syzbot


SYZFAIL: SIGILL (2)

Status: upstream: reported syz repro on 2025/12/08 03:30
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+d8bffec8702bda90392a@syzkaller.appspotmail.com
First crash: 39d, last: 2h22m
Bug presence (1)
Date Name Commit Repro Result
2025/12/10 upstream (ToT) 2137cb863b80 syz [report] lost connection to test machine
Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 SYZFAIL: SIGILL (3) -1 1 27d 27d 0/2 premoderation: reported on 2025/12/20 03:30
android-6-1 SYZFAIL: SIGILL (4) origin:upstream -1 syz 9 8d16h 54d 0/2 premoderation: reported syz repro on 2025/11/22 17:00
android-6-1 SYZFAIL: SIGILL (3) -1 4 165d 249d 0/2 auto-obsoleted due to no activity on 2025/11/01 21:09
android-5-15 SYZFAIL: SIGILL -1 1 547d 547d 0/2 auto-obsoleted due to no activity on 2024/10/15 20:58
linux-6.1 SYZFAIL: SIGILL -1 1 269d 269d 0/3 auto-obsoleted due to no activity on 2025/07/30 15:44
android-5-10 SYZFAIL: SIGILL -1 9 3h58m 336d 0/2 premoderation: reported on 2025/02/14 06:19
android-6-1 SYZFAIL: SIGILL (2) -1 1 411d 411d 0/2 auto-obsoleted due to no activity on 2025/02/28 17:25
linux-6.6 SYZFAIL: SIGILL -1 syz 1 1d23h 1d23h 0/2 upstream: reported syz repro on 2026/01/14 07:31
android-5-15 SYZFAIL: SIGILL (2) -1 1 257d 257d 0/2 auto-obsoleted due to no activity on 2025/08/01 23:52
android-6-1 SYZFAIL: SIGILL -1 3 547d 547d 0/2 auto-obsoleted due to no activity on 2024/10/15 20:47

Sample crash report:
SYZFAIL: SIGILL
pc-offset:0xffffffffffec0dc3 pc:0x7fe92378e11d addr:(nil) code=128 (errno 9: Bad file descriptor)
SIGILL: illegal instruction
PC=0x40dd0e m=4 sigcode=128
instruction bytes: 0x48 0x3d 0x1 0xf0 0xff 0xff 0x76 0x15 0x48 0xf7 0xd8 0x48 0x89 0xc1 0x48 0xc7

goroutine 9 gp=0xc00405ae00 m=4 mp=0xc00007f808 [syscall]:
syscall.Syscall(0x1, 0x6, 0xc0002d31d0, 0x230)
	/usr/local/go/src/syscall/syscall_linux.go:73 +0x25 fp=0xc0000a5498 sp=0xc0000a5438 pc=0x4a7925
syscall.write(0xc003734000?, {0xc0002d31d0?, 0xc0000a5500?, 0xfabba5?})
	/usr/local/go/src/syscall/zsyscall_linux_amd64.go:964 +0x3b fp=0xc0000a54d8 sp=0xc0000a5498 pc=0x4a5cbb
syscall.Write(...)
	/usr/local/go/src/syscall/syscall_unix.go:211
internal/poll.ignoringEINTRIO(...)
	/usr/local/go/src/internal/poll/fd_unix.go:745
internal/poll.(*FD).Write(0xc003734000, {0xc0002d31d0, 0x230, 0x230})
	/usr/local/go/src/internal/poll/fd_unix.go:381 +0x394 fp=0xc0000a55c0 sp=0xc0000a54d8 pc=0x500b94
net.(*netFD).Write(0xc003734000, {0xc0002d31d0?, 0x8?, 0xc0000a5640?})
	/usr/local/go/src/net/fd_posix.go:96 +0x25 fp=0xc0000a5608 sp=0xc0000a55c0 pc=0x66bcc5
net.(*conn).Write(0xc0039d20c0, {0xc0002d31d0?, 0x7f85abed5180?, 0x7f85f2df25c0?})
	/usr/local/go/src/net/net.go:206 +0x45 fp=0xc0000a5650 sp=0xc0000a5608 pc=0x67b005
github.com/google/syzkaller/pkg/flatrpc.Send[...](0xc0026655e0, 0xc000127710)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/flatrpc/conn.go:123 +0x109 fp=0xc0000a56f0 sp=0xc0000a5650 pc=0x127c189
github.com/google/syzkaller/pkg/rpcserver.(*Runner).sendRequest(0xc002654600, 0xc0026db380)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/runner.go:347 +0x545 fp=0xc0000a57e8 sp=0xc0000a56f0 pc=0x1279745
github.com/google/syzkaller/pkg/rpcserver.(*Runner).ConnectionLoop(0xc002654600)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/runner.go:182 +0x53e fp=0xc0000a59d0 sp=0xc0000a57e8 pc=0x1278a5e
github.com/google/syzkaller/pkg/rpcserver.(*server).connectionLoop(0xc001325320, {0x235ffb0?, 0xc002665590?}, 0xc002654600)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:439 +0x196 fp=0xc0000a5b08 sp=0xc0000a59d0 pc=0x1275d16
github.com/google/syzkaller/pkg/rpcserver.(*server).handleRunnerConn(0xc001325320, {0x235ffb0, 0xc002665590}, 0xc002654600, 0xc0026655e0)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:362 +0x54a fp=0xc0000a5d50 sp=0xc0000a5b08 pc=0x12752aa
github.com/google/syzkaller/pkg/rpcserver.(*server).handleConn(0xc001325320, {0x235ffb0, 0xc002665590}, 0xc0026655e0)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:324 +0x2aa fp=0xc0000a5e88 sp=0xc0000a5d50 pc=0x1274a0a
github.com/google/syzkaller/pkg/rpcserver.(*server).Serve.func1.1({0x235ffb0?, 0xc002665590?}, 0xc0025303c0?)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:244 +0x31 fp=0xc0000a5ef8 sp=0xc0000a5e88 pc=0x1274671
github.com/google/syzkaller/pkg/flatrpc.(*Serv).Serve.func2()
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/flatrpc/conn.go:78 +0x198 fp=0xc0000a5f78 sp=0xc0000a5ef8 pc=0xfaf958
golang.org/x/sync/errgroup.(*Group).Go.func1()
	/syzkaller/gopath/pkg/mod/golang.org/x/sync@v0.17.0/errgroup/errgroup.go:93 +0x50 fp=0xc0000a5fe0 sp=0xc0000a5f78 pc=0xfae730
runtime.goexit({})
	/usr/local/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc0000a5fe8 sp=0xc0000a5fe0 pc=0x47e281
created by golang.org/x/sync/errgroup.(*Group).Go in goroutine 29
	/syzkaller/gopath/pkg/mod/golang.org/x/sync@v0.17.0/errgroup/errgroup.go:78 +0x93

goroutine 1 gp=0xc000002380 m=nil [sync.WaitGroup.Wait]:
runtime.gopark(0xc0000a5c98?, 0x419274?, 0x0?, 0x98?, 0x7f85abfffd58?)
	/usr/local/go/src/runtime/proc.go:435 +0xce fp=0xc0026ffc38 sp=0xc0026ffc18 pc=0x47666e
Connection to 10.128.0.219 closed by remote host.

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/16 04:51 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf SYZFAIL: SIGILL
2025/12/08 03:30 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf SYZFAIL: SIGILL
2025/12/13 15:35 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan SYZFAIL: SIGILL
* Struck through repros no longer work on HEAD.