JIRA: https://issues.redhat.com/browse/RHEL-57751
commit 1ad84a151af7f4b3933983677bc75074f957bdf5
Author: Maxime Chevallier <maxime.chevallier@bootlin.com>
Date: Fri Sep 13 12:05:14 2024 +0200
net: ethtool: phy: Don't set the context dev pointer for unfiltered DUMP
The context info allows continuing DUMP requests, shall they fill the
netlink buffer.
In the case of filtered DUMP requests, a reference on the netdev is
grabbed in the .start() callback and release in .done().
Unfiltered DUMP request don't need the dev pointer to be set in the context
info, doing so will trigger an unwanted netdev_put() in .done().
Reported-by: syzbot+e9ed4e4368d450c8f9db@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/netdev/000000000000d3bf150621d361a7@google.com/
Fixes: 17194be4c8e1 ("net: ethtool: Introduce a command to list PHYs on an interface")
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20240913100515.167341-1-maxime.chevallier@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
d2245e8984