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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-20 19:44:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-20 19:44:19 -0800 |
| commit | 317d4f459393e27b3efedf571bd9e78a23fcd2ed (patch) | |
| tree | ed9c133af037d51773aa16a11df8fa04cfa12148 /arch/x86/kernel/msr.c | |
| parent | ae821d2107e378bb086a02afcce82d0f43c29a6f (diff) | |
| parent | 02a16aa13574c8526beadfc9ae8cc9b66315fa2d (diff) | |
Merge tag 'x86_misc_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 misc updates from Borislav Petkov:
- Complete the MSR write filtering by applying it to the MSR ioctl
interface too.
- Other misc small fixups.
* tag 'x86_misc_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too
selftests/fpu: Fix debugfs_simple_attr.cocci warning
selftests/x86: Use __builtin_ia32_read/writeeflags
x86/reboot: Add Zotac ZBOX CI327 nano PCI reboot quirk
Diffstat (limited to 'arch/x86/kernel/msr.c')
| -rw-r--r-- | arch/x86/kernel/msr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c index 8a67d1fa8dc5..ed8ac6bcbafb 100644 --- a/arch/x86/kernel/msr.c +++ b/arch/x86/kernel/msr.c @@ -182,6 +182,13 @@ static long msr_ioctl(struct file *file, unsigned int ioc, unsigned long arg) err = security_locked_down(LOCKDOWN_MSR); if (err) break; + + err = filter_write(regs[1]); + if (err) + return err; + + add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_STILL_OK); + err = wrmsr_safe_regs_on_cpu(cpu, regs); if (err) break; |