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[PATCH] rcu: Avoid kthread_stop on invalid pointer if rcutorture reader startup fails

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rcu_torture_init kmallocs the array of reader threads, then creates each
one with kthread_run, cleaning up with rcu_torture_cleanup if this fails.
rcu_torture_cleanup calls kthread_stop on any non-NULL pointer in the
array; however, any readers after the one that failed to start up will have
invalid pointers, not null pointers.  Avoid this by using kzalloc instead.

Signed-off-by: Josh Triplett <josh@freedesktop.org>
Acked-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Josh Triplett 2006-10-04 02:17:11 -07:00 committed by Linus Torvalds
parent 3c29e03d91
commit 2860aaba4d
1 changed files with 1 additions and 1 deletions
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2
kernel/rcutorture.c
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@ -780,7 +780,7 @@ rcu_torture_init(void)
writer_task = NULL; writer_task = NULL;
goto unwind; goto unwind;
} }
reader_tasks = kmalloc(nrealreaders * sizeof(reader_tasks[0]), reader_tasks = kzalloc(nrealreaders * sizeof(reader_tasks[0]),
GFP_KERNEL); GFP_KERNEL);
if (reader_tasks == NULL) { if (reader_tasks == NULL) {
VERBOSE_PRINTK_ERRSTRING("out of memory"); VERBOSE_PRINTK_ERRSTRING("out of memory");