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 3A3C2137E for ; Wed, 5 Jul 2023 07:15:56 +0000 (UTC) Received: from mail-pg1-f208.google.com (mail-pg1-f208.google.com [209.85.215.208]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 350B0197 for ; Wed, 5 Jul 2023 00:15:54 -0700 (PDT) Received: by mail-pg1-f208.google.com with SMTP id 41be03b00d2f7-55b2ab496ecso6111978a12.2 for ; Wed, 05 Jul 2023 00:15:54 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688541353; x=1691133353; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=WZ7+sWnWvrizFrJ5QFtNubkqy+1tbYZw1UlsRJ+947o=; b=OiFCqb0/VK0DwY43FFQ0AWd6PDQLqbVJsehZnsqs0xWy8GWTC2x0lzUrrHYsWfGX+E q0Qg3dCutKCTvirWP11W9al9cvMmEq/5nU8Ailz2G/QS1gVz376D6D77qA2zPgOv3dGQ 5li420r6bHh5a+TtRUuGHD5OMJO3kIeYXW/SJGwZiAvhFfYEXTFf96V8kcXJXkRWRktg 1uoW28Jtd8xBiQIfk93m6rpCkcorPZECf0Rn56yK4qQxXgA4H/3Z6Z8sojqgwchmmi2L xtc5nUmJLVYYRQlighRbzDR1or3rYRiQlYfKEVEtdLlfitwQUArPcGo1T9DFQnQwwPzP oCaA== X-Gm-Message-State: ABy/qLZCIfPQ8E+RnFFpSyU9Vf0z3NB+WJut4dEBUlwE216nFwiLb8Ww EC2283rHmrs2Y79Znbu3jTaBbLuOGtJ7vhzdutE/ARC8g1Q9 X-Google-Smtp-Source: APBJJlG31Dw+a4umbG/+PdjzfaV9vilsIQIsWOwB6cDTifYUWydZ4Ae2fqcIbJI1YPzq9R8fSOfTVptVOjQ8Ttz71V+LYne1cgMu Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a63:4b0c:0:b0:553:8668:dc40 with SMTP id y12-20020a634b0c000000b005538668dc40mr8770642pga.6.1688541353764; Wed, 05 Jul 2023 00:15:53 -0700 (PDT) Date: Wed, 05 Jul 2023 00:15:53 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000946c5905ffb82b43@google.com> Subject: [syzbot] [net?] KASAN: slab-out-of-bounds Read in xfrm_state_walk From: syzbot To: davem@davemloft.net, edumazet@google.com, herbert@gondor.apana.org.au, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, steffen.klassert@secunet.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SORTED_RECIPS,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED 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: 3674fbf0451d Merge git://git.kernel.org/pub/scm/linux/kern.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=1638c0c8a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=c9bf1936936ca698 dashboard link: https://syzkaller.appspot.com/bug?extid=3dc23bd4c9d524e84ecf compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/42ed556782c3/disk-3674fbf0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1913e16e8565/vmlinux-3674fbf0.xz kernel image: https://storage.googleapis.com/syzbot-assets/469804b58a7c/bzImage-3674fbf0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3dc23bd4c9d524e84ecf@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in memcmp+0x1b6/0x1c0 lib/string.c:681 Read of size 8 at addr ffff888077e4fd20 by task syz-executor.1/8730 CPU: 1 PID: 8730 Comm: syz-executor.1 Not tainted 6.4.0-rc7-syzkaller-01944-g3674fbf0451d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 memcmp+0x1b6/0x1c0 lib/string.c:681 memcmp include/linux/fortify-string.h:665 [inline] addr_match include/net/xfrm.h:841 [inline] __xfrm_state_filter_match net/xfrm/xfrm_state.c:2279 [inline] xfrm_state_walk+0x387/0xad0 net/xfrm/xfrm_state.c:2307 xfrm_dump_sa+0x33d/0x4c0 net/xfrm/xfrm_user.c:1279 netlink_dump+0x570/0xc50 net/netlink/af_netlink.c:2269 __netlink_dump_start+0x6c0/0x9b0 net/netlink/af_netlink.c:2376 netlink_dump_start include/linux/netlink.h:330 [inline] xfrm_user_rcv_msg+0x853/0xa50 net/xfrm/xfrm_user.c:3135 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2549 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:3172 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x733/0x920 net/socket.c:2493 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2547 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2576 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f90b1c8c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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:00007f90b07fe168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f90b1dabf80 RCX: 00007f90b1c8c389 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007f90b1cd7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffb5f563bf R14: 00007f90b07fe300 R15: 0000000000022000 Allocated by task 8730: kasan_save_stack+0x22/0x40 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 mm/kasan/common.c:333 [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:966 [inline] __kmalloc_node_track_caller+0x5f/0x1a0 mm/slab_common.c:986 kmemdup+0x2c/0x60 mm/util.c:131 kmemdup include/linux/fortify-string.h:702 [inline] xfrm_dump_sa+0x28a/0x4c0 net/xfrm/xfrm_user.c:1266 netlink_dump+0x570/0xc50 net/netlink/af_netlink.c:2269 __netlink_dump_start+0x6c0/0x9b0 net/netlink/af_netlink.c:2376 netlink_dump_start include/linux/netlink.h:330 [inline] xfrm_user_rcv_msg+0x853/0xa50 net/xfrm/xfrm_user.c:3135 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2549 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:3172 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x733/0x920 net/socket.c:2493 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2547 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2576 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491 kvfree_call_rcu+0x70/0xad0 kernel/rcu/tree.c:3332 ip6addrlbl_net_exit+0xb1/0x180 net/ipv6/addrlabel.c:347 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Second to last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491 kvfree_call_rcu+0x70/0xad0 kernel/rcu/tree.c:3332 ip6addrlbl_net_exit+0xb1/0x180 net/ipv6/addrlabel.c:347 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888077e4fd00 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 32 bytes inside of allocated 36-byte region [ffff888077e4fd00, ffff888077e4fd24) The buggy address belongs to the physical page: page:ffffea0001df93c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x77e4f anon flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000200 ffff888012441640 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080200020 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 0x112820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 56, tgid 56 (kworker/u4:4), ts 309757851470, free_ts 309399709292 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] batadv_tvlv_realloc_packet_buff net/batman-adv/tvlv.c:283 [inline] batadv_tvlv_container_ogm_append+0x13a/0x4d0 net/batman-adv/tvlv.c:324 batadv_iv_ogm_schedule_buff+0x11aa/0x1520 net/batman-adv/bat_iv_ogm.c:812 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x333/0x960 net/batman-adv/bat_iv_ogm.c:1712 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564 free_unref_page+0x33/0x370 mm/page_alloc.c:2659 bpf_ringbuf_free kernel/bpf/ringbuf.c:227 [inline] ringbuf_map_free+0xd7/0x130 kernel/bpf/ringbuf.c:236 bpf_map_free_deferred+0x192/0x3e0 kernel/bpf/syscall.c:698 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff888077e4fc00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff888077e4fc80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc >ffff888077e4fd00: 00 00 00 00 04 fc fc fc fc fc fc fc fc fc fc fc ^ ffff888077e4fd80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ffff888077e4fe00: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc 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. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change 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