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SubjectRe: [2.6 patch] net/sctp/socket.c: add missing sctp_spin_unlock_irqrestore
Al Viro wrote:
> On Sun, Nov 26, 2006 at 06:00:53PM +0800, Eugene Teo wrote:
>> This patch adds a missing sctp_spin_unlock_irqrestore when returning
>> from "if(space_left<addrlen)" condition.
>> if (copy_to_user(*to, &temp, addrlen)) {
>> - sctp_spin_unlock_irqrestore(&sctp_local_addr_lock,
>> - flags);
>> - return -EFAULT;
>> + err = -EFAULT;
>> + goto unlock;
>
>> + sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
>> + return err;
>> }
>
> You do realize that it's obviously still badly broken, don't you?
> copy_to_user() under a spinlock is a recipe for deadlock, especially
> if you've got interrupts disabled...

Realized. Back to drawing board.

Eugene
--
1024D/58DF8823 print 47B9 90F6 AE4A 9C51 37E0 D6E1 EA84 C6A2 58DF 8823
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }
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