INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit

Status: upstream: reported on 2026/07/22 19:54
Subsystems: nfs
Labels: prio:normal
[Documentation on labels]
Reported-by: syzbot+16f257c80900b615cb35@syzkaller.appspotmail.com
First crash: 79d, last: 1h41m
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ID Workflow Result Correct Bug Created Started Finished Revision
87a02a73 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit 2026/06/23 00:00 2026/06/23 00:00 2026/06/23 00:53 5a630be6
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[syzbot] [nfs?] INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit 0 (1) 2026/07/22 19:54

Sample crash report:
INFO: task syz.1.1664:16391 blocked for more than 144 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1664      state:D stack:26664 pid:16391 tgid:16390 ppid:15746  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x16d9/0x5700 kernel/sched/core.c:7270
 __schedule_loop kernel/sched/core.c:7347 [inline]
 rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7643
 rt_mutex_slowlock_block+0x55e/0x690 kernel/locking/rtmutex.c:1670
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1747 [inline]
 __rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1787 [inline]
 rt_mutex_slowlock+0x2d4/0x780 kernel/locking/rtmutex.c:1827
 __rt_mutex_lock kernel/locking/rtmutex.c:1842 [inline]
 __mutex_lock_common kernel/locking/rtmutex_api.c:560 [inline]
 mutex_lock_nested+0x168/0x1d0 kernel/locking/rtmutex_api.c:578
 nfsd_nl_expkey_get_reqs_dumpit+0xfd/0xd40 fs/nfsd/export.c:347
 genl_dumpit+0x10b/0x1b0 net/netlink/genetlink.c:1026
 netlink_dump+0x711/0xee0 net/netlink/af_netlink.c:2331

Crashes (70):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/26 11:00 upstream 73ae59e97596 6a91adb4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/12 10:50 upstream f5bbbfec59b4 f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/11 20:50 upstream d58772d8520c 37a258dd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/18 12:25 upstream af5e34a41cd6 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/08 01:21 upstream 0e35b9b6ec0f 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/06 19:29 upstream 8cdeaa50eae8 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/06/21 13:01 upstream 390d73adf896 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/06/21 12:14 upstream 390d73adf896 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/09/09 06:05 net ba4ba11ed6eb 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/09/08 21:09 net e0554c6276da 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/09/08 19:12 net e0554c6276da 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/09/08 17:47 net e0554c6276da 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/09/06 19:56 net 38b6be101006 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/11 14:57 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_get_reqs_dumpit
2026/08/11 04:34 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_get_reqs_dumpit
2026/07/29 14:02 net 3bd438a58e91 cb1587ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/22 10:26 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_get_reqs_dumpit
2026/07/06 17:43 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_get_reqs_dumpit
2026/07/06 17:35 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_get_reqs_dumpit
2026/07/06 13:46 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_get_reqs_dumpit
2026/07/01 01:38 net 2a00517db8de 00e8b0fd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/09/03 05:38 net-next d0ec95a8a4e7 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/23 21:21 net-next 91ec20351349 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/23 16:27 net-next 91ec20351349 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/23 14:40 net-next 91ec20351349 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/23 01:34 net-next 91ec20351349 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/11 17:32 net-next b54074ffb813 37a258dd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/22 15:24 net-next df13c1df8147 b561ce9c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/20 08:35 net-next 298bb2b89033 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/20 07:13 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_get_reqs_dumpit
2026/07/20 04:11 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_get_reqs_dumpit
2026/07/20 02:26 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_get_reqs_dumpit
2026/07/20 01:09 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_get_reqs_dumpit
2026/07/20 00:06 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_get_reqs_dumpit
2026/07/19 22:16 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_get_reqs_dumpit
2026/07/19 18:52 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_get_reqs_dumpit
2026/07/19 16:00 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_get_reqs_dumpit
2026/07/19 15:24 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_get_reqs_dumpit
2026/07/19 14:44 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_get_reqs_dumpit
2026/07/19 12:01 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_get_reqs_dumpit
2026/07/19 10:58 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_get_reqs_dumpit
2026/07/19 09:15 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_get_reqs_dumpit
2026/07/19 04:29 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_get_reqs_dumpit
2026/07/19 03:43 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_get_reqs_dumpit
2026/07/19 00:45 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_get_reqs_dumpit
2026/07/18 19:41 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_get_reqs_dumpit
2026/07/18 16:57 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_get_reqs_dumpit
2026/07/18 13:31 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_get_reqs_dumpit
2026/07/18 12:55 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_get_reqs_dumpit
2026/07/18 12:23 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_get_reqs_dumpit
2026/07/18 11:08 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_get_reqs_dumpit
2026/07/18 10:57 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_get_reqs_dumpit
2026/07/18 06:35 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_get_reqs_dumpit
2026/07/18 04:26 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_get_reqs_dumpit
2026/07/18 04:21 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_get_reqs_dumpit
2026/07/15 07:43 net-next f6f3b36c15ed 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/15 06:38 net-next f6f3b36c15ed 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/15 06:32 net-next f6f3b36c15ed 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/15 05:43 net-next f6f3b36c15ed 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/15 03:34 net-next f6f3b36c15ed 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/14 21:51 net-next f6f3b36c15ed 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/14 09:52 net-next f6f3b36c15ed 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/12 15:35 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_get_reqs_dumpit
2026/07/12 12:19 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_get_reqs_dumpit
2026/07/12 10:42 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_get_reqs_dumpit
2026/08/19 17:08 linux-next 6a746cd265ae 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/08/08 12:43 linux-next cc2b5f627e8c 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
2026/07/13 09:13 linux-next bee763d5f341 a870962e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in nfsd_nl_expkey_get_reqs_dumpit
* Struck through repros no longer work on HEAD.