PCI: Fix reset_method_store() memory leak

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: PCI: Fix reset_method_store() memory leak In reset_method_store(), a string is allocated via kstrndup() and assigned to the local "options". options is then used in with strsep() to find spaces: while ((name = strsep(&options, " ")) != NULL) { If there are no remaining spaces, then options is set to NULL by strsep(), so the subsequent kfree(options) doesn't free the memory allocated via kstrndup(). Fix by using a separate tmp_options to iterate with strsep() so options is preserved.

References

• https://git.kernel.org/stable/c/403efb4457c0c8f8f51e904cc57d39193780c6bd
• https://git.kernel.org/stable/c/931d07ccffcc3614f20aaf602b31e89754e21c59
• https://git.kernel.org/stable/c/8e098baf6bc3f3a6aefc383509aba07e202f7ee0
• https://git.kernel.org/stable/c/543d0eb40e45c6a51f1bff02f417b602e54472d5
• https://git.kernel.org/stable/c/fe6fae61f3b993160aef5fe2b7141a83872c144f
• https://git.kernel.org/stable/c/2985b1844f3f3447f2d938eff1ef6762592065a5