Wang Yufen 2c21ee020c tracing: Fix memory leak in tracing_read_pipe() ... commit 649e72070c 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
..
bpf	bpf: Initialize same number of free nodes for each pcpu_freelist	2022-11-26 09:24:38 +01:00
cgroup	cgroup/cpuset: Enable update_tasks_cpumask() on top_cpuset	2022-10-26 12:35:25 +02:00
configs
debug
dma
entry
events	perf: Fix missing SIGTRAPs	2022-11-03 23:59:15 +09:00
gcov	gcov: support GCC 12.1 and newer compilers	2022-10-26 12:35:56 +02:00
irq
kcsan
livepatch
locking
power	PM: hibernate: Allow hybrid sleep to work with s2idle	2022-11-03 23:59:17 +09:00
printk
rcu	rcu-tasks: Convert RCU_LOCKDEP_WARN() to WARN_ONCE()	2022-10-26 12:35:29 +02:00
sched	sched/core: Fix comparison in sched_group_cookie_match()	2022-11-03 23:59:15 +09:00
time
trace	tracing: Fix memory leak in tracing_read_pipe()	2022-11-26 09:24:42 +01:00
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