Alexey Dobriyan wrote:
Iterating code of /proc/kallsyms calls module_get_kallsym() which grabs and drops module_mutex internally and returns "struct module *", module is removed, aforementioned "struct module *" is used in non-trivial way.Steps to reproduce: modprobe/rmmod loop cat /proc/kallsyms >/dev/null loop Copy all needed info under module_mutex. NOTE: this patch keeps module_mutex static.
Yes, this patch fixes the "cat /proc/kallsyms" race without changing any "external" interfaces, so I think it should go into mainline in any case.
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