CVE-2022-49801

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> tracing: Fix memory leak in tracing_read_pipe()<br /> <br /> kmemleak reports this issue:<br /> <br /> unreferenced object 0xffff888105a18900 (size 128):<br /> comm "test_progs", pid 18933, jiffies 4336275356 (age 22801.766s)<br /> hex dump (first 32 bytes):<br /> 25 73 00 90 81 88 ff ff 26 05 00 00 42 01 58 04 %s......&amp;...B.X.<br /> 03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 ................<br /> backtrace:<br /> [] __kmalloc_node_track_caller+0x4a/0x140<br /> [] krealloc+0x8d/0xf0<br /> [] trace_iter_expand_format+0x99/0x150<br /> [] trace_check_vprintf+0x1e0/0x11d0<br /> [] trace_event_printf+0xb6/0xf0<br /> [] trace_raw_output_bpf_trace_printk+0x89/0xc0<br /> [] print_trace_line+0x73c/0x1480<br /> [] tracing_read_pipe+0x45c/0x9f0<br /> [] vfs_read+0x17b/0x7c0<br /> [] ksys_read+0xed/0x1c0<br /> [] do_syscall_64+0x3b/0x90<br /> [] entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> <br /> iter-&gt;fmt alloced in<br /> tracing_read_pipe() -&gt; .. -&gt;trace_iter_expand_format(), but not<br /> freed, to fix, add free in tracing_release_pipe()