Re: [PATCH v1] net/ipv6/addrconf.c: Check the return value of __in6_dev_get() in addrconf_type_change()

[Cong Wang]

On Sat, Aug 20, 2022 at 03:24:34AM -0700, lily wrote:
> The function __in6_dev_get() could return NULL pointer. This needs to be
> checked before used in ipv6_mc_remap() and ipv6_mc_unmap(). Otherwise it
> could result in null pointer dereference.

Its caller already checks it:

3689                 if (idev)
3690                         addrconf_type_change(dev, event);
3691                 break;