CVE-2023-54171

In the Linux kernel, the following vulnerability has been resolved: 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: [ ] __kmalloc+0x4f/0x140 [ ] trace_find_next_entry+0xbb/0x1d0 [ ] trace_print_lat_context+0xaf/0x4e0 [ ] print_trace_line+0x3e0/0x950 [ ] tracing_read_pipe+0x2d9/0x5a0 [ ] vfs_read+0x143/0x520 [ ] ksys_read+0xbd/0x160 [ ] do_syscall_64+0x3f/0x90 [ ] 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().