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bpf: add missing ops lock around dev_xdp_attach_link

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Syzkaller points out that create_link path doesn't grab ops lock,
add it.

Reported-by: syzbot+08936936fe8132f91f1a@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/bpf/67e6b3e8.050a0220.2f068f.0079.GAE@google.com/
Fixes: 97246d6d21 ("net: hold netdev instance lock during ndo_bpf")
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250331142814.1887506-1-sdf@fomichev.me
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Stanislav Fomichev
2025-03-31 07:28:14 -07:00
committed by Jakub Kicinski
parent 367579274f
commit d996e412b2
1 changed files with 2 additions and 0 deletions
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2
net/core/dev.c
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@@ -10284,7 +10284,9 @@ int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
goto unlock;
}
netdev_lock_ops(dev);
err = dev_xdp_attach_link(dev, &extack, link);
netdev_unlock_ops(dev);
rtnl_unlock();
if (err) {