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| author | David S. Miller <davem@davemloft.net> | 2017-09-23 10:16:53 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-09-23 10:16:53 -0700 |
| commit | 1f8d31d189cc6ce1e4b972959fda41e790bb92b8 (patch) | |
| tree | fd3cca12a29319f073773ac55f7d41cc58e2c73f /fs/proc/array.c | |
| parent | 3fb5ec06578e4c85d3486b6a73cbeb07960a51ce (diff) | |
| parent | cd4175b11685b11c40e31a03e05084cc212b0649 (diff) | |
| download | lwn-1f8d31d189cc6ce1e4b972959fda41e790bb92b8.tar.gz lwn-1f8d31d189cc6ce1e4b972959fda41e790bb92b8.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'fs/proc/array.c')
| -rw-r--r-- | fs/proc/array.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index 88c355574aa0..525157ca25cb 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -62,6 +62,7 @@ #include <linux/mman.h> #include <linux/sched/mm.h> #include <linux/sched/numa_balancing.h> +#include <linux/sched/task_stack.h> #include <linux/sched/task.h> #include <linux/sched/cputime.h> #include <linux/proc_fs.h> @@ -421,7 +422,15 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, * esp and eip are intentionally zeroed out. There is no * non-racy way to read them without freezing the task. * Programs that need reliable values can use ptrace(2). + * + * The only exception is if the task is core dumping because + * a program is not able to use ptrace(2) in that case. It is + * safe because the task has stopped executing permanently. */ + if (permitted && (task->flags & PF_DUMPCORE)) { + eip = KSTK_EIP(task); + esp = KSTK_ESP(task); + } } get_task_comm(tcomm, task); |