Ralph Metzler wrote: > Andreas Oberritter writes: > > > > Thank you, Ralph. Can anyone please test the attached patch for the > > dvb-kernel tree to see if it fixes the problem? > > The possible problem I referred to and which your patch > fixes only could lead to segfaults during interrupt or bottom half > caused by possibly deleted but not yet unlinked list entries or other > structures. > The original problem was in dvbdmx_release_ts_feed() when called > from user space!? The bug causing this probably is still there.
I see two problems: - spinlocks only disable irqs on the local CPU, so every access to the feed_list must be protected against accesses from another CPU to be SMP save; but dvb_dmx_swfilter_packet() might be problematic because it calls the feed callback which iterating the feed list - spin_unlock_irq() enables irqs unconditionally; check if that's OK or use spin_lock_irq_save()/spin_inlock_orq_restore() Thanks, Johannes -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
