | patch
x86/CPU: Fix FPDSS on Zen1
authorBorislav Petkov (AMD) <bp@alien8.de>
Tue, 7 Apr 2026 09:40:03 +0000 (11:40 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 18 Apr 2026 08:46:48 +0000 (10:46 +0200)
commite6af5286efe5a56128b34032572c9ce9ebeccda3
tree9c8c6d816b26c2812b653126972c9ba67e2a9ce5tree | snapshot
parent474e00b935db250cac320d10c1d3cf4e44b46721commit | diff
x86/CPU: Fix FPDSS on Zen1

commit e55d98e7756135f32150b9b8f75d580d0d4b2dd3 upstream.

Zen1's hardware divider can leave, under certain circumstances, partial
results from previous operations.  Those results can be leaked by
another, attacker thread.

Fix that with a chicken bit.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/x86/include/asm/msr-index.h diff | blob | blame | history
arch/x86/kernel/cpu/amd.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git