From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f3.google.com (mail-oi2-f3.google.com [74.125.231.195]) (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 F30EE34EEFD for ; Fri, 18 Sep 2026 01:01:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.195 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789693302; cv=none; b=fyzh7NS3Bm0tkLvSfRI7I/U58xK1CdedQtpbC/BKBml5JORv83/ihdlXSMrEdQMopNR2cJ1NsFKEbmBzyJLlIEgUhnYrcogutGgnnB0rox2+p0xG0Rk2llgVfJRLISQEFm0sGZ6SUesdJWeP4/kmke6y909NBrMaYC9dqiqT2hM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789693302; c=relaxed/simple; bh=63t47ASy4Pqaw2rxcNVymf+q8JkG0Jgq8Egv5JlxqXs=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=O621y2ZcophneuDDKoj8EVRZay7j1zJBdjSUkEzC3DQgghd57vjqNJgUNPrCTE+aKdENHSzzMHTT83i6ZzWe1ABhrN4OPMmLxBM/ubG6G5jfY7EjrRBRHYjSUDi0biYzWp4BEmbzIWKTzDBaHwSOwkd+nLelUfU5V6gbFFVjxB4= 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=74.125.231.195 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-oi2-f3.google.com with SMTP id 5614622812f47-4b38a6e8c79so83637b6e.1 for ; Thu, 17 Sep 2026 18:01:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789693300; x=1790298100; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=hnmcEZw6N9pgwLjSmO5GPULj7Drde3nmSPgE8fUPnbQ=; b=c6HKNZrJjvsCq2GW+OKAcxz4/KBEGe3/xERr8vnYTCEoBIkAARCrOA9hPqGIzfH04I 4WquzdglHcfn5fgmmNqi+HIF87DeZKDevl4+51+BrJ3AxtxhbJISrZJmQj6no32pe65D IRvby1KO4hxvih+arXwQvrP8wx3Wuj6C2SGzpvZDE2fsUGW/0LpSeWR30ZDvT2eGPpG2 AJlWJLs/y3a5DRkVHW0Kjs6E32yt5vWPxjWkVPVpeOF4mPsi7YuUs92hv6gWRzr7zKpp NPLpYYWawNrm5WDUl+u5mSu86mEBMZabwkfMgjWiFsaPYrn1hhT9zh+XDqhx4WmSkTV0 0g/Q== X-Gm-Message-State: AFuF++m29sCUznS7IozrfdGEpmW7lZq/TEN0iYK+FcyXDnbibJmSzTm+ xKSBIKvB0QR+Ib7XBNC358ysDd4TJM2lkXzMUKBPojNuMXjJOYyWZylVTEZjmfZa7eUJoyBVApW yDTxkfUQrvpCAXT31+zcOiEizeWEOIXy0aKlSRb2i7rL/dzEm89Q3ILi5yMF6/Q== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:5392:b0:4c3:b6cb:da26 with SMTP id 5614622812f47-4ccf840c6dcmr1110640b6e.37.1789693299770; Thu, 17 Sep 2026 18:01:39 -0700 (PDT) Date: Thu, 17 Sep 2026 18:01:39 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aac8d73.87c06881.1db2b3.001e.GAE@google.com> Subject: [syzbot] [mmc?] [usb?] KASAN: slab-use-after-free Read in rtsx_usb_ms_handle_req From: syzbot To: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-usb@vger.kernel.org, maximlevitsky@gmail.com, oakad@yahoo.com, syzkaller-bugs@googlegroups.com, ulf.hansson@linaro.org, ulfh@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d58dffe9ee2c USB: core: amend usb_get_from_anchor() kernel.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=101538c9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c451f9f64434b622 dashboard link: https://syzkaller.appspot.com/bug?extid=3ee5da0319ca17ef1f4e compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10a39bf9580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/424c61cbb872/disk-d58dffe9.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4124586dc97c/vmlinux-d58dffe9.xz kernel image: https://storage.googleapis.com/syzbot-assets/a07e8e384dc4/bzImage-d58dffe9.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3ee5da0319ca17ef1f4e@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in rtsx_usb_ms_issue_cmd drivers/memstick/host/rtsx_usb_ms.c:486 [inline] BUG: KASAN: slab-use-after-free in rtsx_usb_ms_handle_req+0x17ff/0x1a00 drivers/memstick/host/rtsx_usb_ms.c:531 Read of size 1 at addr ffff888120c35071 by task kworker/1:0/24 CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events rtsx_usb_ms_handle_req Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 rtsx_usb_ms_issue_cmd drivers/memstick/host/rtsx_usb_ms.c:486 [inline] rtsx_usb_ms_handle_req+0x17ff/0x1a00 drivers/memstick/host/rtsx_usb_ms.c:531 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 12: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2d8/0x680 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] memstick_alloc_card drivers/memstick/core/memstick.c:383 [inline] memstick_check+0x2c1/0x10d0 drivers/memstick/core/memstick.c:452 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 12: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x43/0x70 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2748 [inline] slab_free mm/slub.c:6499 [inline] kfree+0x20c/0x650 mm/slub.c:6792 memstick_alloc_card drivers/memstick/core/memstick.c:420 [inline] memstick_check+0x72b/0x10d0 drivers/memstick/core/memstick.c:452 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888120c35000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 113 bytes inside of freed 2048-byte region [ffff888120c35000, ffff888120c35800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x120c30 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x200000000000040(head|node=0|zone=2) page_type: f5(slab) raw: 0200000000000040 ffff888100042000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000 head: 0200000000000040 ffff888100042000 dead000000000100 dead000000000122 head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000 head: 0200000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2865, tgid 2865 (udevd), ts 24097723903 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0xf4b/0x3440 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x2d7/0x2f70 mm/page_alloc.c:5436 alloc_slab_page mm/slub.c:3347 [inline] allocate_slab mm/slub.c:3462 [inline] new_slab+0xa9/0x6e0 mm/slub.c:3513 refill_objects+0xe3/0x410 mm/slub.c:7410 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __do_kmalloc_node mm/slub.c:5413 [inline] __kmalloc_node_track_caller_noprof+0x634/0x820 mm/slub.c:5545 kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637 __alloc_skb+0x185/0x710 net/core/skbuff.c:715 alloc_skb include/linux/skbuff.h:1384 [inline] netlink_alloc_large_skb+0x69/0x150 net/netlink/af_netlink.c:1185 netlink_sendmsg+0x680/0xda0 net/netlink/af_netlink.c:1875 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2713 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2767 __sys_sendmsg+0x160/0x210 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f page_owner free stack trace missing Memory state around the buggy address: ffff888120c34f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888120c34f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888120c35000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888120c35080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888120c35100: 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 report is already addressed, 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 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