From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f78.google.com (mail-oa1-f78.google.com [209.85.160.78]) (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 62AE93A1A35 for ; Wed, 19 Aug 2026 18:13:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787163205; cv=none; b=JUNImz0XBpt0D2V71OB8nTKwSDqqCR5WHH9R4ECt57ddDV2SCCZE0VqJDzAMsIcCTbW32fUkEsFbPZ1cEi8M8u+Cz565DwSvnogssdz8+0+3FdGG3hHJ7vYHeYZjQMJ3HPMfFpIevXKJD66ypABzlD4i3lbm7u1IKNENGdvO9aQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787163205; c=relaxed/simple; bh=Ji5H397BwBGkRAkfa8lTlH/IWCiJMDfKdIMIxNzLkU0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=j9sTtv/M306koHwaap6h6yQOu7InmQILgx1cAKYr8B60HJLiIvu4jt78c+a9OIU/0FU0AL2p4oRnsGQzwvbb1k5Js8/51VwTKfuaL+FxD3R6Bc6GOH3jcaeiUK2W5O1lzGOkHb/LO2MzaD3+doWNBBxTTgHyU6+5RSoVsCF8Iyw= 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=209.85.160.78 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-oa1-f78.google.com with SMTP id 586e51a60fabf-45eef45a188so1089624fac.1 for ; Wed, 19 Aug 2026 11:13:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787163203; x=1787768003; 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=K+f1tCSMRaXnCgmZu2zRG6KoqZkzFU6BmX21iDBy/BU=; b=VJxiruNc6WBC6rNbVCHhnOGn5B9w6mSVHMqykK87huBpjoBImNRTrHRQHR/6JK/L5f tI7mcb3r0gH4KfUfj3Yrop7BpVkODfnC9o0L0/dFmE4sn/U/K3Fw1BbVcAS05J+WeIWM WJUhF9XLceo8hN78IcOd/S2lmax7jBXWjTJCS5Cfpd63wPntVi7A0MuaFbFXezVn4gUx rSfecmHLtXtJa7p3I7kYvvyf7MSgpGSlg6t7s2owXq8wUTBX/CH9C+HK/zwjLisSKb9z kcRK9UHxvwTcFtJuBDdJrT1nphzF+1NwIdzKWJRNFyEJZzRhfD7WGBb3wXvKLSwUIn2d r/Mw== X-Gm-Message-State: AOJu0YxOQ0FvrTJMYZ8zU9WZGOPuc359Oe0Yw0gXjZQHRMAj+iPnSpEq RNdCL3S7wmnNr5QItEw8njA0ezzPl0fkD7ElRplIXlTi2jumn8bd3ivG8w5DiUOalH98tPCcaB9 sEk8H6J5AjPJcZfGY6N9zaUzfDeQ1iz9/JNgUqWG1MY17AgioH9TYDBaHnznhzA== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:7097:10b0:6b1:3da8:da1a with SMTP id 006d021491bc7-6b13da8f107mr4662848eaf.17.1787163202968; Wed, 19 Aug 2026 11:13:22 -0700 (PDT) Date: Wed, 19 Aug 2026 11:13:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a85f242.c8649fcc.3bb87.0014.GAE@google.com> Subject: [syzbot] [mmc?] WARNING in mmc_free_host From: syzbot To: linux-kernel@vger.kernel.org, linux-mmc@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: 8d3ae59288f1 Linux 7.2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1797d6c6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2ca5f2f2c4197664 dashboard link: https://syzkaller.appspot.com/bug?extid=82a0a7de6d84867d030e compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4dc2f356959b/disk-8d3ae592.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1a5c72c8e23c/vmlinux-8d3ae592.xz kernel image: https://storage.googleapis.com/syzbot-assets/bc814d980581/bzImage-8d3ae592.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+82a0a7de6d84867d030e@syzkaller.appspotmail.com ------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] do_wait+0x17d/0x510 kernel/exit.c:-1 WARNING: kernel/sched/core.c:9124 at __might_sleep+0x92/0xf0 kernel/sched/core.c:9120, CPU#0: syz-executor/16351 Modules linked in: CPU: 0 UID: 0 PID: 16351 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__might_sleep+0xac/0xf0 kernel/sched/core.c:9120 Code: 00 00 48 89 3c 24 41 89 f5 4c 8d 35 6e d3 c4 0e 43 80 3c 3c 00 74 08 48 89 df e8 bf 9b 9e 00 48 8b 0b 4c 89 f7 89 ee 48 89 ca <67> 48 0f b9 3a 44 89 ee 48 8b 3c 24 eb b5 44 89 f1 80 e1 07 80 c1 RSP: 0000:ffffc90000007c08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88802fe5b770 RCX: ffffffff81880fbd RDX: ffffffff81880fbd RSI: 0000000000000001 RDI: ffffffff905ae310 RBP: 0000000000000001 R08: ffffffff90578f37 R09: 1ffffffff20af1e6 R10: dffffc0000000000 R11: fffffbfff20af1e7 R12: 1ffff11005fcb6ee R13: 0000000000001187 R14: ffffffff905ae310 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888124f49000(0063) knlGS:000000005776e480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000003291fff8 CR3: 0000000055a7a000 CR4: 00000000003526f0 Call Trace: __cancel_work_sync+0x6d/0x110 kernel/workqueue.c:4487 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700 call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386 run_timer_base kernel/time/timer.c:2395 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405 handle_softirqs+0x225/0x840 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:do_raw_read_lock+0x4/0x90 kernel/locking/spinlock_debug.c:160 Code: 91 00 e9 e5 fe ff ff 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 <41> 56 53 48 89 fb 4c 8d 77 08 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 RSP: 0000:ffffc900067c7b80 EFLAGS: 00000286 RAX: 2cb575fa076c2400 RBX: ffffc900067c7c80 RCX: 0000000080000001 RDX: 00000000d89f7662 RSI: ffffffff8e4b1d72 RDI: ffffffff8e80a040 RBP: ffff88802fe5b770 R08: ffffffff8187fba9 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8e80a058 R12: dffffc0000000000 R13: 1ffff92000cf8f90 R14: ffffc900067c7cb0 R15: 0000000000000004 __do_wait+0xd9/0x720 kernel/exit.c:1712 do_wait+0x1e7/0x510 kernel/exit.c:1756 kernel_wait4+0x232/0x2b0 kernel/exit.c:1915 __do_compat_sys_wait4 kernel/exit.c:1973 [inline] __se_compat_sys_wait4 kernel/exit.c:1966 [inline] __ia32_compat_sys_wait4+0x165/0x230 kernel/exit.c:1966 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] do_int80_emulation+0x19a/0x550 arch/x86/entry/syscall_32.c:172 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:598 RIP: 0023:0xf71074eb Code: 57 56 53 8b 44 24 14 f6 00 08 75 23 8b 44 24 18 8b 5c 24 1c 8b 4c 24 20 8b 54 24 24 8b 74 24 28 8b 7c 24 2c 8b 6c 24 30 cd 80 <5b> 5e 5f 5d c3 5b 5e 5f 5d e9 f7 a1 ff ff 66 90 66 90 66 90 90 53 RSP: 002b:00000000f74efc6c EFLAGS: 00000246 ORIG_RAX: 0000000000000072 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00000000f74efe08 RDX: 0000000040000001 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 89 3c 24 mov %rdi,(%rsp) 6: 41 89 f5 mov %esi,%r13d 9: 4c 8d 35 6e d3 c4 0e lea 0xec4d36e(%rip),%r14 # 0xec4d37e 10: 43 80 3c 3c 00 cmpb $0x0,(%r12,%r15,1) 15: 74 08 je 0x1f 17: 48 89 df mov %rbx,%rdi 1a: e8 bf 9b 9e 00 call 0x9e9bde 1f: 48 8b 0b mov (%rbx),%rcx 22: 4c 89 f7 mov %r14,%rdi 25: 89 ee mov %ebp,%esi 27: 48 89 ca mov %rcx,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 44 89 ee mov %r13d,%esi 32: 48 8b 3c 24 mov (%rsp),%rdi 36: eb b5 jmp 0xffffffed 38: 44 89 f1 mov %r14d,%ecx 3b: 80 e1 07 and $0x7,%cl 3e: 80 .byte 0x80 3f: c1 .byte 0xc1 --- 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