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AJvYcCVYXpZJJTK550tg5mZqtQYWBb5tITwGmsPppTVClzx+A6dQgK4k5ycPUpZGS1O2+jA5nyojg83KZeNR/yY=@vger.kernel.org X-Gm-Message-State: AOJu0YzRAENytam/X7M7flmWLc7GEKAg4OWUquMS2iPd13kyHLa3qIL2 A7FYP3EW11UoKLWQXOwfE9YcTsiJGbGLzoptbLvkCCDJucVlm2xlDnX4tr5cOB34LSw2HSIT4Ip uYob7Mmv26oKZf4sX0N2k2vSdgTjuyQ+WdTOdODNGDUnYFw3F9InEZPuGojE= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:160a:b0:677:fc0b:dc with SMTP id 006d021491bc7-679c4491a03mr2114055eaf.33.1771712583396; Sat, 21 Feb 2026 14:23:03 -0800 (PST) Date: Sat, 21 Feb 2026 14:23:03 -0800 In-Reply-To: <20260221215717.3315-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <699a3047.050a0220.340abe.0d2b.GAE@google.com> Subject: Re: [syzbot] [media?] KASAN: slab-use-after-free Read in dvb_frontend_release (3) From: syzbot To: hdanton@sina.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: _SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level) [ 0.324084][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 hi= gh level) [ 0.324103][ T0] ACPI: Using ACPI (MADT) for SMP configuration inform= ation [ 0.324118][ T0] CPU topo: Max. logical packages: 1 [ 0.324122][ T0] CPU topo: Max. logical dies: 1 [ 0.324126][ T0] CPU topo: Max. dies per package: 1 [ 0.324137][ T0] CPU topo: Max. threads per core: 2 [ 0.324142][ T0] CPU topo: Num. cores per package: 1 [ 0.324146][ T0] CPU topo: Num. threads per package: 2 [ 0.324150][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPU= s [ 0.324260][ T0] PM: hibernation: Registered nosave memory: [mem 0x00= 000000-0x00000fff] [ 0.324270][ T0] PM: hibernation: Registered nosave memory: [mem 0x00= 09f000-0x000fffff] [ 0.324278][ T0] PM: hibernation: Registered nosave memory: [mem 0xbf= ffd000-0xffffffff] [ 0.324303][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI device= s [ 0.324309][ T0] Booting paravirtualized kernel on KVM [ 0.324320][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_c= ycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 0.457957][ T0] Zone ranges: [ 0.457966][ T0] DMA [mem 0x0000000000001000-0x0000000000fffff= f] [ 0.457977][ T0] DMA32 [mem 0x0000000001000000-0x00000000fffffff= f] [ 0.457985][ T0] Normal [mem 0x0000000100000000-0x000000023ffffff= f] [ 0.457993][ T0] Device empty [ 0.457998][ T0] Movable zone start for each node [ 0.458001][ T0] Early memory node ranges [ 0.458005][ T0] node 0: [mem 0x0000000000001000-0x000000000009ef= ff] [ 0.458011][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcf= ff] [ 0.458019][ T0] node 0: [mem 0x0000000100000000-0x0000000140000f= ff] [ 0.458025][ T0] node 1: [mem 0x0000000140001000-0x000000023fffff= ff] [ 0.458034][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x00000= 00140000fff] [ 0.458049][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x00000= 0023fffffff] [ 0.458095][ T0] On node 0, zone DMA: 1 pages in unavailable ranges [ 0.458339][ T0] On node 0, zone DMA: 97 pages in unavailable ranges [ 0.520754][ T0] On node 0, zone Normal: 3 pages in unavailable range= s [ 0.583334][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids= :2 nr_node_ids:2 [ 0.584030][ T0] percpu: Embedded 72 pages/cpu s254408 r8192 d32312 u= 1048576 [ 0.584054][ T0] pcpu-alloc: s254408 r8192 d32312 u1048576 alloc=3D1*= 2097152 [ 0.584066][ T0] pcpu-alloc: [0] 0 1=20 [ 0.584177][ T0] kvm-guest: PV spinlocks enabled [ 0.584186][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096= bytes, linear) [ 0.584203][ T0] Kernel command line: earlyprintk=3Dserial net.ifname= s=3D0 sysctl.kernel.hung_task_all_cpu_backtrace=3D1 ima_policy=3Dtcb nf-con= ntrack-ftp.ports=3D20000 nf-conntrack-tftp.ports=3D20000 nf-conntrack-sip.p= orts=3D20000 nf-conntrack-irc.ports=3D20000 nf-conntrack-sane.ports=3D20000= binder.debug_mask=3D0 rcupdate.rcu_expedited=3D1 rcupdate.rcu_cpu_stall_cp= utime=3D1 no_hash_pointers page_owner=3Don sysctl.vm.nr_hugepages=3D4 sysct= l.vm.nr_overcommit_hugepages=3D4 secretmem.enable=3D1 sysctl.max_rcu_stall_= to_panic=3D1 msr.allow_writes=3Doff coredump_filter=3D0xffff root=3D/dev/sd= a console=3DttyS0 vsyscall=3Dnative numa=3Dfake=3D2 kvm-intel.nested=3D1 sp= ec_store_bypass_disable=3Dprctl nopcid vivid.n_devs=3D64 vivid.multiplanar= =3D1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,= 1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2 netrom.nr_ndevs=3D3= 2 rose.rose_ndevs=3D32 smp.csd_lock_timeout=3D100000 watchdog_thresh=3D55 w= orkqueue.watchdog_thresh=3D140 sysctl.net.core.netdev_unregister_timeout_se= cs=3D140 dummy_hcd.num=3D32 max_loop=3D32 nbds_max=3D32 \ [ 0.584229][ T0] Kernel command line: comedi.comedi_num_legacy_minors= =3D4 panic_on_warn=3D1 BOOT_IMAGE=3D/boot/bzImage root=3D/dev/sda1 console= =3DttyS0 [ 0.588483][ T0] Unknown kernel command line parameters "nbds_max=3D3= 2", will be passed to user space. [ 0.588544][ T0] random: crng init done [ 0.588547][ T0] printk: log buffer data + meta data: 262144 + 917504= =3D 1179648 bytes [ 0.588761][ T0] software IO TLB: area num 2. [ 0.616645][ T0] Fallback order for Node 0: 0 1=20 [ 0.616664][ T0] Fallback order for Node 1: 1 0=20 [ 0.616678][ T0] Built 2 zonelists, mobility grouping on. Total page= s: 2097051 [ 0.616685][ T0] Policy zone: Normal [ 0.617377][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap = free:off [ 0.617385][ T0] stackdepot: allocating hash table via alloc_large_sy= stem_hash [ 0.617395][ T0] stackdepot hash table entries: 1048576 (order: 12, 1= 6777216 bytes, linear) [ 0.622068][ T0] stackdepot: allocating space for 8192 stack pools vi= a memblock [ 1.210344][ T0] ****************************************************= ****** [ 1.210354][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTIC= E ** [ 1.210358][ T0] ** = ** [ 1.210362][ T0] ** This system shows unhashed kernel memory addresse= s ** [ 1.210365][ T0] ** via the console, logs, and other interfaces. This= ** [ 1.210369][ T0] ** might reduce the security of your system. = ** [ 1.210373][ T0] ** = ** [ 1.210376][ T0] ** If you see this message and you are not debugging= ** [ 1.210380][ T0] ** the kernel, report this immediately to your syste= m ** [ 1.210384][ T0] ** administrator! = ** [ 1.210387][ T0] ** = ** [ 1.210391][ T0] ** Use hash_pointers=3Dalways to force this mode off= ** [ 1.210395][ T0] ** = ** [ 1.210398][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTIC= E ** [ 1.210402][ T0] ****************************************************= ****** [ 1.213877][ T0] SLUB: HWalign=3D64, Order=3D0-3, MinObjects=3D0, CPU= s=3D2, Nodes=3D2 [ 1.344641][ T0] allocated 167772160 bytes of page_ext [ 1.344682][ T0] Node 0, zone DMA: page owner found early alloca= ted 0 pages [ 1.358368][ T0] Node 0, zone DMA32: page owner found early alloca= ted 21120 pages [ 1.362689][ T0] Node 0, zone Normal: page owner found early alloca= ted 130 pages [ 1.373648][ T0] Node 1, zone Normal: page ownserialport: Connected= to syzkaller.us-central1-c.ci-upstream-kasan-gce-smack-root-test-job-paral= lel-0 port 1 (session ID: 27e7da33582c2a1f5960f3e4d1e08a357e0ae697147fe0445= 10b0304e2ed012c, active connections: 1). er found early allocated 19848 pages [ 1.374121][ T0] Kernel/User page tables isolation: enabled [ 1.376324][ T0] Dynamic Preempt: full [ 1.377426][ T0] ------------[ cut here ]------------ [ 1.377431][ T0] overflows_flex_counter_type(typeof(*ctx), pwq_tbl, _= _count) [ 1.377435][ T0] WARNING: kernel/workqueue.c:5373 at apply_wqattrs_pr= epare+0xa5/0x1f0, CPU#0: swapper/0/0 [ 1.377461][ T0] Modules linked in: [ 1.377470][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syz= kaller #0 PREEMPT_{RT,(full)}=20 [ 1.377481][ T0] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 02/12/2026 [ 1.377488][ T0] RIP: 0010:apply_wqattrs_prepare+0xa5/0x1f0 [ 1.377507][ T0] Code: d8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 2b 0= 1 00 00 8b 1b bf 05 00 00 00 89 de e8 55 2b 35 00 83 fb 06 0f 83 ce 00 00 0= 0 90 <0f> 0b 90 48 c7 c0 60 61 5e 8d 48 c1 e8 03 42 80 3c 38 00 74 0c 48 [ 1.377516][ T0] RSP: 0000:ffffffff8d807bf8 EFLAGS: 00010097 [ 1.377524][ T0] RAX: ffffffff818e73bb RBX: 0000000000000000 RCX: fff= fffff8d902f00 [ 1.377531][ T0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000= 0000000000005 [ 1.377537][ T0] RBP: 0000000000000001 R08: 0000000000000000 R09: 000= 0000000000000 [ 1.377543][ T0] R10: dffffc0000000000 R11: fffffbfff1e912b7 R12: fff= f88813fe749c8 [ 1.377550][ T0] R13: dffffc0000000000 R14: 0000000000000000 R15: dff= ffc0000000000 [ 1.377562][ T0] FS: 0000000000000000(0000) GS:ffff888126592000(0000= ) knlGS:0000000000000000 [ 1.377572][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.377579][ T0] CR2: ffff88823ffff000 CR3: 000000000d9ba000 CR4: 000= 00000000000b0 [ 1.377588][ T0] Call Trace: [ 1.377593][ T0] [ 1.377599][ T0] __alloc_workqueue+0xfbe/0x1e70 [ 1.377617][ T0] alloc_workqueue_noprof+0xe3/0x210 [ 1.377629][ T0] ? is_dynamic_key+0xd6/0x1c0 [ 1.377644][ T0] ? __pfx_alloc_workqueue_noprof+0x10/0x10 [ 1.377657][ T0] ? __kmalloc_cache_noprof+0x3a6/0x690 [ 1.377670][ T0] ? workqueue_init_early+0x89b/0xcf0 [ 1.377687][ T0] workqueue_init_early+0xaac/0xcf0 [ 1.377700][ T0] ? __cpuhp_setup_state+0x46/0x60 [ 1.377717][ T0] ? __pfx_workqueue_init_early+0x10/0x10 [ 1.377733][ T0] ? register_trace_event+0x3f7/0x4b0 [ 1.377749][ T0] start_kernel+0x189/0x3d0 [ 1.377760][ T0] x86_64_start_reservations+0x24/0x30 [ 1.377773][ T0] x86_64_start_kernel+0x143/0x1c0 [ 1.377786][ T0] common_startup_64+0x13e/0x147 [ 1.377804][ T0] [ 1.377810][ T0] Kernel panic - not syncing: kernel: panic_on_warn se= t ... [ 1.377816][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syz= kaller #0 PREEMPT_{RT,(full)}=20 [ 1.377827][ T0] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 02/12/2026 [ 1.377833][ T0] Call Trace: [ 1.377837][ T0] [ 1.377840][ T0] vpanic+0x56c/0xa60 [ 1.377856][ T0] ? __pfx__printk+0x10/0x10 [ 1.377868][ T0] ? __pfx_vpanic+0x10/0x10 [ 1.377881][ T0] ? is_bpf_text_address+0x292/0x2b0 [ 1.377894][ T0] ? is_bpf_text_address+0x26/0x2b0 [ 1.377914][ T0] panic+0xc5/0xd0 [ 1.377928][ T0] ? __pfx_panic+0x10/0x10 [ 1.377947][ T0] ? common_startup_64+0x13e/0x147 [ 1.377959][ T0] __warn+0x315/0x4f0 [ 1.377973][ T0] ? apply_wqattrs_prepare+0xa5/0x1f0 [ 1.377987][ T0] ? apply_wqattrs_prepare+0xa5/0x1f0 [ 1.378000][ T0] __report_bug+0x29a/0x540 [ 1.378020][ T0] ? apply_wqattrs_prepare+0xa5/0x1f0 [ 1.378033][ T0] ? __pfx___report_bug+0x10/0x10 [ 1.378049][ T0] ? do_raw_spin_unlock+0xf6/0x210 [ 1.378064][ T0] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 1.378074][ T0] ? rt_mutex_slowunlock+0x1cb/0x300 [ 1.378088][ T0] ? __pfx_rt_mutex_slowunlock+0x10/0x10 [ 1.378102][ T0] ? apply_wqattrs_prepare+0xa5/0x1f0 [ 1.378115][ T0] report_bug+0x16a/0x220 [ 1.378130][ T0] ? apply_wqattrs_prepare+0xa5/0x1f0 [ 1.378142][ T0] ? apply_wqattrs_prepare+0xa7/0x1f0 [ 1.378155][ T0] handle_bug+0x98/0x200 [ 1.378168][ T0] exc_invalid_op+0x1a/0x50 [ 1.378179][ T0] asm_exc_invalid_op+0x1a/0x20 [ 1.378190][ T0] RIP: 0010:apply_wqattrs_prepare+0xa5/0x1f0 [ 1.378203][ T0] Code: d8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 2b 0= 1 00 00 8b 1b bf 05 00 00 00 89 de e8 55 2b 35 00 83 fb 06 0f 83 ce 00 00 0= 0 90 <0f> 0b 90 48 c7 c0 60 61 5e 8d 48 c1 e8 03 42 80 3c 38 00 74 0c 48 [ 1.378211][ T0] RSP: 0000:ffffffff8d807bf8 EFLAGS: 00010097 [ 1.378219][ T0] RAX: ffffffff818e73bb RBX: 0000000000000000 RCX: fff= fffff8d902f00 [ 1.378226][ T0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000= 0000000000005 [ 1.378231][ T0] RBP: 0000000000000001 R08: 0000000000000000 R09: 000= 0000000000000 [ 1.378237][ T0] R10: dffffc0000000000 R11: fffffbfff1e912b7 R12: fff= f88813fe749c8 [ 1.378244][ T0] R13: dffffc0000000000 R14: 0000000000000000 R15: dff= ffc0000000000 [ 1.378254][ T0] ? apply_wqattrs_prepare+0x9b/0x1f0 [ 1.378270][ T0] ? apply_wqattrs_prepare+0x9b/0x1f0 [ 1.378284][ T0] __alloc_workqueue+0xfbe/0x1e70 [ 1.378300][ T0] alloc_workqueue_noprof+0xe3/0x210 [ 1.378312][ T0] ? is_dynamic_key+0xd6/0x1c0 [ 1.378326][ T0] ? __pfx_alloc_workqueue_noprof+0x10/0x10 [ 1.378339][ T0] ? __kmalloc_cache_noprof+0x3a6/0x690 [ 1.378351][ T0] ? workqueue_init_early+0x89b/0xcf0 [ 1.378367][ T0] workqueue_init_early+0xaac/0xcf0 [ 1.378380][ T0] ? __cpuhp_setup_state+0x46/0x60 [ 1.378396][ T0] ? __pfx_workqueue_init_early+0x10/0x10 [ 1.378412][ T0] ? register_trace_event+0x3f7/0x4b0 [ 1.378426][ T0] start_kernel+0x189/0x3d0 [ 1.378436][ T0] x86_64_start_reservations+0x24/0x30 [ 1.378449][ T0] x86_64_start_kernel+0x143/0x1c0 [ 1.378462][ T0] common_startup_64+0x13e/0x147 [ 1.378479][ T0] syzkaller build log: go env (err=3D) AR=3D'ar' CC=3D'gcc' CGO_CFLAGS=3D'-O2 -g' CGO_CPPFLAGS=3D'' CGO_CXXFLAGS=3D'-O2 -g' CGO_ENABLED=3D'1' CGO_FFLAGS=3D'-O2 -g' CGO_LDFLAGS=3D'-O2 -g' CXX=3D'g++' GCCGO=3D'gccgo' GO111MODULE=3D'auto' GOAMD64=3D'v1' GOARCH=3D'amd64' GOAUTH=3D'netrc' GOBIN=3D'' GOCACHE=3D'/syzkaller/.cache/go-build' GOCACHEPROG=3D'' GODEBUG=3D'' GOENV=3D'/syzkaller/.config/go/env' GOEXE=3D'' GOEXPERIMENT=3D'' GOFIPS140=3D'off' GOFLAGS=3D'' GOGCCFLAGS=3D'-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=3D0= -ffile-prefix-map=3D/tmp/go-build634184225=3D/tmp/go-build -gno-record-gcc= -switches' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' GOMOD=3D'/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.= mod' 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' GOTELEMETRY=3D'local' GOTELEMETRYDIR=3D'/syzkaller/.config/go/telemetry' GOTMPDIR=3D'' GOTOOLCHAIN=3D'auto' GOTOOLDIR=3D'/usr/local/go/pkg/tool/linux_amd64' GOVCS=3D'' GOVERSION=3D'go1.24.4' GOWORK=3D'' PKG_CONFIG=3D'pkg-config' git status (err=3D) HEAD detached at 1e62d19825 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}}' -ldflags=3D"-s -w -X github.com/google/syzkaller/pr= og.GitRevision=3D1e62d1982527c3b4e18df04d61f2560fa1f434cc -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20260213-152336" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3D1e62d1982527c3b4e18df04d61f2560fa1f434cc -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20260213-152336" ./sys/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=3D1e62d1982527c3b4e18df04d61f2560fa1f434cc -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20260213-152336" -o ./bi= n/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog mkdir -p ./bin/linux_amd64 g++ -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 -std=3Dc++17 -I. -Iexecutor/_include -DGOOS_linux=3D1 -DGOARCH= _amd64=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"1e62d1982527c3b4e18df04d61f2560fa1= f434cc\" /usr/bin/ld: /tmp/ccZjc2ZB.o: in function `Connection::Connect(char const*,= char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applicat= ions requires at runtime the shared libraries from the glibc version used f= or linking ./tools/check-syzos.sh 2>/dev/null Error text is too large and was truncated, full error text is at: https://syzkaller.appspot.com/x/error.txt?x=3D17938152580000 Tested on: commit: 8934827d Merge tag 'kmalloc_obj-treewide-v7.0-rc1' of .. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=3D5ca447d428dc707= 9 dashboard link: https://syzkaller.appspot.com/bug?extid=3Dae466a728017ec940= b41 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-= 1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D114b7c025800= 00