From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f199.google.com (mail-oi1-f199.google.com [209.85.167.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C53D62BE051 for ; Thu, 23 Apr 2026 16:33:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776961984; cv=none; b=eRFE2MLYKjJX6HlMpeFWOWy5CjhD2mEiFdbFvPC873/o9C7K2xOi5GIRfSTcmWr5DYCprT3ShxXFyY9iFq9QEXB9ek+FYOWTilamqiz0YX25jE6uDWwPzbpByAISEjwM7UlnnF9WEXhOFNWii1sPMV9cAPWQua1Dk5Jz67Fqnt0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776961984; c=relaxed/simple; bh=SBJEtL7OT9ndlTPPQZfYDWdLfMyqbuGlqsOBavX6hlY=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=qsVUY/rcQsNE552q0gu8vDzWABMnOUVrZu5VYkVGKthqvLN2qnj2BHN8J38Z7D5G2gtlAYKqtGj+Ns74V5+TM3twAPfVtd/n4bdMbMA0/SQLr9PWb3dUuOO8YEPJwagJcTb87p0j2BxqugRAqALhLlT9b1+sCr54jS6/6GEiZUk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f199.google.com with SMTP id 5614622812f47-46f083f82c7so12479674b6e.1 for ; Thu, 23 Apr 2026 09:33:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776961982; x=1777566782; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=cpHa6h7sLAet3IaiBV2Wsowc0wgpxOmHd83TFf9jME0=; b=Zqu5vdtWZvOe0q5Q0RS9PfgeQgD+pZNYHtG9H9dNyrxOsWCfdOOus7qtn+cu88pcKA /yf7sBZ0EkF4ldjnYDmeyfjuWYCOivmkrMcWcRLBzjyRJjjeTofg82RLPXvYM6fojuPw xNmwDOx6GnGz3McW12NvTs2qJ5l57G6Ad4ejMobfELCAIgDsJITrQqBJENcVLUyk2juD 6ZBgqWgx5NENZzWbFctjfcbv7tTyYyqRuMrwSYEpOzercd7yE5uQ3200Eez9WdwcclWX Jygn1yhbFLFoTh6hzQdYNrmLAibVC+1b7EMoWr0r+yR47oJW16PuHmZlTtRVkOFdMd4A wNlg== X-Forwarded-Encrypted: i=1; AFNElJ+JDnSoZA2eBBUgzD7IxgDTB7RCGyuhVn3njiTr3I3xi524TKo8K2affrU/79USzQEe/mMXCWSYGCevxWg=@vger.kernel.org X-Gm-Message-State: AOJu0YwVWjPWtRhKTlZ9+Q0BotiAvtdijx9vSGqzc0r6M0fcOeCoFfRR EKr+t2iOewozeLm6upQwrvP1IZc3/L2I1i35DYsq/j3jcDy+baVClMgw1CNkZeZFukfPGNUtH/q h0o2qJJwDPN1B4H2wur2QnxYT/U/L29AAjznmjVMWSyYyN3gahFSAfPZRKBA= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:338f:20b0:684:aef0:e54f with SMTP id 006d021491bc7-694636fe350mr9323827eaf.16.1776961981707; Thu, 23 Apr 2026 09:33:01 -0700 (PDT) Date: Thu, 23 Apr 2026 09:33:01 -0700 In-Reply-To: <20260423161034.GA1343000@shredder> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69ea49bd.a00a0220.17a17.0043.GAE@google.com> Subject: Re: [syzbot] [bridge?] possible deadlock in br_multicast_rcv (3) From: syzbot To: idosch@nvidia.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: unregister_netdevice: waiting for DEV to become free oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=4553,uid=0 Memory cgroup out of memory: Killed process 4553 (syz-executor.0) total-vm:42280kB, anon-rss:448kB, file-rss:772kB, shmem-rss:4kB, UID:0 pgtables:52kB oom_score_adj:0 unregister_netdevice: waiting for syz_tun to become free. Usage count = 10 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_hold include/linux/netdevice.h:4465 [inline] dst_init+0x90/0x17c net/core/dst.c:52 dst_alloc+0xb8/0xe0 net/core/dst.c:94 rt_dst_alloc net/ipv4/route.c:1651 [inline] __mkroute_output net/ipv4/route.c:2655 [inline] ip_route_output_key_hash_rcu+0xa88/0xda0 net/ipv4/route.c:2875 ip_route_output_key_hash+0xe4/0x1a4 net/ipv4/route.c:2705 __ip_route_output_key include/net/route.h:169 [inline] ip_route_output_flow+0x38/0xb0 net/ipv4/route.c:2932 ip_route_output_key include/net/route.h:179 [inline] geneve_link_config+0x9c/0x268 drivers/net/geneve.c:2106 geneve_newlink+0xf4/0x12c drivers/net/geneve.c:2164 rtnl_newlink_create+0x130/0x43c net/core/rtnetlink.c:3862 __rtnl_newlink net/core/rtnetlink.c:3993 [inline] rtnl_newlink+0xbec/0xdf8 net/core/rtnetlink.c:4108 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 netlink_rcv_skb+0xf8/0x1dc net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7021 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x36c/0x4c4 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x408/0x510 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x1b0/0x274 net/socket.c:2206 __do_sys_sendto net/socket.c:2213 [inline] __se_sys_sendto net/socket.c:2209 [inline] __arm64_sys_sendto+0x30/0x44 net/socket.c:2209 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_tracker_alloc include/linux/netdevice.h:4448 [inline] netdev_get_by_index+0x7c/0xd4 net/core/dev.c:1027 fib6_nh_init+0xac/0xed0 net/ipv6/route.c:3600 ip6_route_info_create_nh+0xa0/0x654 net/ipv6/route.c:3899 ip6_route_add+0x8c/0x1a0 net/ipv6/route.c:3951 addrconf_prefix_route net/ipv6/addrconf.c:2487 [inline] addrconf_add_linklocal+0x21c/0x324 net/ipv6/addrconf.c:3312 addrconf_addr_gen+0x268/0x2a4 net/ipv6/addrconf.c:3446 addrconf_init_auto_addrs+0x388/0x658 net/ipv6/addrconf.c:-1 addrconf_notify+0x678/0x858 net/ipv6/addrconf.c:3744 notifier_call_chain+0x110/0x3c0 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2249 [inline] call_netdevice_notifiers_extack net/core/dev.c:2287 [inline] call_netdevice_notifiers net/core/dev.c:2301 [inline] __dev_notify_flags+0x174/0x32c net/core/dev.c:-1 netif_change_flags+0x80/0xa4 net/core/dev.c:9849 do_setlink+0x568/0x1a88 net/core/rtnetlink.c:3180 rtnl_changelink net/core/rtnetlink.c:3798 [inline] __rtnl_newlink net/core/rtnetlink.c:3971 [inline] rtnl_newlink+0xb94/0xdf8 net/core/rtnetlink.c:4108 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 netlink_rcv_skb+0xf8/0x1dc net/netlink/af_netlink.c:2550 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_tracker_alloc include/linux/netdevice.h:4448 [inline] netdev_get_by_index+0x7c/0xd4 net/core/dev.c:1027 fib6_nh_init+0xac/0xed0 net/ipv6/route.c:3600 ip6_route_info_create_nh+0xa0/0x654 net/ipv6/route.c:3899 addrconf_f6i_alloc+0x138/0x1f4 net/ipv6/route.c:4691 ipv6_add_addr+0x2a0/0x600 net/ipv6/addrconf.c:1125 addrconf_add_linklocal+0x114/0x324 net/ipv6/addrconf.c:3310 addrconf_addr_gen+0x268/0x2a4 net/ipv6/addrconf.c:3446 addrconf_init_auto_addrs+0x388/0x658 net/ipv6/addrconf.c:-1 addrconf_notify+0x678/0x858 net/ipv6/addrconf.c:3744 notifier_call_chain+0x110/0x3c0 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2249 [inline] call_netdevice_notifiers_extack net/core/dev.c:2287 [inline] call_netdevice_notifiers net/core/dev.c:2301 [inline] __dev_notify_flags+0x174/0x32c net/core/dev.c:-1 netif_change_flags+0x80/0xa4 net/core/dev.c:9849 do_setlink+0x568/0x1a88 net/core/rtnetlink.c:3180 rtnl_changelink net/core/rtnetlink.c:3798 [inline] __rtnl_newlink net/core/rtnetlink.c:3971 [inline] rtnl_newlink+0xb94/0xdf8 net/core/rtnetlink.c:4108 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_tracker_alloc include/linux/netdevice.h:4448 [inline] netdev_get_by_index+0x7c/0xd4 net/core/dev.c:1027 fib6_nh_init+0xac/0xed0 net/ipv6/route.c:3600 ip6_route_info_create_nh+0xa0/0x654 net/ipv6/route.c:3899 ip6_route_add+0x8c/0x1a0 net/ipv6/route.c:3951 addrconf_add_mroute net/ipv6/addrconf.c:2551 [inline] addrconf_add_dev+0x150/0x1d8 net/ipv6/addrconf.c:2569 addrconf_dev_config net/ipv6/addrconf.c:3483 [inline] addrconf_init_auto_addrs+0x31c/0x658 net/ipv6/addrconf.c:3571 addrconf_notify+0x678/0x858 net/ipv6/addrconf.c:3744 notifier_call_chain+0x110/0x3c0 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2249 [inline] call_netdevice_notifiers_extack net/core/dev.c:2287 [inline] call_netdevice_notifiers net/core/dev.c:2301 [inline] __dev_notify_flags+0x174/0x32c net/core/dev.c:-1 netif_change_flags+0x80/0xa4 net/core/dev.c:9849 do_setlink+0x568/0x1a88 net/core/rtnetlink.c:3180 rtnl_changelink net/core/rtnetlink.c:3798 [inline] __rtnl_newlink net/core/rtnetlink.c:3971 [inline] rtnl_newlink+0xb94/0xdf8 net/core/rtnetlink.c:4108 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 netlink_rcv_skb+0xf8/0x1dc net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7021 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_tracker_alloc include/linux/netdevice.h:4448 [inline] netdev_get_by_index+0x7c/0xd4 net/core/dev.c:1027 fib6_nh_init+0xac/0xed0 net/ipv6/route.c:3600 ip6_route_info_create_nh+0xa0/0x654 net/ipv6/route.c:3899 ip6_route_add+0x8c/0x1a0 net/ipv6/route.c:3951 addrconf_prefix_route net/ipv6/addrconf.c:2487 [inline] fixup_permanent_addr net/ipv6/addrconf.c:3602 [inline] addrconf_permanent_addr+0x3fc/0x57c net/ipv6/addrconf.c:3626 addrconf_notify+0x598/0x858 net/ipv6/addrconf.c:3698 notifier_call_chain+0x110/0x3c0 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2249 [inline] call_netdevice_notifiers_extack net/core/dev.c:2287 [inline] call_netdevice_notifiers net/core/dev.c:2301 [inline] __dev_notify_flags+0x174/0x32c net/core/dev.c:-1 netif_change_flags+0x80/0xa4 net/core/dev.c:9849 do_setlink+0x568/0x1a88 net/core/rtnetlink.c:3180 rtnl_changelink net/core/rtnetlink.c:3798 [inline] __rtnl_newlink net/core/rtnetlink.c:3971 [inline] rtnl_newlink+0xb94/0xdf8 net/core/rtnetlink.c:4108 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 netlink_rcv_skb+0xf8/0x1dc net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7021 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x36c/0x4c4 net/netlink/af_netlink.c:1344 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_hold include/linux/netdevice.h:4465 [inline] fib_check_nh_nongw net/ipv4/fib_semantics.c:1262 [inline] fib_check_nh+0x638/0xd30 net/ipv4/fib_semantics.c:1282 fib_create_info+0xba0/0xfa0 net/ipv4/fib_semantics.c:1502 fib_table_insert+0x6c/0x914 net/ipv4/fib_trie.c:1212 fib_magic+0x14c/0x1a8 net/ipv4/fib_frontend.c:1134 fib_add_ifaddr+0x200/0x258 net/ipv4/fib_frontend.c:1178 fib_netdev_event+0x2b4/0x3a4 net/ipv4/fib_frontend.c:1516 notifier_call_chain+0x110/0x3c0 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2249 [inline] call_netdevice_notifiers_extack net/core/dev.c:2287 [inline] call_netdevice_notifiers net/core/dev.c:2301 [inline] __dev_notify_flags+0x174/0x32c net/core/dev.c:-1 netif_change_flags+0x80/0xa4 net/core/dev.c:9849 do_setlink+0x568/0x1a88 net/core/rtnetlink.c:3180 rtnl_changelink net/core/rtnetlink.c:3798 [inline] __rtnl_newlink net/core/rtnetlink.c:3971 [inline] rtnl_newlink+0xb94/0xdf8 net/core/rtnetlink.c:4108 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 netlink_rcv_skb+0xf8/0x1dc net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7021 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x36c/0x4c4 net/netlink/af_netlink.c:1344 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_hold include/linux/netdevice.h:4465 [inline] fib_check_nh_nongw net/ipv4/fib_semantics.c:1262 [inline] fib_check_nh+0x638/0xd30 net/ipv4/fib_semantics.c:1282 fib_create_info+0xba0/0xfa0 net/ipv4/fib_semantics.c:1502 fib_table_insert+0x6c/0x914 net/ipv4/fib_trie.c:1212 fib_magic+0x14c/0x1a8 net/ipv4/fib_frontend.c:1134 fib_add_ifaddr+0x1c0/0x258 net/ipv4/fib_frontend.c:1171 fib_netdev_event+0x2b4/0x3a4 net/ipv4/fib_frontend.c:1516 notifier_call_chain+0x110/0x3c0 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2249 [inline] call_netdevice_notifiers_extack net/core/dev.c:2287 [inline] call_netdevice_notifiers net/core/dev.c:2301 [inline] __dev_notify_flags+0x174/0x32c net/core/dev.c:-1 netif_change_flags+0x80/0xa4 net/core/dev.c:9849 do_setlink+0x568/0x1a88 net/core/rtnetlink.c:3180 rtnl_changelink net/core/rtnetlink.c:3798 [inline] __rtnl_newlink net/core/rtnetlink.c:3971 [inline] rtnl_newlink+0xb94/0xdf8 net/core/rtnetlink.c:4108 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 netlink_rcv_skb+0xf8/0x1dc net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7021 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x36c/0x4c4 net/netlink/af_netlink.c:1344 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_tracker_alloc include/linux/netdevice.h:4448 [inline] netdev_get_by_index+0x7c/0xd4 net/core/dev.c:1027 fib6_nh_init+0xac/0xed0 net/ipv6/route.c:3600 ip6_route_info_create_nh+0xa0/0x654 net/ipv6/route.c:3899 addrconf_f6i_alloc+0x138/0x1f4 net/ipv6/route.c:4691 ipv6_add_addr+0x2a0/0x600 net/ipv6/addrconf.c:1125 inet6_addr_add+0x1e4/0x62c net/ipv6/addrconf.c:3049 inet6_rtm_newaddr+0x4f8/0x658 net/ipv6/addrconf.c:5063 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 netlink_rcv_skb+0xf8/0x1dc net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7021 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x36c/0x4c4 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x408/0x510 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x1b0/0x274 net/socket.c:2206 __do_sys_sendto net/socket.c:2213 [inline] __se_sys_sendto net/socket.c:2209 [inline] __arm64_sys_sendto+0x30/0x44 net/socket.c:2209 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x64/0x110 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x8c/0x164 arch/arm64/kernel/syscall.c:132 ref_tracker: netdev@000000008f35972d has 1/9 users at __netdev_tracker_alloc include/linux/netdevice.h:4436 [inline] netdev_tracker_alloc+0x5c/0xa4 include/linux/netdevice.h:4448 fib_create_info+0xf54/0xfa0 net/ipv4/fib_semantics.c:1496 fib_table_insert+0x6c/0x914 net/ipv4/fib_trie.c:1212 fib_magic+0x14c/0x1a8 net/ipv4/fib_frontend.c:1134 fib_add_ifaddr+0x90/0x258 net/ipv4/fib_frontend.c:1156 fib_inetaddr_event+0x8c/0x124 net/ipv4/fib_frontend.c:1470 notifier_call_chain+0x110/0x3c0 kernel/notifier.c:85 blocking_notifier_call_chain+0x54/0x84 kernel/notifier.c:380 __inet_insert_ifa+0x464/0x58c net/ipv4/devinet.c:566 inet_rtm_newaddr+0x790/0x9f0 net/ipv4/devinet.c:1001 rtnetlink_rcv_msg+0x4b4/0x648 net/core/rtnetlink.c:6994 netlink_rcv_skb+0xf8/0x1dc net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7021 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x36c/0x4c4 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x408/0x510 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x1b0/0x274 net/socket.c:2206 Tested on: commit: e583f808 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=138912d2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f5089b548f519d67 dashboard link: https://syzkaller.appspot.com/bug?extid=d7b7f1412c02134efa6d compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=14cb6c36580000