[Bug 271101] cxgbe(4): panic due to lock recursion while creating tracing interface
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Date: Wed, 03 Jan 2024 07:09:50 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271101
Navdeep Parhar <np@FreeBSD.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|In Progress |Closed
--- Comment #4 from Navdeep Parhar <np@FreeBSD.org> ---
This was fixed in e203cb393fe0 some time ago.
commit e203cb393fe0
Author: Navdeep Parhar <np@FreeBSD.org>
Date: Sat Sep 9 12:39:15 2023 -0700
cxgbe(4): Fix tracing with netlink enabled kernels.
1. The tracing ifnet's name must match the nexus name. One way to do
this is to not use a unit number.
2. Do not hold the tracer lock around ether_ifattach or ether_ifdetach.
netlink calls back into the driver (see stack below) and that leads
to illegal lock recursion.
tracer_ioctl
if_ioctl
get_operstate_ether
get_operstate
dump_iface
rtnl_handle_ifevent
rtnl_handle_ifattach
if_attach_internal
if_attach
ether_ifattach
t4_cloner_create
MFC after: 3 days
Sponsored by: Chelsio Communications
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