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2c21ee020ce43d744ecd7f3e9bddfcaafef270ce
kernel_arpi/kernel/trace
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Wang Yufen 2c21ee020c tracing: Fix memory leak in tracing_read_pipe() 
commit 649e72070cbbb8600eb823833e4748f5a0815116 upstream.

kmemleak reports this issue:

unreferenced object 0xffff888105a18900 (size 128):
  comm "test_progs", pid 18933, jiffies 4336275356 (age 22801.766s)
  hex dump (first 32 bytes):
    25 73 00 90 81 88 ff ff 26 05 00 00 42 01 58 04  %s......&...B.X.
    03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000560143a1>] __kmalloc_node_track_caller+0x4a/0x140
    [<000000006af00822>] krealloc+0x8d/0xf0
    [<00000000c309be6a>] trace_iter_expand_format+0x99/0x150
    [<000000005a53bdb6>] trace_check_vprintf+0x1e0/0x11d0
    [<0000000065629d9d>] trace_event_printf+0xb6/0xf0
    [<000000009a690dc7>] trace_raw_output_bpf_trace_printk+0x89/0xc0
    [<00000000d22db172>] print_trace_line+0x73c/0x1480
    [<00000000cdba76ba>] tracing_read_pipe+0x45c/0x9f0
    [<0000000015b58459>] vfs_read+0x17b/0x7c0
    [<000000004aeee8ed>] ksys_read+0xed/0x1c0
    [<0000000063d3d898>] do_syscall_64+0x3b/0x90
    [<00000000a06dda7f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

iter->fmt alloced in
  tracing_read_pipe() -> .. ->trace_iter_expand_format(), but not
freed, to fix, add free in tracing_release_pipe()

Link: https://lkml.kernel.org/r/1667819090-4643-1-git-send-email-wangyufen@huawei.com

Cc: stable@vger.kernel.org
Fixes: efbbdaa22b ("tracing: Show real address for trace event arguments")
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-11-26 09:24:42 +01:00
..
blktrace.c
blktrace: Trace remapped requests correctly
2022-08-17 14:23:13 +02:00
bpf_trace.c
bpf: Add MEM_RDONLY for helper args that are pointers to rdonly mem.
2022-05-01 17:22:26 +02:00
bpf_trace.h
…
error_report-traces.c
…
fgraph.c
…
ftrace_internal.h
…
ftrace.c
ftrace: Fix null pointer dereference in ftrace_add_mod()
2022-11-26 09:24:42 +01:00
Kconfig
…
kprobe_event_gen_test.c
tracing: kprobe: Fix memory leak in test_gen_kprobe/kretprobe_cmd()
2022-11-10 18:15:38 +01:00
Makefile
tracing: Place trace_pid_list logic into abstract functions
2022-07-29 17:25:29 +02:00
pid_list.c
tracing: Place trace_pid_list logic into abstract functions
2022-07-29 17:25:29 +02:00
pid_list.h
tracing: Place trace_pid_list logic into abstract functions
2022-07-29 17:25:29 +02:00
power-traces.c
…
preemptirq_delay_test.c
…
ring_buffer_benchmark.c
…
ring_buffer.c
ring_buffer: Do not deactivate non-existant pages
2022-11-26 09:24:42 +01:00
rpm-traces.c
…
synth_event_gen_test.c
…
trace_benchmark.c
…
trace_benchmark.h
…
trace_boot.c
tracing: Initialize integer variable to prevent garbage return value
2022-06-09 10:23:21 +02:00
trace_branch.c
…
trace_clock.c
…
trace_dynevent.c
tracing: Disable "other" permission bits in the tracefs files
2021-11-18 19:16:15 +01:00
trace_dynevent.h
…
trace_entries.h
…
trace_eprobe.c
tracing: Move duplicate code of trace_kprobe/eprobe.c into header
2022-10-26 12:34:31 +02:00
trace_event_perf.c
tracing/perf: Fix double put of trace event when init fails
2022-08-25 11:39:57 +02:00
trace_events_filter_test.h
…
trace_events_filter.c
tracing: Add ustring operation to filtering string pointers
2022-03-08 19:12:33 +01:00
trace_events_hist.c
tracing/histograms: Fix memory leak problem
2022-07-21 21:24:11 +02:00
trace_events_inject.c
…
trace_events_synth.c
tracing: Fix reading strings from synthetic events
2022-10-26 12:34:32 +02:00
trace_events_trigger.c
tracing: Fix to check event_mutex is held while accessing trigger list
2022-09-15 11:30:02 +02:00
trace_events.c
tracing: Have filter accept "common_cpu" to be consistent
2022-08-25 11:39:58 +02:00
trace_export.c
…
trace_functions_graph.c
tracing: Disable "other" permission bits in the tracefs files
2021-11-18 19:16:15 +01:00
trace_functions.c
…
trace_hwlat.c
tracing: Disable "other" permission bits in the tracefs files
2021-11-18 19:16:15 +01:00
trace_irqsoff.c
…
trace_kdb.c
…
trace_kprobe_selftest.c
…
trace_kprobe_selftest.h
…
trace_kprobe.c
tracing: Move duplicate code of trace_kprobe/eprobe.c into header
2022-10-26 12:34:31 +02:00
trace_mmiotrace.c
…
trace_nop.c
…
trace_osnoise.c
tracing/osnoise: Fix possible recursive locking in stop_per_cpu_kthreads
2022-10-26 12:35:27 +02:00
trace_output.c
tracing: Add migrate-disabled counter to tracing output.
2021-09-03 19:42:35 -04:00
trace_output.h
…
trace_preemptirq.c
tracing: hold caller_addr to hardirq_{enable,disable}_ip
2022-09-20 12:39:43 +02:00
trace_printk.c
tracing: Disable "other" permission bits in the tracefs files
2021-11-18 19:16:15 +01:00
trace_probe_kernel.h
tracing: Add "(fault)" name injection to kernel probes
2022-10-26 12:34:32 +02:00
trace_probe_tmpl.h
…
trace_probe.c
tracing/probes: Have kprobes and uprobes use $COMM too
2022-08-25 11:39:58 +02:00
trace_probe.h
…
trace_recursion_record.c
tracing: Disable "other" permission bits in the tracefs files
2021-11-18 19:16:15 +01:00
trace_sched_switch.c
…
trace_sched_wakeup.c
…
trace_selftest_dynamic.c
…
trace_selftest.c
…
trace_seq.c
…
trace_stack.c
tracing: Disable "other" permission bits in the tracefs files
2021-11-18 19:16:15 +01:00
trace_stat.c
tracing: Disable "other" permission bits in the tracefs files
2021-11-18 19:16:15 +01:00
trace_stat.h
…
trace_synth.h
tracing: synth events: increase max fields count
2021-09-08 15:29:16 -04:00
trace_syscalls.c
tracing: Make tp_printk work on syscall tracepoints
2022-06-14 18:36:14 +02:00
trace_uprobe.c
tracing/uprobes: Check the return value of kstrdup() for tu->filename
2022-03-08 19:12:38 +01:00
trace.c
tracing: Fix memory leak in tracing_read_pipe()
2022-11-26 09:24:42 +01:00
trace.h
tracing: Add '__rel_loc' using trace event macros
2022-08-17 14:24:26 +02:00
tracing_map.c
tracing: Fix a kmemleak false positive in tracing_map
2021-12-17 10:30:16 +01:00
tracing_map.h
…