From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (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 63BFE25E836 for ; Tue, 11 Mar 2025 16:36:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741710991; cv=none; b=FnuHjMvILCyjpVcu6yUf64CzSxWnmtF9BAWBWx5783DLeX/9smrAAm1CAZ/3Ca7NVOdBAQ3yn3Lfskjc3b0aS3zoXhQcxs6Ht5W4++eyVegyCU+jV25pHDH7T0Ui3zP1LD6xxnUWwHjrrrE4eWx657leUEfjLrnCLbJ6Y0iA/xY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741710991; c=relaxed/simple; bh=kzsNf4Zh01vd/TyJCB4EywREqHBCieiYgS6TZhj0xjk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=MCbCBMXjHSt+DAskoQd65SGqohcd75iGzfXwJo6s5/FPIG5rrgQ/xcB1htowh90fou5CcrcZcj8fssu3u1KftnSGdft450N90YqDUUVjQ49zBCAkiD04GBmfin8xS8wLgp0EFSGrJV/OlaDCB/SICKtIaMz02gaFToKQJlk7foU= 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=209.85.166.79 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-io1-f79.google.com with SMTP id ca18e2360f4ac-85b3f480d86so277727139f.3 for ; Tue, 11 Mar 2025 09:36:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741710986; x=1742315786; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=XvDG1mCBdvd+lGzYgqi++Uw9Xu55XL3uw7OiqAbhe0A=; b=isg+JOFMan8s/sFp7agsWwdn5OSuNNHPkRIOGWpDpDgXWhTFJOT9IDVFYuTzlKbb0c c3sh0q6bfjHNM3GrM4JUHiDLRtXWvqtDKoCjY0Fh/QJJyHuaIRNoeAwkN/70xk+WmA50 g0uHBGEBiiE0WGflwrOdy1KBXot5ZsyOwTnKRl87LXdlhMCQAfSIPUigE/u0aGzKkC6P CKJhKtUfabgUldQARyfiU6r9FYEJ4xFLfCllhIEjYKsoBN1ZqsDVxCpDOfOJHu13kclW OOSxw/ASk8GY8eLRyfHEAFvaGWyNG3IbWl5VFnYvwo4pyrcbSrPdfFL10uzKUj37Li67 f76Q== X-Forwarded-Encrypted: i=1; AJvYcCVFDuuPY+46puuXT85ayqdM4CeSjxBEAslnPAcriwXZez9ZYQv8z6+Xcc49us9I3j6UM951Kkc=@vger.kernel.org X-Gm-Message-State: AOJu0YzF1TfFzcFOMMg+mz+tXdAK/zN9q1kG+N9amyS74qISnNuh5lZb 8i+Y5+Y5Tv/sTI1XelrearZB8gnSdy8U7wxmoFMXskUArT/JGnNebk48cXYcMjWEhQOCzIk+f4H MXij8gksL4ULbguLhMc77vYo/9Ifc+A6iZe/dLygKnkM0Yhw4RK3pCz4= X-Google-Smtp-Source: AGHT+IEfX9x+iBRZb3hHXs/UHwzEA12kSN+kgazwubNySu1w6G9xMW49KjcbBSj+faWTOuavJczGxHPIBuyutzMaxuwkCucnNL+w Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1749:b0:3d1:968a:6d46 with SMTP id e9e14a558f8ab-3d44196905fmr172740425ab.6.1741710986471; Tue, 11 Mar 2025 09:36:26 -0700 (PDT) Date: Tue, 11 Mar 2025 09:36:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67d0668a.050a0220.1939a6.0028.GAE@google.com> Subject: [syzbot] [net?] BUG: sleeping function called from invalid context in dev_set_allmulti From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 40587f749df2 Merge branch 'enic-enable-32-64-byte-cqes-and.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=16b35478580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ca99d9d1f4a8ecfa dashboard link: https://syzkaller.appspot.com/bug?extid=368054937a6a7ead5f35 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6d02993a9211/disk-40587f74.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2c8b300bf362/vmlinux-40587f74.xz kernel image: https://storage.googleapis.com/syzbot-assets/2d5be21882cf/bzImage-40587f74.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+368054937a6a7ead5f35@syzkaller.appspotmail.com vlan2: entered allmulticast mode bond0: entered allmulticast mode bond_slave_0: entered allmulticast mode bond_slave_1: entered allmulticast mode team0: entered allmulticast mode team_slave_0: entered allmulticast mode team_slave_1: entered allmulticast mode batadv0: entered allmulticast mode BUG: sleeping function called from invalid context at kernel/locking/mutex.c:562 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 23629, name: syz.4.5165 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 3 locks held by syz.4.5165/23629: #0: ffffffff903f0bd0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff903f0bd0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff903f0bd0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:570 #1: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc4c/0x1d90 net/core/rtnetlink.c:4054 #2: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: team_change_rx_flags+0x29/0x330 drivers/net/team/team_core.c:1781 CPU: 1 UID: 0 PID: 23629 Comm: syz.4.5165 Not tainted 6.14.0-rc5-syzkaller-01183-g40587f749df2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 __might_resched+0x5d4/0x780 kernel/sched/core.c:8767 __mutex_lock_common kernel/locking/mutex.c:562 [inline] __mutex_lock+0x126/0x1010 kernel/locking/mutex.c:730 netdev_lock include/linux/netdevice.h:2731 [inline] netdev_lock_ops include/net/netdev_lock.h:40 [inline] dev_set_allmulti+0x11c/0x270 net/core/dev_api.c:279 team_change_rx_flags+0x1a8/0x330 drivers/net/team/team_core.c:1789 dev_change_rx_flags net/core/dev.c:9154 [inline] netif_set_allmulti+0x20e/0x380 net/core/dev.c:9256 dev_set_allmulti+0x143/0x270 net/core/dev_api.c:280 bond_set_allmulti drivers/net/bonding/bond_main.c:946 [inline] bond_change_rx_flags+0x4e1/0x6b0 drivers/net/bonding/bond_main.c:4737 dev_change_rx_flags net/core/dev.c:9154 [inline] netif_set_allmulti+0x20e/0x380 net/core/dev.c:9256 dev_set_allmulti+0x143/0x270 net/core/dev_api.c:280 vlan_dev_open+0x2be/0x8a0 net/8021q/vlan_dev.c:278 __dev_open+0x45a/0x8a0 net/core/dev.c:1644 netif_open+0xae/0x1b0 net/core/dev.c:1667 dev_open+0x13e/0x260 net/core/dev_api.c:191 bond_enslave+0x103c/0x3910 drivers/net/bonding/bond_main.c:2135 do_set_master+0x579/0x730 net/core/rtnetlink.c:2943 rtnl_newlink_create+0x6e6/0xbd0 net/core/rtnetlink.c:3837 __rtnl_newlink net/core/rtnetlink.c:3940 [inline] rtnl_newlink+0x167a/0x1d90 net/core/rtnetlink.c:4055 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6945 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:709 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:724 ____sys_sendmsg+0x53a/0x860 net/socket.c:2564 ___sys_sendmsg net/socket.c:2618 [inline] __sys_sendmsg+0x269/0x350 net/socket.c:2650 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe00998d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe00a843038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe009ba5fa0 RCX: 00007fe00998d169 RDX: 0000000000000000 RSI: 0000400000000280 RDI: 0000000000000003 RBP: 00007fe009a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe009ba5fa0 R15: 00007ffdc9be6f48 ============================= [ BUG: Invalid wait context ] 6.14.0-rc5-syzkaller-01183-g40587f749df2 #0 Tainted: G W ----------------------------- syz.4.5165/23629 is trying to lock: ffff88807bce0d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline] ffff88807bce0d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline] ffff88807bce0d28 (&dev->lock){+.+.}-{4:4}, at: dev_set_allmulti+0x11c/0x270 net/core/dev_api.c:279 other info that might help us debug this: context-{5:5} 3 locks held by syz.4.5165/23629: #0: ffffffff903f0bd0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff903f0bd0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff903f0bd0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:570 #1: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc4c/0x1d90 net/core/rtnetlink.c:4054 #2: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: team_change_rx_flags+0x29/0x330 drivers/net/team/team_core.c:1781 stack backtrace: CPU: 1 UID: 0 PID: 23629 Comm: syz.4.5165 Tainted: G W 6.14.0-rc5-syzkaller-01183-g40587f749df2 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4828 [inline] check_wait_context kernel/locking/lockdep.c:4900 [inline] __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5178 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730 netdev_lock include/linux/netdevice.h:2731 [inline] netdev_lock_ops include/net/netdev_lock.h:40 [inline] dev_set_allmulti+0x11c/0x270 net/core/dev_api.c:279 team_change_rx_flags+0x1a8/0x330 drivers/net/team/team_core.c:1789 dev_change_rx_flags net/core/dev.c:9154 [inline] netif_set_allmulti+0x20e/0x380 net/core/dev.c:9256 dev_set_allmulti+0x143/0x270 net/core/dev_api.c:280 bond_set_allmulti drivers/net/bonding/bond_main.c:946 [inline] bond_change_rx_flags+0x4e1/0x6b0 drivers/net/bonding/bond_main.c:4737 dev_change_rx_flags net/core/dev.c:9154 [inline] netif_set_allmulti+0x20e/0x380 net/core/dev.c:9256 dev_set_allmulti+0x143/0x270 net/core/dev_api.c:280 vlan_dev_open+0x2be/0x8a0 net/8021q/vlan_dev.c:278 __dev_open+0x45a/0x8a0 net/core/dev.c:1644 netif_open+0xae/0x1b0 net/core/dev.c:1667 dev_open+0x13e/0x260 net/core/dev_api.c:191 bond_enslave+0x103c/0x3910 drivers/net/bonding/bond_main.c:2135 do_set_master+0x579/0x730 net/core/rtnetlink.c:2943 rtnl_newlink_create+0x6e6/0xbd0 net/core/rtnetlink.c:3837 __rtnl_newlink net/core/rtnetlink.c:3940 [inline] rtnl_newlink+0x167a/0x1d90 net/core/rtnetlink.c:4055 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6945 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:709 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:724 ____sys_sendmsg+0x53a/0x860 net/socket.c:2564 ___sys_sendmsg net/socket.c:2618 [inline] __sys_sendmsg+0x269/0x350 net/socket.c:2650 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe00998d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe00a843038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe009ba5fa0 RCX: 00007fe00998d169 RDX: 0000000000000000 RSI: 0000400000000280 RDI: 0000000000000003 RBP: 00007fe009a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe009ba5fa0 R15: 00007ffdc9be6f48 netdevsim netdevsim4 netdevsim0: entered allmulticast mode bond0: left allmulticast mode bond_slave_0: left allmulticast mode bond_slave_1: left allmulticast mode team0: left allmulticast mode team_slave_0: left allmulticast mode team_slave_1: left allmulticast mode batadv0: left allmulticast mode BUG: sleeping function called from invalid context at kernel/locking/mutex.c:562 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 23629, name: syz.4.5165 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 INFO: lockdep is turned off. CPU: 0 UID: 0 PID: 23629 Comm: syz.4.5165 Tainted: G W 6.14.0-rc5-syzkaller-01183-g40587f749df2 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 __might_resched+0x5d4/0x780 kernel/sched/core.c:8767 __mutex_lock_common kernel/locking/mutex.c:562 [inline] __mutex_lock+0x126/0x1010 kernel/locking/mutex.c:730 netdev_lock include/linux/netdevice.h:2731 [inline] netdev_lock_ops include/net/netdev_lock.h:40 [inline] dev_set_allmulti+0x11c/0x270 net/core/dev_api.c:279 team_change_rx_flags+0x1a8/0x330 drivers/net/team/team_core.c:1789 dev_change_rx_flags net/core/dev.c:9154 [inline] netif_set_allmulti+0x20e/0x380 net/core/dev.c:9256 dev_set_allmulti+0x143/0x270 net/core/dev_api.c:280 bond_set_allmulti drivers/net/bonding/bond_main.c:946 [inline] bond_change_rx_flags+0x4e1/0x6b0 drivers/net/bonding/bond_main.c:4737 dev_change_rx_flags net/core/dev.c:9154 [inline] netif_set_allmulti+0x20e/0x380 net/core/dev.c:9256 dev_set_allmulti+0x143/0x270 net/core/dev_api.c:280 vlan_dev_stop+0xb0/0x330 net/8021q/vlan_dev.c:320 __dev_close_many+0x3a6/0x700 net/core/dev.c:1717 dev_close_many+0x24e/0x4c0 net/core/dev.c:1742 netif_close+0x1c0/0x2c0 net/core/dev.c:1759 dev_close+0x137/0x280 net/core/dev_api.c:210 bond_enslave+0x26ca/0x3910 drivers/net/bonding/bond_main.c:2438 do_set_master+0x579/0x730 net/core/rtnetlink.c:2943 rtnl_newlink_create+0x6e6/0xbd0 net/core/rtnetlink.c:3837 __rtnl_newlink net/core/rtnetlink.c:3940 [inline] rtnl_newlink+0x167a/0x1d90 net/core/rtnetlink.c:4055 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6945 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:709 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:724 ____sys_sendmsg+0x53a/0x860 net/socket.c:2564 ___sys_sendmsg net/socket.c:2618 [inline] __sys_sendmsg+0x269/0x350 net/socket.c:2650 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe00998d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe00a843038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe009ba5fa0 RCX: 00007fe00998d169 RDX: 0000000000000000 RSI: 0000400000000280 RDI: 0000000000000003 RBP: 00007fe009a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe009ba5fa0 R15: 00007ffdc9be6f48 netdevsim netdevsim4 netdevsim0: left allmulticast mode --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup