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| author |   Borislav Petkov (AMD) <bp@alien8.de> | 2023-08-05 00:06:43 +0200 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2023-08-09 07:55:00 -0700 |
| commit | 77245f1c3c6495521f6a3af082696ee2f8ce3921 (patch) | |
| tree | fca77ee5bfe3c557f190f201e39a82688f9ac9b4 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | Merge tag 'hardening-v6.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux (diff) | |
| download | wireguard-linux-77245f1c3c6495521f6a3af082696ee2f8ce3921.tar.xz wireguard-linux-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) <bp@alien8.de>
Cc: <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions