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uti: Enforce mcexec is destroyed and then McKernel process is destroyed

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Masamichi Takagi
2018-01-24 08:57:20 +09:00
parent 77f5cac2bf
commit b7cdbd6c42
1 changed files with 5 additions and 1 deletions
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6
executer/user/mcexec.c
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@@ -3572,7 +3572,11 @@ int main_loop(struct thread_data_s *my_thread)
sig = 0; sig = 0;
term = 0; term = 0;
do_syscall_return(fd, cpu, 0, 0, 0, 0, 0); /* Enforce the order in which mcexec is destroyed and then
McKernel process is destroyed to prevent
migrated-to-Linux thread from accessing stale memory values.
It is done by not calling do_syscall_return(fd, cpu, 0, 0, 0, 0, 0);
here and making McKernel side wait until release_handler() is called. */
/* Drop executable file */ /* Drop executable file */
if ((ret = ioctl(fd, MCEXEC_UP_CLOSE_EXEC)) != 0) { if ((ret = ioctl(fd, MCEXEC_UP_CLOSE_EXEC)) != 0) {