diff options
| -rw-r--r-- | arch/x86_64/kernel/traps.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c index 2700b1375c1..0ebb281aa17 100644 --- a/arch/x86_64/kernel/traps.c +++ b/arch/x86_64/kernel/traps.c @@ -385,6 +385,7 @@ void out_of_line_bug(void) static DEFINE_SPINLOCK(die_lock); static int die_owner = -1; +static unsigned int die_nest_count; unsigned __kprobes long oops_begin(void) { @@ -399,6 +400,7 @@ unsigned __kprobes long oops_begin(void) else spin_lock(&die_lock); } + die_nest_count++; die_owner = cpu; console_verbose(); bust_spinlocks(1); @@ -409,7 +411,13 @@ void __kprobes oops_end(unsigned long flags) { die_owner = -1; bust_spinlocks(0); - spin_unlock_irqrestore(&die_lock, flags); + die_nest_count--; + if (die_nest_count) + /* We still own the lock */ + local_irq_restore(flags); + else + /* Nest count reaches zero, release the lock. */ + spin_unlock_irqrestore(&die_lock, flags); if (panic_on_oops) panic("Oops"); } |