From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 928AAC4332F for ; Thu, 20 Oct 2022 12:59:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230118AbiJTM7w (ORCPT ); Thu, 20 Oct 2022 08:59:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230285AbiJTM7s (ORCPT ); Thu, 20 Oct 2022 08:59:48 -0400 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9EAD3BAE for ; Thu, 20 Oct 2022 05:59:42 -0700 (PDT) Received: by mail-il1-f199.google.com with SMTP id x6-20020a056e021bc600b002fc96f780e7so20125511ilv.10 for ; Thu, 20 Oct 2022 05:59:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=4hi8rEJq2YX1jSHUhJLl2Vtr/5VvQ8mSGRcQz0nCmo4=; b=u4A5GZNB0sdU/Ffu0fU9fEOqE02kgiF5/WhycoYpnM1Be9Es5dPRAvjV6WRsfMcAEN asUVf4MXpkpno8fXw/ua+WHZ43rCAoO+lJqyZb8LsfC6FlhM+gk9v2YH8i50bKuyWLXM CK0Bi+m38pr1lj26ouybNer0pA4Fgd8Od7+xdReExSKgUQ2n5zp4n+IhZg827Z1CDf0A ZlozHHwgQc+iH2h0QnIdWl2m9sdLB5N1bmZhqfWbfUq+d/qjdeYbJRGT1naiHwXLJJ0F Tb2UF1OemPG7I706H7Wp3Ws7tMh8yHnSHUfe79r6n7sViKaH07yo705QXFdjHlorUSyL b71A== X-Gm-Message-State: ACrzQf0kT74fEPNnpiaLrjRGDc+KH+Zk+hWmhvlZP61Abq9HaaWr4vT0 QeQLmT3UG69+i/QfAbgwDSRr9duD9p0jv0Lq2XuP0I1g0Ioz X-Google-Smtp-Source: AMsMyM5GC6iijSslBJ5Vnh4I4n+l4Nuk9X0UMEuoC/LcrNCyEA2I8Ko2vIXOSi8ksKxGFSK4zaQPTkmNsDpv8H8dj71ud5By+kyr MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c05:b0:2fc:2f37:75c3 with SMTP id l5-20020a056e021c0500b002fc2f3775c3mr10363032ilh.149.1666270781978; Thu, 20 Oct 2022 05:59:41 -0700 (PDT) Date: Thu, 20 Oct 2022 05:59:41 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000f3fec05eb76e68f@google.com> Subject: [syzbot] BUG: sleeping function called from invalid context in break_ksm From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: acee3e83b493 Add linux-next specific files for 20221020 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=15961f62880000 kernel config: https://syzkaller.appspot.com/x/.config?x=c82245cfb913f766 dashboard link: https://syzkaller.appspot.com/bug?extid=78a0878b3076f71313b3 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1255612c880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12a1bed2880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/98cc5896cded/disk-acee3e83.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b3d3eb3aa10a/vmlinux-acee3e83.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+78a0878b3076f71313b3@syzkaller.appspotmail.com BUG: sleeping function called from invalid context at mm/ksm.c:500 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3610, name: syz-executor212 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [<0000000000000000>] 0x0 CPU: 0 PID: 3610 Comm: syz-executor212 Not tainted 6.1.0-rc1-next-20221020-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9890 break_ksm.part.0+0xbe/0x160 mm/ksm.c:500 break_ksm mm/ksm.c:875 [inline] unmerge_ksm_pages+0x1a0/0x240 mm/ksm.c:881 unmerge_and_remove_all_rmap_items mm/ksm.c:1021 [inline] run_store+0x3cf/0xa30 mm/ksm.c:2983 kobj_attr_store+0x50/0x80 lib/kobject.c:824 sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x3f8/0x610 fs/kernfs/file.c:330 call_write_iter include/linux/fs.h:2191 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9e9/0xdd0 fs/read_write.c:584 ksys_write+0x127/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc23ce26b39 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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:00007fff3f50c3a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc23ce26b39 RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007fc23cdeace0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc23cdead70 R13: 0000000000000000 R14: 0000000000000000 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches