From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (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 5F04517C67 for ; Mon, 20 May 2024 07:12:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716189147; cv=none; b=Xb2PCmgA6nwEPI6NrBk8Du2CIVsYuoGO/qyaH538E1xGiR0Qim9nEf0RN2EPJtVVWQU0bYVO7xH/GnQi/24cJbUVjfGRlqU8XNUlPX1ymA7TkEAWkyCqGl7sZm3dihB0JbHsnba+MEaFKhMklL06IhLmC8YGefa1RAi6hj6lDLo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716189147; c=relaxed/simple; bh=HdSe5NKtEbkv5X2azDCfiLrS6TQP0fL8ACjGdAYdsqY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=VdoOf+SREvEBBczFBa1wQddFM57QK5f2u+2qrxaumvMaD57hTb/6co5uFt33Ff34shnyg490YOUHlC1/JdzElR0F4RcFMlCK8XofkWaDBoK6thf1/XoyCrmSLYE5gB9Df/03efSNv93YE9Z/qXyyQoR790Zp2jyVrAz59QqSCFU= 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=209.85.166.78 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-io1-f78.google.com with SMTP id ca18e2360f4ac-7e1b65780b7so1237272339f.2 for ; Mon, 20 May 2024 00:12:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716189144; x=1716793944; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=SBScJFSoP+QAp8D3oEJp/AZqhhLav73CUmlNAAy3P5Y=; b=fENHDI18fd6z7kBdSjpanL7N1k20KppE4orEaYUJxkBMcpLCkXi+r1K2y09JQeOwD/ EF1z4ZZDmoxY9n+nIGmQTa1zZSMPPd3op0sbbq13jT/6E/ElMwkv1Za6IyrhUtwjb9jx bztbPvfQYNB5/jfn3NBkBgm4Aoa3a2ssg9DR7589iBhkavV9JoaxHxwj8GvDfiTCDmyM 7HYXapBE7vdTp6pWswCrbBl5WUhy8djhtWoWA0/6nd0flvBOmbxKOsZS3D6Z9n+TM35E dcRd8+RABip85YVLhDJqqkHiiSI2Cm30WTG8gjcN6H4nScIhiWu4ekN24ZobEp0lo34h UhyA== X-Forwarded-Encrypted: i=1; AJvYcCUf0vlxpjwUzegxjoMLkzR9E3hYBmBsb0+WllQseFNN1yR6YjY8ri1UNiydOsJy/IpIX/BvI19noDtklwOz2i8DduvEqJLwr9PZwNrGdLU= X-Gm-Message-State: AOJu0YyT8TFxBxcxnLLe9BQ5wo36PHJa4E9iOTShiCLDGhRnXZQHEZwR bLh7WuZP/a/Yu2rztJ2kUlAsC1jwnDJSRs1IZTh1J4VjldtGpp2S25mKP1C1c4OI2fiDsTj3Nlr n2KEBTTF/f1w3qkATPZVLJHP1x+YrPO2HZsipInS72jl7/yxayzUuiGE= X-Google-Smtp-Source: AGHT+IERYBwCkEzRrHVYv0kkDcamD8sBWyp+tWpnLnvrCSgJOIfkaWnrKMkBgSR1JOkYNM7dHFamDRg0p1yOgiESf8bJonyo/sin Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8506:b0:488:f465:f4cd with SMTP id 8926c6da1cb9f-4895856fa08mr2097682173.1.1716189144565; Mon, 20 May 2024 00:12:24 -0700 (PDT) Date: Mon, 20 May 2024 00:12:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000545c120618dd6c63@google.com> Subject: [syzbot] [bcachefs?] INFO: task hung in bch2_readahead From: syzbot To: bfoster@redhat.com, kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 8c06da67d0bd Merge tag 'livepatching-for-6.10' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11e74ef4980000 kernel config: https://syzkaller.appspot.com/x/.config?x=cc69cd6a2dcb5aa dashboard link: https://syzkaller.appspot.com/bug?extid=a6060114362257e9798a compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/331202aeac12/disk-8c06da67.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4db56871f364/vmlinux-8c06da67.xz kernel image: https://storage.googleapis.com/syzbot-assets/2ab7bc870390/bzImage-8c06da67.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a6060114362257e9798a@syzkaller.appspotmail.com INFO: task syz-executor.4:6256 blocked for more than 143 seconds. Not tainted 6.9.0-syzkaller-07387-g8c06da67d0bd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:14936 pid:6256 tgid:6255 ppid:5481 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1796/0x4a00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6838 __bch2_two_state_lock+0x171/0x200 fs/bcachefs/two_state_shared_lock.c:7 bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:56 [inline] bch2_readahead+0xcf5/0x1870 fs/bcachefs/fs-io-buffered.c:277 read_pages+0x17e/0x840 mm/readahead.c:160 page_cache_ra_order+0xa62/0xcc0 mm/readahead.c:531 filemap_readahead mm/filemap.c:2480 [inline] filemap_get_pages+0x743/0x2090 mm/filemap.c:2521 filemap_splice_read+0x654/0xeb0 mm/filemap.c:2870 do_splice_read fs/splice.c:985 [inline] splice_direct_to_actor+0x4b7/0xc90 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x28c/0x3e0 fs/splice.c:1233 do_sendfile+0x56d/0xdc0 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1348 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8ff447cee9 RSP: 002b:00007f8ff52d30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f8ff45abf80 RCX: 00007f8ff447cee9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007f8ff44c949e R08: 0000000000000000 R09: 0000000000000000 R10: 000000007ffff000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8ff45abf80 R15: 00007ffe62ab44e8 INFO: task syz-executor.4:6292 blocked for more than 144 seconds. Not tainted 6.9.0-syzkaller-07387-g8c06da67d0bd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:18064 pid:6292 tgid:6255 ppid:5481 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1796/0x4a00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6838 io_schedule+0x8d/0x110 kernel/sched/core.c:9044 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1283 bch2_seek_pagecache_data+0x2c6/0xac0 fs/bcachefs/fs-io-pagecache.c:690 bch2_clamp_data_hole+0x121/0x180 fs/bcachefs/fs-io-pagecache.c:793 __bchfs_fallocate fs/bcachefs/fs-io.c:647 [inline] bchfs_fallocate fs/bcachefs/fs-io.c:733 [inline] bch2_fallocate_dispatch+0x1a84/0x3810 fs/bcachefs/fs-io.c:780 vfs_fallocate+0x564/0x6c0 fs/open.c:330 ksys_fallocate fs/open.c:353 [inline] __do_sys_fallocate fs/open.c:361 [inline] __se_sys_fallocate fs/open.c:359 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:359 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8ff447cee9 RSP: 002b:00007f8ff52b20c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f8ff45ac050 RCX: 00007f8ff447cee9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f8ff44c949e R08: 0000000000000000 R09: 0000000000000000 R10: 00000000001000f4 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f8ff45ac050 R15: 00007ffe62ab44e8 INFO: task syz-executor.4:6293 blocked for more than 144 seconds. Not tainted 6.9.0-syzkaller-07387-g8c06da67d0bd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28656 pid:6293 tgid:6255 ppid:5481 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1796/0x4a00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6838 __bch2_two_state_lock+0x171/0x200 fs/bcachefs/two_state_shared_lock.c:7 bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:56 [inline] bch2_buffered_write fs/bcachefs/fs-io-buffered.c:1045 [inline] bch2_write_iter+0x410/0x2840 fs/bcachefs/fs-io-buffered.c:1144 call_write_iter include/linux/fs.h:2120 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa2d/0xc50 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8ff447cee9 RSP: 002b:00007f8ff52910c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f8ff45ac120 RCX: 00007f8ff447cee9 RDX: 0000000000000009 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f8ff44c949e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f8ff45ac120 R15: 00007ffe62ab44e8 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e3361e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8e3361e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8e3361e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 4 locks held by kworker/u8:9/2838: #0: ffff888015ed3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3242 [inline] #0: ffff888015ed3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x17c0 kernel/workqueue.c:3348 #1: ffffc9000a487d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3243 [inline] #1: ffffc9000a487d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x17c0 kernel/workqueue.c:3348 #2: ffffffff8f5c1a10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffffffff8f5ce3c8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe9/0xa90 net/core/dev.c:11745 2 locks held by dhcpcd/4752: #0: ffff888061cc6678 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x119/0x780 net/netlink/af_netlink.c:2418 #1: ffffffff8f5ce3c8 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0x5d3/0xe50 net/netlink/af_netlink.c:2336 2 locks held by getty/4839: #0: ffff8880785280a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201 2 locks held by syz-executor.4/6256: #0: ffff88805683be30 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:846 [inline] #0: ffff88805683be30 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: page_cache_ra_order+0x3bc/0xcc0 mm/readahead.c:510 #1: ffff888050b84250 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline] #1: ffff888050b84250 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline] #1: ffff888050b84250 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x911/0xd30 fs/bcachefs/btree_iter.c:3069 3 locks held by syz-executor.4/6292: #0: ffff8880242c2420 (sb_writers#14){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2871 [inline] #0: ffff8880242c2420 (sb_writers#14){.+.+}-{0:0}, at: vfs_fallocate+0x4d3/0x6c0 fs/open.c:329 #1: ffff88805683bc90 (&sb->s_type->i_mutex_key#22){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #1: ffff88805683bc90 (&sb->s_type->i_mutex_key#22){+.+.}-{3:3}, at: bch2_fallocate_dispatch+0x295/0x3810 fs/bcachefs/fs-io.c:771 #2: ffff888050b84250 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline] #2: ffff888050b84250 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline] #2: ffff888050b84250 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0xb1/0x220 fs/bcachefs/btree_iter.c:2896 2 locks held by syz-executor.4/6293: #0: ffff8880246754c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x259/0x320 fs/file.c:1191 #1: ffff8880242c2420 (sb_writers#14){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2871 [inline] #1: ffff8880242c2420 (sb_writers#14){.+.+}-{0:0}, at: vfs_write+0x227/0xc50 fs/read_write.c:586 1 lock held by syz-executor.1/8207: #0: ffffffff8e33b5b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #0: ffffffff8e33b5b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:939 1 lock held by syz-executor.0/8583: #0: ffffffff8f5ce3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f5ce3c8 (rtnl_mutex){+.+.}-{3:3}, at: __rtnl_newlink net/core/rtnetlink.c:3720 [inline] #0: ffffffff8f5ce3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_newlink+0xab5/0x20a0 net/core/rtnetlink.c:3743 5 locks held by syz-executor.3/8673: 2 locks held by syz-executor.4/8675: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.9.0-syzkaller-07387-g8c06da67d0bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xfde/0x1020 kernel/hung_task.c:380 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8673 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-07387-g8c06da67d0bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline] RIP: 0010:rcu_is_watching+0x3a/0xb0 kernel/rcu/tree.c:724 Code: e8 4b 7c 02 0a 89 c3 83 f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 20 7a d9 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 ac 73 7b 00 48 c7 c3 08 7d 03 00 49 03 1e 48 89 RSP: 0018:ffffc9000306f600 EFLAGS: 00000246 RAX: 1ffffffff1bb2f45 RBX: 0000000000000001 RCX: ffffffff8172f1b0 RDX: 0000000000000000 RSI: ffffffff8c1edc40 RDI: ffffffff8c1edc00 RBP: ffffc9000306f758 R08: ffffffff8fabae2f R09: 1ffffffff1f575c5 R10: dffffc0000000000 R11: fffffbfff1f575c6 R12: 1ffff9200060ded0 R13: ffffffff82010bf4 R14: ffffffff8dd97a28 R15: dffffc0000000000 FS: 00007f9c691596c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558e530978 CR3: 000000002931c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0xbf/0x9f0 kernel/locking/lockdep.c:5765 rcu_lock_release include/linux/rcupdate.h:339 [inline] rcu_read_unlock include/linux/rcupdate.h:812 [inline] percpu_ref_tryget_many include/linux/percpu-refcount.h:250 [inline] percpu_ref_tryget+0xf7/0x180 include/linux/percpu-refcount.h:266 css_tryget include/linux/cgroup_refcnt.h:45 [inline] get_mem_cgroup_from_mm+0x103/0x2a0 mm/memcontrol.c:1112 __mem_cgroup_charge+0x16/0x80 mm/memcontrol.c:7298 mem_cgroup_charge include/linux/memcontrol.h:691 [inline] shmem_alloc_and_add_folio+0x456/0xbc0 mm/shmem.c:1677 shmem_get_folio_gfp+0x82d/0x1f50 mm/shmem.c:2055 shmem_get_folio mm/shmem.c:2160 [inline] shmem_write_begin+0x170/0x4d0 mm/shmem.c:2744 generic_perform_write+0x322/0x640 mm/filemap.c:3974 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2920 call_write_iter include/linux/fs.h:2120 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa2d/0xc50 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9c6847bc2f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48 RSP: 002b:00007f9c69158e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000013bd7ef RCX: 00007f9c6847bc2f RDX: 00000000013bd7ef RSI: 00007f9c5e200000 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000551e R10: 00000000000003c8 R11: 0000000000000293 R12: 0000000000000005 R13: 00007f9c69158f80 R14: 00007f9c69158f40 R15: 00007f9c5e200000 --- 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