| commit | bbc220abf9c3e4dbfb7372596661f580fb15a7c8 | |
| author | Linus Torvalds <torvalds@linux-foundation.org> | |
| Sun, 12 Jan 2014 03:15:52 +0000 (11 19:15 -0800) | ||
| committer | Ben Hutchings <ben@decadent.org.uk> | |
| Sat, 15 Feb 2014 19:20:11 +0000 (15 19:20 +0000) | ||
| tree | 65f82420640b032463220430e70fd9fa6a3364af | treesnapshot (tar.gz zip) |
| parent | 6aa82e036079eaf208bd581c201dc61c9200bb2e | commitdiff |
x86, fpu, amd: Clear exceptions in AMD FXSAVE workaround
commit 26bef1318adc1b3a530ecc807ef99346db2aa8b0 upstream.
Before we do an EMMS in the AMD FXSAVE information leak workaround we
need to clear any pending exceptions, otherwise we trap with a
floating-point exception inside this code.
Reported-by: halfdog <me@halfdog.net>
Tested-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/CA%2B55aFxQnY_PCG_n4=0w-VG=YLXL-yr7oMxyy0WU2gCBAf3ydg@mail.gmail.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
[bwh: Backported to 3.2: adjust filename, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
commit 26bef1318adc1b3a530ecc807ef99346db2aa8b0 upstream.
Before we do an EMMS in the AMD FXSAVE information leak workaround we
need to clear any pending exceptions, otherwise we trap with a
floating-point exception inside this code.
Reported-by: halfdog <me@halfdog.net>
Tested-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/CA%2B55aFxQnY_PCG_n4=0w-VG=YLXL-yr7oMxyy0WU2gCBAf3ydg@mail.gmail.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
[bwh: Backported to 3.2: adjust filename, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| arch/x86/kernel/traps.c | diffblobblamehistory |