From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CE9E023C3 for ; Thu, 7 Sep 2023 15:22:27 +0000 (UTC) Received: from mail-pf1-f205.google.com (mail-pf1-f205.google.com [209.85.210.205]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6BEFA1700 for ; Thu, 7 Sep 2023 08:22:01 -0700 (PDT) Received: by mail-pf1-f205.google.com with SMTP id d2e1a72fcca58-68e3660aaeaso1457339b3a.1 for ; Thu, 07 Sep 2023 08:22:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1694100121; x=1694704921; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ETTpdSI14BQREpOUwYzQRF8PwciHKTs4Os9GJbbc4Qw=; 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syzkaller Message-ID: <000000000000e44e4a0604c66b67@google.com> Subject: [syzbot] [net?] KASAN: slab-use-after-free Read in team_device_event From: syzbot To: ap420073@gmail.com, 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" X-Spam-Status: No, score=0.9 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SORTED_RECIPS,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Hello, syzbot found the following issue on: HEAD commit: f8fdd54ee6a1 Merge branch 'sja1105-fixes' git tree: net console+strace: https://syzkaller.appspot.com/x/log.txt?x=15476748680000 kernel config: https://syzkaller.appspot.com/x/.config?x=634e05b4025da9da dashboard link: https://syzkaller.appspot.com/bug?extid=44ae022028805f4600fc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12838914680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117e54dc680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3e90dbfb0a87/disk-f8fdd54e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ca3cbcaceef2/vmlinux-f8fdd54e.xz kernel image: https://storage.googleapis.com/syzbot-assets/a57b5f1bd614/bzImage-f8fdd54e.xz The issue was bisected to: commit 39285e124edbc752331e98ace37cc141a6a3747a Author: Taehee Yoo Date: Tue Sep 5 08:46:10 2023 +0000 net: team: do not use dynamic lockdep key bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16f177f4680000 final oops: https://syzkaller.appspot.com/x/report.txt?x=15f177f4680000 console output: https://syzkaller.appspot.com/x/log.txt?x=11f177f4680000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+44ae022028805f4600fc@syzkaller.appspotmail.com Fixes: 39285e124edb ("net: team: do not use dynamic lockdep key") 8021q: adding VLAN 0 to HW filter on device bond1 ================================================================== BUG: KASAN: slab-out-of-bounds in team_device_event+0xa3b/0xad0 drivers/net/team/team.c:3021 Read of size 8 at addr ffff888143fdc1a8 by task syz-executor133/5151 CPU: 0 PID: 5151 Comm: syz-executor133 Not tainted 6.5.0-syzkaller-04043-gf8fdd54ee6a1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 team_device_event+0xa3b/0xad0 drivers/net/team/team.c:3021 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1970 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] netdev_features_change net/core/dev.c:1333 [inline] netdev_update_features net/core/dev.c:9874 [inline] netdev_update_features net/core/dev.c:9871 [inline] dev_disable_lro+0x224/0x3e0 net/core/dev.c:1606 team_port_add drivers/net/team/team.c:1248 [inline] team_add_slave+0x1a4d/0x2310 drivers/net/team/team.c:1977 do_set_master+0x1bc/0x220 net/core/rtnetlink.c:2674 do_setlink+0xa07/0x3fa0 net/core/rtnetlink.c:2873 __rtnl_newlink+0xc1d/0x1940 net/core/rtnetlink.c:3671 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3718 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6444 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:728 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:751 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2539 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2593 __sys_sendmsg+0x117/0x1e0 net/socket.c:2622 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff3deaf85d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd3e202a18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff3deaf85d9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 5151: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:985 [inline] __kmalloc_node_track_caller+0x5e/0x100 mm/slab_common.c:1005 kstrdup+0x3c/0x70 mm/util.c:62 kstrdup_const+0x5f/0x70 mm/util.c:85 __kernfs_new_node+0x9c/0x8a0 fs/kernfs/dir.c:607 kernfs_new_node+0x94/0x110 fs/kernfs/dir.c:675 kernfs_create_link+0xcc/0x230 fs/kernfs/symlink.c:39 sysfs_do_create_link_sd+0x90/0x140 fs/sysfs/symlink.c:44 sysfs_do_create_link fs/sysfs/symlink.c:80 [inline] sysfs_create_link+0x61/0xc0 fs/sysfs/symlink.c:92 netdev_adjacent_sysfs_add net/core/dev.c:7481 [inline] __netdev_adjacent_dev_insert+0x751/0xb40 net/core/dev.c:7537 __netdev_adjacent_dev_link_lists net/core/dev.c:7619 [inline] __netdev_adjacent_dev_link_neighbour net/core/dev.c:7643 [inline] __netdev_upper_dev_link+0x410/0x840 net/core/dev.c:7703 netdev_upper_dev_link+0x92/0xc0 net/core/dev.c:7749 macsec_newlink+0x800/0x1a30 drivers/net/macsec.c:4087 rtnl_newlink_create net/core/rtnetlink.c:3485 [inline] __rtnl_newlink+0x1177/0x1940 net/core/rtnetlink.c:3705 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3718 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6444 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:728 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:751 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2539 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2593 __sys_sendmsg+0x117/0x1e0 net/socket.c:2622 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888143fdc1a0 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 8 bytes inside of allocated 12-byte region [ffff888143fdc1a0, ffff888143fdc1ac) The buggy address belongs to the physical page: page:ffffea00050ff700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x143fdc flags: 0x57ff00000000200(slab|node=1|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 057ff00000000200 ffff8880128413c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 10509138456, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x10a9/0x31e0 mm/page_alloc.c:3221 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4477 alloc_page_interleave+0x1e/0x250 mm/mempolicy.c:2131 alloc_pages+0x22a/0x270 mm/mempolicy.c:2293 alloc_slab_page mm/slub.c:1862 [inline] allocate_slab+0x24e/0x380 mm/slub.c:2009 new_slab mm/slub.c:2062 [inline] ___slab_alloc+0x8bc/0x1570 mm/slub.c:3215 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3314 __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3509 __do_kmalloc_node mm/slab_common.c:984 [inline] __kmalloc_node_track_caller+0x4d/0x100 mm/slab_common.c:1005 kstrdup+0x3c/0x70 mm/util.c:62 kstrdup_const+0x5f/0x70 mm/util.c:85 __kernfs_new_node+0x9c/0x8a0 fs/kernfs/dir.c:607 kernfs_new_node fs/kernfs/dir.c:675 [inline] kernfs_create_dir_ns+0x9a/0x210 fs/kernfs/dir.c:1036 sysfs_create_dir_ns+0x13b/0x2a0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:65 [inline] kobject_add_internal+0x2c8/0x990 lib/kobject.c:233 page_owner free stack trace missing Memory state around the buggy address: ffff888143fdc080: 00 04 fc fc fb fb fc fc fb fb fc fc fb fb fc fc ffff888143fdc100: 00 04 fc fc 00 04 fc fc 00 00 fc fc 00 00 fc fc >ffff888143fdc180: 00 00 fc fc 00 04 fc fc 00 07 fc fc 00 04 fc fc ^ ffff888143fdc200: 00 04 fc fc 00 04 fc fc 00 00 fc fc 00 00 fc fc ffff888143fdc280: fa fb fc fc fa fb fc fc 00 00 fc fc 00 07 fc fc ================================================================== --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup