CVE-2022-49800

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> tracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()<br /> <br /> test_gen_synth_cmd() only free buf in fail path, hence buf will leak<br /> when there is no failure. Add kfree(buf) to prevent the memleak. The<br /> same reason and solution in test_empty_synth_event().<br /> <br /> unreferenced object 0xffff8881127de000 (size 2048):<br /> comm "modprobe", pid 247, jiffies 4294972316 (age 78.756s)<br /> hex dump (first 32 bytes):<br /> 20 67 65 6e 5f 73 79 6e 74 68 5f 74 65 73 74 20 gen_synth_test<br /> 20 70 69 64 5f 74 20 6e 65 78 74 5f 70 69 64 5f pid_t next_pid_<br /> backtrace:<br /> [] kmalloc_trace+0x26/0x100<br /> [] 0xffffffffa00083cd<br /> [] 0xffffffffa00086ba<br /> [] do_one_initcall+0xdb/0x480<br /> [] do_init_module+0x1cf/0x680<br /> [] load_module+0x6a50/0x70a0<br /> [] __do_sys_finit_module+0x12f/0x1c0<br /> [] do_syscall_64+0x3f/0x90<br /> [] entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> unreferenced object 0xffff8881127df000 (size 2048):<br /> comm "modprobe", pid 247, jiffies 4294972324 (age 78.728s)<br /> hex dump (first 32 bytes):<br /> 20 65 6d 70 74 79 5f 73 79 6e 74 68 5f 74 65 73 empty_synth_tes<br /> 74 20 20 70 69 64 5f 74 20 6e 65 78 74 5f 70 69 t pid_t next_pi<br /> backtrace:<br /> [] kmalloc_trace+0x26/0x100<br /> [] 0xffffffffa0008071<br /> [] 0xffffffffa00086ce<br /> [] do_one_initcall+0xdb/0x480<br /> [] do_init_module+0x1cf/0x680<br /> [] load_module+0x6a50/0x70a0<br /> [] __do_sys_finit_module+0x12f/0x1c0<br /> [] do_syscall_64+0x3f/0x90<br /> [] entry_SYSCALL_64_after_hwframe+0x63/0xcd