From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-187.mta1.migadu.com (out-187.mta1.migadu.com [95.215.58.187]) (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 B40CD2063DF for ; Thu, 20 Mar 2025 08:41:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.187 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742460092; cv=none; b=kGdT/cFgfcj64qaYH2sBLxF4b5VC11PufBmUyW3iz4k3gMQ1ZHctQhZMUVhV3A2iphDgPPqrjDA3U07NlKnks/WVPSlPn+2pYoecoRssRppqdLC14Oa76cf2xd5xis+HRwBp/WccK2zPmbY0DIgYfODF33+rdGBLjArC3fcFDME= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742460092; c=relaxed/simple; bh=Xl0sN9nXKyD7XwlQ3LKCTHRWE2oPfn/jUJqZWIlcH54=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=Ax34MBlB4prFqHHDMa0redDVlKuhXMB4b2VeToxvNYZ6R76XU2NsFOQ5RWxEOhijsOo3zh27s3t2FfiEF0K19L3T0XyRQBekoVRjXkhkgkqPplobW5lWg9cboNCCNxHQa4vTapEaCtwz6rLU317egxZwcxvdPYCmwqaQf/BWoMI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Iz7Oyd/1; arc=none smtp.client-ip=95.215.58.187 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Iz7Oyd/1" Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1742460086; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zi1iaGlhfR+TaozLS52j8nqEXg7xPT6xox5yrHMs700=; b=Iz7Oyd/1BoO3jnxOu5a4VU/oU80VEa69kyjdz+fDWsaZOYsSJid6vUfpZIfqofRCpWLXjs MfOYBeRe9eyVJRSoMYCDpO+GHnnWaXC7GcdlNErLtJdiQU9TiCtJCKZDecCE1W/yj9tDHT O1HpJKx9AU1ZNZKltrGbA7FL+/C8rxE= Date: Thu, 20 Mar 2025 09:41:23 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [syzbot] [rdma?] KASAN: slab-use-after-free Read in ib_device_uevent (2) To: syzbot , jgg@ziepe.ca, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <67b25ec8.050a0220.54b41.000d.GAE@google.com> Content-Language: en-US X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Zhu Yanjun In-Reply-To: <67b25ec8.050a0220.54b41.000d.GAE@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT On 16.02.25 22:55, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of git://git.c.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=140563f8580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=641fe3e3cfee64bb > dashboard link: https://syzkaller.appspot.com/bug?extid=17fb1664c4f5a2eeb36f > 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/7feb34a89c2a/non_bootable_disk-09fbf3d5.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/31b409a4b675/vmlinux-09fbf3d5.xz > kernel image: https://storage.googleapis.com/syzbot-assets/27f349d4d8cb/bzImage-09fbf3d5.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+17fb1664c4f5a2eeb36f@syzkaller.appspotmail.com To this problem, I just looked through this problem which occurred on iwarp. I remember a similar problem which occurred on rxe. To the problem on rxe, the solution https://patchwork.kernel.org/project/linux-rdma/patch/20250313092421.944658-1-wangliang74@huawei.com/ seems to be able to fix it. I am not sure if this problem can also be fixed by the above solution or not. Best Regards, Zhu Yanjun > > ================================================================== > BUG: KASAN: slab-use-after-free in string_nocheck lib/vsprintf.c:632 [inline] > BUG: KASAN: slab-use-after-free in string+0x4a6/0x4f0 lib/vsprintf.c:714 > Read of size 1 at addr ffff88803e895ea0 by task udevd/6903 > > CPU: 1 UID: 0 PID: 6903 Comm: udevd Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #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:94 [inline] > dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 > print_address_description mm/kasan/report.c:378 [inline] > print_report+0xc3/0x620 mm/kasan/report.c:489 > kasan_report+0xd9/0x110 mm/kasan/report.c:602 > string_nocheck lib/vsprintf.c:632 [inline] > string+0x4a6/0x4f0 lib/vsprintf.c:714 > vsnprintf+0x4c8/0x1180 lib/vsprintf.c:2843 > add_uevent_var+0x17c/0x3a0 lib/kobject_uevent.c:679 > ib_device_uevent+0x4e/0xb0 drivers/infiniband/core/device.c:502 > dev_uevent+0x28b/0x770 drivers/base/core.c:2673 > uevent_show+0x1d8/0x3b0 drivers/base/core.c:2731 > dev_attr_show+0x53/0xe0 drivers/base/core.c:2423 > sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59 > seq_read_iter+0x4f4/0x12b0 fs/seq_file.c:230 > kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279 > new_sync_read fs/read_write.c:484 [inline] > vfs_read+0x886/0xbf0 fs/read_write.c:565 > ksys_read+0x12b/0x250 fs/read_write.c:708 > 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: 0033:0x7f7681378b6a > Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83 > RSP: 002b:00007ffcbdf9d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 > RAX: ffffffffffffffda RBX: 000055efbec7de20 RCX: 00007f7681378b6a > RDX: 0000000000001000 RSI: 000055efbeca9490 RDI: 0000000000000008 > RBP: 000055efbec7de20 R08: 0000000000000008 R09: 0000000000020000 > R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000 > R13: 0000000000003fff R14: 00007ffcbdf9d518 R15: 000000000000000a > > > Allocated by task 12483: > kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 > kasan_save_track+0x14/0x30 mm/kasan/common.c:68 > poison_kmalloc_redzone mm/kasan/common.c:377 [inline] > __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 > kasan_kmalloc include/linux/kasan.h:260 [inline] > __do_kmalloc_node mm/slub.c:4294 [inline] > __kmalloc_node_track_caller_noprof+0x222/0x510 mm/slub.c:4313 > __kmemdup_nul mm/util.c:61 [inline] > kstrdup+0x53/0x100 mm/util.c:81 > kstrdup_const+0x63/0x80 mm/util.c:101 > kvasprintf_const+0x164/0x1a0 lib/kasprintf.c:46 > kobject_set_name_vargs+0x5a/0x140 lib/kobject.c:274 > dev_set_name+0xc8/0x100 drivers/base/core.c:3468 > assign_name drivers/infiniband/core/device.c:1202 [inline] > ib_register_device+0x7e0/0xdf0 drivers/infiniband/core/device.c:1384 > siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] > siw_newlink drivers/infiniband/sw/siw/siw_main.c:431 [inline] > siw_newlink+0xb60/0xd70 drivers/infiniband/sw/siw/siw_main.c:413 > nldev_newlink+0x38e/0x660 drivers/infiniband/core/nldev.c:1795 > rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195 > rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239 > netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] > netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348 > netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892 > sock_sendmsg_nosec net/socket.c:718 [inline] > __sock_sendmsg net/socket.c:733 [inline] > ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573 > ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627 > __sys_sendmsg+0x16e/0x220 net/socket.c:2659 > 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 12485: > 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:576 > poison_slab_object mm/kasan/common.c:247 [inline] > __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 > kasan_slab_free include/linux/kasan.h:233 [inline] > slab_free_hook mm/slub.c:2353 [inline] > slab_free mm/slub.c:4609 [inline] > kfree+0x2c4/0x4d0 mm/slub.c:4757 > kfree_const+0x55/0x60 mm/util.c:43 > kobject_rename+0x179/0x260 lib/kobject.c:524 > device_rename+0x130/0x230 drivers/base/core.c:4525 > ib_device_rename+0x114/0x5c0 drivers/infiniband/core/device.c:402 > nldev_set_doit+0x3be/0x4c0 drivers/infiniband/core/nldev.c:1146 > rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195 > rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239 > netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] > netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348 > netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892 > sock_sendmsg_nosec net/socket.c:718 [inline] > __sock_sendmsg net/socket.c:733 [inline] > ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573 > ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627 > __sys_sendmsg+0x16e/0x220 net/socket.c:2659 > 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 ffff88803e895ea0 > which belongs to the cache kmalloc-8 of size 8 > The buggy address is located 0 bytes inside of > freed 8-byte region [ffff88803e895ea0, ffff88803e895ea8) > > The buggy address belongs to the physical page: > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3e895 > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) > page_type: f5(slab) > raw: 00fff00000000000 ffff88801b042500 ffffea0000a05a00 dead000000000002 > raw: 0000000000000000 0000000000800080 00000000f5000000 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 11986, tgid 11985 (syz.1.1513), ts 150711065425, free_ts 150704805794 > set_page_owner include/linux/page_owner.h:32 [inline] > post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551 > prep_new_page mm/page_alloc.c:1559 [inline] > get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477 > __alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4739 > alloc_pages_mpol+0x1fc/0x540 mm/mempolicy.c:2270 > alloc_slab_page mm/slub.c:2423 [inline] > allocate_slab mm/slub.c:2587 [inline] > new_slab+0x23d/0x330 mm/slub.c:2640 > ___slab_alloc+0xc5d/0x1720 mm/slub.c:3826 > __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916 > __slab_alloc_node mm/slub.c:3991 [inline] > slab_alloc_node mm/slub.c:4152 [inline] > __do_kmalloc_node mm/slub.c:4293 [inline] > __kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300 > __kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:662 > kvmalloc_array_node_noprof include/linux/slab.h:1063 [inline] > __ptr_ring_init_queue_alloc_noprof include/linux/ptr_ring.h:471 [inline] > ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:634 [inline] > skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208 [inline] > pfifo_fast_change_tx_queue_len+0x157/0xbb0 net/sched/sch_generic.c:909 > qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline] > dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457 > dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362 > dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608 > dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826 > sock_do_ioctl+0x19e/0x280 net/socket.c:1213 > sock_ioctl+0x228/0x6c0 net/socket.c:1318 > page last free pid 11986 tgid 11985 stack trace: > reset_page_owner include/linux/page_owner.h:25 [inline] > free_pages_prepare mm/page_alloc.c:1127 [inline] > free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660 > __put_partials+0x14c/0x170 mm/slub.c:3153 > qlink_free mm/kasan/quarantine.c:163 [inline] > qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 > kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 > __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 > kasan_slab_alloc include/linux/kasan.h:250 [inline] > slab_post_alloc_hook mm/slub.c:4115 [inline] > slab_alloc_node mm/slub.c:4164 [inline] > __kmalloc_cache_noprof+0x243/0x410 mm/slub.c:4320 > kmalloc_noprof include/linux/slab.h:901 [inline] > kmalloc_array_noprof include/linux/slab.h:945 [inline] > ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:629 [inline] > skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208 [inline] > pfifo_fast_change_tx_queue_len+0xe1/0xbb0 net/sched/sch_generic.c:909 > qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline] > dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457 > dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362 > dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608 > dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826 > sock_do_ioctl+0x19e/0x280 net/socket.c:1213 > sock_ioctl+0x228/0x6c0 net/socket.c:1318 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:906 [inline] > __se_sys_ioctl fs/ioctl.c:892 [inline] > __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892 > 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 > > Memory state around the buggy address: > ffff88803e895d80: 05 fc fc fc fa fc fc fc 05 fc fc fc fa fc fc fc > ffff88803e895e00: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc >> ffff88803e895e80: 05 fc fc fc fa fc fc fc 05 fc fc fc 00 fc fc fc > ^ > ffff88803e895f00: 05 fc fc fc 05 fc fc fc 05 fc fc fc fa fc fc fc > ffff88803e895f80: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa 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 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