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| author | Borislav Petkov (AMD) <[email protected]> | 2023-08-04 22:06:43 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2023-08-09 14:55:00 +0000 |
| commit | 77245f1c3c6495521f6a3af082696ee2f8ce3921 (patch) | |
| tree | fca77ee5bfe3c557f190f201e39a82688f9ac9b4 /tools/perf/util/c++/clang.cpp | |
| parent | Merge tag 'hardening-v6.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff) | |
| download | kernel-77245f1c3c6495521f6a3af082696ee2f8ce3921.tar.gz kernel-77245f1c3c6495521f6a3af082696ee2f8ce3921.zip | |
x86/CPU/AMD: Do not leak quotient data after a division by 0
Under certain circumstances, an integer division by 0 which faults, can
leave stale quotient data from a previous division operation on Zen1
microarchitectures.
Do a dummy division 0/1 before returning from the #DE exception handler
in order to avoid any leaks of potentially sensitive data.
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Cc: <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/util/c++/clang.cpp')
0 files changed, 0 insertions, 0 deletions