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d5a821896360cc8b93a15bd888fabc858c038dc0
linux/kernel/trace
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Zheng Yejian d5a8218963 tracing: Fix memory leak of iter->temp when reading trace_pipe 
kmemleak reports:
  unreferenced object 0xffff88814d14e200 (size 256):
    comm "cat", pid 336, jiffies 4294871818 (age 779.490s)
    hex dump (first 32 bytes):
      04 00 01 03 00 00 00 00 08 00 00 00 00 00 00 00  ................
      0c d8 c8 9b ff ff ff ff 04 5a ca 9b ff ff ff ff  .........Z......
    backtrace:
      [<ffffffff9bdff18f>] __kmalloc+0x4f/0x140
      [<ffffffff9bc9238b>] trace_find_next_entry+0xbb/0x1d0
      [<ffffffff9bc9caef>] trace_print_lat_context+0xaf/0x4e0
      [<ffffffff9bc94490>] print_trace_line+0x3e0/0x950
      [<ffffffff9bc95499>] tracing_read_pipe+0x2d9/0x5a0
      [<ffffffff9bf03a43>] vfs_read+0x143/0x520
      [<ffffffff9bf04c2d>] ksys_read+0xbd/0x160
      [<ffffffff9d0f0edf>] do_syscall_64+0x3f/0x90
      [<ffffffff9d2000aa>] entry_SYSCALL_64_after_hwframe+0x6e/0xd8

when reading file 'trace_pipe', 'iter->temp' is allocated or relocated
in trace_find_next_entry() but not freed before 'trace_pipe' is closed.

To fix it, free 'iter->temp' in tracing_release_pipe().

Link: https://lore.kernel.org/linux-trace-kernel/20230713141435.1133021-1-zhengyejian1@huawei.com

Cc: stable@vger.kernel.org
Fixes: ff895103a8 ("tracing: Save off entry when peeking at next entry")
Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2023-07-13 10:48:36 -04:00
..
rv
Merge tag 'trace-tools-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2023-04-28 16:11:26 -07:00
blktrace.c
block: remove more NULL checks after bdev_get_queue()
2023-02-21 09:23:22 -07:00
bpf_trace.c
Merge tag 'probes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2023-06-30 10:44:53 -07:00
bpf_trace.h
…
error_report-traces.c
…
fgraph.c
tracing: arm64: Avoid missing-prototype warnings
2023-07-12 12:06:04 -04:00
fprobe.c
tracing/probes: Add fprobe events for tracing function entry and exit.
2023-06-06 21:39:55 +09:00
ftrace_internal.h
tracing: arm64: Avoid missing-prototype warnings
2023-07-12 12:06:04 -04:00
ftrace.c
ftrace: Fix possible warning on checking all pages used in ftrace_process_locs()
2023-07-12 17:47:37 -04:00
Kconfig
Merge tag 'probes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2023-06-30 10:44:53 -07:00
kprobe_event_gen_test.c
tracing: Fix wrong return in kprobe_event_gen_test.c
2023-03-19 12:20:48 -04:00
Makefile
tracing/probes: Add fprobe events for tracing function entry and exit.
2023-06-06 21:39:55 +09:00
pid_list.c
tracing: Cleanup double word in comment
2022-04-26 17:58:50 -04:00
pid_list.h
tracing: Create a sparse bitmask for pid filtering
2021-10-05 17:38:45 -04:00
power-traces.c
…
preemptirq_delay_test.c
…
rethook.c
fprobe: Pass return address to the handlers
2023-06-06 21:39:55 +09:00
ring_buffer_benchmark.c
ring_buffer: Remove unused "event" parameter
2022-11-23 19:08:30 -05:00
ring_buffer.c
ring-buffer: Fix deadloop issue on reading trace_pipe
2023-07-12 12:15:26 -04:00
rpm-traces.c
…
synth_event_gen_test.c
tracing: Always use canonical ftrace path
2023-02-18 14:34:09 -05:00
trace_benchmark.c
tracing: Add numeric delta time to the trace event benchmark
2022-09-26 13:01:09 -04:00
trace_benchmark.h
tracing: Add numeric delta time to the trace event benchmark
2022-09-26 13:01:09 -04:00
trace_boot.c
tracing/boot: Test strscpy() against less than zero for error
2023-07-05 10:30:49 -04:00
trace_branch.c
…
trace_clock.c
…
trace_dynevent.c
tracing: Free buffers when a used dynamic event is removed
2022-11-23 19:07:12 -05:00
trace_dynevent.h
tracing: Add DYNAMIC flag for dynamic events
2021-08-18 18:10:32 -04:00
trace_entries.h
function_graph: Support recording and printing the return value of function
2023-06-20 18:38:37 -04:00
trace_eprobe.c
tracing/probes: Move event parameter fetching code to common parser
2023-06-06 21:39:56 +09:00
trace_event_perf.c
tracing/perf: Use strndup_user instead of kzalloc/strncpy_from_user
2022-11-23 19:08:31 -05:00
trace_events_filter_test.h
…
trace_events_filter.c
tracing: Add a way to filter function addresses to function names
2023-01-25 10:31:11 -05:00
trace_events_hist.c
tracing/histograms: Add histograms to hist_vars if they have referenced variables
2023-07-12 19:08:56 -04:00
trace_events_inject.c
tracing: Replace all non-returning strlcpy with strscpy
2023-05-26 13:52:19 -07:00
trace_events_synth.c
tracing/synthetic: Make lastcmd_mutex static
2023-04-06 15:08:18 -04:00
trace_events_trigger.c
tracing: Do not synchronize freeing of trigger filter on boot up
2022-12-14 08:50:56 -05:00
trace_events_user.c
tracing/user_events: Fix struct arg size match check
2023-07-10 21:38:13 -04:00
trace_events.c
Merge tag 'hardening-v6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2023-06-27 21:24:18 -07:00
trace_export.c
tracing: Fix TASK_COMM_LEN in trace event format file
2023-02-12 10:23:39 -05:00
trace_fprobe.c
tracing/probes: Add $arg* meta argument for all function args
2023-06-06 21:39:56 +09:00
trace_functions_graph.c
function_graph: Support recording and printing the return value of function
2023-06-20 18:38:37 -04:00
trace_functions.c
ftrace: disable preemption when recursion locked
2021-10-27 11:21:49 -04:00
trace_hwlat.c
tracing/hwlat: Replace sched_setaffinity with set_cpus_allowed_ptr
2023-03-19 13:23:22 -04:00
trace_irqsoff.c
…
trace_kdb.c
kdb: Rename members of struct kdbtab_t
2021-07-27 17:05:06 +01:00
trace_kprobe_selftest.c
tracing: arm64: Avoid missing-prototype warnings
2023-07-12 12:06:04 -04:00
trace_kprobe_selftest.h
…
trace_kprobe.c
Merge tag 'probes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2023-06-30 10:44:53 -07:00
trace_mmiotrace.c
…
trace_nop.c
…
trace_osnoise.c
tracing/timerlat: Add user-space interface
2023-06-22 10:39:56 -04:00
trace_output.c
Merge tag 'trace-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2023-06-30 10:33:17 -07:00
trace_output.h
tracing: Add "fields" option to show raw trace event fields
2023-03-29 06:52:08 -04:00
trace_preemptirq.c
cpuidle: tracing, preempt: Squash _rcuidle tracing
2023-01-31 15:01:46 +01:00
trace_printk.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_probe_kernel.h
kernel/trace: Provide default impelentations defined in trace_probe_tmpl.h
2023-02-24 09:44:27 +09:00
trace_probe_tmpl.h
kernel/trace: extract common part in process_fetch_insn
2023-02-24 10:04:13 +09:00
trace_probe.c
Merge tag 'probes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2023-06-30 10:44:53 -07:00
trace_probe.h
tracing/probes: Add BTF retval type support
2023-06-06 21:39:56 +09:00
trace_recursion_record.c
tracing: Use trace_create_file() to simplify creation of tracefs entries
2022-05-26 21:12:52 -04:00
trace_sched_switch.c
sched/tracing: Append prev_state to tp args instead
2022-05-12 00:37:11 +02:00
trace_sched_wakeup.c
sched/tracing: Append prev_state to tp args instead
2022-05-12 00:37:11 +02:00
trace_selftest_dynamic.c
…
trace_selftest.c
tracing: Have function_graph selftest call cond_resched()
2023-05-28 21:15:46 -04:00
trace_seq.c
tracing: Acquire buffer from temparary trace sequence
2023-02-07 12:42:54 -05:00
trace_stack.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_stat.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_stat.h
…
trace_synth.h
tracing: Allow synthetic events to pass around stacktraces
2023-01-25 10:31:24 -05:00
trace_syscalls.c
tracing: Remove unused __bad_type_size() method
2022-11-17 20:21:06 -05:00
trace_uprobe.c
tracing/probes: Move event parameter fetching code to common parser
2023-06-06 21:39:56 +09:00
trace.c
tracing: Fix memory leak of iter->temp when reading trace_pipe
2023-07-13 10:48:36 -04:00
trace.h
Merge tag 'probes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2023-06-30 10:44:53 -07:00
tracing_map.c
tracing: Remove unused variable 'dups'
2022-10-03 12:20:31 -04:00
tracing_map.h
…