A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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Revert "kernel/kcmp.c: Use new infrastructure to fix deadlocks in execve"

Browse source 
This reverts commit 0cd9783686 which is
commit 454e3126cb842388e22df6b3ac3da44062c00765 upstream.

It breaks the API and we don't need it right now in the 5.4 tree.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I8e804a962024dffd39107b9e7542d07e7cdc55df
This commit is contained in:
Greg Kroah-Hartman 2020-10-01 18:32:40 +02:00
commit edfa37e00c
1 changed files with 4 additions and 4 deletions
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8
kernel/kcmp.c
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@ -173,8 +173,8 @@ SYSCALL_DEFINE5(kcmp, pid_t, pid1, pid_t, pid2, int, type,
/*
* One should have enough rights to inspect task details.
*/
ret = kcmp_lock(&task1->signal->exec_update_mutex,
&task2->signal->exec_update_mutex);
ret = kcmp_lock(&task1->signal->cred_guard_mutex,
&task2->signal->cred_guard_mutex);
if (ret)
goto err;
if (!ptrace_may_access(task1, PTRACE_MODE_READ_REALCREDS) ||
@ -229,8 +229,8 @@ SYSCALL_DEFINE5(kcmp, pid_t, pid1, pid_t, pid2, int, type,
}
err_unlock:
kcmp_unlock(&task1->signal->exec_update_mutex,
&task2->signal->exec_update_mutex);
kcmp_unlock(&task1->signal->cred_guard_mutex,
&task2->signal->cred_guard_mutex);
err:
put_task_struct(task1);
put_task_struct(task2);