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INFO: task hung in __vhost_worker_flush

Status: upstream: reported on 2024/05/29 22:08
Subsystems: net virt
[Documentation on labels]
Reported-by: syzbot+7f3bbe59e8dd2328a990@syzkaller.appspotmail.com
First crash: 465d, last: 10d
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[syzbot] [kvm?] [net?] [virt?] INFO: task hung in __vhost_worker_flush 5 (7) 2025/03/27 11:21
[syzbot] Monthly virt report (Feb 2025) 0 (1) 2025/02/25 15:14
[syzbot] Monthly virt report (Jan 2025) 0 (1) 2025/01/14 08:53
[syzbot] Monthly kvm report (Jul 2024) 0 (1) 2024/07/22 21:16
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-12 INFO: task hung in __vhost_worker_flush 1 1 59d 59d 0/1 premoderation: reported on 2025/06/19 18:41

Sample crash report:
INFO: task syz.1.1776:11740 blocked for more than 161 seconds.
      Not tainted 6.16.0-syzkaller-12063-g37816488247d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1776      state:D stack:26264 pid:11740 tgid:11740 ppid:5846   task_flags:0x400040 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7058
 schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:100 [inline]
 __wait_for_common+0x2fc/0x4e0 kernel/sched/completion.c:121
 __vhost_worker_flush+0x1a8/0x1d0 drivers/vhost/vhost.c:296
 vhost_worker_flush drivers/vhost/vhost.c:303 [inline]
 vhost_dev_flush+0xac/0x110 drivers/vhost/vhost.c:313
 vhost_net_flush+0x1d/0x1b0 drivers/vhost/net.c:1406
 vhost_net_release+0xa2/0x260 drivers/vhost/net.c:1427

Crashes (332):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/08 15:47 upstream 37816488247d 987b750d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2025/06/11 23:13 upstream 488ef3560196 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2025/06/09 09:48 upstream 939f15e640f1 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2025/05/03 20:41 upstream 95d3481af6dc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in __vhost_worker_flush
2025/03/25 11:55 upstream 327ecdbc0fda 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2025/01/10 05:23 upstream 643e2e259c2b 40f46913 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2024/11/09 14:46 upstream da4373fbcf00 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2024/11/05 11:34 upstream 2e1b3cc9d7f7 509da429 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2024/11/04 02:12 upstream b9021de3ec2f f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in __vhost_worker_flush
2024/10/25 09:49 upstream ae90f6a6170d c79b8ca5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2024/10/13 18:22 upstream ba01565ced22 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in __vhost_worker_flush
2024/09/27 16:26 upstream 075dbe9f6e3c 2b1784d6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in __vhost_worker_flush
2024/09/25 03:55 upstream 97d8894b6f4c 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in __vhost_worker_flush
2024/09/25 01:47 upstream 97d8894b6f4c 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in __vhost_worker_flush
2024/09/25 01:40 upstream 97d8894b6f4c 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in __vhost_worker_flush
2024/09/25 00:26 upstream a430d95c5efa 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2024/09/01 20:32 upstream 431c1646e1f8 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2024/08/17 16:04 upstream e5fa841af679 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/05/26 06:33 upstream 9b62e02e6336 a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in __vhost_worker_flush
2024/05/25 20:10 upstream 56fb6f92854f a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in __vhost_worker_flush
2024/10/11 19:47 upstream 1d227fcc7222 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in __vhost_worker_flush
2024/10/10 20:18 upstream d3d1556696c1 8fbfc0c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in __vhost_worker_flush
2024/09/27 22:24 upstream 075dbe9f6e3c 2b1784d6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64 INFO: task hung in __vhost_worker_flush
2024/09/27 22:23 upstream 075dbe9f6e3c 2b1784d6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64 INFO: task hung in __vhost_worker_flush
2024/05/25 18:40 upstream 56fb6f92854f a10a183e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 INFO: task hung in __vhost_worker_flush
2025/02/14 01:08 linux-next 7b7a883c7f4d d9a046cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/10/02 18:40 linux-next fe2173353674 a4c7fd36 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/10/02 10:06 linux-next fe2173353674 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/10/01 19:31 linux-next 77df9e4bb222 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/10/01 19:30 linux-next 77df9e4bb222 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/10/01 10:32 linux-next 77df9e4bb222 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/30 20:02 linux-next cea5425829f7 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/30 10:05 linux-next cea5425829f7 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/28 21:14 linux-next 40e0c9d414f5 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/28 07:25 linux-next 40e0c9d414f5 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/27 20:03 linux-next 40e0c9d414f5 2b1784d6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/27 07:12 linux-next 92fc9636d147 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/26 11:20 linux-next 92fc9636d147 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/25 09:35 linux-next 2b7275670032 349a68c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/24 20:53 linux-next 4d0326b60bb7 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/24 17:31 linux-next 4d0326b60bb7 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/09/24 11:20 linux-next 4d0326b60bb7 89298aad .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/08/19 17:15 linux-next 367b5c3d53e5 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/08/17 14:40 linux-next 367b5c3d53e5 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/08/17 14:39 linux-next 367b5c3d53e5 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/08/16 07:46 linux-next 367b5c3d53e5 e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/08/15 08:42 linux-next edd1ec2e3a9f e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/08/15 00:48 linux-next 320eb81df4f6 e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/05/10 14:50 linux-next 75fa778d74b7 f7c35481 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in __vhost_worker_flush
2024/12/14 09:33 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 21f1b85c8912 7cbfbb3a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 INFO: task hung in __vhost_worker_flush
2024/12/13 23:26 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 21f1b85c8912 7d3b55db .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 INFO: task hung in __vhost_worker_flush
2024/10/26 08:03 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 5f153a692bac 65e8686b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 INFO: task hung in __vhost_worker_flush
2024/10/23 12:26 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes c05ad457ce8c 15fa2979 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 INFO: task hung in __vhost_worker_flush
2024/10/17 05:47 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes cfb10de18538 666f77ed .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 INFO: task hung in __vhost_worker_flush
* Struck through repros no longer work on HEAD.