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[AVR32] ratelimit segfault reporting rate

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Limit the rate of the kernel logging for the segfaults of user
applications, to avoid potential message floods or denial-of-service
attacks.

Signed-off-by: Andrea Righi <a.righi@cineca.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Andrea Righi 2007-05-23 14:14:52 -07:00 committed by Haavard Skinnemoen
parent eedab661a5
commit 126187f1e0
1 changed files with 1 additions and 1 deletions
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2
arch/avr32/mm/fault.c
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@ -158,7 +158,7 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs)
up_read(&mm->mmap_sem);
if (user_mode(regs)) {
if (exception_trace)
if (exception_trace && printk_ratelimit())
printk("%s%s[%d]: segfault at %08lx pc %08lx "
"sp %08lx ecr %lu\n",
is_init(tsk) ? KERN_EMERG : KERN_INFO,