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panic: runtime error: floating point error [recovered] (2)

Status: upstream: reported syz repro on 2024/12/22 14:57
Reported-by: syzbot+4fb57f15e8c895a21973@syzkaller.appspotmail.com
First crash: 577d, last: 493d
▶ ▼ ✨ AI Jobs (6)
ID Workflow Result Correct Bug Created Started Finished Revision Error
4374ddae-5107-4770-8542-18325b9288f9 assessment-security 💥 panic: runtime error: floating point error [recovered] (2) 2026/07/08 01:08 2026/07/08 01:08 2026/07/08 01:36 93f579545ae410f5bccfa141d2e7bf03178f036c 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/82afa5da2ae55d713e...
truncated to first 200 bytes; open job for full error
3ed8fad6-a5aa-429e-800c-d38047e13116 assessment-security 💥 panic: runtime error: floating point error [recovered] (2) 2026/06/22 01:04 2026/06/22 01:04 2026/06/22 01:33 43bfcdb07c3552e4664e1029672054ac0924d543 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/82afa5da2ae55d713e...
truncated to first 200 bytes; open job for full error
967fc3ee-09f8-4fb0-8375-182bf798ee8a assessment-security 💥 panic: runtime error: floating point error [recovered] (2) 2026/06/14 00:53 2026/06/14 00:53 2026/06/14 01:19 4f06757f683a802254a4c8edbfe67ff801904c5e 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/82afa5da2ae55d713e...
truncated to first 200 bytes; open job for full error
95957c00-c57a-4a4a-b825-00b4fec6024f assessment-security 💥 panic: runtime error: floating point error [recovered] (2) 2026/06/09 15:38 2026/06/09 15:38 2026/06/09 16:01 c36c07f6c1f2230a36374cbd22235f635e8f9284 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/82afa5da2ae55d713e...
truncated to first 200 bytes; open job for full error
fb83752c-0e8e-4d9e-a6b0-86e33541f1a7 assessment-security 💥 panic: runtime error: floating point error [recovered] (2) 2026/06/02 10:26 2026/06/02 10:26 2026/06/02 10:56 1095583bae1d2729a3b4be301cb6ddc85ced9e38 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/82afa5da2ae55d713e...
truncated to first 200 bytes; open job for full error
6240c1e2-b418-40fd-a238-c1e7f95f33b9 assessment-security 💥 panic: runtime error: floating point error [recovered] (2) 2026/05/24 01:25 2026/05/24 01:25 2026/05/24 01:55 c69befb30ac10e158cc9d1557b508ee3f0eca1de 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/82afa5da2ae55d713e...
truncated to first 200 bytes; open job for full error
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] panic: runtime error: floating point error [recovered] (2) 0 (1) 2024/12/22 14:57
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 panic: runtime error: floating point error [recovered] 2 1 826d 826d 0/2 auto-obsoleted due to no activity on 2024/07/13 09:12
android-5-15 panic: runtime error: floating point error [recovered] (2) 2 1 844d 844d 0/2 auto-obsoleted due to no activity on 2024/06/25 05:19
android-6-1 panic: runtime error: floating point error [recovered] 2 3 840d 857d 0/2 auto-obsoleted due to no activity on 2024/06/29 09:32
upstream panic: runtime error: floating point error [recovered] 2 2 826d 842d 0/29 auto-obsoleted due to no activity on 2024/07/13 03:37
android-5-15 panic: runtime error: floating point error [recovered] 2 1 1312d 1312d 0/2 auto-obsoleted due to no activity on 2023/04/11 07:35
▶ ▼ Last patch testing requests (9)
Created Duration User Patch Repo Result
2026/07/15 20:07 21m retest repro upstream report log
2026/05/06 19:44 19m retest repro upstream log
2026/02/25 18:45 14m retest repro upstream report log
2025/12/17 17:54 12m retest repro upstream report log
2025/10/08 17:35 15m retest repro upstream report log
2025/07/30 16:59 20m retest repro upstream log
2025/05/21 15:45 13m retest repro upstream report log
2025/03/12 15:24 13m retest repro upstream report log
2025/01/01 14:50 12m retest repro upstream report log

Sample crash report:
panic: runtime error: floating point error [recovered]
	panic: bytes.Buffer: too large
[signal SIGFPE: floating-point exception code=0x80 addr=0x0 pc=0x474d52]

goroutine 7 [running]:
bytes.growSlice.func1()
	/usr/local/go/src/bytes/buffer.go:232 +0x45
panic({0x128f240?, 0x297a930?})
	/usr/local/go/src/runtime/panic.go:770 +0x132
bytes.growSlice({0xc007442800, 0x200, 0x1?}, 0x800?)
	/usr/local/go/src/bytes/buffer.go:249 +0xb9
bytes.(*Buffer).grow(0xc001b1c5a0, 0x1)
	/usr/local/go/src/bytes/buffer.go:151 +0x13d
bytes.(*Buffer).Write(0xc001b1c5a0, {0xc001e70800, 0x1, 0x0?})
	/usr/local/go/src/bytes/buffer.go:179 +0x59
fmt.Fprintf({0x1c7d9c0, 0xc001b1c5a0}, {0x1c1a3b0, 0x1}, {0x0, 0x0, 0x0})
	/usr/local/go/src/fmt/print.go:225 +0x97
github.com/google/syzkaller/prog.(*serializer).printf(...)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:64
github.com/google/syzkaller/prog.(*PointerArg).serialize(0xc001d8a990, 0xc001b1c600)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:142 +0x271
github.com/google/syzkaller/prog.(*serializer).arg(0x1c7d9c0?, {0x1c9c180?, 0xc001d8a990?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:125 +0x29
github.com/google/syzkaller/prog.(*GroupArg).serialize(0xc001d70f20, 0xc001b1c600)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:203 +0x26d
github.com/google/syzkaller/prog.(*serializer).arg(0x1c7d9c0?, {0x1c9c240?, 0xc001d70f20?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:125 +0x29
github.com/google/syzkaller/prog.(*PointerArg).serialize(0xc001d8ac30, 0xc001b1c600)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:146 +0x38e
github.com/google/syzkaller/prog.(*serializer).arg(0x1c7d9c0?, {0x1c9c180?, 0xc001d8ac30?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:125 +0x29
github.com/google/syzkaller/prog.(*serializer).call(0xc001b1c600, 0xc0007b6190)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:86 +0x216
github.com/google/syzkaller/prog.(*Prog).serialize(0xc000ca7280, 0x0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:46 +0xd8
github.com/google/syzkaller/prog.(*Prog).Serialize(...)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:30
github.com/google/syzkaller/pkg/rpcserver.(*Runner).handleExecutingMessage(0xc0002746c0, 0xc007431308)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/runner.go:371 +0x217
github.com/google/syzkaller/pkg/rpcserver.(*Runner).ConnectionLoop(0xc0002746c0)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/runner.go:201 +0x4b9
github.com/google/syzkaller/pkg/rpcserver.(*server).connectionLoop(0xc0016da300, 0xc0002746c0)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:356 +0x105
github.com/google/syzkaller/pkg/rpcserver.(*server).handleRunnerConn(0xc0016da300, 0xc0002746c0, 0xc00193e140)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:294 +0x411
github.com/google/syzkaller/pkg/rpcserver.(*server).handleConn(0xc0016da300, 0xc00193e140)
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:261 +0x2b6
github.com/google/syzkaller/pkg/flatrpc.ListenAndServe.func1.1()
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/flatrpc/conn.go:55 +0x122
created by github.com/google/syzkaller/pkg/flatrpc.ListenAndServe.func1 in goroutine 53
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/flatrpc/conn.go:52 +0xb1

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/18 14:49 upstream aef25be35d23 1432fc84 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream panic: runtime error: floating point error [recovered]
* Struck through repros no longer work on HEAD.