From 428622986858aebddc32d022af65e88b9d2ea8bb Mon Sep 17 00:00:00 2001 From: Kirill Korotaev Date: Fri, 31 Mar 2006 17:58:46 +0400 Subject: [PATCH] [PATCH] wrong error path in dup_fd() leading to oopses in RCU Wrong error path in dup_fd() - it should return NULL on error, not an address of already freed memory :/ Triggered by OpenVZ stress test suite. What is interesting is that it was causing different oopses in RCU like below: Call Trace: [] rcu_do_batch+0x2c/0x80 [] rcu_process_callbacks+0x3d/0x70 [] tasklet_action+0x73/0xe0 [] __do_softirq+0x10a/0x130 [] do_softirq+0x4f/0x60 ======================= [] smp_apic_timer_interrupt+0x77/0x110 [] apic_timer_interrupt+0x1c/0x24 Code: Bad EIP value. <0>Kernel panic - not syncing: Fatal exception in interrupt Signed-Off-By: Pavel Emelianov Signed-Off-By: Dmitry Mishin Signed-Off-By: Kirill Korotaev Signed-Off-By: Linus Torvalds --- kernel/fork.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/fork.c b/kernel/fork.c index 03975d0467..3384eb89cb 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -725,7 +725,7 @@ out_release: free_fdset (new_fdt->open_fds, new_fdt->max_fdset); free_fd_array(new_fdt->fd, new_fdt->max_fds); kmem_cache_free(files_cachep, newf); - goto out; + return NULL; } static int copy_files(unsigned long clone_flags, struct task_struct * tsk) -- 2.39.5