[PATCH] ipv6: addrconf: drop "BUG: " prefix from pr_warn()

[Pimyn Girgis <pimyn@google.com>]

Kernel warning messages emitted via pr_warn() already have the
appropriate log level (KERN_WARNING) and should not include manual
prefixes such as "BUG: " or "WARNING: ".

Explicit "BUG: " prefixes in log strings can mislead testing tools
like syzkaller, which scan kernel console output for "BUG: " to
identify kernel oopses, panics, and fatal conditions.

Remove the manual "BUG: " prefix from the pr_warn() call in
__ipv6_ifa_notify().

Fixes: 2d819d250a1393 ("ipv6: Handle missing host route in __ipv6_ifa_notify")
Reported-by: syzbot+ded267b328e950a7c0c4@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=ded267b328e950a7c0c4
Signed-off-by: Pimyn Girgis <pimyn@google.com>
---
 net/ipv6/addrconf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index f6fa2715b450b..8c714b4c0a9ba 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -6318,7 +6318,7 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
 		if (ifp->rt && !rcu_access_pointer(ifp->rt->fib6_node)) {
 			ip6_ins_rt(net, ifp->rt);
 		} else if (!ifp->rt && (ifp->idev->dev->flags & IFF_UP)) {
-			pr_warn("BUG: Address %pI6c on device %s is missing its host route.\n",
+			pr_warn("Address %pI6c on device %s is missing its host route.\n",
 				&ifp->addr, ifp->idev->dev->name);
 		}
 
-- 
2.55.0.654.g21b8a5bc05-goog