Messages in this thread | | | Date | Wed, 16 May 2007 17:06:46 +0530 | From | "Satyam Sharma" <> | Subject | Re: 2.6.21-rc7: BUG: sleeping function called from invalid context at net/core/sock.c:1523 |
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Hi Jiri,
On 5/16/07, Jiri Kosina <jikos@jikos.cz> wrote: > On Fri, 11 May 2007, Satyam Sharma wrote: > > (later) > > I Googled a bit to see if this problem was faced elsewhere in the kernel > > too. Saw the following commit by Ingo Molnar > > (9883a13c72dbf8c518814b6091019643cdb34429): > > - lock_sock(sock->sk); > > + local_bh_disable(); > > + bh_lock_sock_nested(sock->sk); > > rc = selinux_netlbl_socket_setsid(sock, sksec->sid); > > - release_sock(sock->sk); > > + bh_unlock_sock(sock->sk); > > + local_bh_enable(); > > Is it _really_ *this* simple? > [...] > actually this *seems* to be proper solution also for our case, thanks for > pointing this out. I will think about it once again, do some more tests > with this locking scheme, and will let you know.
Yes, I can almost confirm that this (open-coding of spin_lock_bh, effectively) is the proper solution (Rusty's unreliable guide to kernel-locking needs to be next to every developer's keyboard :-) I also came across this idiom in other places in the networking code so it seems to be pretty much the standard way. I wish I owned bluetooth hardware, could've tested this for you myself.
Thanks, Satyam - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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