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| author |   guenther <guenther@openbsd.org> | 2018-06-14 19:57:29 +0000 |
|---|---|---|
| committer | guenther <guenther@openbsd.org> | 2018-06-14 19:57:29 +0000 |
| commit | f0f07b0b67d7c76ec94d2e5d5c83b1f57878cf69 (patch) | |
| tree | 0b2090d9ea0c46dea6470ed1ae040af50d7fb7a7 /sys/kern/tty.c | |
| parent | Return from magic_test does not need to be copied because the caller (diff) | |
| download | wireguard-openbsd-f0f07b0b67d7c76ec94d2e5d5c83b1f57878cf69.tar.xz wireguard-openbsd-f0f07b0b67d7c76ec94d2e5d5c83b1f57878cf69.zip | |
Clear the GPRs when entering the kernel from userspace so that
user-controlled values can't take part in speculative execution in
the kernel down paths that end up "not taken" but that may cause
user-visible effects (cache, etc).
prodded by dragonflybsd commit 9474cbef7fcb61cd268019694d94db6a75af7dbe
ok deraadt@ kettenis@
Diffstat (limited to 'sys/kern/tty.c')
0 files changed, 0 insertions, 0 deletions