From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, "Andy Lutomirski" <luto@kernel.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
kvm@vger.kernel.org, "Jason A. Donenfeld" <Jason@zx2c4.com>,
"Rik van Riel" <riel@surriel.com>,
"Dave Hansen" <dave.hansen@linux.intel.com>
Subject: Re: [PATCH 21/24] x86/fpu: Let __fpu__restore_sig() restore the !32bit+fxsr frame from kernel memory
Date: Fri, 22 Mar 2019 15:55:01 +0100 [thread overview]
Message-ID: <20190322145501.ldiaqlemmygnr27x@linutronix.de> (raw)
In-Reply-To: <20190321202632.16810-22-bigeasy@linutronix.de>
On 2019-03-21 21:26:29 [+0100], To linux-kernel@vger.kernel.org wrote:
> diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
> index 5a467a381245c..052a16c96218f 100644
> --- a/arch/x86/kernel/fpu/signal.c
> +++ b/arch/x86/kernel/fpu/signal.c
> @@ -297,28 +298,63 @@ static int __fpu__restore_sig(void __user *buf, void __user *buf_fx, int size)
…
> + } else {
> + ret = __copy_from_user(&state->fsave, buf_fx, state_size);
> + if (ret)
> + goto err_out;
> + ret = copy_users_to_fregs(buf_fx);
This needs to become
ret = copy_users_to_fregs(&fpu->state.fsave);
here and in the follow up patch (fixing locally)
> + }
Sebastian
next prev parent reply other threads:[~2019-03-22 14:55 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-21 20:26 [PATCH v8] x86: load FPU registers on return to userland Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 01/24] x86/fpu: Remove fpu->initialized usage in __fpu__restore_sig() Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 02/24] x86/fpu: Remove fpu__restore() Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 03/24] x86/fpu: Remove preempt_disable() in fpu__clear() Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 04/24] x86/fpu: Always init the `state' " Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 05/24] x86/fpu: Remove fpu->initialized usage in copy_fpstate_to_sigframe() Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 06/24] x86/fpu: Don't save fxregs for ia32 frames " Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 07/24] x86/fpu: Remove fpu->initialized Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 08/24] x86/fpu: Remove user_fpu_begin() Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 09/24] x86/fpu: Add (__)make_fpregs_active helpers Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 10/24] x86/fpu: Make __raw_xsave_addr() use feature number instead of mask Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 11/24] x86/fpu: Make get_xsave_field_ptr() and get_xsave_addr() " Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 12/24] x86/pkru: Provide .*_pkru_ins() functions Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 13/24] x86/fpu: Only write PKRU if it is different from current Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 14/24] x86/pkeys: Don't check if PKRU is zero before writting it Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 15/24] x86/fpu: Eager switch PKRU state Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 16/24] x86/entry: Add TIF_NEED_FPU_LOAD Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 17/24] x86/fpu: Always store the registers in copy_fpstate_to_sigframe() Sebastian Andrzej Siewior
2019-03-31 16:54 ` Thomas Gleixner
2019-03-21 20:26 ` [PATCH 18/24] x86/fpu: Prepare copy_fpstate_to_sigframe() for TIF_NEED_FPU_LOAD Sebastian Andrzej Siewior
2019-03-31 18:20 ` Thomas Gleixner
2019-04-01 8:24 ` Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 19/24] x86/fpu: Update xstate's PKRU value on write_pkru() Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 20/24] x86/fpu: Inline copy_user_to_fpregs_zeroing() Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 21/24] x86/fpu: Let __fpu__restore_sig() restore the !32bit+fxsr frame from kernel memory Sebastian Andrzej Siewior
2019-03-22 14:55 ` Sebastian Andrzej Siewior [this message]
2019-03-21 20:26 ` [PATCH 22/24] x86/fpu: Merge the two code paths in __fpu__restore_sig() Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 23/24] x86/fpu: Defer FPU state load until return to userspace Sebastian Andrzej Siewior
2019-03-21 20:26 ` [PATCH 24/24] x86/pkeys: add PKRU value to init_fpstate Sebastian Andrzej Siewior
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