CVE-2022-50304

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> mtd: core: fix possible resource leak in init_mtd()<br /> <br /> I got the error report while inject fault in init_mtd():<br /> <br /> sysfs: cannot create duplicate filename &amp;#39;/devices/virtual/bdi/mtd-0&amp;#39;<br /> Call Trace:<br /> <br /> dump_stack_lvl+0x67/0x83<br /> sysfs_warn_dup+0x60/0x70<br /> sysfs_create_dir_ns+0x109/0x120<br /> kobject_add_internal+0xce/0x2f0<br /> kobject_add+0x98/0x110<br /> device_add+0x179/0xc00<br /> device_create_groups_vargs+0xf4/0x100<br /> device_create+0x7b/0xb0<br /> bdi_register_va.part.13+0x58/0x2d0<br /> bdi_register+0x9b/0xb0<br /> init_mtd+0x62/0x171 [mtd]<br /> do_one_initcall+0x6c/0x3c0<br /> do_init_module+0x58/0x222<br /> load_module+0x268e/0x27d0<br /> __do_sys_finit_module+0xd5/0x140<br /> do_syscall_64+0x37/0x90<br /> entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> <br /> kobject_add_internal failed for mtd-0 with -EEXIST, don&amp;#39;t try to register<br /> things with the same name in the same directory.<br /> Error registering mtd class or bdi: -17<br /> <br /> If init_mtdchar() fails in init_mtd(), mtd_bdi will not be unregistered,<br /> as a result, we can&amp;#39;t load the mtd module again, to fix this by calling<br /> bdi_unregister(mtd_bdi) after out_procfs label.