Wu Fengguang 977b7e3a52 writeback: fix dereferencing NULL bdi->dev on trace_writeback_queue ... When a SD card is hot removed without umount, del_gendisk() will call bdi_unregister() without destroying/freeing it. This leaves the bdi in the bdi->dev = NULL, bdi->wb.task = NULL, bdi->bdi_list removed state. When sync(2) gets the bdi before bdi_unregister() and calls bdi_queue_work() after the unregister, trace_writeback_queue will be dereferencing the NULL bdi->dev. Fix it with a simple test for NULL. LKML-reference: http://lkml.org/lkml/2012/1/18/346 Cc: stable@kernel.org Reported-by: Rabin Vincent <rabin@rab.in> Tested-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>		2012-02-06 11:17:25 +08:00
..
9p.h	net/9p: Convert net/9p protocol dumps to tracepoints	2011-10-24 11:13:12 -05:00
asoc.h	ASoC: Add another DAPM stat for neighbour checks	2011-09-22 17:24:40 +01:00
block.h	blktrace: add FLUSH/FUA support	2011-08-11 10:36:05 +02:00
btrfs.h	Btrfs: space leak tracepoints	2012-01-16 15:29:43 -05:00
compaction.h	mm: compaction: add trace events for memory compaction activity	2011-01-13 17:32:33 -08:00
ext3.h	ext3: Add fixed tracepoints	2011-06-25 17:29:51 +02:00
ext4.h	ext4: do not reference pa_inode from group_pa	2011-12-18 15:49:54 -05:00
gfpflags.h	mm: tracing: add missing GFP flags to tracing	2011-05-11 18:50:45 -07:00
gpio.h	gpio: add trace events for setting direction and value	2011-05-20 00:40:19 -06:00
irq.h	rcu: Use softirq to address performance regression	2011-06-14 15:25:39 -07:00
jbd2.h	jbd2: remove jbd2_dev_to_name() from jbd2 tracepoints	2011-07-10 22:05:08 -04:00
jbd.h	jbd: Add fixed tracepoints	2011-06-25 17:29:51 +02:00
kmem.h	mm-tracepoint: rename page-free events	2012-01-10 16:30:41 -08:00
kvm.h	KVM: cleanup async_pf tracepoints	2011-01-12 11:28:57 +02:00
lock.h	tracing: Factorize lock events in a lock class	2010-05-09 13:45:35 +02:00
mce.h	tracing: Fix event alignment: mce:mce_record	2011-03-10 10:34:28 -05:00
module.h	include: replace linux/module.h with "struct module" wherever possible	2011-10-31 19:32:32 -04:00
napi.h	napi: Convert trace_napi_poll to TRACE_EVENT	2010-09-07 17:51:01 +02:00
net.h	net: tracepoint of net_dev_xmit sees freed skb and causes panic	2011-06-02 14:06:31 -07:00
oom.h	tracepoint: add tracepoints for debugging oom_score_adj	2012-01-10 16:30:44 -08:00
power.h	perf: Clean up power events by introducing new, more generic ones	2011-01-04 08:16:54 +01:00
rcu.h	rcu: Augment rcu_batch_end tracing for idle and callback state	2011-12-11 10:32:22 -08:00
regmap.h	regmap: Add trace event for successful cache reads	2011-11-30 20:51:09 +00:00
regulator.h	regulator: Add basic trace facilities	2011-01-12 14:33:00 +00:00
rpm.h	PM / Runtime: Introduce trace points for tracing rpm_* functions	2011-09-27 22:53:27 +02:00
sched.h	sched/tracing: Add a new tracepoint for sleeptime	2011-12-23 17:56:17 +01:00
scsi.h	[SCSI] Include protection operation in SCSI command trace	2011-03-14 18:36:02 -05:00
signal.h	tracing: Fix null pointer deref with SEND_SIG_FORCED	2010-06-08 23:51:32 +02:00
skb.h	tracing: Fix event alignment: skb:kfree_skb	2011-03-10 10:34:31 -05:00
sock.h	core: add tracepoints for queueing skb to rcvbuf	2011-06-21 16:06:10 -07:00
syscalls.h	tracing: Allow raw syscall trace events for non privileged users	2010-11-18 14:37:43 +01:00
task.h	tracepoint: add tracepoints for debugging oom_score_adj	2012-01-10 16:30:44 -08:00
timer.h	tracing: Fix timer tracing	2010-08-19 13:00:41 +02:00
udp.h	udp: add tracepoints for queueing skb to rcvbuf	2011-06-21 16:06:10 -07:00
vmscan.h	vmscan/trace: Add 'file' info to trace_mm_vmscan_lru_isolate()	2012-01-12 20:13:08 -08:00
workqueue.h	workqueue: add queue_work and activate_work trace points	2010-10-05 10:49:55 +02:00
writeback.h	writeback: fix dereferencing NULL bdi->dev on trace_writeback_queue	2012-02-06 11:17:25 +08:00
xen.h	xen/tracing: fix compile errors when tracing is disabled.	2011-07-25 15:51:02 -07:00