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mcexec_open_exec: make fput and add to mckernel_exec_files atomic

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Change-Id: Iff4ac8bb9b4ebfcb9c77e84ed3f0a40e6b9efb6a
This commit is contained in:
Masamichi Takagi
2021-03-04 15:11:02 +09:00
parent 73d028de77
commit c80ea0ed23
1 changed files with 7 additions and 2 deletions
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9
executer/kernel/mcctrl/control.c
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@ -2001,26 +2001,31 @@ int mcexec_open_exec(ihk_os_t os, char * __user filename)
goto out_free;
}
/* fget and list_add should be atomic */
down(&mckernel_exec_file_lock);
file = open_exec(kfilename);
retval = PTR_ERR(file);
if (IS_ERR(file)) {
up(&mckernel_exec_file_lock);
goto out_free;
}
fullpath = d_path(&file->f_path, pathbuf, PATH_MAX);
if (IS_ERR(fullpath)) {
up(&mckernel_exec_file_lock);
retval = PTR_ERR(fullpath);
goto out_free;
goto out_put_file;
}
mcef = kmalloc(sizeof(*mcef), GFP_KERNEL);
if (!mcef) {
up(&mckernel_exec_file_lock);
retval = -ENOMEM;
goto out_put_file;
}
memset(mcef, 0, sizeof(struct mckernel_exec_file)); /* debug */
down(&mckernel_exec_file_lock);
/* Find previous file (if exists) and drop it */
list_for_each_entry(mcef_iter, &mckernel_exec_files, list) {
if (mcef_iter->os == os && mcef_iter->pid == task_tgid_vnr(current)) {