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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id D48BCC369C2 for ; Tue, 22 Apr 2025 19:17:34 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 27B116B0008; Tue, 22 Apr 2025 15:17:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 22A266B000A; Tue, 22 Apr 2025 15:17:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0F2756B000C; Tue, 22 Apr 2025 15:17:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id E0CE66B0008 for ; Tue, 22 Apr 2025 15:17:32 -0400 (EDT) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 78F2C5FAA0 for ; Tue, 22 Apr 2025 19:17:33 +0000 (UTC) X-FDA: 83362638786.25.13686B1 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) by imf28.hostedemail.com (Postfix) with ESMTP id C22BEC0002 for ; Tue, 22 Apr 2025 19:17:31 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=none; spf=pass (imf28.hostedemail.com: domain of 3SusHaAkbAIc39Avlwwp2l00to.rzzrwp53p2nzy4py4.nzx@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.206 as permitted sender) smtp.mailfrom=3SusHaAkbAIc39Avlwwp2l00to.rzzrwp53p2nzy4py4.nzx@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1745349451; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding:in-reply-to: references; bh=cyBDm2ZYj7cLn5Omsf047ecfidS0I0AxTIw8zpsgTPg=; b=sl91skqEaQLBFi1QLowXo+tUYQaDtmGvAa5uv3Y3+h4mJ/JeeIkabcpKRGq189KkFa4RnI X5gFqWw3ilVQUgv9TMyw5HhSPqruBxPwP2yDmuR7T2rBXOzUa+Z9TmZMQtWdeVk/z3rflA 3G7GcVTcoXMieq8yP+RosX/P8CtHk80= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=none; spf=pass (imf28.hostedemail.com: domain of 3SusHaAkbAIc39Avlwwp2l00to.rzzrwp53p2nzy4py4.nzx@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.206 as permitted sender) smtp.mailfrom=3SusHaAkbAIc39Avlwwp2l00to.rzzrwp53p2nzy4py4.nzx@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1745349451; a=rsa-sha256; cv=none; b=0tugYA6BARKjbUGnwZ1o8k+kCvl5HmMQo+2dzqa2o527Icw31dH/CITV0abw4jjjdi0oro G+/P9b1/36dhRcv5XSh5oGCaT1ClUyxz8Wt6Lt5CeZbjAWxz4TvbwaQnbCBHhZZLqTrOvB fwFFOp6B2+NKPSiIzcvxcPAgyKAKBMg= Received: by mail-il1-f206.google.com with SMTP id e9e14a558f8ab-3d81bc8ec0cso99814655ab.2 for ; Tue, 22 Apr 2025 12:17:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745349451; x=1745954251; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=cyBDm2ZYj7cLn5Omsf047ecfidS0I0AxTIw8zpsgTPg=; b=ibgYuqpxyp0ED1TqKtSWhbaIQ4NwgZZZGW/gZ7gt1EXqoSuhWjNJhhkNqSGOjquaKP u4ycwpdRZ1VXHfVWd/UDewReoSX3HHzGMcTSraw0JaPo3ReydUuVXmHHVnvWD2tvvCuQ c45qR2pmjZLlV7AjKVAL7G8RLkBlHCpiLzd2D6z8C1pxT7SRo4fopgFLBaepITYzPmR/ KADRxFYKkUoXuo0/fRV9O36P1PDQBdHf6ZNkuwZeIXDNHhLgFm8bSIdZY5FHa3/Uj5D5 71zJvRJtzhPdTPVLTjL+K/3wxc9ZkgX8WMAWZqxncJk/zj1E+lvabDhrGxG65hAwOP8i kAxw== X-Forwarded-Encrypted: i=1; AJvYcCWG3Er/TA5ZLAINXViT2pHCb6MShilEpGbVGewB2gdw4JypreZpsAgRR7aEIqxVVuzND/tKxJ6CqQ==@kvack.org X-Gm-Message-State: AOJu0Yw9OPJv3PMM6GTzTf4DymSvk7RUCexijlgNAImA9Bf/DbDdj+s0 nVzdE840CtlNUdCpBrmE0ESDyiCGFvkJcfZmCyzG8vFyJuqKNXbDpTGT7rf7tUHlXtSnWZ28DNR xojJIjaO0OxxEYJIoaQZEn2tZHZbHAxToOt4QXhuzqaCnBG+xShbCm5w= X-Google-Smtp-Source: AGHT+IHC1m62G5guSqyDDO0R9CXlhrXtqBEjq7z/HZTO5pgxQKAgDn5jhDJDMLKUWRQQ8rdAk2H7HuEK0FyOsX2khGMYyNeUpJvA MIME-Version: 1.0 X-Received: by 2002:a05:6e02:240a:b0:3d3:d00c:3602 with SMTP id e9e14a558f8ab-3d88edfb6e6mr180204625ab.10.1745349450982; Tue, 22 Apr 2025 12:17:30 -0700 (PDT) Date: Tue, 22 Apr 2025 12:17:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6807eb4a.050a0220.36a438.0000.GAE@google.com> Subject: [syzbot] [fs?] [mm?] INFO: task hung in page_cache_ra_order From: syzbot To: akpm@linux-foundation.org, arnd@arndb.de, hch@lst.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, thuth@redhat.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: 69cqo7stnkfrznst7pnrjs3cgatqibqr X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: C22BEC0002 X-Rspam-User: X-HE-Tag: 1745349451-80224 X-HE-Meta: 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 VEFIOnOk f6UPN9ryv9TArt4F+GiTyfcoM++29iVa3UPmU83l6ritHDChg4CWktH+Brdc9ZnPw4qAqTip1SfOjtuYfH+lpU/7q5Gk8ZuAKWX6KkLw2UdYkTuS/U+aQGl58Ar01PDm1Y2tKRQjebmxCz8qNkad0opL5BL8lIdIAlygoHtzQ7l38NC2azsqzq2AbtNDIAx5MRAWhCbOmBTNo4eR79/U1EazHt5WCbCYRrpQucwxC+rB/vAdbbzYLA/lxLq/GKyXptefsBVuxkGlRORPeW5N3kKpr+mte7nHdXXsMOQZJwyH6clC+WyA3ymSKGkMIsoQVNpzTqJODCXS6SbVZhKBkxKLuy9jS7qqYBcJepDUhxoXloembxNVDdyTwK0SSCUmXaOLc8Vj5/LVpqMCBHX6srmFKbNNljH+k1B0MmhUU5/if1zwppPQeoGMy/tBzhbQtl2PEQ1LMq73bHxm+hRktf19BusZwVOTvW7YC0NCj6oPii2oKyD9kxVYcjPdVoNcgFjV7ieZBDCP21rIOCxMPCe9w3wmcnDrbJNiKcilEvNNSMdtYQJvWyy5XuucRNRvDbMusWBEQs9GHpgF3arGtQenG5GDoC1hbtffplURA1VTQHgr//1aHrR/Jx1Ui9un3+PsJQTi0hyjgfYG20gVRgkpo0XsqIf3wLuxvP1Y/D6q2pTEb60x7h2YHMspKw38Ov49Y05tIuBSvFQ93Nt4n6JAoZYD29/I5hecY5s8Fwuu+eR/nA3lkSARNG4dP+YOGH7NssUGLkZFJCU+wDXbidq7GmHLYuoZWh5JmUAaR8hDkuEmrzrfF5UAQdQltN+f/fksn6XspbZKNNMDPTlMnvuFWM40gV5HKsKeR1EZyHqaaCYr8xWlVOP77+RVExDH5QUXs2WnG+H89Xxwfv7cz3TfLNEwx8ZdNJzc3Ld+zskt5uPncOugrgm8HjI1AQp7wYCp0ym9Vvf9o+zpYYyTZ8lNbuslJ airdqRhx ToDt8BVwZDS4VbyGMlS3JFWf7eSYgGWBmnG3lrhUKAbwJYeEHtbFVdJkKd8d1iIhlDvecPhO0noslzlpx8nXCWUhgNyZtLx9UiswW79W/FOHf7EZbCnSEfp/Fp3cwxGYoPDlMSBW1u0B6PAGOOX9DpZj+S1zizo3YNKRbEFjPi7epufudTJsTxprBdnT5vEfkd6qFBUxUsfM/BjqbMGCKZRajmruHezQFGs77am1aV1L7R9hHwnK/ZaJ2/5ujkeZxn8E3YbynIKbgZ8dXZhsfOOkcGdv69n8xpDT3cThXeRKx6enB8NdEER1fKF5KThTuseBUoe/tUpyat9Mduql5fWHtU/66rraOlGTj647PO2+nYGA7+OUO96chwAzIvkD4/+LFQcGfKq2wy8pi1YEpHBA+mMkpse8 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: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: fc96b232f8e7 Merge tag 'pci-v6.15-fixes-2' of git://git.ke.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=146337cf980000 kernel config: https://syzkaller.appspot.com/x/.config?x=2a31f7155996562 dashboard link: https://syzkaller.appspot.com/bug?extid=f719dec20853d1563edc compiler: Debian clang version 15.0.6, Debian LLD 15.0.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10f9d470580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17125fe4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c90d59ce6487/disk-fc96b232.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/78fd0e48c804/vmlinux-fc96b232.xz kernel image: https://storage.googleapis.com/syzbot-assets/58353c4d5ca1/bzImage-fc96b232.xz The issue was bisected to: commit 3e25d5a49f99b75be2c6cfb165e4f77dc6d739a2 Author: Christoph Hellwig Date: Wed Oct 23 05:36:37 2024 +0000 asm-generic: add an optional pfn_valid check to page_to_phys bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=166cb4cc580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=156cb4cc580000 console output: https://syzkaller.appspot.com/x/log.txt?x=116cb4cc580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f719dec20853d1563edc@syzkaller.appspotmail.com Fixes: 3e25d5a49f99 ("asm-generic: add an optional pfn_valid check to page_to_phys") INFO: task syz-executor690:5861 blocked for more than 143 seconds. Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor690 state:D stack:23400 pid:5861 tgid:5860 ppid:5859 task_flags:0x440040 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1b88/0x5240 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0x163/0x360 kernel/sched/core.c:6860 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x6ff/0xa50 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491 filemap_readahead mm/filemap.c:2560 [inline] filemap_get_pages+0x9ec/0x1fc0 mm/filemap.c:2605 filemap_splice_read+0x690/0xef0 mm/filemap.c:2981 do_splice_read fs/splice.c:979 [inline] splice_direct_to_actor+0x4af/0xc90 fs/splice.c:1083 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x281/0x3d0 fs/splice.c:1227 do_sendfile+0x582/0x8c0 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1429 [inline] __se_sys_sendfile64+0x17e/0x1e0 fs/read_write.c:1415 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8463035369 RSP: 002b:00007f8462fee228 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f84630bf328 RCX: 00007f8463035369 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003 RBP: 00007f84630bf320 R08: 00007f8462fee6c0 R09: 00007f8462fee6c0 R10: 000400000000003f R11: 0000000000000246 R12: 00007f84630bf32c R13: 0000200000001000 R14: 6c756e2f7665642f R15: 00007ffd91caffd8 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764 1 lock held by klogd/5202: 2 locks held by getty/5601: #0: ffff8880346d00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222 1 lock held by syz-executor690/5861: #0: ffff88802395b740 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] #0: ffff88802395b740 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491 3 locks held by syz-executor690/5862: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline] watchdog+0x1058/0x10a0 kernel/hung_task.c:437 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5862 Comm: syz-executor690 Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:124 [inline] RIP: 0010:lock_acquire+0xae/0x2f0 kernel/locking/lockdep.c:5842 Code: e8 97 67 8e 00 83 3d f0 ae c1 0e 00 0f 84 ef 00 00 00 65 8b 05 c3 35 ca 11 85 c0 0f 85 e0 00 00 00 65 48 8b 04 25 08 60 68 93 <83> b8 ec 0a 00 00 00 0f 85 ca 00 00 00 48 c7 44 24 10 00 00 00 00 RSP: 0018:ffffc9000408ee68 EFLAGS: 00000246 RAX: ffff8880782ada00 RBX: ffffffff8ed3df20 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff816d9be5 RDI: 1ffffffff1da7be4 RBP: ffffffff93686020 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc9000408f020 R11: fffff52000811e10 R12: 0000000000000000 R13: 0000000000000002 R14: ffffffff816dc508 R15: 0000000000000000 FS: 00007f8462fcd6c0(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005606e6d75600 CR3: 000000002f6f0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xd5/0x23b0 arch/x86/kernel/unwind_orc.c:479 __unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe7/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4217 mempool_alloc_noprof+0x199/0x5a0 mm/mempool.c:402 bio_alloc_bioset+0x26f/0x1130 block/bio.c:554 bio_alloc_clone block/bio.c:864 [inline] bio_split+0x107/0x490 block/bio.c:1587 bio_submit_split+0x98/0x600 block/blk-merge.c:116 __bio_split_to_limits block/blk.h:390 [inline] blk_mq_submit_bio+0x18a6/0x25e0 block/blk-mq.c:3110 __submit_bio+0x1d2/0x6d0 block/blk-core.c:635 __submit_bio_noacct_mq block/blk-core.c:722 [inline] submit_bio_noacct_nocheck+0x57b/0xe30 block/blk-core.c:751 bio_chain_and_submit+0xed/0x130 block/bio.c:361 __blkdev_issue_zero_pages+0x218/0x290 block/blk-lib.c:222 blkdev_issue_zero_pages block/blk-lib.c:238 [inline] blkdev_issue_zeroout+0x651/0x880 block/blk-lib.c:325 blkdev_fallocate+0x3dd/0x490 block/fops.c:-1 vfs_fallocate+0x627/0x7a0 fs/open.c:338 ksys_fallocate fs/open.c:362 [inline] __do_sys_fallocate fs/open.c:367 [inline] __se_sys_fallocate fs/open.c:365 [inline] __x64_sys_fallocate+0xbc/0x110 fs/open.c:365 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8463035369 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8462fcd228 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f84630bf338 RCX: 00007f8463035369 RDX: 0000000008000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00007f84630bf330 R08: 00007f8462fcd6c0 R09: 00007f8462fcd6c0 R10: 0008004000000200 R11: 0000000000000246 R12: 00007f84630bf33c R13: 0000200000001000 R14: 6c756e2f7665642f R15: 00007ffd91caffd8 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.578 msecs --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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