Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Steven Rostedt (VMware) 2e584b1a02 tracing: Check length before giving out the filter buffer ... commit b220c049d5196dd94d992dd2dc8cba1a5e6123bf upstream. When filters are used by trace events, a page is allocated on each CPU and used to copy the trace event fields to this page before writing to the ring buffer. The reason to use the filter and not write directly into the ring buffer is because a filter may discard the event and there's more overhead on discarding from the ring buffer than the extra copy. The problem here is that there is no check against the size being allocated when using this page. If an event asks for more than a page size while being filtered, it will get only a page, leading to the caller writing more that what was allocated. Check the length of the request, and if it is more than PAGE_SIZE minus the header default back to allocating from the ring buffer directly. The ring buffer may reject the event if its too big anyway, but it wont overflow. Link: https://lore.kernel.org/ath10k/1612839593-2308-1-git-send-email-wgong@codeaurora.org/ Cc: stable@vger.kernel.org Fixes: 0fc1b09ff1 ("tracing: Use temp buffer when filtering events") Reported-by: Wen Gong <wgong@codeaurora.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-02-23 13:59:15 +01:00
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blktrace.c	blktrace: break out of blktrace setup on concurrent calls	2020-06-30 15:38:43 -04:00
bpf_trace.c	bpf: fix check of allowed specifiers in bpf_trace_printk	2018-12-17 09:38:33 +01:00
ftrace.c	fgraph: Initialize tracing_graph_pause at task creation	2021-02-23 13:59:14 +01:00
Kconfig	Stop the ad-hoc games with -Wno-maybe-initialized	2020-05-20 08:15:37 +02:00
Makefile	Disable the __builtin_return_address() warning globally after all	2016-10-12 10:23:41 -07:00
power-traces.c	cpufreq: schedutil: New governor based on scheduler utilization data	2016-04-02 01:09:12 +02:00
ring_buffer.c	tracing: Fix race in trace_open and buffer resize call	2021-01-30 13:27:16 +01:00
ring_buffer_benchmark.c	ring_buffer: Remove unneeded smp_wmb() before wakeup of reader benchmark	2015-11-03 16:19:02 -05:00
rpm-traces.c
trace.c	tracing: Check length before giving out the filter buffer	2021-02-23 13:59:15 +01:00
trace.h	tracing: Fix userstacktrace option for instances	2020-12-11 13:38:01 +01:00
trace_benchmark.c	tracing: Only benchmark the time tracepoints take if tracing is on	2015-11-02 13:34:58 -05:00
trace_benchmark.h
trace_branch.c
trace_clock.c
trace_entries.h	tracing: Set kernel_stack's caller size properly	2020-10-01 20:40:05 +02:00
trace_event_perf.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-05-17 16:26:30 -07:00
trace_events.c	tracing: Do not count ftrace events in top level enable output	2021-02-23 13:59:15 +01:00
trace_events_filter.c	tracing: Fix regex_match_front() to not over compare the test string	2018-05-16 10:08:43 +02:00
trace_events_filter_test.h
trace_events_hist.c	tracing: Use strncpy instead of memcpy for string keys in hist triggers	2019-03-23 13:19:45 +01:00
trace_events_trigger.c	tracing: Fix event trigger to accept redundant spaces	2020-06-30 15:38:45 -04:00
trace_export.c	tracing: ftrace_event_is_function() can return boolean	2015-11-02 14:28:05 -05:00
trace_functions.c	ftrace: Have set_ftrace_pid use the bitmap like events do	2016-06-20 09:54:19 -04:00
trace_functions_graph.c	tracing: Fix missing return symbol in function_graph output	2018-07-11 16:26:43 +02:00
trace_hwlat.c	tracing/hwlat: Honor the tracing_cpumask	2020-08-26 10:29:03 +02:00
trace_irqsoff.c	tracing: Remove redundant reset per-CPU buff in irqsoff tracer	2016-03-18 16:39:11 -04:00
trace_kdb.c	tracing: Silence GCC 9 array bounds warning	2019-07-10 09:55:28 +02:00
trace_kprobe.c	tracing: Quiet gcc warning about maybe unused link variable	2018-08-03 07:55:12 +02:00
trace_mmiotrace.c	tracing: Expose CPU physical addresses (resource values) for PCI devices	2016-06-20 09:54:22 -04:00
trace_nop.c	tracing: Fix typoes in code comment and printk in trace_nop.c	2016-03-08 11:23:57 -05:00
trace_output.c	tracing: Add NMI tracing in hwlat detector	2016-09-02 12:47:55 -04:00
trace_output.h
trace_printk.c	tracing: Handle NULL formats in hold_module_trace_bprintk_format()	2016-06-20 09:46:12 -04:00
trace_probe.c	tracing: probeevent: Fix to support minus offset from symbol	2018-03-28 18:39:23 +02:00
trace_probe.h	tracing: probeevent: Fix to support minus offset from symbol	2018-03-28 18:39:23 +02:00
trace_sched_switch.c
trace_sched_wakeup.c	kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail	2020-01-14 20:04:26 +01:00
trace_selftest.c	ftrace: Handle tracing when switching between context	2020-11-10 10:24:02 +01:00
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c	tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined	2020-01-14 20:04:26 +01:00
trace_stat.c	tracing: Fix very unlikely race of registering two stat tracers	2020-02-28 15:42:21 +01:00
trace_stat.h
trace_syscalls.c	tracing/syscalls: fix multiline in error message text	2016-09-29 10:25:23 +02:00
trace_uprobe.c	tracing/uprobes: Fix output for multiple string arguments	2019-02-20 10:18:32 +01:00
tracing_map.c	tracing: Have the histogram compare functions convert to u64 first	2020-01-12 11:24:14 +01:00
tracing_map.h	tracing: Update some tracing_map constants and comments	2016-04-19 12:16:06 -04:00