Re: [syzbot] [net?] WARNING in __linkwatch_sync_dev (2)
From: Jakub Kicinski <kuba@kernel.org>
Date: 2025-06-13 23:56:38
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On Thu, 12 Jun 2025 18:09:02 -0700 Stanislav Fomichev wrote:
Where linkwatch_do_dev (potentially called from ethtool_op_get_link and bond_check_dev_link) might trigger ipv6 address assignment so I'm not sure how this all supposed to work under rcu and without rtnl lock.
Yeah, linkwatch seems to also try to allocate memory with GFP_KERNEL.
Tentatively (untested uncompiled):
I think miimon recheck period may be rather frequent, but given the above going back to rtnl is probably the sanest way out.