Carsten Emde fe63b94a43 tracing: prevent NULL pointer dereference in ftrace_raw_event_block_bio_bounce ... Booting 2.6.31 and executing echo 1 >/sys/kernel/debug/tracing/events/enable leads to BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<c032a583>] ftrace_raw_event_block_bio_bounce+0x4b/0xb9 Apparently, bio = bio_map_user(q, NULL, uaddr, len, reading, gfp_mask); is called in block/blk-map.c:58 where bio->bi_bdev in set to NULL and still is NULL when an attempt is made to evaluate bio->bi_bdev->bd_dev in include/trace/events/block.h:189. The tracepoint should ensure bio->bi_bdev is not dereferenced, if NULL. Signed-off-by: Carsten Emde <C.Emde@osadl.org> LKML-Reference: <4AAAC9B1.9060505@osadl.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2009-09-12 21:31:19 -04:00
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events	tracing: prevent NULL pointer dereference in ftrace_raw_event_block_bio_bounce	2009-09-12 21:31:19 -04:00
boot.h	tracing/fastboot: include missing headers	2008-12-12 09:26:13 +01:00
define_trace.h	tracing: Undef TRACE_EVENT_FN between trace events headers inclusion	2009-08-27 18:32:54 +02:00
ftrace.h	tracing: pass around ring buffer instead of tracer	2009-09-04 18:59:39 -04:00
power.h	tracing: replace TP<var> with TP_<var>	2009-03-10 00:35:04 -04:00
syscall.h	tracing: Create generic syscall TRACE_EVENTs	2009-08-26 00:41:48 +02:00