Slava Pestov 43807eba13 tracing: Fix panic when lseek() called on "trace" opened for writing ...

commit 364829b126 upstream.

The file_ops struct for the "trace" special file defined llseek as seq_lseek().
However, if the file was opened for writing only, seq_open() was not called,
and the seek would dereference a null pointer, file->private_data.

This patch introduces a new wrapper for seq_lseek() which checks if the file
descriptor is opened for reading first. If not, it does nothing.

Signed-off-by: Slava Pestov <slavapestov@google.com>
LKML-Reference: <1290640396-24179-1-git-send-email-slavapestov@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2011-01-07 14:43:10 -08:00

..

blktrace.c

Add a tracepoint for block request remapping

2009-10-01 21:19:34 +02:00

ftrace.c

tracing: t_start: reset FTRACE_ITER_HASH in case of seek/pread

2010-09-20 13:17:52 -07:00

Kconfig

trivial: Fix duplicated word "options" in comment

2009-09-21 15:14:58 +02:00

kmemtrace.c

kmemtrace: Fix up tracer registration

2009-10-01 11:53:44 +02:00

Makefile

tracing, perf: Convert the power tracer into an event tracer

2009-09-19 11:42:12 +02:00

power-traces.c

tracing, perf: Convert the power tracer into an event tracer

2009-09-19 11:42:12 +02:00

ring_buffer_benchmark.c

ring-buffer: have benchmark test print to trace buffer

2009-06-17 17:01:09 -04:00

ring_buffer.c

ring-buffer: Fix typo of time extends per page

2010-10-28 21:44:00 -07:00

trace_boot.c

tracing: add filter event logic to special, mmiotrace and boot tracers

2009-09-12 23:34:04 -04:00

trace_branch.c

tracing: user local buffer variable for trace branch tracer

2009-10-07 21:53:41 -04:00

trace_clock.c

tracing: optimize global_trace_clock cachelines

2009-09-15 12:24:22 -04:00

trace_entries.h

tracing, perf: Convert the power tracer into an event tracer

2009-09-19 11:42:12 +02:00

trace_event_profile.c

tracing: Use free_percpu instead of kfree

2009-10-05 10:57:56 +02:00

trace_events_filter.c

tracing/filters: Fix memory leak when setting a filter

2009-10-13 08:05:17 +02:00

trace_events.c

tracing: Check the return value of trace_get_user()

2009-09-22 10:28:55 +02:00

trace_export.c

tracing: remove some unused macros

2009-09-14 11:43:24 -04:00

trace_functions_graph.c

tracing: switch function prints from %pf to %ps

2009-09-17 15:53:40 -04:00

trace_functions.c

tracing: switch function prints from %pf to %ps

2009-09-17 15:53:40 -04:00

trace_hw_branches.c

tracing: fix warning on kernel/trace/trace_branch.c andtrace_hw_branches.c

2009-10-07 21:52:03 -04:00

trace_irqsoff.c

tracing: do not update tracing_max_latency when tracer is stopped

2009-09-12 21:45:17 -04:00

trace_mmiotrace.c

tracing: add filter event logic to special, mmiotrace and boot tracers

2009-09-12 23:34:04 -04:00

trace_nop.c

tracing/ftrace: make nop-tracer use polling wait for events on pipe

2009-03-23 09:22:15 +01:00

trace_output.c

tracing: Fix trace_seq_printf() return value

2009-10-24 11:07:50 +02:00

trace_output.h

tracing: consolidate code between trace_output.c and trace_function_graph.c

2009-09-11 14:24:13 -04:00

trace_printk.c

tracing: Remove markers

2009-09-18 21:22:08 +02:00

trace_sched_switch.c

tracing: pass around ring buffer instead of tracer

2009-09-04 18:59:39 -04:00

trace_sched_wakeup.c

tracing: do not update tracing_max_latency when tracer is stopped

2009-09-12 21:45:17 -04:00

trace_selftest_dynamic.c

…

trace_selftest.c

tracing/function-graph-tracer: Move graph event insertion helpers in the graph tracer file

2009-08-06 07:28:06 +02:00

trace_stack.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

trace_stat.c

trace_stat: Fix missing entry in stat file

2009-08-17 11:25:09 +02:00

trace_stat.h

tracing/stat: Add stat_release() callback

2009-07-10 12:14:05 +02:00

trace_syscalls.c

tracing/syscalls: Use long for syscall ret format and field definitions

2009-10-06 12:02:34 +02:00

trace_sysprof.c

Merge branch 'timers-for-linus-migration' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-15 10:06:19 -07:00

trace_workqueue.c

tracing/workqueues: Add refcnt to struct cpu_workqueue_stats

2009-07-10 12:14:07 +02:00

trace.c

tracing: Fix panic when lseek() called on "trace" opened for writing

2011-01-07 14:43:10 -08:00

trace.h

tracing: Fix ftrace_event_call alignment for use with gcc 4.5

2010-05-12 14:57:14 -07:00