From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.161.70 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792874547; b=on3NxNzkUF0KFf9VNLkbtlBMVwf1HqT4x21VccfAE4TglSjg0Y3WJGsHT4lBegUEIEWR rBNMot5lmuyazx/BWQKMvcfY5T5wCeprakNC7MYM2YcgVrSmB1HvKhWfgaN8CF3FcsTD7 rANnRdGzLmGM+m+RcI2qcGnawmDxlzjmVMpOg/J+w5GyOfwSegl9cfxckCnUjTHf5FUDu EP0IgKjZtLL1Le2pPR0oz2imgClJVkrgbe7x3FLCBxQdLR4RD2p4NjhlKH3xGhWIoqbaj qXOIPia72EnjREp55Mmqtx7Fl8nubo/q5p/E0DzqS4kqBsxgwW7XaC8MnegfloiZ+OA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792874547; h=DMARC-Filter:Received:X-Google-DKIM-Signature:X-Gm-Message-State: MIME-Version:X-Received:Date:X-Google-Appengine-App-Id: X-Google-Appengine-App-Id-Alias:Message-ID:Subject:From:To: Content-Type; bh=FqBdXGEsMuUTS0y0QM4UIXMu2Yp29adRdaRXwX7vNjE=; b=c3e12/mLzbFAZyAbu0iVqrMSKiIuMDRHw4TzQjJ+MldvDEMZM5FL4POAt79pQII7wxi1 gAViz7pjLJka6B3jUdD7hkiC3hDJojAHyE9YydyTmODJwjYwGoJ2rYNbx3uef0EaLO6sO aaADbYByzsbq3B1LERDVgOlmZnOwTwOE8Xw54BlIJl1S02T42Ct70t2bAhLbwgB/4EhyV xV9NpLI0514f6qkSdSqDK2shfPg9pP1Wf5EDJxzFwILPPIFoRFygjhDYTLD8QlC4g76fN XqVBfh3To8rPUjGLr9UjOXPMbkfKntGhOHVP0n4Aw7WP9lK5Mmj52pBIvEx/I+c3/mw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.remote-ip=209.85.161.70 Received: from mail-oo1-f70.google.com (mail-oo1-f70.google.com [209.85.161.70]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 838D1606A31D for ; Sat, 24 Oct 2026 20:42:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 838D1606A31D 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-oo1-f70.google.com with SMTP id 006d021491bc7-6e0063e7a02so2226650eaf.2 for ; Sat, 24 Oct 2026 13:42:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792874546; x=1793479346; 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=FqBdXGEsMuUTS0y0QM4UIXMu2Yp29adRdaRXwX7vNjE=; b=qX/PqYQWwUpqY66utqKhL2tBf7wjlUPN4JUhnCNYbah1DahN/O6FF7V0zX20HkcWwY dUKGth1gxIb6BpXqvN0sjJLYXa4cp4yFaw4aZ31rZjDcmtMaDu91/fzDeoWvlLcGirMf w/5zal5HZpoI+CHmj76gJgEFfPM48r3EbrfKqWkYVNXidewGzmTnjm3AyKGpNUxs9PR1 mYREPbQCtrLJcKngJOscdHn06j75jjnMjM3qMxyX+IXwXwtBDjX19mzsWIX6o7JwF2Cq lasZ22pfQGCuy9UIFwOTxjgjBHAAEkgFUTjizXZX4fHzmEL+me1vQoz4J5pyYP+RNW8t x0aQ== X-Gm-Message-State: AFq9FYJ1a+C4wEpDWDJWhcsRh8ovBBZiRjyxATQz2ep3bquDXwvgMbsX v5nM+jhUNvL0Vqti0049LIz4TVJLFgMO/Y32zfnrcQN3RtXQJAQnGDlIsj2kPcDD9ERrw3MUF/N jXJaIP4Xltx/nhgBUW3okF9HIxphoiL+RvfR4oKM8Q3tOu8TO5aKoZhkhhZA= X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-Received: by 2002:a05:6820:c0db:10b0:70a:849b:6ec6 with SMTP id 006d021491bc7-70ba0b62d74mr1000207eaf.6.1792874546529; Sat, 24 Oct 2026 13:42:26 -0700 (PDT) Date: Sat, 24 Oct 2026 13:42:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6add1832.a26421ad.3bb4f4.0013.GAE@google.com> Subject: [syzbot] [mmc?] BUG: sleeping function called from invalid context in vub300_inactivity_timer_expired From: syzbot To: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-usb@vger.kernel.org, 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: bdf12cde3083 usb: gadget: dummy_hcd: prevent unbind via sy.. 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=10f7c231580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7f0127eb11110629 dashboard link: https://syzkaller.appspot.com/bug?extid=13d431d857e347804708 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/85e12902fee8/disk-bdf12cde.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4a1ee2a067fd/vmlinux-bdf12cde.xz kernel image: https://storage.googleapis.com/syzbot-assets/2acb753f5754/bzImage-bdf12cde.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+13d431d857e347804708@syzkaller.appspotmail.com BUG: sleeping function called from invalid context at kernel/workqueue.c:4561 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 14894, name: dhcpcd-run-hook preempt_count: 100, expected: 0 RCU nest depth: 1, expected: 0 locks held by dhcpcd-run-hook/14894: 3, last CPU#0: #0: ffff888119da0340 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline] #0: ffff888119da0340 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_maybe_expand+0x1e2/0x3d0 mm/mmap.c:1691 #1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: mt_find+0x136/0x9b0 lib/maple_tree.c:6431 Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:486 [inline] [] handle_softirqs+0xf3/0x9b0 kernel/softirq.c:621 CPU: 0 UID: 0 PID: 14894 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 __might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9264 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0x168/0x210 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947 RSP: 0018:ffffc90014baf920 EFLAGS: 00000206 RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200 RDX: 0000000000000000 RSI: ffffffff892be127 RDI: ffffffff87d2bd80 RBP: ffffffff898e6f20 R08: 0000000032a4bc37 R09: 0000000000000007 R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] mt_find+0x14a/0x9b0 lib/maple_tree.c:6431 gup_vma_lookup+0x20/0x170 mm/gup.c:1275 __get_user_pages+0x241/0x2970 mm/gup.c:1396 __get_user_pages_locked mm/gup.c:1692 [inline] get_user_pages_remote+0x3d2/0xb10 mm/gup.c:2609 copy_strings.isra.0+0x475/0x790 fs/exec.c:511 do_execveat_common.isra.0+0x38f/0x580 fs/exec.c:1941 __do_sys_execve fs/exec.c:2038 [inline] __se_sys_execve fs/exec.c:2032 [inline] __x64_sys_execve+0x93/0xd0 fs/exec.c:2032 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 RIP: 0033:0x7f65da68e107 Code: 0f 00 64 c7 00 07 00 00 00 b8 ff ff ff ff c9 c3 0f 1f 00 48 8b 05 a9 ee 0f 00 48 8b 10 e9 01 00 00 00 90 b8 3b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 ec 0f 00 f7 d8 64 89 01 48 RSP: 002b:00007ffdc0ec44e8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RBP: 000055bee7e24ef8 R08: 00007ffdc0ec7f12 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 000055bee7e24e68 R13: 00007f65da853e8b R14: 000055bee7e24e68 R15: 0000000000000000 --- 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