From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 65A1A13C3CD for ; Tue, 13 Aug 2024 08:51:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723539085; cv=none; b=QN84O4s/nIFvn57XMjH7uc7R3d5D5EvyER3so6CQLUYQenGKfATtBO115qkkp6nPCKdahVrO/P5JTnitNrDZKjZJpl5RIJTgZuyv1XiS/oBeK4RJ4LSc9vX+5DeTngwNFmfGUXKejoyJubzb5T9/7OLYAWnvV/AuF3GIae7Vy8k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723539085; c=relaxed/simple; bh=WznQwjGPxvTmclHnZKSzEGIKkIHdlFNXItITSQ+WJUE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=tTntwjjt09QjqLEW3SP6XFxfMWAzLdHO9Oaoh55f5E4vFR2KAIFHUEY3vH58oBe2FUTrP6fU6dFy7Ltz+tTQn6wzSNyUdPiHwzBq0i1KXVK3a6Q79KhwC52RVsi5eo1ahkKpu4ok532EcHWsm7MCmRxGX2YP7455rmadDxwIAjI= 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=209.85.166.70 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-f70.google.com with SMTP id ca18e2360f4ac-81f901cd3b5so705242239f.1 for ; Tue, 13 Aug 2024 01:51:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723539082; x=1724143882; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=AK0nuk42RhiF1PKAdJxUgR6W8c2KHHAZqJGbPQdKTuY=; b=cWjQgNV+7Z85ZjMH/3AObZ+QMXtGnTiHfWVfRMDfZeFW5UorS3L3CS5nBqaU9muqIR 36BZp0EDW5hr4gdNJkbupcaiZvzfWetpAUNsfpzf7T7ESlcIALjvtGxeVqecg8KbsL2f BUJCgdJO/apCYeNXabA2PvfNbGel3EkzNq9ljGCDIZDnwHW3ZtBgVFW3u4AFALp3UKUv fhcUtLbyAgTkPYRLFwlBSkXvSkyAiKGXTRrG4YiepiyJB+FcyyhbqQGoZcL91iRXcVu7 UPQZvrAyhni41yhNQ+e2S+I02RzIOkc93E2hQP9ilWo9mVAR25qIcC2+rx9QKWrOTXok 2T4A== X-Forwarded-Encrypted: i=1; AJvYcCViH919DwVsgyp0D9ejngumWp1NBxJMJ7oxPuu3K7kGk75J+o6+HFI9YLzm/JYoOJfZ0032kOVZUbDXaAg7AH+eG6wdoheI X-Gm-Message-State: AOJu0YyZpsBltlCEZtAJBDp5l0XTf1QQw0mGouGqBTj1ay4xkpPh/dn4 +kZ6nGWm1iCB9rLT/SVS00xVZCtiVu8TZDUdffzGDjxjX9x3kqSVxQNZkqBJ5ngjTLycLNFX6nd aZYqhwK0iIyy8FU4PKVXcqBnfq/75ZJG9AmkpXW9tynqlX5WGoGf2qiI= X-Google-Smtp-Source: AGHT+IHQY5SluLnhYxGLOsHMMW5Nj6F26EvqyJ41AJ2zLzLj5NXpsJczd14b4EwfLr0MBk0Rs+4QLAPwlZfJqk7WAun2c2ThN7+W Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:410c:b0:4c0:9a3e:c263 with SMTP id 8926c6da1cb9f-4ca9f44e7d3mr150180173.0.1723539082567; Tue, 13 Aug 2024 01:51:22 -0700 (PDT) Date: Tue, 13 Aug 2024 01:51:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c5f090061f8cb618@google.com> Subject: [syzbot] [net?] KASAN: slab-use-after-free Read in team_dummy_transmit From: syzbot To: davem@davemloft.net, edumazet@google.com, jiri@resnulli.us, 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: d0d0cd380055 Merge tag '6.10-rc7-smb3-client-fix' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14cbb8f6980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3456bae478301dc8 dashboard link: https://syzkaller.appspot.com/bug?extid=82be73e8a10acaf29122 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-d0d0cd38.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f66b25353da2/vmlinux-d0d0cd38.xz kernel image: https://storage.googleapis.com/syzbot-assets/f0742b62ea1e/bzImage-d0d0cd38.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+82be73e8a10acaf29122@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] BUG: KASAN: slab-use-after-free in refcount_read include/linux/refcount.h:136 [inline] BUG: KASAN: slab-use-after-free in skb_unref include/linux/skbuff.h:1222 [inline] BUG: KASAN: slab-use-after-free in __kfree_skb_reason net/core/skbuff.c:1195 [inline] BUG: KASAN: slab-use-after-free in kfree_skb_reason+0x36/0x210 net/core/skbuff.c:1222 Read of size 4 at addr ffff88802cdde364 by task syz.2.1851/10652 CPU: 3 PID: 10652 Comm: syz.2.1851 Not tainted 6.10.0-rc7-syzkaller-00256-gd0d0cd380055 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] refcount_read include/linux/refcount.h:136 [inline] skb_unref include/linux/skbuff.h:1222 [inline] __kfree_skb_reason net/core/skbuff.c:1195 [inline] kfree_skb_reason+0x36/0x210 net/core/skbuff.c:1222 dev_kfree_skb_any_reason+0x72/0x80 net/core/dev.c:3199 dev_kfree_skb_any include/linux/netdevice.h:3854 [inline] team_dummy_transmit+0x1a/0x30 drivers/net/team/team_core.c:502 team_xmit+0x34f/0x470 drivers/net/team/team_core.c:1721 __netdev_start_xmit include/linux/netdevice.h:4882 [inline] netdev_start_xmit include/linux/netdevice.h:4896 [inline] __dev_direct_xmit+0x59e/0x740 net/core/dev.c:4449 dev_direct_xmit include/linux/netdevice.h:3108 [inline] packet_xmit+0x1e4/0x360 net/packet/af_packet.c:285 packet_snd net/packet/af_packet.c:3080 [inline] packet_sendmsg+0x24a5/0x51e0 net/packet/af_packet.c:3112 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc803d75bd9 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:00007fc804c20048 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fc803f03f60 RCX: 00007fc803d75bd9 RDX: 000000000000fc13 RSI: 0000000020000280 RDI: 000000000000000d RBP: 00007fc803de4e60 R08: 0000000000000000 R09: 000000000000002f R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fc803f03f60 R15: 00007ffd23ee3e88 Allocated by task 10652: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4002 [inline] kmem_cache_alloc_node_noprof+0x153/0x310 mm/slub.c:4045 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:656 alloc_skb include/linux/skbuff.h:1308 [inline] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6504 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2794 packet_alloc_skb net/packet/af_packet.c:2929 [inline] packet_snd net/packet/af_packet.c:3023 [inline] packet_sendmsg+0x1e25/0x51e0 net/packet/af_packet.c:3112 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 10652: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4438 [inline] kmem_cache_free+0x12f/0x3a0 mm/slub.c:4513 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1131 __kfree_skb net/core/skbuff.c:1188 [inline] kfree_skb_reason+0x138/0x210 net/core/skbuff.c:1223 kfree_skb include/linux/skbuff.h:1257 [inline] ____dev_forward_skb include/linux/netdevice.h:3999 [inline] __dev_forward_skb2+0x2d7/0x750 net/core/dev.c:2183 veth_forward_skb drivers/net/veth.c:320 [inline] veth_xmit+0x2ac/0xad0 drivers/net/veth.c:375 __netdev_start_xmit include/linux/netdevice.h:4882 [inline] netdev_start_xmit include/linux/netdevice.h:4896 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x143/0x790 net/core/dev.c:3594 __dev_queue_xmit+0x7ba/0x4130 net/core/dev.c:4393 dev_queue_xmit include/linux/netdevice.h:3095 [inline] team_dev_queue_xmit include/linux/if_team.h:242 [inline] team_queue_override_transmit drivers/net/team/team_core.c:814 [inline] team_xmit+0x194/0x470 drivers/net/team/team_core.c:1719 __netdev_start_xmit include/linux/netdevice.h:4882 [inline] netdev_start_xmit include/linux/netdevice.h:4896 [inline] __dev_direct_xmit+0x59e/0x740 net/core/dev.c:4449 dev_direct_xmit include/linux/netdevice.h:3108 [inline] packet_xmit+0x1e4/0x360 net/packet/af_packet.c:285 packet_snd net/packet/af_packet.c:3080 [inline] packet_sendmsg+0x24a5/0x51e0 net/packet/af_packet.c:3112 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802cdde280 which belongs to the cache skbuff_head_cache of size 240 The buggy address is located 228 bytes inside of freed 240-byte region [ffff88802cdde280, ffff88802cdde370) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2cdde head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88803f831801 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888019298780 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080190019 00000001ffffefff ffff88803f831801 head: 00fff00000000040 ffff888019298780 0000000000000000 dead000000000001 head: 0000000000000000 0000000080190019 00000001ffffefff ffff88803f831801 head: 00fff00000000001 ffffea0000b37781 ffffffffffffffff 0000000000000000 head: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4913, tgid 4913 (dhcpcd), ts 35329000207, free_ts 32097151920 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1473 prep_new_page mm/page_alloc.c:1481 [inline] get_page_from_freelist+0x1353/0x2e50 mm/page_alloc.c:3425 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4683 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x56/0x110 mm/slub.c:2265 allocate_slab mm/slub.c:2428 [inline] new_slab+0x84/0x260 mm/slub.c:2481 ___slab_alloc+0xdac/0x1870 mm/slub.c:3667 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3990 [inline] kmem_cache_alloc_node_noprof+0xed/0x310 mm/slub.c:4045 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:656 alloc_skb include/linux/skbuff.h:1308 [inline] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6504 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2794 unix_dgram_sendmsg+0x4b8/0x1a60 net/unix/af_unix.c:1976 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x50a/0x5c0 net/socket.c:1160 do_iter_readv_writev+0x504/0x780 fs/read_write.c:741 vfs_writev+0x36f/0xde0 fs/read_write.c:971 do_writev+0x287/0x370 fs/read_write.c:1018 page last free pid 4857 tgid 4857 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1093 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2588 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2809 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Memory state around the buggy address: ffff88802cdde200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ffff88802cdde280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802cdde300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc ^ ffff88802cdde380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff88802cdde400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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