From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 EB44014EC7F for ; Wed, 24 Jul 2024 08:59:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721811562; cv=none; b=cpnI7K5bDAwOGEoKFbDv9w8fg6mjfEDaWxdHb421JNwE1IP/4No99v9QmVH1TbaTnIDf60MyDpbN4gvZWa+mBJWLhz9Vk0xK8cKWMupF49NqvOyZKhkcFB4jI6kl38/+xVg8VTjOtVfxL5NAo0ht+N0XdFuUvgLysiQ2nufOVWA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721811562; c=relaxed/simple; bh=GLVAF4ULstnW84fgSz/a5YmLZn8B2hFhVEbftkKjmLY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=CYyLxkaDytqfKra/+GfxK0Hy4LHiWQJ0sbl3+tJHj7DQIn9TSBIu2h+OZqy20eswJxxLVcjBdS9UkSgjmPpMLGnV6bsif4s6JCfpaFccVUkD37Ty+vTD4pE7sIbK2DP/pbap4G5fFHRQ7MWlMj51el98+uWLrVmP4/XlkvsYv+w= 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=209.85.166.71 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-f71.google.com with SMTP id ca18e2360f4ac-8179585c68cso1101297139f.2 for ; Wed, 24 Jul 2024 01:59:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721811560; x=1722416360; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=t1Fhw1S5C/O8PQznzsd5xFoGs3e7zPVK3lIN9xy59Gg=; b=DNW+x+JI5fN14F0a+w9qtZr0aSd13LV+hKzwbLVy4ZOONjE/inoz3/oLPs9vSyhc22 vqB65aPMtUYZn5d6RnqXAmR8EhjB65eZz204umAaPo4C9C8Eq1ahYsSAR7cYvCVcLSrN zYAtotXBtFp+ggRAuBshuhgibYkbKFrHHsSU7JbKHSIVsrI+WTaJLHZKLz/mT1jx7Jrt WvPuOM7WN9C5EWafR+SGvr2dKuyLVIFpAhEkoq+YwOIirDdcU0MwVPpDcPBtVNX987tH 4/BW23i1K6/DptfLwepCFSpJsVJcoOwKi/6z3hpE1jKHMAWdLzw34/zQa1AUxvp14pLZ UUcQ== X-Forwarded-Encrypted: i=1; AJvYcCV4ec3ReoJXsLV7EsSQfkFsHVGc2S0s5nOhcQAD/BPpcuJdFBZNxDXj2EZ7InR+7N/qZu7wAjlLUcrslvBJM1So7UhKXhYJEVh+Km1c X-Gm-Message-State: AOJu0YwILYR6xaZNPiD8aj1jINl2B4jjllXE9IfNtOsvuq3xc2SHp2/e 2cXmO2KneEnf+aiDl82w/We/68YgiuCmV1g0FTvX5B07D0gNYdD/aicTwdUUrw2kxvgBvttyyYY 7A/s7UXTOus+DX8ArYxqaAkN1/hIlcY8nOG9xZBEfT/VVb9UNQ45Q2xw= X-Google-Smtp-Source: AGHT+IGS95Of6P/5SNVM7r/fixVYTKcZ0WZU0y3HY5v/j+f/3C8HApgdJ72qGOjIYs4vAegOfPuSfiOXh+BSgKA6ekJ7DFVu2Isk Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8412:b0:4c1:4388:46bb with SMTP id 8926c6da1cb9f-4c289e08bd8mr160215173.0.1721811560133; Wed, 24 Jul 2024 01:59:20 -0700 (PDT) Date: Wed, 24 Jul 2024 01:59:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000069859c061dfa7e91@google.com> Subject: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in mgmt_remove_adv_monitor_sync From: syzbot To: johan.hedberg@gmail.com, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d7e78951a8b8 Merge tag 'net-6.11-rc0' of git://git.kernel... git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=126a9fc3980000 kernel config: https://syzkaller.appspot.com/x/.config?x=8d1cf7c29e32ce12 dashboard link: https://syzkaller.appspot.com/bug?extid=479aff51bb361ef5aa18 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/3c208b51873e/disk-d7e78951.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/adec146cf41c/vmlinux-d7e78951.xz kernel image: https://storage.googleapis.com/syzbot-assets/52f09b8f7356/bzImage-d7e78951.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+479aff51bb361ef5aa18@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in mgmt_remove_adv_monitor_sync+0x3a/0xd0 net/bluetooth/mgmt.c:5444 Read of size 8 at addr ffff88802aac0f18 by task kworker/u9:0/54 CPU: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.10.0-syzkaller-09703-gd7e78951a8b8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: hci0 hci_cmd_sync_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 mgmt_remove_adv_monitor_sync+0x3a/0xd0 net/bluetooth/mgmt.c:5444 hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:328 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 7112: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4180 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] mgmt_pending_new+0x65/0x250 net/bluetooth/mgmt_util.c:269 mgmt_pending_add+0x36/0x120 net/bluetooth/mgmt_util.c:296 remove_adv_monitor+0x102/0x1b0 net/bluetooth/mgmt.c:5469 hci_mgmt_cmd+0xc47/0x11d0 net/bluetooth/hci_sock.c:1712 hci_sock_sendmsg+0x7b8/0x11c0 net/bluetooth/hci_sock.c:1832 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 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 Freed by task 7179: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2235 [inline] slab_free mm/slub.c:4464 [inline] kfree+0x149/0x360 mm/slub.c:4585 mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259 __mgmt_power_off+0x187/0x420 net/bluetooth/mgmt.c:9458 hci_dev_close_sync+0x665/0x11a0 net/bluetooth/hci_sync.c:5118 hci_dev_do_close net/bluetooth/hci_core.c:490 [inline] hci_dev_close+0x112/0x210 net/bluetooth/hci_core.c:515 sock_do_ioctl+0x158/0x460 net/socket.c:1222 sock_ioctl+0x629/0x8e0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 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 The buggy address belongs to the object at ffff88802aac0f00 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 24 bytes inside of freed 96-byte region [ffff88802aac0f00, ffff88802aac0f60) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802aac0b80 pfn:0x2aac0 flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000200 ffff888015041280 ffffea00007c85d0 ffffea0001a17590 raw: ffff88802aac0b80 000000000020000a 00000001ffffefff 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 0x352800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 5330, tgid 5329 (syz.3.37), ts 87033405855, free_ts 86894920419 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473 prep_new_page mm/page_alloc.c:1481 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425 __alloc_pages_noprof+0x256/0x6c0 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+0x5f/0x120 mm/slub.c:2304 allocate_slab+0x5a/0x2f0 mm/slub.c:2467 new_slab mm/slub.c:2520 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3706 __slab_alloc+0x58/0xa0 mm/slub.c:3796 __slab_alloc_node mm/slub.c:3849 [inline] slab_alloc_node mm/slub.c:4016 [inline] __do_kmalloc_node mm/slub.c:4148 [inline] __kmalloc_node_noprof+0x286/0x440 mm/slub.c:4155 kmalloc_array_node_noprof include/linux/slab.h:788 [inline] alloc_slab_obj_exts mm/slub.c:1959 [inline] account_slab mm/slub.c:2430 [inline] allocate_slab+0xb6/0x2f0 mm/slub.c:2485 new_slab mm/slub.c:2520 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3706 __slab_alloc+0x58/0xa0 mm/slub.c:3796 __slab_alloc_node mm/slub.c:3849 [inline] slab_alloc_node mm/slub.c:4016 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4035 sk_prot_alloc+0x58/0x210 net/core/sock.c:2090 sk_alloc+0x38/0x370 net/core/sock.c:2149 inet_create+0x652/0xe70 net/ipv4/af_inet.c:326 __sock_create+0x490/0x920 net/socket.c:1571 page last free pid 5318 tgid 5318 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1093 [inline] free_unref_folios+0xf23/0x19e0 mm/page_alloc.c:2637 folios_put_refs+0x93a/0xa60 mm/swap.c:1024 free_pages_and_swap_cache+0x5c8/0x690 mm/swap_state.c:332 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465 exit_mmap+0x44f/0xc80 mm/mmap.c:3354 __mmput+0x115/0x390 kernel/fork.c:1343 exit_mm+0x220/0x310 kernel/exit.c:566 do_exit+0x9b2/0x27f0 kernel/exit.c:864 do_group_exit+0x207/0x2c0 kernel/exit.c:1026 __do_sys_exit_group kernel/exit.c:1037 [inline] __se_sys_exit_group kernel/exit.c:1035 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1035 x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232 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 Memory state around the buggy address: ffff88802aac0e00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88802aac0e80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff88802aac0f00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff88802aac0f80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88802aac1000: 04 fc fc fc 04 fc fc fc 04 fc fc fc 04 fc fc fc ================================================================== --- This report is generated by a bot. 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