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[2620:137:e000::1:20]) by mx.google.com with ESMTP id m2-20020a637d42000000b005306facab05si11027261pgn.120.2023.05.15.05.49.09; Mon, 15 May 2023 05:49:37 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-bluetooth-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-bluetooth-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-bluetooth-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241863AbjEOMrm (ORCPT + 99 others); Mon, 15 May 2023 08:47:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234222AbjEOMrl (ORCPT ); Mon, 15 May 2023 08:47:41 -0400 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0301BE44 for ; Mon, 15 May 2023 05:47:39 -0700 (PDT) Received: by mail-il1-f205.google.com with SMTP id e9e14a558f8ab-331632be774so447531965ab.0 for ; Mon, 15 May 2023 05:47:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684154858; x=1686746858; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=UzjPHYy1YH2B69CAuHHkDfM5nL26LpeVqCg+aXZtonM=; b=PakLGPSAKC0zt5UyxFPV6w9cT/NcyeWRZerSPr3CBn3mQHetsZnUOCSEIQmZFrFNv6 ZYLAPUgqce34vOKUojJri5vbvuqMYAIGwHEzImrnWxOGJ5RALfPdKuSgpJZ2Pkm+lqlh P++hnLgomEwjnbMDu3NCn+Jkfg6OToiTDFBFXLZV/5COP0lO6wdVG4t5vm3z7AETpWoW 7mtnshbF0avLKV5rfSCOHqkfgbC3BsRx1NZqQPOZdwF6Da+/JhfhEfAMR8kBomHzPZEl CclCG9YF9BKOnSCWuHje75aooW9TsLiy6t8PjpY1XHcT/8uPQTQLhUxQmgHc8bKnPfv3 SGWQ== X-Gm-Message-State: AC+VfDyvztD7HLyKM11N4Q0EguUZMRU9vpqYJxZVxCycYJ/pzxhQrNbG 2/ERRSmy7L5jortK/BQXAEeaVjI30fDXLaQsZh9Epghb3zB1 MIME-Version: 1.0 X-Received: by 2002:a05:6602:2d16:b0:763:b184:fe92 with SMTP id c22-20020a0566022d1600b00763b184fe92mr20328026iow.0.1684154858319; Mon, 15 May 2023 05:47:38 -0700 (PDT) Date: Mon, 15 May 2023 05:47:38 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000013b93805fbbadc50@google.com> Subject: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_chan_del From: syzbot To: davem@davemloft.net, edumazet@google.com, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2, SORTED_RECIPS,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: ed23734c23d2 Merge tag 'net-6.4-rc1' of git://git.kernel.o.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=16b2a3f4280000 kernel config: https://syzkaller.appspot.com/x/.config?x=87f9126139666d37 dashboard link: https://syzkaller.appspot.com/bug?extid=cf54c1da6574b6c1b049 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/c43e1732e675/disk-ed23734c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8f4e7bce7a91/vmlinux-ed23734c.xz kernel image: https://storage.googleapis.com/syzbot-assets/9fe83b099e40/bzImage-ed23734c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cf54c1da6574b6c1b049@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:575 [inline] BUG: KASAN: slab-use-after-free in hci_conn_drop include/net/bluetooth/hci_core.h:1418 [inline] BUG: KASAN: slab-use-after-free in sco_chan_del+0x102/0x4f0 net/bluetooth/sco.c:169 Write of size 4 at addr ffff88804dbea010 by task syz-executor.0/7018 CPU: 0 PID: 7018 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller-13379-ged23734c23d2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 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 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:187 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:575 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1418 [inline] sco_chan_del+0x102/0x4f0 net/bluetooth/sco.c:169 __sco_sock_close+0x178/0x740 net/bluetooth/sco.c:454 sco_sock_close net/bluetooth/sco.c:469 [inline] sco_sock_release+0x81/0x360 net/bluetooth/sco.c:1267 __sock_release+0xcd/0x290 net/socket.c:653 sock_close+0x1c/0x20 net/socket.c:1397 __fput+0x27c/0xa90 fs/file_table.c:321 task_work_run+0x16f/0x270 kernel/task_work.c:179 get_signal+0x1c7/0x25b0 kernel/signal.c:2650 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7a97a8c169 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:00007f7a965fe168 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: fffffffffffffffc RBX: 00007f7a97babf80 RCX: 00007f7a97a8c169 RDX: 0000000000000008 RSI: 0000000020002ec0 RDI: 0000000000000004 RBP: 00007f7a97ae7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca219560f R14: 00007f7a965fe300 R15: 0000000000022000 Allocated by task 7018: 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 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] hci_conn_add+0xb8/0x16b0 net/bluetooth/hci_conn.c:986 hci_connect_sco+0x3c7/0x1050 net/bluetooth/hci_conn.c:1663 sco_connect net/bluetooth/sco.c:264 [inline] sco_sock_connect+0x2d7/0xae0 net/bluetooth/sco.c:610 __sys_connect_file+0x153/0x1a0 net/socket.c:2003 __sys_connect+0x165/0x1a0 net/socket.c:2020 __do_sys_connect net/socket.c:2030 [inline] __se_sys_connect net/socket.c:2027 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:2027 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 Freed by task 5708: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799 device_release+0xa3/0x240 drivers/base/core.c:2484 kobject_cleanup lib/kobject.c:683 [inline] kobject_release lib/kobject.c:714 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c2/0x4d0 lib/kobject.c:731 put_device+0x1f/0x30 drivers/base/core.c:3733 hci_conn_del+0x1e5/0x950 net/bluetooth/hci_conn.c:1162 hci_conn_unlink+0x2ce/0x460 net/bluetooth/hci_conn.c:1109 hci_conn_unlink+0x362/0x460 net/bluetooth/hci_conn.c:1087 hci_conn_hash_flush+0x19b/0x270 net/bluetooth/hci_conn.c:2479 hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4941 hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554 hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2703 vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:669 __fput+0x27c/0xa90 fs/file_table.c:321 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xad3/0x2960 kernel/exit.c:871 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021 __do_sys_exit_group kernel/exit.c:1032 [inline] __se_sys_exit_group kernel/exit.c:1030 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030 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 The buggy address belongs to the object at ffff88804dbea000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 16 bytes inside of freed 4096-byte region [ffff88804dbea000, ffff88804dbeb000) The buggy address belongs to the physical page: page:ffffea000136fa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4dbe8 head:ffffea000136fa00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012442140 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4456, tgid 4456 (udevd), ts 192360753903, free_ts 185030986834 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 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] uevent_show+0x15d/0x380 drivers/base/core.c:2641 dev_attr_show+0x4f/0xd0 drivers/base/core.c:2349 sysfs_kf_seq_show+0x21d/0x430 fs/sysfs/file.c:59 seq_read_iter+0x4f9/0x12d0 fs/seq_file.c:230 kernfs_fop_read_iter+0x4ce/0x690 fs/kernfs/file.c:279 call_read_iter include/linux/fs.h:1862 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x4b1/0x8a0 fs/read_write.c:470 ksys_read+0x12b/0x250 fs/read_write.c:613 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 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2636 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3451 [inline] __kmem_cache_alloc_node+0x17c/0x320 mm/slub.c:3490 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] is_state_visited kernel/bpf/verifier.c:15459 [inline] do_check kernel/bpf/verifier.c:15629 [inline] do_check_common+0x2845/0xc620 kernel/bpf/verifier.c:18215 do_check_main kernel/bpf/verifier.c:18278 [inline] bpf_check+0x74aa/0xb010 kernel/bpf/verifier.c:18899 bpf_prog_load+0x16d3/0x21f0 kernel/bpf/syscall.c:2648 __sys_bpf+0x149f/0x5420 kernel/bpf/syscall.c:5058 __do_sys_bpf kernel/bpf/syscall.c:5162 [inline] __se_sys_bpf kernel/bpf/syscall.c:5160 [inline] __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5160 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 Memory state around the buggy address: ffff88804dbe9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804dbe9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804dbea000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804dbea080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804dbea100: 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 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