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Wed, 27 Mar 2024 07:58:03 -0700 (PDT) Date: Wed, 27 Mar 2024 07:58:03 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002ab3a50614a5a2b8@google.com> Subject: Re: [syzbot] [bpf?] [net?] general protection fault in dev_map_enqueue From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, syzbot tried to test the proposed patch but the build/boot failed: 7.829816][ T1] usbcore: registered new interface driver port100 [ 7.831413][ T1] usbcore: registered new interface driver nfcmrvl [ 7.837905][ T1] Loading iSCSI transport class v2.0-870. [ 7.858722][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues [ 7.869143][ T1] ------------[ cut here ]------------ [ 7.870105][ T1] refcount_t: decrement hit 0; leaking memory. [ 7.872514][ T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount= _warn_saturate+0xfa/0x1d0 [ 7.874530][ T1] Modules linked in: [ 7.875370][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc1-= syzkaller-g7033999ecd7b-dirty #0 [ 7.877291][ T1] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 02/29/2024 [ 7.879264][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 [ 7.881153][ T1] Code: b2 00 00 00 e8 57 df e9 fc 5b 5d c3 cc cc cc c= c e8 4b df e9 fc c6 05 4f 89 e8 0a 01 90 48 c7 c7 60 33 1f 8c e8 87 7b ac f= c 90 <0f> 0b 90 90 eb d9 e8 2b df e9 fc c6 05 2c 89 e8 0a 01 90 48 c7 c7 [ 7.884566][ T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246 [ 7.885519][ T1] RAX: 2b377ad567545500 RBX: ffff888020dced4c RCX: fff= f8880166d8000 [ 7.886879][ T1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000= 0000000000000 [ 7.888277][ T1] RBP: 0000000000000004 R08: ffffffff815800c2 R09: fff= ffbfff1c396e0 [ 7.889846][ T1] R10: dffffc0000000000 R11: fffffbfff1c396e0 R12: fff= fea000501edc0 [ 7.891597][ T1] R13: ffffea000501edc8 R14: 1ffffd4000a03db9 R15: 000= 0000000000000 [ 7.892863][ T1] FS: 0000000000000000(0000) GS:ffff8880b9400000(0000= ) knlGS:0000000000000000 [ 7.896023][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 7.897831][ T1] CR2: ffff88823ffff000 CR3: 000000000e132000 CR4: 000= 00000003506f0 [ 7.899872][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000= 0000000000000 [ 7.902920][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 000= 0000000000400 [ 7.905308][ T1] Call Trace: [ 7.906155][ T1] [ 7.907108][ T1] ? __warn+0x163/0x4e0 [ 7.908236][ T1] ? refcount_warn_saturate+0xfa/0x1d0 [ 7.909628][ T1] ? report_bug+0x2b3/0x500 [ 7.911322][ T1] ? refcount_warn_saturate+0xfa/0x1d0 [ 7.912413][ T1] ? handle_bug+0x3e/0x70 [ 7.913104][ T1] ? exc_invalid_op+0x1a/0x50 [ 7.913916][ T1] ? asm_exc_invalid_op+0x1a/0x20 [ 7.914971][ T1] ? __warn_printk+0x292/0x360 [ 7.915905][ T1] ? refcount_warn_saturate+0xfa/0x1d0 [ 7.917491][ T1] ? refcount_warn_saturate+0xf9/0x1d0 [ 7.919275][ T1] __free_pages_ok+0xc60/0xd90 [ 7.920758][ T1] make_alloc_exact+0xa3/0xf0 [ 7.921785][ T1] vring_alloc_queue_split+0x20a/0x600 [ 7.922946][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10 [ 7.929618][ T1] ? vp_find_vqs+0x4c/0x4e0 [ 7.930612][ T1] ? virtscsi_probe+0x3ea/0xf60 [ 7.931909][ T1] ? virtio_dev_probe+0x991/0xaf0 [ 7.933205][ T1] ? really_probe+0x2b8/0xad0 [ 7.934463][ T1] ? driver_probe_device+0x50/0x430 [ 7.936429][ T1] vring_create_virtqueue_split+0xc6/0x310 [ 7.937419][ T1] ? ret_from_fork+0x4b/0x80 [ 7.938584][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10 [ 7.940730][ T1] vring_create_virtqueue+0xca/0x110 [ 7.941726][ T1] ? __pfx_vp_notify+0x10/0x10 [ 7.942814][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 7.943976][ T1] setup_vq+0xe9/0x2d0 [ 7.944801][ T1] ? __pfx_vp_notify+0x10/0x10 [ 7.945576][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 7.946948][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 7.948006][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 7.949084][ T1] vp_setup_vq+0xbf/0x330 [ 7.949824][ T1] ? __pfx_vp_config_changed+0x10/0x10 [ 7.950979][ T1] ? ioread16+0x2f/0x90 [ 7.951822][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 7.953388][ T1] vp_find_vqs_msix+0x8b2/0xc80 [ 7.954915][ T1] vp_find_vqs+0x4c/0x4e0 [ 7.955862][ T1] virtscsi_init+0x8db/0xd00 [ 7.956749][ T1] ? __pfx_virtscsi_init+0x10/0x10 [ 7.957896][ T1] ? __pfx_default_calc_sets+0x10/0x10 [ 7.959614][ T1] ? scsi_host_alloc+0xa57/0xea0 [ 7.961011][ T1] ? vp_get+0xfd/0x140 [ 7.962132][ T1] virtscsi_probe+0x3ea/0xf60 [ 7.962965][ T1] ? __pfx_virtscsi_probe+0x10/0x10 [ 7.964000][ T1] ? vp_set+0x34d/0x350 [ 7.965137][ T1] ? __pfx_vp_set_status+0x10/0x10 [ 7.966023][ T1] ? vp_set_status+0x1a/0x40 [ 7.966940][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10 [ 7.968109][ T1] ? virtio_features_ok+0x10c/0x270 [ 7.969198][ T1] virtio_dev_probe+0x991/0xaf0 [ 7.970151][ T1] ? __pfx_virtio_dev_probe+0x10/0x10 [ 7.971070][ T1] really_probe+0x2b8/0xad0 [ 7.971988][ T1] __driver_probe_device+0x1a2/0x390 [ 7.973433][ T1] driver_probe_device+0x50/0x430 [ 7.974431][ T1] __driver_attach+0x45f/0x710 [ 7.975759][ T1] ? __pfx___driver_attach+0x10/0x10 [ 7.977202][ T1] bus_for_each_dev+0x239/0x2b0 [ 7.978309][ T1] ? __pfx___driver_attach+0x10/0x10 [ 7.979888][ T1] ? __pfx_bus_for_each_dev+0x10/0x10 [ 7.981067][ T1] ? do_raw_spin_unlock+0x13c/0x8b0 [ 7.982284][ T1] bus_add_driver+0x347/0x620 [ 7.983346][ T1] driver_register+0x23a/0x320 [ 7.984227][ T1] ? __pfx_virtio_scsi_init+0x10/0x10 [ 7.985533][ T1] virtio_scsi_init+0x65/0xe0 [ 7.986807][ T1] ? __pfx_virtio_scsi_init+0x10/0x10 [ 7.988078][ T1] do_one_initcall+0x248/0x880 [ 7.989286][ T1] ? __pfx_virtio_scsi_init+0x10/0x10 [ 7.990438][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 7.991719][ T1] ? __pfx_do_one_initcall+0x10/0x10 [ 7.993284][ T1] ? __pfx_parse_args+0x10/0x10 [ 7.994653][ T1] ? do_initcalls+0x1c/0x80 [ 7.995768][ T1] ? rcu_is_watching+0x15/0xb0 [ 7.996707][ T1] do_initcall_level+0x157/0x210 [ 7.997710][ T1] do_initcalls+0x3f/0x80 [ 7.998399][ T1] kernel_init_freeable+0x435/0x5d0 [ 7.999965][ T1] ? __pfx_kernel_init_freeable+0x10/0x10 [ 8.001669][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 8.003259][ T1] ? __pfx_kernel_init+0x10/0x10 [ 8.003962][ T1] ? __pfx_kernel_init+0x10/0x10 [ 8.005204][ T1] ? __pfx_kernel_init+0x10/0x10 [ 8.006149][ T1] kernel_init+0x1d/0x2b0 [ 8.007084][ T1] ret_from_fork+0x4b/0x80 [ 8.008082][ T1] ? __pfx_kernel_init+0x10/0x10 [ 8.009623][ T1] ret_from_fork_asm+0x1a/0x30 [ 8.010782][ T1] [ 8.011305][ T1] Kernel panic - not syncing: kernel: panic_on_warn se= t ... [ 8.012595][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc1-= syzkaller-g7033999ecd7b-dirty #0 [ 8.014252][ T1] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 02/29/2024 [ 8.015689][ T1] Call Trace: [ 8.016148][ T1] [ 8.016559][ T1] dump_stack_lvl+0x241/0x360 [ 8.017219][ T1] ? __pfx_dump_stack_lvl+0x10/0x10 [ 8.017934][ T1] ? __pfx__printk+0x10/0x10 [ 8.018600][ T1] ? _printk+0xd5/0x120 [ 8.019417][ T1] ? vscnprintf+0x5d/0x90 [ 8.020186][ T1] panic+0x349/0x860 [ 8.020754][ T1] ? __warn+0x172/0x4e0 [ 8.020754][ T1] ? __pfx_panic+0x10/0x10 [ 8.020754][ T1] ? show_trace_log_lvl+0x4e6/0x520 [ 8.020754][ T1] ? ret_from_fork_asm+0x1a/0x30 [ 8.020754][ T1] __warn+0x346/0x4e0 [ 8.020754][ T1] ? refcount_warn_saturate+0xfa/0x1d0 [ 8.020754][ T1] report_bug+0x2b3/0x500 [ 8.020754][ T1] ? refcount_warn_saturate+0xfa/0x1d0 [ 8.020754][ T1] handle_bug+0x3e/0x70 [ 8.020754][ T1] exc_invalid_op+0x1a/0x50 [ 8.020754][ T1] asm_exc_invalid_op+0x1a/0x20 [ 8.020754][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 [ 8.020754][ T1] Code: b2 00 00 00 e8 57 df e9 fc 5b 5d c3 cc cc cc c= c e8 4b df e9 fc c6 05 4f 89 e8 0a 01 90 48 c7 c7 60 33 1f 8c e8 87 7b ac f= c 90 <0f> 0b 90 90 eb d9 e8 2b df e9 fc c6 05 2c 89 e8 0a 01 90 48 c7 c7 [ 8.030364][ T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246 [ 8.030364][ T1] RAX: 2b377ad567545500 RBX: ffff888020dced4c RCX: fff= f8880166d8000 [ 8.030364][ T1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000= 0000000000000 [ 8.030364][ T1] RBP: 0000000000000004 R08: ffffffff815800c2 R09: fff= ffbfff1c396e0 [ 8.030364][ T1] R10: dffffc0000000000 R11: fffffbfff1c396e0 R12: fff= fea000501edc0 [ 8.030364][ T1] R13: ffffea000501edc8 R14: 1ffffd4000a03db9 R15: 000= 0000000000000 [ 8.030364][ T1] ? __warn_printk+0x292/0x360 [ 8.030364][ T1] ? refcount_warn_saturate+0xf9/0x1d0 [ 8.040252][ T1] __free_pages_ok+0xc60/0xd90 [ 8.040252][ T1] make_alloc_exact+0xa3/0xf0 [ 8.040252][ T1] vring_alloc_queue_split+0x20a/0x600 [ 8.040252][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10 [ 8.040252][ T1] ? vp_find_vqs+0x4c/0x4e0 [ 8.040252][ T1] ? virtscsi_probe+0x3ea/0xf60 [ 8.040252][ T1] ? virtio_dev_probe+0x991/0xaf0 [ 8.040252][ T1] ? really_probe+0x2b8/0xad0 [ 8.040252][ T1] ? driver_probe_device+0x50/0x430 [ 8.040252][ T1] vring_create_virtqueue_split+0xc6/0x310 [ 8.040252][ T1] ? ret_from_fork+0x4b/0x80 [ 8.050346][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10 [ 8.050346][ T1] vring_create_virtqueue+0xca/0x110 [ 8.050346][ T1] ? __pfx_vp_notify+0x10/0x10 [ 8.050346][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 8.050346][ T1] setup_vq+0xe9/0x2d0 [ 8.050346][ T1] ? __pfx_vp_notify+0x10/0x10 [ 8.050346][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 8.050346][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 8.050346][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 8.050346][ T1] vp_setup_vq+0xbf/0x330 [ 8.050346][ T1] ? __pfx_vp_config_changed+0x10/0x10 [ 8.050346][ T1] ? ioread16+0x2f/0x90 [ 8.050346][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10 [ 8.050346][ T1] vp_find_vqs_msix+0x8b2/0xc80 [ 8.060243][ T1] vp_find_vqs+0x4c/0x4e0 [ 8.060243][ T1] virtscsi_init+0x8db/0xd00 [ 8.060243][ T1] ? __pfx_virtscsi_init+0x10/0x10 [ 8.060243][ T1] ? __pfx_default_calc_sets+0x10/0x10 [ 8.060243][ T1] ? scsi_host_alloc+0xa57/0xea0 [ 8.060243][ T1] ? vp_get+0xfd/0x140 [ 8.060243][ T1] virtscsi_probe+0x3ea/0xf60 [ 8.060243][ T1] ? __pfx_virtscsi_probe+0x10/0x10 [ 8.060243][ T1] ? vp_set+0x34d/0x350 [ 8.060243][ T1] ? __pfx_vp_set_status+0x10/0x10 [ 8.060243][ T1] ? vp_set_status+0x1a/0x40 [ 8.060243][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10 [ 8.060243][ T1] ? virtio_features_ok+0x10c/0x270 [ 8.070334][ T1] virtio_dev_probe+0x991/0xaf0 [ 8.070334][ T1] ? __pfx_virtio_dev_probe+0x10/0x10 [ 8.070334][ T1] really_probe+0x2b8/0xad0 [ 8.070334][ T1] __driver_probe_device+0x1a2/0x390 [ 8.070334][ T1] driver_probe_device+0x50/0x430 [ 8.070334][ T1] __driver_attach+0x45f/0x710 [ 8.070334][ T1] ? __pfx___driver_attach+0x10/0x10 [ 8.070334][ T1] bus_for_each_dev+0x239/0x2b0 [ 8.070334][ T1] ? __pfx___driver_attach+0x10/0x10 [ 8.070334][ T1] ? __pfx_bus_for_each_dev+0x10/0x10 [ 8.070334][ T1] ? do_raw_spin_unlock+0x13c/0x8b0 [ 8.070334][ T1] bus_add_driver+0x347/0x620 [ 8.080263][ T1] driver_register+0x23a/0x320 [ 8.080263][ T1] ? __pfx_virtio_scsi_init+0x10/0x10 [ 8.080263][ T1] virtio_scsi_init+0x65/0xe0 [ 8.080263][ T1] ? __pfx_virtio_scsi_init+0x10/0x10 [ 8.080263][ T1] do_one_initcall+0x248/0x880 [ 8.080263][ T1] ? __pfx_virtio_scsi_init+0x10/0x10 [ 8.080263][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 8.080263][ T1] ? __pfx_do_one_initcall+0x10/0x10 [ 8.080263][ T1] ? __pfx_parse_args+0x10/0x10 [ 8.080263][ T1] ? do_initcalls+0x1c/0x80 [ 8.080263][ T1] ? rcu_is_watching+0x15/0xb0 [ 8.080263][ T1] do_initcall_level+0x157/0x210 [ 8.080263][ T1] do_initcalls+0x3f/0x80 [ 8.080263][ T1] kernel_init_freeable+0x435/0x5d0 [ 8.090336][ T1] ? __pfx_kernel_init_freeable+0x10/0x10 [ 8.090336][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 8.090336][ T1] ? __pfx_kernel_init+0x10/0x10 [ 8.090336][ T1] ? __pfx_kernel_init+0x10/0x10 [ 8.090336][ T1] ? __pfx_kernel_init+0x10/0x10 [ 8.090336][ T1] kernel_init+0x1d/0x2b0 [ 8.090336][ T1] ret_from_fork+0x4b/0x80 [ 8.090336][ T1] ? __pfx_kernel_init+0x10/0x10 [ 8.090336][ T1] ret_from_fork_asm+0x1a/0x30 [ 8.090336][ T1] [ 8.090336][ T1] Kernel Offset: disabled [ 8.090336][ T1] Rebooting in 86400 seconds.. syzkaller build log: go env (err=3D) GO111MODULE=3D'auto' GOARCH=3D'amd64' GOBIN=3D'' GOCACHE=3D'/syzkaller/.cache/go-build' GOENV=3D'/syzkaller/.config/go/env' GOEXE=3D'' GOEXPERIMENT=3D'' GOFLAGS=3D'' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' GOMODCACHE=3D'/syzkaller/jobs-2/linux/gopath/pkg/mod' GONOPROXY=3D'' GONOSUMDB=3D'' GOOS=3D'linux' GOPATH=3D'/syzkaller/jobs-2/linux/gopath' GOPRIVATE=3D'' GOPROXY=3D'https://proxy.golang.org,direct' GOROOT=3D'/usr/local/go' GOSUMDB=3D'sum.golang.org' GOTMPDIR=3D'' GOTOOLCHAIN=3D'auto' GOTOOLDIR=3D'/usr/local/go/pkg/tool/linux_amd64' GOVCS=3D'' GOVERSION=3D'go1.21.4' GCCGO=3D'gccgo' GOAMD64=3D'v1' AR=3D'ar' CC=3D'gcc' CXX=3D'g++' CGO_ENABLED=3D'1' GOMOD=3D'/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.= mod' GOWORK=3D'' CGO_CFLAGS=3D'-O2 -g' CGO_CPPFLAGS=3D'' CGO_CXXFLAGS=3D'-O2 -g' CGO_FFLAGS=3D'-O2 -g' CGO_LDFLAGS=3D'-O2 -g' PKG_CONFIG=3D'pkg-config' GOGCCFLAGS=3D'-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=3D0= -ffile-prefix-map=3D/tmp/go-build3591245852=3D/tmp/go-build -gno-record-gc= c-switches' git status (err=3D) HEAD detached at 454571b6a nothing to commit, working tree clean tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contribut= ing.md#using-syz-env go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sy= s/syz-sysgen make .descriptions tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contribut= ing.md#using-syz-env bin/syz-sysgen touch .descriptions GOOS=3Dlinux GOARCH=3Damd64 go build "-ldflags=3D-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D454571b6a16598f5a6e015b9fb1a04932bce7ab9 -X '= github.com/google/syzkaller/prog.gitRevisionDate=3D20240326-163935'" "-tags= =3Dsyz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer= github.com/google/syzkaller/syz-fuzzer GOOS=3Dlinux GOARCH=3Damd64 go build "-ldflags=3D-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D454571b6a16598f5a6e015b9fb1a04932bce7ab9 -X '= github.com/google/syzkaller/prog.gitRevisionDate=3D20240326-163935'" "-tags= =3Dsyz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execpr= og github.com/google/syzkaller/tools/syz-execprog GOOS=3Dlinux GOARCH=3Damd64 go build "-ldflags=3D-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D454571b6a16598f5a6e015b9fb1a04932bce7ab9 -X '= github.com/google/syzkaller/prog.gitRevisionDate=3D20240326-163935'" "-tags= =3Dsyz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress= github.com/google/syzkaller/tools/syz-stress mkdir -p ./bin/linux_amd64 gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \ -m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wfr= ame-larger-than=3D16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-forma= t-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -= static-pie -fpermissive -w -DGOOS_linux=3D1 -DGOARCH_amd64=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"454571b6a16598f5a6e015b9fb1a04932b= ce7ab9\" Error text is too large and was truncated, full error text is at: https://syzkaller.appspot.com/x/error.txt?x=3D12d2cb65180000 Tested on: commit: 7033999e Merge tag 'printk-for-6.9-rc2' of git://git.k.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/li= nux.git master kernel config: https://syzkaller.appspot.com/x/.config?x=3D7b667bc37450fdc= d dashboard link: https://syzkaller.appspot.com/bug?extid=3Daf9492708df979719= 8d6 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debia= n) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D1066d4211800= 00