xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390: update sampling tag after task pid change

Browse Source 
In a multi-threaded program any thread can call execve(). If this
is not done by the thread group leader, the de_thread() function
replaces the pid of the task that calls execve() with the pid of
thread group leader. If the task reaches user space again without
going over __switch_to() the sampling tag is still set to the old
pid.

Define the arch_setup_new_exec function to verify the task pid
and udpate the tag with LPP if it has changed.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2018-04-20 10:21:21 +02:00
parent 5f3ba878e7
commit 2317b07d05
2 changed files with 13 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/s390/include/asm/thread_info.h
View File

@@ -45,6 +45,9 @@ struct thread_info {
void arch_release_task_struct(struct task_struct *tsk);
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
void arch_setup_new_exec(void);
#define arch_setup_new_exec arch_setup_new_exec
#endif
/*