Eric Dumazet 047fe36052 splice: fix racy pipe->buffers uses ... Dave Jones reported a kernel BUG at mm/slub.c:3474! triggered by splice_shrink_spd() called from vmsplice_to_pipe() commit 35f3d14dbb (pipe: add support for shrinking and growing pipes) added capability to adjust pipe->buffers. Problem is some paths don't hold pipe mutex and assume pipe->buffers doesn't change for their duration. Fix this by adding nr_pages_max field in struct splice_pipe_desc, and use it in place of pipe->buffers where appropriate. splice_shrink_spd() loses its struct pipe_inode_info argument. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Tom Herbert <therbert@google.com> Cc: stable <stable@vger.kernel.org> # 2.6.35 Tested-by: Dave Jones <davej@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2012-06-13 21:16:42 +02:00
..
blktrace.c	simple_open: automatically convert to simple_open()	2012-04-05 15:25:50 -07:00
ftrace.c	ftrace/x86: Have x86 ftrace use the ftrace_modify_all_code()	2012-05-16 20:00:27 -04:00
Kconfig	Merge branch 'perf-uprobes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-05-24 11:39:34 -07:00
Makefile	Merge branch 'perf-uprobes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-05-24 11:39:34 -07:00
power-traces.c	perf: Clean up power events by introducing new, more generic ones	2011-01-04 08:16:54 +01:00
ring_buffer_benchmark.c	tracing: Use NUMA allocation for per-cpu ring buffer pages	2011-06-14 22:04:39 -04:00
ring_buffer.c	ring-buffer: Check for valid buffer before changing size	2012-05-23 15:35:17 -04:00
rpm-traces.c	PM / Runtime: Introduce trace points for tracing rpm_* functions	2011-09-27 22:53:27 +02:00
trace_branch.c
trace_clock.c	tracing: Add a counter clock for those that do not trust clocks	2011-09-19 11:35:58 -04:00
trace_entries.h	Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent	2012-03-24 08:19:09 +01:00
trace_event_perf.c	ftrace, perf: Add filter support for function trace event	2012-02-21 11:08:30 -05:00
trace_events_filter_test.h	tracing/filter: Add startup tests for events filter	2011-08-19 14:35:59 -04:00
trace_events_filter.c	ftrace, perf: Add filter support for function trace event	2012-02-21 11:08:30 -05:00
trace_events.c	tracing: Do not enable function event with enable	2012-05-10 15:55:43 -04:00
trace_export.c	tracing: Do not enable function event with enable	2012-05-10 15:55:43 -04:00
trace_functions_graph.c	tracing: Still trace filtered irq functions when irq trace is disabled	2011-07-07 22:26:27 -04:00
trace_functions.c	ftrace: Fix regression of :mod:module function enabling	2011-07-07 11:30:08 -04:00
trace_irqsoff.c	Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core	2011-11-11 08:19:37 +01:00
trace_kdb.c	kdb,ftdump: Remove reference to internal kdb include	2010-10-22 15:34:11 -05:00
trace_kprobe.c	tracing: Provide trace events interface for uprobes	2012-05-07 14:30:17 +02:00
trace_mmiotrace.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
trace_nop.c
trace_output.c	tracing: Fix stacktrace of latency tracers (irqsoff and friends)	2012-04-19 17:00:13 -04:00
trace_output.h
trace_printk.c	tracing: Add percpu buffers for trace_printk()	2012-04-23 21:15:55 -04:00
trace_probe.c	tracing: Provide trace events interface for uprobes	2012-05-07 14:30:17 +02:00
trace_probe.h	tracing: Provide trace events interface for uprobes	2012-05-07 14:30:17 +02:00
trace_sched_switch.c	tracing: Remove obsolete sched_switch tracer	2011-02-08 17:14:56 -05:00
trace_sched_wakeup.c	tracing/latency: Fix header output for latency tracers	2011-11-07 13:48:35 -05:00
trace_selftest_dynamic.c	ftrace: Add self-tests for multiple function trace users	2011-05-18 19:24:51 -04:00
trace_selftest.c	ftrace: Add self-tests for multiple function trace users	2011-05-18 19:24:51 -04:00
trace_stack.c	tracing: Have stack tracing set filtered functions at boot	2011-12-21 07:26:49 -05:00
trace_stat.c
trace_stat.h
trace_syscalls.c	ftrace, perf: Add add/del tracepoint perf registration actions	2012-02-21 11:08:25 -05:00
trace_uprobe.c	tracing: Provide trace events interface for uprobes	2012-05-07 14:30:17 +02:00
trace.c	splice: fix racy pipe->buffers uses	2012-06-13 21:16:42 +02:00
trace.h	Merge branch 'perf-uprobes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-05-24 11:39:34 -07:00