Robert Richter c9b5dd12ec oprofile: Fix uninitialized memory access when writing to writing to oprofilefs ... commit 913050b91e upstream. If oprofilefs_ulong_from_user() is called with count equals zero, *val remains unchanged. Depending on the implementation it might be uninitialized. Change oprofilefs_ulong_from_user()'s interface to return count on success. Thus, we are able to return early if count equals zero which avoids using *val uninitialized. Fixing all users of oprofilefs_ulong_ from_user(). This follows write syscall implementation when count is zero: "If count is zero ... [and if] no errors are detected, 0 will be returned without causing any other effect." (man 2 write) Reported-By: Mike Waychison <mikew@google.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Link: http://lkml.kernel.org/r/20111219153830.GH16765@erda.amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2012-01-06 14:17:04 -08:00
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buffer_sync.c	oprofile: Fix locking dependency in sync_start()	2011-05-31 16:33:34 +02:00
buffer_sync.h	cpumask: modifiy oprofile initialization	2009-01-22 14:37:06 +01:00
cpu_buffer.c	oprofile: Introduce new oprofile sample add function (oprofile_add_ext_hw_sample)	2011-02-15 11:07:07 +01:00
cpu_buffer.h	oprofile: Remove deprecated use of flush_scheduled_work()	2010-10-29 11:54:18 +02:00
event_buffer.c	oprofile: make event buffer nonseekable	2010-07-26 10:58:24 +02:00
event_buffer.h	oprofile: Use linux/mutex.h	2011-05-24 12:45:59 +02:00
oprof.c	oprofile: Fix crash when unloading module (hr timer mode)	2011-12-09 08:55:55 -08:00
oprof.h	oprofile, s390: Rework hwsampler implementation	2011-02-15 11:10:20 +01:00
oprofile_files.c	oprofile: Fix uninitialized memory access when writing to writing to oprofilefs	2012-01-06 14:17:04 -08:00
oprofile_perf.c	perf: Remove the nmi parameter from the oprofile_perf backend	2011-07-21 20:41:58 +02:00
oprofile_stats.c	percpu: make percpu symbols in oprofile unique	2009-10-29 22:34:13 +09:00
oprofile_stats.h	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
oprofilefs.c	oprofile: Fix uninitialized memory access when writing to writing to oprofilefs	2012-01-06 14:17:04 -08:00
timer_int.c	oprofile: Fix crash when unloading module (hr timer mode)	2011-12-09 08:55:55 -08:00