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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-06 09:48:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-06 09:48:27 -0800 |
| commit | 3219e264b984ec0a13923aa66385819c2e98d582 (patch) | |
| tree | 4d344c40928cadce611504a439f33473338984a7 | |
| parent | 65c64d1845fbc6420f8836e8731ea6c3012e8e7d (diff) | |
| parent | ecb101aed86156ec7cd71e5dca668e09146e6994 (diff) | |
Merge tag 'powerpc-4.15-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fix from Michael Ellerman:
"Just one fix to correctly return SEGV_ACCERR when we take a SEGV on a
mapped region. The bug was introduced in the refactoring of the page
fault handler we did in the previous release.
Thanks to John Sperbeck"
* tag 'powerpc-4.15-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm: Fix SEGV on mapped region to return SEGV_ACCERR
| -rw-r--r-- | arch/powerpc/mm/fault.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 4797d08581ce..6e1e39035380 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -145,6 +145,11 @@ static noinline int bad_area(struct pt_regs *regs, unsigned long address) return __bad_area(regs, address, SEGV_MAPERR); } +static noinline int bad_access(struct pt_regs *regs, unsigned long address) +{ + return __bad_area(regs, address, SEGV_ACCERR); +} + static int do_sigbus(struct pt_regs *regs, unsigned long address, unsigned int fault) { @@ -490,7 +495,7 @@ retry: good_area: if (unlikely(access_error(is_write, is_exec, vma))) - return bad_area(regs, address); + return bad_access(regs, address); /* * If for any reason at all we couldn't handle the fault, |