invalid opcode in svc_destroy

Status: upstream: reported on 2026/08/04 18:23
Reported-by: syzbot+1130eee716b83e13170b@syzkaller.appspotmail.com
First crash: 18d, last: 18d
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 invalid opcode in svc_destroy 2 3 18d 18d 0/3 upstream: reported on 2026/08/04 21:46

Sample crash report:
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5002 Comm: syz.5.74 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:svc_destroy+0x184/0x190 net/sunrpc/svc.c:572
Code: 5f 5d e9 ef ae c3 f8 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 24 ff ff ff 4c 89 ff e8 56 43 c4 f8 e9 17 ff ff ff e8 9c 20 7f f8 <0f> 0b e8 95 20 7f f8 0f 0b 0f 1f 00 55 41 57 41 56 41 55 41 54 53
RSP: 0018:ffffc9000313faa0 EFLAGS: 00010283
RAX: ffffffff88f9dc14 RBX: ffff888077a03c50 RCX: 0000000000080000
RDX: ffffc90004051000 RSI: 000000000002b2c3 RDI: 000000000002b2c4
RBP: 0000000000000001 R08: ffffffff901ee1f7 R09: 1ffffffff203dc3e
R10: dffffc0000000000 R11: fffffbfff203dc3f R12: dffffc0000000000
R13: ffff8880680d0000 R14: ffff888077a03c68 R15: ffff888079903500
FS:  00007faae926b6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555d92ea78 CR3: 0000000062fae000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kref_put include/linux/kref.h:65 [inline]
 svc_put include/linux/sunrpc/svc.h:123 [inline]
 nfsd_svc+0x7cf/0x9e0 fs/nfsd/nfssvc.c:821
 write_threads+0x2ea/0x350 fs/nfsd/nfsctl.c:426
 nfsctl_transaction_write+0x105/0x150 fs/nfsd/nfsctl.c:114
 vfs_write+0x304/0xd70 fs/read_write.c:592
 ksys_write+0x153/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7faaeb013019
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:00007faae926b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007faaeb29afa0 RCX: 00007faaeb013019
RDX: 0000000000000002 RSI: 0000200000000140 RDI: 0000000000000007
RBP: 00007faaeb0aa00c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faaeb29b038 R14: 00007faaeb29afa0 R15: 00007ffdb7d058d8
 </TASK>
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace efaf59f538bc98cc ]---
RIP: 0010:svc_destroy+0x184/0x190 net/sunrpc/svc.c:572
Code: 5f 5d e9 ef ae c3 f8 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 24 ff ff ff 4c 89 ff e8 56 43 c4 f8 e9 17 ff ff ff e8 9c 20 7f f8 <0f> 0b e8 95 20 7f f8 0f 0b 0f 1f 00 55 41 57 41 56 41 55 41 54 53
RSP: 0018:ffffc9000313faa0 EFLAGS: 00010283
RAX: ffffffff88f9dc14 RBX: ffff888077a03c50 RCX: 0000000000080000
RDX: ffffc90004051000 RSI: 000000000002b2c3 RDI: 000000000002b2c4
RBP: 0000000000000001 R08: ffffffff901ee1f7 R09: 1ffffffff203dc3e
R10: dffffc0000000000 R11: fffffbfff203dc3f R12: dffffc0000000000
R13: ffff8880680d0000 R14: ffff888077a03c68 R15: ffff888079903500
FS:  00007faae926b6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff722557ff8 CR3: 0000000062fae000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (32):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/05 02:31 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 02:25 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 02:11 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 01:47 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 01:45 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 01:15 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 00:59 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 00:58 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 00:12 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 00:12 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/05 00:00 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 23:56 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 23:50 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 23:47 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 23:26 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 23:23 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 23:22 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 23:03 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 22:19 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 21:54 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 20:51 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 20:50 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 20:50 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 20:37 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 20:37 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 20:31 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 19:54 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 18:38 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 18:32 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 18:26 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 18:23 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
2026/08/04 18:23 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan invalid opcode in svc_destroy
* Struck through repros no longer work on HEAD.