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| author | Helge Deller <deller@gmx.de> | 2021-10-31 23:58:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:15:52 +0300 |
| commit | 9a5125dcb0452e5ff018fc7eac46223c69ca435f (patch) | |
| tree | 99d94f176af3a8b36a3e7308c997f75b9bc77929 /arch/parisc | |
| parent | 7887fea0c0d48ec7f4137f43571468d58f12fa36 (diff) | |
| download | linux-9a5125dcb0452e5ff018fc7eac46223c69ca435f.tar.xz | |
parisc: Fix set_fixmap() on PA1.x CPUs
commit 6e866a462867b60841202e900f10936a0478608c upstream.
Fix a kernel crash which happens on PA1.x CPUs while initializing the
FTRACE/KPROBE breakpoints. The PTE table entries for the fixmap area
were not created correctly.
Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: ccfbc68d41c2 ("parisc: add set_fixmap()/clear_fixmap()")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/mm/fixmap.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/parisc/mm/fixmap.c b/arch/parisc/mm/fixmap.c index 24426a7e1a5e..cc15d737fda6 100644 --- a/arch/parisc/mm/fixmap.c +++ b/arch/parisc/mm/fixmap.c @@ -20,12 +20,9 @@ void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys) pte_t *pte; if (pmd_none(*pmd)) - pmd = pmd_alloc(NULL, pud, vaddr); - - pte = pte_offset_kernel(pmd, vaddr); - if (pte_none(*pte)) pte = pte_alloc_kernel(pmd, vaddr); + pte = pte_offset_kernel(pmd, vaddr); set_pte_at(&init_mm, vaddr, pte, __mk_pte(phys, PAGE_KERNEL_RWX)); flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); } |