go runtime error

Status: upstream: reported syz repro on 2025/08/30 21:34
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+1c70fca55f49e85636ee@syzkaller.appspotmail.com
First crash: 337d, last: 196d
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2026/01/19 linux-6.1.y (ToT) cd9b81672742 syz [report] go runtime error
2025/08/31 upstream (ToT) c8bc81a52d5a syz [report] lost connection to test machine
2026/01/19 upstream (ToT) 24d479d26b25 syz Didn't crash
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 go runtime error 2 syz, C 1 2d03h 2d03h 0/2 upstream: reported C repro on 2026/08/01 16:56
linux-5.15 go runtime error origin:upstream 2 syz error 1 941d 1066d 0/3 auto-obsoleted due to no activity on 2024/04/14 05:34
android-6-1 go runtime error origin:upstream 2 syz error inconclusive 25 106d 996d 0/2 premoderation: reported syz repro on 2023/11/11 09:24
android-5-10 go runtime error 2 22 820d 1099d 0/2 auto-obsoleted due to no activity on 2024/08/02 23:33
android-54 go runtime error 2 4 806d 862d 0/2 auto-obsoleted due to no activity on 2024/08/17 11:44
android-5-15 go runtime error origin:downstream 2 syz error 9 321d 1104d 0/2 premoderation: reported syz repro on 2023/07/26 19:25
upstream go runtime error fs 2 syz error inconclusive 24 92d 984d 0/29 closed as invalid on 2026/07/20 12:15
upstream go runtime error (2) prio:low 2 syz 1 4d11h 11h04m 0/29 closed as invalid on 2026/08/03 09:54
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2026/06/11 03:33 2h17m fix candidate upstream OK (0) job log
2026/05/07 15:36 17m fix candidate upstream error job log
2026/03/24 21:07 1m fix candidate upstream error job log
2026/02/22 18:43 1m fix candidate upstream error job log
2026/01/23 00:56 1m fix candidate upstream error job log

Sample crash report:
fatal error: panic while printing panic value: type runtime.errorString
[signal SIGFPE: floating-point exception code=0x80 addr=0x0 pc=0x4158e8]

goroutine 24 gp=0xc002d2c1c0 m=3 mp=0xc00007f008 [running]:
runtime.throw({0xc002d2a780?, 0x17b4a64?})
	/usr/local/go/src/runtime/panic.go:1101 +0x48 fp=0xc002d42cc0 sp=0xc002d42c90 pc=0x476548
runtime.preprintpanics.func1()
	/usr/local/go/src/runtime/panic.go:653 +0xbc fp=0xc002d42d58 sp=0xc002d42cc0 pc=0x47167c
panic({0x1488240?, 0x3103600?})
	/usr/local/go/src/runtime/panic.go:792 +0x132 fp=0xc002d42e08 sp=0xc002d42d58 pc=0x476152
runtime.panicfloat(...)
	/usr/local/go/src/runtime/panic.go:255
runtime.sigpanic()
	/usr/local/go/src/runtime/signal_unix.go:947 +0x189 fp=0xc002d42e68 sp=0xc002d42e08 pc=0x478469
runtime.(*itabTableType).find(Connection to 10.128.1.101 closed by remote host.

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/25 20:19 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf go runtime error
2025/09/08 03:32 linux-6.1.y 28c695c365e1 d291dd2d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf go runtime error
2025/08/30 21:34 linux-6.1.y f89b6e15694c 807a3b61 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf go runtime error
* Struck through repros no longer work on HEAD.