INFO: task hung in nfsd_nl_expkey_set_reqs_doit

Status: upstream: reported on 2026/07/22 19:43
Subsystems: nfs
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+de7e55e90abcbb58ae63@syzkaller.appspotmail.com
First crash: 51d, last: 15h42m
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ID Workflow Result Correct Bug Created Started Finished Revision
7267bc74 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: task hung in nfsd_nl_expkey_set_reqs_doit 2026/06/24 00:01 2026/06/24 00:01 2026/06/24 01:01 e30e5c89
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[syzbot] [nfs?] INFO: task hung in nfsd_nl_expkey_set_reqs_doit 0 (1) 2026/07/22 19:43

Sample crash report:
INFO: task syz.8.12599:2590 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.12599     state:D stack:27200 pid:2590  tgid:2589  ppid:1319   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7326
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821
 nfsd_nl_expkey_set_reqs_doit+0xfe/0xaf0 fs/nfsd/export.c:561
 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556

Crashes (60):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/11 16:39 upstream f5bbbfec59b4 37a258dd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/28 06:47 upstream 62cc90241548 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/13 22:39 upstream 0f26556c5eee 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/06/22 03:34 upstream 8cd8cf7a07e5 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/08/11 19:37 net b37971686ec5 37a258dd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/08/11 05:26 net cef51860becd 039457bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/08/04 11:23 net d1ad8fb2ac6a a68cb31b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/27 23:42 net 53658c6f3682 4cb2b096 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/26 13:38 net 53658c6f3682 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/25 13:33 net 53658c6f3682 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/24 09:56 net 78f75d632f74 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/23 20:27 net f43ee0c0730d 71a13572 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/22 11:58 net ba712ecfd942 b561ce9c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/21 19:28 net 96e37e2f618e 7c5de9c3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/21 08:39 net 1c975de3343c de6a700d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/16 20:39 net 3f1f75536668 8f30cfd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/06 23:15 net a0a558ca7e75 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/06 19:56 net a0a558ca7e75 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/06 16:24 net a0a558ca7e75 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/06 15:27 net a0a558ca7e75 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/06 12:24 net a0a558ca7e75 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/08/02 22:33 net-next 69963a0678a3 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/29 16:20 net-next 2bb54b49e9d5 cb1587ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/29 15:18 net-next 2bb54b49e9d5 cb1587ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/21 06:53 net-next e354f7d60f14 de6a700d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/20 07:54 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/20 03:09 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/20 02:33 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/20 02:23 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/20 01:58 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/19 20:04 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/19 16:37 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/19 11:16 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/19 03:49 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 23:59 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 22:05 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 19:24 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 16:28 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 15:48 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 10:49 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 08:48 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 08:08 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 08:00 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 05:25 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 02:45 net-next ce6b4d3216b6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 00:03 net-next 5c655dfd9823 7f27c57a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/13 00:25 net-next f6f3b36c15ed d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/12 18:49 net-next f6f3b36c15ed d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/08 08:16 net-next 4a13f31a92f3 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/05 05:37 net-next b73bc9ca3686 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/18 03:29 linux-next cc2b5f627e8c 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/16 00:23 linux-next cc2b5f627e8c 27a8bd60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/15 20:13 linux-next cc2b5f627e8c 209f0369 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/14 08:23 linux-next 49362394dad7 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/12 13:00 linux-next bee763d5f341 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/12 06:59 linux-next bee763d5f341 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/12 06:54 linux-next bee763d5f341 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in nfsd_nl_expkey_set_reqs_doit
2026/07/09 07:59 linux-next b9810cd75b9f b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_set_reqs_doit
* Struck through repros no longer work on HEAD.