From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-it1-f199.google.com (mail-it1-f199.google.com [209.85.166.199]) by kanga.kvack.org (Postfix) with ESMTP id 8D3E78E0002 for ; Thu, 3 Jan 2019 05:43:04 -0500 (EST) Received: by mail-it1-f199.google.com with SMTP id w68so26308398ith.0 for ; Thu, 03 Jan 2019 02:43:04 -0800 (PST) Received: from mail-sor-f69.google.com (mail-sor-f69.google.com. [209.85.220.69]) by mx.google.com with SMTPS id h3sor3145445jaa.13.2019.01.03.02.43.03 for (Google Transport Security); Thu, 03 Jan 2019 02:43:03 -0800 (PST) MIME-Version: 1.0 Date: Thu, 03 Jan 2019 02:43:02 -0800 Message-ID: <0000000000004d2e19057e8b6d78@google.com> Subject: kernel BUG at mm/huge_memory.c:LINE! From: syzbot Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org, aneesh.kumar@linux.vnet.ibm.com, hughd@google.com, jglisse@redhat.com, khlebnikov@yandex-team.ru, kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, rientjes@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, willy@infradead.org Hello, syzbot found the following crash on: HEAD commit: 4cd1b60def51 Add linux-next specific files for 20190102 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=147760d3400000 kernel config: https://syzkaller.appspot.com/x/.config?x=e8ea56601353001c dashboard link: https://syzkaller.appspot.com/bug?extid=8e075128f7db8555391a compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+8e075128f7db8555391a@syzkaller.appspotmail.com raw: 01fffc000009000d dead000000000100 dead000000000200 ffff88809a33f5b1 raw: 0000000000020000 0000000000000000 0000020000000000 ffff888095368000 page dumped because: VM_BUG_ON_PAGE(compound_mapcount(head)) page->mem_cgroup:ffff888095368000 ------------[ cut here ]------------ kernel BUG at mm/huge_memory.c:2683! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1551 Comm: kswapd0 Not tainted 4.20.0-next-20190102 #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:split_huge_page_to_list+0x2161/0x2ac0 mm/huge_memory.c:2683 Code: ff e8 33 35 b8 ff 48 8b 85 10 fc ff ff 4c 8d 70 ff e9 1e ea ff ff e8 1e 35 b8 ff 48 c7 c6 a0 a3 54 88 4c 89 ef e8 0f 15 ea ff <0f> 0b 48 89 85 10 fc ff ff e8 01 35 b8 ff 48 8b 85 10 fc ff ff 4c RSP: 0018:ffff8880a5f36de8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880a5f371d8 RCX: 0000000000000000 RDX: ffffed1014be6d6e RSI: ffffffff81b3831e RDI: ffffed1014be6dae RBP: ffff8880a5f37200 R08: 0000000000000021 R09: ffffed1015cc5021 R10: ffffed1015cc5020 R11: ffff8880ae628107 R12: ffffea0000e80080 R13: ffffea0000e80000 R14: 00000000fffffffe R15: 01fffc000009000d FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020003030 CR3: 0000000219267000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: split_huge_page include/linux/huge_mm.h:148 [inline] deferred_split_scan+0xa47/0x11d0 mm/huge_memory.c:2820 do_shrink_slab+0x4e5/0xd30 mm/vmscan.c:561 shrink_slab mm/vmscan.c:710 [inline] shrink_slab+0x6bb/0x8c0 mm/vmscan.c:690 shrink_node+0x61a/0x17e0 mm/vmscan.c:2776 kswapd_shrink_node mm/vmscan.c:3535 [inline] balance_pgdat+0xb00/0x18b0 mm/vmscan.c:3693 kswapd+0x839/0x1330 mm/vmscan.c:3948 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: kobject: 'loop1' (000000002d2ad2ad): kobject_uevent_env kobject: 'loop1' (000000002d2ad2ad): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000003c94a079): kobject_uevent_env kobject: 'loop3' (000000003c94a079): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (0000000000e89d9d): kobject_uevent_env kobject: 'loop5' (0000000000e89d9d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000001a685ee7): kobject_uevent_env kobject: 'loop2' (000000001a685ee7): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000003c94a079): kobject_uevent_env kobject: 'loop3' (000000003c94a079): fill_kobj_path: path = '/devices/virtual/block/loop3' ---[ end trace a543f5c1741fca97 ]--- kobject: 'loop0' (00000000aa59ea1f): kobject_uevent_env RIP: 0010:split_huge_page_to_list+0x2161/0x2ac0 mm/huge_memory.c:2683 Code: ff e8 33 35 b8 ff 48 8b 85 10 fc ff ff 4c 8d 70 ff e9 1e ea ff ff e8 1e 35 b8 ff 48 c7 c6 a0 a3 54 88 4c 89 ef e8 0f 15 ea ff <0f> 0b 48 89 85 10 fc ff ff e8 01 35 b8 ff 48 8b 85 10 fc ff ff 4c kobject: 'loop0' (00000000aa59ea1f): fill_kobj_path: path = '/devices/virtual/block/loop0' RSP: 0018:ffff8880a5f36de8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880a5f371d8 RCX: 0000000000000000 RDX: ffffed1014be6d6e RSI: ffffffff81b3831e RDI: ffffed1014be6dae RBP: ffff8880a5f37200 R08: 0000000000000021 R09: ffffed1015cc5021 netlink: 'syz-executor0': attribute type 22 has an invalid length. R10: ffffed1015cc5020 R11: ffff8880ae628107 R12: ffffea0000e80080 R13: ffffea0000e80000 R14: 00000000fffffffe R15: 01fffc000009000d FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 kobject: 'loop1' (000000002d2ad2ad): kobject_uevent_env kobject: 'loop1' (000000002d2ad2ad): fill_kobj_path: path = '/devices/virtual/block/loop1' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004efb18 CR3: 00000000702a7000 CR4: 00000000001426e0 kobject: 'loop5' (0000000000e89d9d): kobject_uevent_env DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop5' (0000000000e89d9d): fill_kobj_path: path = '/devices/virtual/block/loop5' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop3' (000000003c94a079): kobject_uevent_env --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. 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 X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A77ABC43387 for ; Thu, 3 Jan 2019 10:43:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5AC832073D for ; Thu, 3 Jan 2019 10:43:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5AC832073D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D4D9A8E0069; Thu, 3 Jan 2019 05:43:04 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id CFD938E0002; Thu, 3 Jan 2019 05:43:04 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B9EB38E0069; Thu, 3 Jan 2019 05:43:04 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-it1-f199.google.com (mail-it1-f199.google.com [209.85.166.199]) by kanga.kvack.org (Postfix) with ESMTP id 8D3E78E0002 for ; Thu, 3 Jan 2019 05:43:04 -0500 (EST) Received: by mail-it1-f199.google.com with SMTP id w68so26308398ith.0 for ; Thu, 03 Jan 2019 02:43:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:mime-version :date:message-id:subject:from:to; bh=V0j99+Hub4s7kRPs6RBQ8vZCsSukjPrjXf95nSYp5co=; b=m7QjgQ0mDu8TnasBjPWub1LGzbi+CmEiLc1c8QSPTceoggeF0rWv2ayGpIvfjQXmcO O+xCO8BnSApEFVfYOQkBBPreNSJ6O6mK7PGpvtOoyH9LWVZNcxgqR+UBqnQfkCtAjtCR 3DnaPbM5miffzHE8pKnryY5GjLxx+o20QH8HWbkjJoKj1EAJdC8piPJA1eCq/4CrAUrE EdQG6SLRDaF6rK84fJ6Fq7lRIAe5vDubSWCogYc1SaBja8wnRxjRxfDBwLGdnUFZrZW0 vknfPYhZKjHCYxKHclaJn4UTbovNUnmv3UlQYZ8gbDSvVJRVw6sciqz+CREAliIEhYjQ YLpA== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3nuctxakbakmvbcndoohudsslg.jrrjohxvhufrqwhqw.frp@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3NuctXAkbAKMVbcNDOOHUDSSLG.JRRJOHXVHUFRQWHQW.FRP@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com X-Gm-Message-State: AJcUukfS8b7PnBt74+zAWa9r0hb1gXpLh3d7kr7oxg67u8Trw8bF/Dp3 mZ4qXdVH0ca7QNSD0v8L3tmdOZ2muwyVTjW+mJcKhty92KJm+GXUgh2/qbuZpauEFVBGpzsDoyi F7KHUO3Q4ZJHaYsNw7Lae0vQr/BgOo0Q2aPxwrRezFxKMa5gmgWO+BzEMTZZvCbanIlC4aGZhgI CXLe0NSVLp9J3gU8wqPGgSTLXnWgC1gSGFCLaksItzqJmS2WDp7t3daluylczdqaunw7ElkH0/E xFMstzAVqze/iFKVWSuEFOefBsnEVbGRaQpH4IWiL3lRF/2lsaZDF5gg4vK2gk5byoFPgtKFJpl qVTSQRlDn0HEx5vAlg02mJuJn7WpljxjOUhk2WpmU4IlLWNW75hTtj+RDCbbvWmI8Pdg3CkGLg= = X-Received: by 2002:a5e:860a:: with SMTP id z10mr30415444ioj.35.1546512184121; Thu, 03 Jan 2019 02:43:04 -0800 (PST) X-Received: by 2002:a5e:860a:: with SMTP id z10mr30415419ioj.35.1546512183208; Thu, 03 Jan 2019 02:43:03 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1546512183; cv=none; d=google.com; s=arc-20160816; b=FPLIgjj04g4rqNkXBCszADeAqXgPz1CwOJYNWz3vH3EnX5TfmA1YwLoTpUg0F5rYzu L9f8Smq2bepI3bqMytkdVNeLMv+wj6Ba6wZTqwYLyy3YYj4nmV3PlFmYd3fGAOutiqZa teSkDjLWYfpJ1uisH4jJnWXb4FrdH1PEA/e3YKRQqc51ro4k/HgQ9W/ILTtyzjgDG0Au dpGNwVjA+1V4J6UnSl9qV5ZTPUrc+5zrK63Lk0jS6dWbgj6JRFRGmyiaCoG3Yd+rk5q+ DQ/wbH3LCKQCz10a3BsgLiYu5eet4VbXcriyn73YFHTrZd9Kp0vN/V7G8cq4MVALOSlN rZww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=to:from:subject:message-id:date:mime-version; bh=V0j99+Hub4s7kRPs6RBQ8vZCsSukjPrjXf95nSYp5co=; b=dedf8wo7ejlC6LW4ZvC9sA1RETiC21xZdYv5ueUAPSECz8MyM2FPQDKXKK8WDLwaHv 3lV4vRvSzcX56SF4nRhZOzNOAymgqWfCWUqv8/C14kLJPMMSu+BiIb55WJJQTePqw9Ta gNwr3znd9dJGZUBzguM370b2iHX5coGAy93ESmPtPtgcPQgJIdE1uatp+PTA3UmPo6u7 SGRPgNwt9zm3ljNHXLQo12fIQIO9yYOVeks2vdaOvuuKieiGZ6Hhkeb9oxoEh+n7sHd0 mrJJlk2qvpWNNUIhABBT47+22Ddo0AnwxSjvocUvCUHKj7BdoV9aO449k1/38cYMCHjc iAkg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of 3nuctxakbakmvbcndoohudsslg.jrrjohxvhufrqwhqw.frp@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3NuctXAkbAKMVbcNDOOHUDSSLG.JRRJOHXVHUFRQWHQW.FRP@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: from mail-sor-f69.google.com (mail-sor-f69.google.com. [209.85.220.69]) by mx.google.com with SMTPS id h3sor3145445jaa.13.2019.01.03.02.43.03 for (Google Transport Security); Thu, 03 Jan 2019 02:43:03 -0800 (PST) Received-SPF: pass (google.com: domain of 3nuctxakbakmvbcndoohudsslg.jrrjohxvhufrqwhqw.frp@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) client-ip=209.85.220.69; Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3nuctxakbakmvbcndoohudsslg.jrrjohxvhufrqwhqw.frp@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3NuctXAkbAKMVbcNDOOHUDSSLG.JRRJOHXVHUFRQWHQW.FRP@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com X-Google-Smtp-Source: AFSGD/VPDITGcFF58V1KD9Ffb6MQMte+tc5QCezBsbFMXPMInydGetzkh/mMrq+AEj8BGXWvlZ4HOfBbOZLubYijH0oVmdZjn72i MIME-Version: 1.0 X-Received: by 2002:a02:b5e5:: with SMTP id y34mr36739548jaj.21.1546512182878; Thu, 03 Jan 2019 02:43:02 -0800 (PST) Date: Thu, 03 Jan 2019 02:43:02 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004d2e19057e8b6d78@google.com> Subject: kernel BUG at mm/huge_memory.c:LINE! From: syzbot To: akpm@linux-foundation.org, aneesh.kumar@linux.vnet.ibm.com, hughd@google.com, jglisse@redhat.com, khlebnikov@yandex-team.ru, kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, rientjes@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, willy@infradead.org Content-Type: text/plain; charset="UTF-8"; delsp="yes"; format="flowed" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Message-ID: <20190103104302.nqwdOoFhbofAXkHPpR8ibCn8tUeZYmdvmPWcJkgyHcE@z> Hello, syzbot found the following crash on: HEAD commit: 4cd1b60def51 Add linux-next specific files for 20190102 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=147760d3400000 kernel config: https://syzkaller.appspot.com/x/.config?x=e8ea56601353001c dashboard link: https://syzkaller.appspot.com/bug?extid=8e075128f7db8555391a compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+8e075128f7db8555391a@syzkaller.appspotmail.com raw: 01fffc000009000d dead000000000100 dead000000000200 ffff88809a33f5b1 raw: 0000000000020000 0000000000000000 0000020000000000 ffff888095368000 page dumped because: VM_BUG_ON_PAGE(compound_mapcount(head)) page->mem_cgroup:ffff888095368000 ------------[ cut here ]------------ kernel BUG at mm/huge_memory.c:2683! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1551 Comm: kswapd0 Not tainted 4.20.0-next-20190102 #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:split_huge_page_to_list+0x2161/0x2ac0 mm/huge_memory.c:2683 Code: ff e8 33 35 b8 ff 48 8b 85 10 fc ff ff 4c 8d 70 ff e9 1e ea ff ff e8 1e 35 b8 ff 48 c7 c6 a0 a3 54 88 4c 89 ef e8 0f 15 ea ff <0f> 0b 48 89 85 10 fc ff ff e8 01 35 b8 ff 48 8b 85 10 fc ff ff 4c RSP: 0018:ffff8880a5f36de8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880a5f371d8 RCX: 0000000000000000 RDX: ffffed1014be6d6e RSI: ffffffff81b3831e RDI: ffffed1014be6dae RBP: ffff8880a5f37200 R08: 0000000000000021 R09: ffffed1015cc5021 R10: ffffed1015cc5020 R11: ffff8880ae628107 R12: ffffea0000e80080 R13: ffffea0000e80000 R14: 00000000fffffffe R15: 01fffc000009000d FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020003030 CR3: 0000000219267000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: split_huge_page include/linux/huge_mm.h:148 [inline] deferred_split_scan+0xa47/0x11d0 mm/huge_memory.c:2820 do_shrink_slab+0x4e5/0xd30 mm/vmscan.c:561 shrink_slab mm/vmscan.c:710 [inline] shrink_slab+0x6bb/0x8c0 mm/vmscan.c:690 shrink_node+0x61a/0x17e0 mm/vmscan.c:2776 kswapd_shrink_node mm/vmscan.c:3535 [inline] balance_pgdat+0xb00/0x18b0 mm/vmscan.c:3693 kswapd+0x839/0x1330 mm/vmscan.c:3948 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: kobject: 'loop1' (000000002d2ad2ad): kobject_uevent_env kobject: 'loop1' (000000002d2ad2ad): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000003c94a079): kobject_uevent_env kobject: 'loop3' (000000003c94a079): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (0000000000e89d9d): kobject_uevent_env kobject: 'loop5' (0000000000e89d9d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000001a685ee7): kobject_uevent_env kobject: 'loop2' (000000001a685ee7): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000003c94a079): kobject_uevent_env kobject: 'loop3' (000000003c94a079): fill_kobj_path: path = '/devices/virtual/block/loop3' ---[ end trace a543f5c1741fca97 ]--- kobject: 'loop0' (00000000aa59ea1f): kobject_uevent_env RIP: 0010:split_huge_page_to_list+0x2161/0x2ac0 mm/huge_memory.c:2683 Code: ff e8 33 35 b8 ff 48 8b 85 10 fc ff ff 4c 8d 70 ff e9 1e ea ff ff e8 1e 35 b8 ff 48 c7 c6 a0 a3 54 88 4c 89 ef e8 0f 15 ea ff <0f> 0b 48 89 85 10 fc ff ff e8 01 35 b8 ff 48 8b 85 10 fc ff ff 4c kobject: 'loop0' (00000000aa59ea1f): fill_kobj_path: path = '/devices/virtual/block/loop0' RSP: 0018:ffff8880a5f36de8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880a5f371d8 RCX: 0000000000000000 RDX: ffffed1014be6d6e RSI: ffffffff81b3831e RDI: ffffed1014be6dae RBP: ffff8880a5f37200 R08: 0000000000000021 R09: ffffed1015cc5021 netlink: 'syz-executor0': attribute type 22 has an invalid length. R10: ffffed1015cc5020 R11: ffff8880ae628107 R12: ffffea0000e80080 R13: ffffea0000e80000 R14: 00000000fffffffe R15: 01fffc000009000d FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 kobject: 'loop1' (000000002d2ad2ad): kobject_uevent_env kobject: 'loop1' (000000002d2ad2ad): fill_kobj_path: path = '/devices/virtual/block/loop1' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004efb18 CR3: 00000000702a7000 CR4: 00000000001426e0 kobject: 'loop5' (0000000000e89d9d): kobject_uevent_env DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop5' (0000000000e89d9d): fill_kobj_path: path = '/devices/virtual/block/loop5' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop3' (000000003c94a079): kobject_uevent_env --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.