CVE-2022-49891

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> tracing: kprobe: Fix memory leak in test_gen_kprobe/kretprobe_cmd()<br /> <br /> test_gen_kprobe_cmd() only free buf in fail path, hence buf will leak<br /> when there is no failure. Move kfree(buf) from fail path to common path<br /> to prevent the memleak. The same reason and solution in<br /> test_gen_kretprobe_cmd().<br /> <br /> unreferenced object 0xffff888143b14000 (size 2048):<br /> comm "insmod", pid 52490, jiffies 4301890980 (age 40.553s)<br /> hex dump (first 32 bytes):<br /> 70 3a 6b 70 72 6f 62 65 73 2f 67 65 6e 5f 6b 70 p:kprobes/gen_kp<br /> 72 6f 62 65 5f 74 65 73 74 20 64 6f 5f 73 79 73 robe_test do_sys<br /> backtrace:<br /> [] kmalloc_trace+0x27/0xa0<br /> [] 0xffffffffa059006f<br /> [] do_one_initcall+0x87/0x2a0<br /> [] do_init_module+0xdf/0x320<br /> [] load_module+0x3006/0x3390<br /> [] __do_sys_finit_module+0x113/0x1b0<br /> [] do_syscall_64+0x35/0x80<br /> [] entry_SYSCALL_64_after_hwframe+0x46/0xb0