Hi ! This patch fixes a concurrency issue in shmget02. Same issue as in shmat02 : second key can conflict with the key from another process.
R. -- Renaud Lottiaux Kerlabs Bâtiment Germanium 80, avenue des buttes de Coësmes 35700 Rennes - France Phone : (+33|0)6 80 89 19 34 Fax : (+33|0)2 99 84 71 71 Email : [EMAIL PROTECTED] Web : http://www.kerlabs.com/
Index: cvs/testcases/kernel/syscalls/ipc/shmget/shmget02.c
===================================================================
--- cvs.orig/testcases/kernel/syscalls/ipc/shmget/shmget02.c 2008-03-06 18:20:26.000000000 +0100
+++ cvs/testcases/kernel/syscalls/ipc/shmget/shmget02.c 2008-03-06 18:21:27.000000000 +0100
@@ -46,6 +46,10 @@
* HISTORY
* 03/2001 - Written by Wayne Boyer
*
+ * 06/03/2008 Renaud Lottiaux ([EMAIL PROTECTED])
+ * - Fix concurrency issue. The second key used for this test could
+ * conflict with the key from another task.
+ *
* RESTRICTIONS
* none
*/
@@ -164,7 +168,13 @@
/* get an IPC resource key */
shmkey = getipckey();
- shmkey2 = shmkey + 1;
+ /* Get an new IPC resource key. Since there is a small chance the
+ * getipckey() function returns the same key as the previous one,
+ * loop until we have a different key.
+ */
+ do {
+ shmkey2 = getipckey();
+ } while (shmkey2 == shmkey);
if ((shm_id_1 = shmget(shmkey, SHM_SIZE, IPC_CREAT | IPC_EXCL |
SHM_RW)) == -1) {
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