diff options
Diffstat (limited to 'arch/blackfin/kernel/traps.c')
| -rw-r--r-- | arch/blackfin/kernel/traps.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index e8e8f735c23..7557d0dce21 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -655,21 +655,30 @@ void dump_bfin_process(struct pt_regs *fp) else if (context & 0x8000) printk(KERN_NOTICE "Kernel process context\n"); - if (current->pid && current->mm) { + /* Because we are crashing, and pointers could be bad, we check things + * pretty closely before we use them + */ + if (!((unsigned long)current & 0x3) && current->pid) { printk(KERN_NOTICE "CURRENT PROCESS:\n"); - printk(KERN_NOTICE "COMM=%s PID=%d\n", - current->comm, current->pid); - - printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" - KERN_NOTICE "BSS = 0x%p-0x%p USER-STACK = 0x%p\n" - KERN_NOTICE "\n", - (void *)current->mm->start_code, - (void *)current->mm->end_code, - (void *)current->mm->start_data, - (void *)current->mm->end_data, - (void *)current->mm->end_data, - (void *)current->mm->brk, - (void *)current->mm->start_stack); + if (current->comm >= (char *)FIXED_CODE_START) + printk(KERN_NOTICE "COMM=%s PID=%d\n", + current->comm, current->pid); + else + printk(KERN_NOTICE "COMM= invalid\n"); + + if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) + printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" + KERN_NOTICE " BSS = 0x%p-0x%p USER-STACK = 0x%p\n" + KERN_NOTICE "\n", + (void *)current->mm->start_code, + (void *)current->mm->end_code, + (void *)current->mm->start_data, + (void *)current->mm->end_data, + (void *)current->mm->end_data, + (void *)current->mm->brk, + (void *)current->mm->start_stack); + else + printk(KERN_NOTICE "invalid mm\n"); } else printk(KERN_NOTICE "\n" KERN_NOTICE "No Valid process in current context\n"); |