On 2017/6/5 21:09, Michal Hocko wrote:
> On Mon 05-06-17 20:53:27, zhongjiang wrote:
>> diff --git a/kernel/signal.c b/kernel/signal.c
>> index ca92bcf..63148f7 100644
>> --- a/kernel/signal.c
>> +++ b/kernel/signal.c
>> @@ -1395,6 +1395,12 @@ static int kill_something_info(int sig, struct siginfo *info, pid_t pid)
>>
>> read_lock(&tasklist_lock);
>> if (pid != -1) {
>> + /*
>> + * -INT_MIN is undefined, it need to exclude following case to
>> + * avoid the UBSAN detection.
>> + */
>> + if (pid == INT_MIN)
>> + return -ESRCH;
> this will obviously keep the tasklist_lock held...
oh, it is my fault. Thank you for clarify.
Thanks
zhongjiang
>> ret = __kill_pgrp_info(sig, info,
>> pid ? find_vpid(-pid) : task_pgrp(current));
>> } else {
>> --
>> 1.7.12.4
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