[patch] i386: extra checks in show_registers()

[Chuck Ebbert <76306.1226@compuserve.com>]

Sometimes thread_info and task_struct get out-of-sync with each
other.  Printing task.thread_info in show_registers() can help
spot this.  And when task_struct is corrupt then task.comm can
contain garbage, so only print as many characters as it can hold.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>

--- 2.6.17-rc6-32-post.orig/arch/i386/kernel/traps.c
+++ 2.6.17-rc6-32-post/arch/i386/kernel/traps.c
@@ -268,8 +268,9 @@ void show_registers(struct pt_regs *regs
 		regs->esi, regs->edi, regs->ebp, esp);
 	printk(KERN_EMERG "ds: %04x   es: %04x   ss: %04x\n",
 		regs->xds & 0xffff, regs->xes & 0xffff, ss);
-	printk(KERN_EMERG "Process %s (pid: %d, threadinfo=%p task=%p)",
-		current->comm, current->pid, current_thread_info(), current);
+	printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+		TASK_COMM_LEN, current->comm, current->pid,
+		current_thread_info(), current, current->thread_info);
 	/*
 	 * When in-kernel, we also print out the stack and code at the
 	 * time of the fault..
-- 
Chuck
-
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