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| author | Thomas Gleixner <tglx@linutronix.de> | 2021-09-08 15:29:41 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-09-14 21:10:04 +0200 |
| commit | a2a8fd9a3efd8d22ee14a441e9e78cf5c998e69a (patch) | |
| tree | 639b30561529a0d7d2e66bfc61cd1bed8c6a99c8 /arch/x86/kernel/fpu | |
| parent | be0040144152ed834c369a7830487e5ee4f27080 (diff) | |
| download | linux-stable-a2a8fd9a3efd8d22ee14a441e9e78cf5c998e69a.tar.gz linux-stable-a2a8fd9a3efd8d22ee14a441e9e78cf5c998e69a.tar.bz2 linux-stable-a2a8fd9a3efd8d22ee14a441e9e78cf5c998e69a.zip | |
x86/fpu/signal: Change return code of restore_fpregs_from_user() to boolean
__fpu_sig_restore() only needs information about success or fail and no
real error code.
This cleans up the confusing conversion of the trap number, which is
returned by the *RSTOR() exception fixups, to an error code.
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210908132526.084109938@linutronix.de
Diffstat (limited to 'arch/x86/kernel/fpu')
| -rw-r--r-- | arch/x86/kernel/fpu/signal.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c index 2bd4d51f985e..68f03da2012e 100644 --- a/arch/x86/kernel/fpu/signal.c +++ b/arch/x86/kernel/fpu/signal.c @@ -254,8 +254,8 @@ static int __restore_fpregs_from_user(void __user *buf, u64 xrestore, * Attempt to restore the FPU registers directly from user memory. * Pagefaults are handled and any errors returned are fatal. */ -static int restore_fpregs_from_user(void __user *buf, u64 xrestore, - bool fx_only, unsigned int size) +static bool restore_fpregs_from_user(void __user *buf, u64 xrestore, + bool fx_only, unsigned int size) { struct fpu *fpu = ¤t->thread.fpu; int ret; @@ -284,12 +284,11 @@ retry: /* Try to handle #PF, but anything else is fatal. */ if (ret != X86_TRAP_PF) - return -EINVAL; + return false; - ret = fault_in_pages_readable(buf, size); - if (!ret) + if (!fault_in_pages_readable(buf, size)) goto retry; - return ret; + return false; } /* @@ -306,7 +305,7 @@ retry: fpregs_mark_activate(); fpregs_unlock(); - return 0; + return true; } static bool __fpu_restore_sig(void __user *buf, void __user *buf_fx, @@ -341,8 +340,8 @@ static bool __fpu_restore_sig(void __user *buf, void __user *buf_fx, * faults. If it does, fall back to the slow path below, going * through the kernel buffer with the enabled pagefault handler. */ - return !restore_fpregs_from_user(buf_fx, user_xfeatures, fx_only, - state_size); + return restore_fpregs_from_user(buf_fx, user_xfeatures, fx_only, + state_size); } /* |