On 2017/6/5 21:31, Oleg Nesterov wrote:
> On 06/05, zhongjiang wrote:
>> --- 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(_lock);
>> if (pid != -1) {
>> +/*
>>
On 2017/6/5 21:31, Oleg Nesterov wrote:
> On 06/05, zhongjiang wrote:
>> --- 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(_lock);
>> if (pid != -1) {
>> +/*
>>
On 06/05, zhongjiang wrote:
>
> --- 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(_lock);
> if (pid != -1) {
> + /*
> + * -INT_MIN is undefined, it
On 06/05, zhongjiang wrote:
>
> --- 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(_lock);
> if (pid != -1) {
> + /*
> + * -INT_MIN is undefined, it
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
>>
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
>>
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)
>
>
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)
>
>
when I run the kill(72057458746458112, 0) in the userspace, I hit
the following issue.
[ 304.606353] UBSAN: Undefined behaviour in kernel/signal.c:1462:11
[ 304.612622] negation of -2147483648 cannot be represented in type 'int':
[ 304.619516] CPU: 226 PID: 9849 Comm: test Tainted: GB
when I run the kill(72057458746458112, 0) in the userspace, I hit
the following issue.
[ 304.606353] UBSAN: Undefined behaviour in kernel/signal.c:1462:11
[ 304.612622] negation of -2147483648 cannot be represented in type 'int':
[ 304.619516] CPU: 226 PID: 9849 Comm: test Tainted: GB
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