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[23.128.96.18]) by mx.google.com with ESMTP id q10si1255686ilo.6.2021.03.04.21.06.52; Thu, 04 Mar 2021 21:07:05 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=btxQoDBY; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229517AbhCEFGe (ORCPT + 99 others); Fri, 5 Mar 2021 00:06:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229465AbhCEFGd (ORCPT ); Fri, 5 Mar 2021 00:06:33 -0500 Received: from mail-lj1-x22d.google.com (mail-lj1-x22d.google.com [IPv6:2a00:1450:4864:20::22d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D9EDC061574; Thu, 4 Mar 2021 21:06:33 -0800 (PST) Received: by mail-lj1-x22d.google.com with SMTP id u4so1199211ljh.6; Thu, 04 Mar 2021 21:06:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=dvv4d17v0wrR1rzGcjfj08i43oOgXa86g/87JIiyQeg=; b=btxQoDBYRV7tvJzdxbrtQcgMR4/xu2Aqn0/vBIdEy3yu1meaK/ykwSVYpK4VwqAdmG Vc3ASsZK9zc2zhrQ4WA04RZVkH1cHtDx2H2NAijG/NTcRA7tVr0d8dXpET7VoDsrllkg MAPCITTmzh+2+ddicVgFxLSJGetlQiiFg2xzRLCtIdmqZyUNMTZznBcpIU5a70cHxhxr aavy0oc4WjLI7TRlbX5p2jiHhb6u1fJXatgoQ2SaxUv9wHaUCe38hK3gGroM0kWXnKNz AqWdhwrCuO6m2eZfIW8vvyva6n1d/w9dG/jaN1u7M6mbaO3gpIb31nJKE7RynutdVLN8 LVnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=dvv4d17v0wrR1rzGcjfj08i43oOgXa86g/87JIiyQeg=; b=dXQN+lPfjY3ynwym9FHlQP/Rp7EYS4g52D3uBQJx8wI84jA04L24BWp/ZioiVQwj0b XWmxPyUOyevHYxrtyBkZxCZp0stBOHorY3+ul31nABLRm83l1ymS/Az3nsOHRaYIxjM9 nJum8CAiyVViPMWEZW/vamA1mlwergv5P7jC9fZPjqrO6qwKOjuHF4hJ8yMIl8o4Dgb/ MDr+YOaWjkvW9IgRg/gXmW8IluGf1jxFLk9Rp8/SEDwUEABOanMszFLInHH0XETkhD60 Y8HURuiJy1HAz2WRNE3qcNV0gM25nnqJDUvIFtLGEAR6SNZT7t4NDJVi1HnMgUSJpozW 8gZA== X-Gm-Message-State: AOAM533spUG7JjcIHvb3IR4gu3nv2VR4h1EFOeNQw1suh9fWHbGE/fJ+ t0AErsibF7V9RViUspL29IZofNo5Yo1rDR/FYEhXICI63N9IEA== X-Received: by 2002:a2e:9195:: with SMTP id f21mr4095339ljg.340.1614920791278; Thu, 04 Mar 2021 21:06:31 -0800 (PST) MIME-Version: 1.0 From: Palash Oswal Date: Fri, 5 Mar 2021 10:36:19 +0530 Message-ID: Subject: BUG: soft lockup in corrupted To: io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, axboe@kernel.dk, Hillf Danton , Pavel Begunkov , syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, I was running syzkaller and I found the following issue : Head Commit : 27e543cca13fab05689b2d0d61d200a83cfb00b6 ( v5.11.2 ) Git Tree : stable Console logs: watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor497:423] Modules linked in: CPU: 0 PID: 423 Comm: syz-executor497 Not tainted 5.11.2 #13 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1 04/01/2014 RIP: 0010:__io_cqring_events fs/io_uring.c:1732 [inline] RIP: 0010:io_cqring_events fs/io_uring.c:2399 [inline] RIP: 0010:io_should_wake fs/io_uring.c:7190 [inline] RIP: 0010:io_cqring_wait fs/io_uring.c:7283 [inline] RIP: 0010:__do_sys_io_uring_enter+0x6b9/0x1040 fs/io_uring.c:9389 Code: 00 00 e8 ea 9a cd ff 31 ff 44 89 e6 e8 30 9d cd ff 45 85 e4 0f 85 5c 08 00 00 e8 d2 9a cd ff 48 8b 5d c0 48 8b 83 c0 00 00 00 <8b> 88 80 00 00 00 8b 83 00 02 00 00 29 c8 8b 4d c8 89 c7 89 85 78 watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor497:416] RSP: 0018:ffffc900001efe58 EFLAGS: 00000293 Modules linked in: CPU: 1 PID: 416 Comm: syz-executor497 Not tainted 5.11.2 #13 RAX: ffff888006d3e000 RBX: ffff8880059cb400 RCX: 0000000000000000 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1 04/01/2014 RDX: ffff888006da98c0 RSI: ffffffff81543cde RDI: 0000000000000003 RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x78/0x90 kernel/kcov.c:293 RBP: ffffc900001eff18 R08: ffff8880059cb680 R09: 0000000000002cc0 Code: 0c fd 28 00 00 00 48 39 ce 72 1f 48 83 c2 01 4c 89 64 08 e8 48 c7 44 08 e0 07 00 00 00 48 89 5c 08 f0 4c 89 74 f8 20 48 89 10 <5b> 41 5c 41 5d 41 5e 5d c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 RSP: 0018:ffffc900009f7e08 EFLAGS: 00000246 R13: ffff888005a68700 R14: ffff8880059cb400 R15: ffff8880059cb6a0 FS: 00000000015ed380(0000) GS:ffff88803ec00000(0000) knlGS:0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 RDX: 0000000000000000 RSI: ffff888007e98000 RDI: 0000000000000003 CR2: 00000000004bc0f0 CR3: 0000000007cd6003 CR4: 0000000000370ef0 RBP: ffffc900009f7e28 R08: ffff888006f39a80 R09: 0000000000002cc0 Call Trace: R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888007e98000 R14: ffffffff8152e286 R15: ffff888006f39aa0 FS: 00000000015ed380(0000) GS:ffff88803ed00000(0000) knlGS:0000000000000000 __se_sys_io_uring_enter fs/io_uring.c:9306 [inline] __x64_sys_io_uring_enter+0x2f/0x40 fs/io_uring.c:9306 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 do_syscall_64+0x38/0x90 arch/x86/entry/common.c:46 CR2: 00000000004bc0f0 CR3: 0000000006c12006 CR4: 0000000000370ee0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Call Trace: RIP: 0033:0x44508d signal_pending include/linux/sched/signal.h:369 [inline] io_run_task_work_sig+0x66/0x110 fs/io_uring.c:7213 Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 io_cqring_wait fs/io_uring.c:7276 [inline] __do_sys_io_uring_enter+0x67b/0x1040 fs/io_uring.c:9389 RSP: 002b:00007ffff7178208 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044508d __se_sys_io_uring_enter fs/io_uring.c:9306 [inline] __x64_sys_io_uring_enter+0x2f/0x40 fs/io_uring.c:9306 RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000003 do_syscall_64+0x38/0x90 arch/x86/entry/common.c:46 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 entry_SYSCALL_64_after_hwframe+0x44/0xa9 R10: 0000000000000001 R11: 0000000000000246 R12: 00000000004040c0 RIP: 0033:0x44508d R13: 0000000000000000 R14: 00007ffff7178240 R15: 00007ffff7178230 Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffff7178208 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044508d RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 00000000004040c0 R13: 0000000000000000 R14: 00007ffff7178240 R15: 00007ffff7178230 Syzkaller Reproducer : # {Threaded:false Collide:false Repeat:true RepeatTimes:0 Procs:8 Slowdown:1 Sandbox: Fault:false FaultCall:-1 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:false HandleSegv:false Repro:false Trace:false} r0 = syz_io_uring_setup(0x1, &(0x7f0000000080)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, &(0x7f00000a0000)=nil, &(0x7f00000b0000)=nil, &(0x7f0000000100)=0x0, &(0x7f0000000140)=0x0) syz_io_uring_submit(r1, r2, &(0x7f00000001c0)=@IORING_OP_OPENAT2={0x1c, 0x0, 0x0, 0xffffffffffffff9c, 0x0, 0x0, 0x0, 0x0, 0x12345}, 0x0) syz_memcpy_off$IO_URING_METADATA_GENERIC(r1, 0x10c, &(0x7f0000000000), 0x0, 0x4) io_uring_enter(r0, 0x1, 0x1, 0x1, 0x0, 0x0) C Reproducer: https://gist.github.com/oswalpalash/238a9956cee11f61449fc9a1f33da8c5 gcc -pthread repro.c -o repro ./repro Kernel Build Config: https://gist.github.com/oswalpalash/18e847d6e24e3452bc811526fd6f76bb