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mcctrl procfs: check entry was returned before using it

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Change-Id: If66e95d217d1045e2e65bc5978bba020e3fa7c0d
Refs: #1116
This commit is contained in:
Dominique Martinet
2018-08-24 11:53:12 +09:00
committed by Masamichi Takagi
parent 9b77630c8b
commit 09f663c246
1 changed files with 5 additions and 0 deletions
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5
executer/kernel/mcctrl/procfs.c
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@@ -294,6 +294,8 @@ get_base_entry(int osnum)
if(!e){ if(!e){
e = add_procfs_entry(NULL, name, S_IFDIR | 0555, e = add_procfs_entry(NULL, name, S_IFDIR | 0555,
uid, gid, NULL); uid, gid, NULL);
if (!e)
return NULL;
e->osnum = osnum; e->osnum = osnum;
} }
return e; return e;
@@ -429,6 +431,8 @@ proc_exe_link(int osnum, int pid, const char *path)
e = add_procfs_entry(parent, "exe", S_IFLNK | 0777, uid, gid, e = add_procfs_entry(parent, "exe", S_IFLNK | 0777, uid, gid,
path); path);
if (!e)
goto out;
e->data = kmalloc(strlen(path) + 1, GFP_KERNEL); e->data = kmalloc(strlen(path) + 1, GFP_KERNEL);
strcpy(e->data, path); strcpy(e->data, path);
task = find_procfs_entry(parent, "task"); task = find_procfs_entry(parent, "task");
@@ -437,6 +441,7 @@ proc_exe_link(int osnum, int pid, const char *path)
uid, gid, path); uid, gid, path);
} }
} }
out:
up(&procfs_file_list_lock); up(&procfs_file_list_lock);
} }