WARNING in svc_destroy

Status: upstream: reported C repro on 2026/07/27 20:31
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+1c6b5b08237026b4cbae@syzkaller.appspotmail.com
First crash: 60d, last: 2d23h
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/08/08 linux-6.6.y (ToT) 6436c12a2ced C [report] WARNING in svc_destroy
2026/08/08 upstream (ToT) a59f57e2aa12 C Didn't crash

Sample crash report:
------------[ cut here ]------------
SVC: permsocks remain for nfsd
WARNING: CPU: 0 PID: 5941 at net/sunrpc/svc.c:645 svc_destroy+0x2ed/0x390 net/sunrpc/svc.c:644
Modules linked in:
CPU: 0 PID: 5941 Comm: syz.0.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:svc_destroy+0x2ed/0x390 net/sunrpc/svc.c:644
Code: 24 49 83 c7 20 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 f2 d1 31 f8 49 8b 37 48 c7 c7 e0 87 d9 8b e8 c3 09 a3 f7 <0f> 0b e9 78 fd ff ff e8 b7 45 d9 f7 c6 05 73 72 c8 04 01 4c 89 e0
RSP: 0018:ffffc900033cfae0 EFLAGS: 00010246
RAX: 65f1b7f480349200 RBX: ffff88802b5ea850 RCX: ffff88802df65a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc900033cfcb8 R08: ffff8880b8e28c53 R09: 1ffff110171c518a
R10: dffffc0000000000 R11: ffffed10171c518b R12: ffff88802b5ea800
R13: dffffc0000000000 R14: ffff88802b5ea850 R15: ffffffff8d3e1e40
FS:  00005555725bc500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5a3b070050 CR3: 000000007e4a8000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 kref_put include/linux/kref.h:65 [inline]
 svc_put include/linux/sunrpc/svc.h:124 [inline]
 __write_ports_addxprt fs/nfsd/nfsctl.c:765 [inline]
 __write_ports fs/nfsd/nfsctl.c:791 [inline]
 write_ports+0xb99/0xfa0 fs/nfsd/nfsctl.c:844
 nfsctl_transaction_write+0x10c/0x150 fs/nfsd/nfsctl.c:113
 vfs_write+0x299/0x9a0 fs/read_write.c:582
 ksys_write+0x151/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5a3b19e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe15f10378 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5a3b425fa0 RCX: 00007f5a3b19e159
RDX: 0000000000000005 RSI: 0000200000000140 RDI: 0000000000000003
RBP: 00007f5a3b23506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a3b425fac R14: 00007f5a3b425fa0 R15: 00007f5a3b425fa0
 </TASK>

Crashes (323):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/19 09:57 linux-6.6.y 79643295eba1 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/19 03:35 linux-6.6.y 79643295eba1 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/19 00:05 linux-6.6.y 79643295eba1 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/15 12:42 linux-6.6.y 79643295eba1 81a27d1a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/15 12:19 linux-6.6.y 79643295eba1 81a27d1a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/15 08:01 linux-6.6.y 79643295eba1 81a27d1a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/11 02:33 linux-6.6.y 8b73de7da85f 1fe56c0a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/10 23:14 linux-6.6.y 8b73de7da85f 1fe56c0a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/08 02:44 linux-6.6.y 8b73de7da85f 680aa3e1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/05 20:13 linux-6.6.y 8b73de7da85f 4f7b22a0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/05 16:55 linux-6.6.y 8b73de7da85f 4f7b22a0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/27 09:13 linux-6.6.y dc6160265ffc a2b77b9e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/27 07:08 linux-6.6.y dc6160265ffc a2b77b9e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/27 05:11 linux-6.6.y dc6160265ffc a2b77b9e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/27 03:05 linux-6.6.y dc6160265ffc a2b77b9e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/27 01:47 linux-6.6.y dc6160265ffc a2b77b9e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/27 00:29 linux-6.6.y dc6160265ffc a2b77b9e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/22 19:01 linux-6.6.y c610b395b0a5 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/22 14:39 linux-6.6.y c610b395b0a5 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/21 18:59 linux-6.6.y c610b395b0a5 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/20 06:14 linux-6.6.y c610b395b0a5 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/19 01:56 linux-6.6.y d27334b2888c 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/16 13:48 linux-6.6.y d27334b2888c 746171ee .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/08 03:18 linux-6.6.y 6436c12a2ced e4ef95d6 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/08 00:30 linux-6.6.y 6436c12a2ced e4ef95d6 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/06 08:42 linux-6.6.y aa0e49877a2e cd5b1963 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/03 09:00 linux-6.6.y a1153c0deb44 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/03 03:13 linux-6.6.y a1153c0deb44 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/02 23:29 linux-6.6.y a1153c0deb44 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/02 19:13 linux-6.6.y a1153c0deb44 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/02 18:30 linux-6.6.y a1153c0deb44 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/02 12:54 linux-6.6.y a1153c0deb44 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/02 10:29 linux-6.6.y a1153c0deb44 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/31 14:42 linux-6.6.y a4a971135a2f 2f52988a .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/23 13:22 linux-6.6.y 79643295eba1 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/23 05:10 linux-6.6.y 79643295eba1 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/23 05:08 linux-6.6.y 79643295eba1 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/22 15:45 linux-6.6.y 79643295eba1 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/22 15:21 linux-6.6.y 79643295eba1 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/22 14:22 linux-6.6.y 79643295eba1 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/22 14:14 linux-6.6.y 79643295eba1 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/21 18:58 linux-6.6.y 79643295eba1 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/19 07:03 linux-6.6.y 79643295eba1 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/18 14:39 linux-6.6.y 79643295eba1 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/18 06:06 linux-6.6.y 79643295eba1 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/18 01:27 linux-6.6.y 79643295eba1 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/18 00:59 linux-6.6.y 79643295eba1 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/17 08:51 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/17 08:50 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/15 02:10 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/15 00:55 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/15 00:41 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/14 17:19 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/13 23:54 linux-6.6.y 8b73de7da85f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/12 23:20 linux-6.6.y 8b73de7da85f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/11 19:25 linux-6.6.y 8b73de7da85f b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/10 20:02 linux-6.6.y 8b73de7da85f 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/10 18:31 linux-6.6.y 8b73de7da85f 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/10 17:17 linux-6.6.y 8b73de7da85f 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/07 23:11 linux-6.6.y 8b73de7da85f 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/05 18:03 linux-6.6.y 8b73de7da85f 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/04 07:29 linux-6.6.y 8b73de7da85f 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/04 06:10 linux-6.6.y 8b73de7da85f 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/04 02:34 linux-6.6.y 8b73de7da85f 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/03 17:15 linux-6.6.y 8b73de7da85f 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/03 02:16 linux-6.6.y 8b73de7da85f 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/02 17:07 linux-6.6.y 8b73de7da85f 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/02 07:04 linux-6.6.y a4a971135a2f 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/01 08:57 linux-6.6.y a4a971135a2f 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/09/01 08:54 linux-6.6.y a4a971135a2f 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/31 11:59 linux-6.6.y a4a971135a2f 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/31 06:10 linux-6.6.y a4a971135a2f 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/29 03:28 linux-6.6.y a4a971135a2f 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/27 22:24 linux-6.6.y 93e0c9521fa8 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/25 10:00 linux-6.6.y dc6160265ffc 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/25 10:00 linux-6.6.y dc6160265ffc 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/08/24 07:05 linux-6.6.y dc6160265ffc 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
2026/07/27 20:30 linux-6.6.y c5596480c50e aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in svc_destroy
* Struck through repros no longer work on HEAD.