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signal/powerpc: Call _exception_pkey directly from bad_key_fault_exception

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This removes the need for other code paths to deal with pkey exceptions.

Reviewed-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2018-09-18 09:14:49 +02:00
parent 9f2ee69389
commit 8eb2ba25e3
1 changed files with 11 additions and 1 deletions
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12
arch/powerpc/mm/fault.c
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@ -145,7 +145,17 @@ static noinline int bad_area(struct pt_regs *regs, unsigned long address)
static int bad_key_fault_exception(struct pt_regs *regs, unsigned long address,
int pkey)
{
return __bad_area_nosemaphore(regs, address, SEGV_PKUERR, pkey);
/*
* If we are in kernel mode, bail out with a SEGV, this will
* be caught by the assembly which will restore the non-volatile
* registers before calling bad_page_fault()
*/
if (!user_mode(regs))
return SIGSEGV;
_exception_pkey(SIGSEGV, regs, SEGV_PKUERR, address, pkey);
return 0;
}
static noinline int bad_access(struct pt_regs *regs, unsigned long address)