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Laurent Pinchart f41ced8f10 Check fops_get() return value ... Several subsystem open handlers dereference the fops_get() return value without checking it for nullness. This opens a race condition between the open handler and module unloading. A module can be marked as being unloaded (MODULE_STATE_GOING) before its exit function is called and gets the chance to unregister the driver. During that window open handlers can still be called, and fops_get() will fail in try_module_get() and return a NULL pointer. This change checks the fops_get() return value and returns -ENODEV if NULL. Reported-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Acked-by: Takashi Iwai <tiwai@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Dave Airlie <airlied@linux.ie> Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		16 years ago
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Makefile	…
demux.h	…
dmxdev.c	…
dmxdev.h	…
dvb_ca_en50221.c	…
dvb_ca_en50221.h	…
dvb_demux.c	…
dvb_demux.h	…
dvb_filter.c	…
dvb_filter.h	…
dvb_frontend.c	V4L/DVB (9916): dvb-core: don't add an event when in ONE SHOT mode for algo type HW	16 years ago
dvb_frontend.h	V4L/DVB (9344): DVB-Core update	16 years ago
dvb_math.c	…
dvb_math.h	…
dvb_net.c	dvb: Kill directly reference of netdev->priv	16 years ago
dvb_net.h	…
dvb_ringbuffer.c	…
dvb_ringbuffer.h	…
dvbdev.c	Check fops_get() return value	16 years ago
dvbdev.h	V4L/DVB (9361): Dynamic DVB minor allocation	16 years ago