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| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2013-12-10 11:35:47 +0100 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2013-12-30 21:01:09 +0100 |
| commit | 4e25c0e92f8eaf69bc51d1d523bcb7268e7dd162 (patch) | |
| tree | 55125e7e00544bfca2beafebcf31795be8279caf | |
| parent | 9da4a8d9197e42d532f2e2af072d8219105139b2 (diff) | |
| download | linux-4e25c0e92f8eaf69bc51d1d523bcb7268e7dd162.tar.bz2 | |
m68k/mm: Check for mm != NULL in do_page_fault() debug code
When DEBUG is enabled, do_page_fault() may dereference a NULL pointer,
causing recursive bus errors.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| -rw-r--r-- | arch/m68k/mm/fault.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c index eb1d61f68725..c7725f1de05d 100644 --- a/arch/m68k/mm/fault.c +++ b/arch/m68k/mm/fault.c @@ -77,8 +77,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, #ifdef DEBUG printk ("do page fault:\nregs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld, %p\n", - regs->sr, regs->pc, address, error_code, - current->mm->pgd); + regs->sr, regs->pc, address, error_code, mm ? mm->pgd : NULL); #endif /* |