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c62e7ac395
The generic netlink is initialized far after the netlink protocol itself at subsys_initcall. The devlink is initialized at the same level, but after, as shown by a disassembly of the vmlinux: [ ... ] 374 ffff8000115f22c0 <__initcall_devlink_init4>: 375 ffff8000115f22c4 <__initcall_genl_init4>: [ ... ] The function devlink_init() calls genl_register_family() before the generic netlink subsystem is initialized. As the generic netlink initcall level is set since 2005, it seems that was not a problem, but now we have the thermal framework initialized at the core_initcall level which creates the generic netlink family and sends a notification which leads to a subtle memory corruption only detectable when the CONFIG_INIT_ON_ALLOC_DEFAULT_ON option is set with the earlycon at init time. The thermal framework needs to be initialized early in order to begin the mitigation as soon as possible. Moving it to postcore_initcall is acceptable. This patch changes the initialization level for the generic netlink family to the core_initcall and comes after the netlink protocol initialization. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: David S. Miller <davem@davemloft.net> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Link: https://lore.kernel.org/r/20200715074120.8768-1-daniel.lezcano@linaro.org |
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| .. | ||
| af_netlink.c | ||
| af_netlink.h | ||
| diag.c | ||
| genetlink.c | ||
| Kconfig | ||
| Makefile | ||
| policy.c | ||