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| author | Yu-cheng Yu <yu-cheng.yu@intel.com> | 2020-01-09 13:14:50 -0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-02-11 19:54:04 +0100 |
| commit | c12e13dcd814023a903399ec5ac2e7082d664b8b (patch) | |
| tree | 82de601013579408aeb9bc2cc8021188e2188c30 /kernel/bpf/stackmap.c | |
| parent | bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9 (diff) | |
x86/fpu/xstate: Fix last_good_offset in setup_xstate_features()
The function setup_xstate_features() uses CPUID to find each xfeature's
standard-format offset and size. Since XSAVES always uses the compacted
format, supervisor xstates are *NEVER* in the standard-format and their
offsets are left as -1's. However, they are still being tracked as
last_good_offset.
Fix it by tracking only user xstate offsets.
[ bp: Use xfeature_is_supervisor() and save an indentation level. Drop
now unused xfeature_is_user(). ]
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/20200109211452.27369-2-yu-cheng.yu@intel.com
Diffstat (limited to 'kernel/bpf/stackmap.c')
0 files changed, 0 insertions, 0 deletions