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| author | Thomas Gleixner <[email protected]> | 2021-06-08 14:36:20 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2021-06-09 08:39:04 +0000 |
| commit | 12f7764ac61200e32c916f038bdc08f884b0b604 (patch) | |
| tree | bc45114cf3445c7a9e7c5f795097c8c89bbdeea4 /tools/bpf/bpftool/prog.c | |
| parent | x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer (diff) | |
| download | kernel-12f7764ac61200e32c916f038bdc08f884b0b604.tar.gz kernel-12f7764ac61200e32c916f038bdc08f884b0b604.zip | |
x86/process: Check PF_KTHREAD and not current->mm for kernel threads
switch_fpu_finish() checks current->mm as indicator for kernel threads.
That's wrong because kernel threads can temporarily use a mm of a user
process via kthread_use_mm().
Check the task flags for PF_KTHREAD instead.
Fixes: 0cecca9d03c9 ("x86/fpu: Eager switch PKRU state")
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Dave Hansen <[email protected]>
Acked-by: Rik van Riel <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'tools/bpf/bpftool/prog.c')
0 files changed, 0 insertions, 0 deletions