diff options
| author | Borislav Petkov (AMD) <[email protected]> | 2023-08-05 00:06:43 +0200 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2023-08-09 07:55:00 -0700 |
| commit | 77245f1c3c6495521f6a3af082696ee2f8ce3921 (patch) | |
| tree | fca77ee5bfe3c557f190f201e39a82688f9ac9b4 /lib/test-string_helpers.c | |
| parent | 13b9372068660fe4f7023f43081067376582ef3c (diff) | |
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 'lib/test-string_helpers.c')
0 files changed, 0 insertions, 0 deletions