From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E5AF2172BD5 for ; Sat, 22 Mar 2025 10:04:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742637848; cv=none; b=D5ys5hh+IdUOjo0NdNjaGc8iz4LV+AQoXaFSXFZh1lksZnXpsdTeSVsYuDuhq3jMvs3olK0Og0cpaoeG9nQCUkLOemX+kvcAKS77pMTobnlKxnaiej/tqUhWsHytmUzwZzrOFox6xrKSrM9GQ3sCqkCG6B4nZDlFFEGYsU69968= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742637848; c=relaxed/simple; bh=oj1Igs3QBEvZNrFATGpIPFCLMe1BUEtx8R4spYLcQJA=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; 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linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:318a:b0:3d5:890b:d9e1 with SMTP id e9e14a558f8ab-3d595ec52f0mr70596655ab.1.1742637843551; Sat, 22 Mar 2025 03:04:03 -0700 (PDT) Date: Sat, 22 Mar 2025 03:04:03 -0700 In-Reply-To: <20250322093737.197101-1-duttaditya18@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67de8b13.050a0220.31a16b.0030.GAE@google.com> Subject: Re: [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in add_missing_indices From: syzbot To: duttaditya18@gmail.com, jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@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: 7.299426][ T6437] evict+0x444/0x978 [ 57.300436][ T6437] iput+0x740/0x8e8 [ 57.301425][ T6437] dentry_unlink_inode+0x3a0/0x4e0 [ 57.302787][ T6437] __dentry_kill+0x178/0x5e8 [ 57.303966][ T6437] shrink_kill+0xd4/0x2cc [ 57.305091][ T6437] shrink_dentry_list+0x31c/0x768 [ 57.306403][ T6437] shrink_dcache_parent+0xc4/0x374 [ 57.307725][ T6437] do_one_tree+0x30/0xfc [ 57.308817][ T6437] shrink_dcache_for_umount+0xd8/0x188 [ 57.310208][ T6437] generic_shutdown_super+0x68/0x2bc [ 57.311588][ T6437] kill_litter_super+0x74/0xb8 [ 57.312815][ T6437] binderfs_kill_super+0x44/0x9c [ 57.314091][ T6437] deactivate_locked_super+0xc4/0x12c [ 57.315477][ T6437] deactivate_super+0xe0/0x100 [ 57.316708][ T6437] cleanup_mnt+0x34c/0x3dc [ 57.317880][ T6437] __cleanup_mnt+0x20/0x30 [ 57.319022][ T6437] task_work_run+0x230/0x2e0 [ 57.320203][ T6437] do_exit+0x4e8/0x1acc [ 57.321325][ T6437] do_group_exit+0x194/0x22c [ 57.322516][ T6437] get_signal+0x1418/0x1534 [ 57.323687][ T6437] do_signal+0x22c/0x39e4 [ 57.324803][ T6437] do_notify_resume+0x74/0x1f4 [ 57.326054][ T6437] el0_svc+0xac/0x168 [ 57.327137][ T6437] el0t_64_sync_handler+0x84/0x108 [ 57.328474][ T6437] el0t_64_sync+0x198/0x19c [ 57.329650][ T6437]=20 [ 57.330236][ T6437] The buggy address belongs to the object at ffff0000c= 6dd0800 [ 57.330236][ T6437] which belongs to the cache kmalloc-512 of size 512 [ 57.333883][ T6437] The buggy address is located 8 bytes inside of [ 57.333883][ T6437] freed 512-byte region [ffff0000c6dd0800, ffff0000c6= dd0a00) [ 57.337465][ T6437]=20 [ 57.338058][ T6437] The buggy address belongs to the physical page: [ 57.339720][ T6437] page: refcount:0 mapcount:0 mapping:0000000000000000= index:0xffff0000c6dd3000 pfn:0x106dd0 [ 57.342360][ T6437] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_= mapped:0 pincount:0 [ 57.344585][ T6437] anon flags: 0x5ffc00000000040(head|node=3D0|zone=3D2= |lastcpupid=3D0x7ff) [ 57.346663][ T6437] page_type: f5(slab) [ 57.347694][ T6437] raw: 05ffc00000000040 ffff0000c0001c80 0000000000000= 000 0000000000000001 [ 57.349947][ T6437] raw: ffff0000c6dd3000 000000000010000c 00000000f5000= 000 0000000000000000 [ 57.352181][ T6437] head: 05ffc00000000040 ffff0000c0001c80 000000000000= 0000 0000000000000001 [ 57.354462][ T6437] head: ffff0000c6dd3000 000000000010000c 00000000f500= 0000 0000000000000000 [ 57.356780][ T6437] head: 05ffc00000000002 fffffdffc31b7401 ffffffffffff= ffff 0000000000000000 [ 57.359060][ T6437] head: 0000000000000004 0000000000000000 00000000ffff= ffff 0000000000000000 [ 57.361371][ T6437] page dumped because: kasan: bad access detected [ 57.363069][ T6437]=20 [ 57.363674][ T6437] Memory state around the buggy address: [ 57.365143][ T6437] ffff0000c6dd0700: fc fc fc fc fc fc fc fc fc fc fc = fc fc fc fc fc [ 57.367267][ T6437] ffff0000c6dd0780: fc fc fc fc fc fc fc fc fc fc fc = fc fc fc fc fc [ 57.369405][ T6437] >ffff0000c6dd0800: fa fb fb fb fb fb fb fb fb fb fb = fb fb fb fb fb [ 57.371514][ T6437] ^ [ 57.372638][ T6437] ffff0000c6dd0880: fb fb fb fb fb fb fb fb fb fb fb = fb fb fb fb fb [ 57.374759][ T6437] ffff0000c6dd0900: fb fb fb fb fb fb fb fb fb fb fb = fb fb fb fb fb [ 57.376899][ T6437] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [ 57.383599][ T6437] Disabling lock debugging due to kernel taint [ 58.115605][ T4279] wlan0: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 58.117733][ T4279] wlan0: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 58.126718][ T13] wlan1: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 58.128688][ T13] wlan1: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 58.244921][ T6478] chnl_net:caif_netlink_parms(): no params data found [ 58.262999][ T6478] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 58.265000][ T6478] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 58.266851][ T6478] bridge_slave_0: entered allmulticast mode [ 58.268702][ T6478] bridge_slave_0: entered promiscuous mode [ 58.271065][ T6478] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 58.273065][ T6478] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 58.274890][ T6478] bridge_slave_1: entered allmulticast mode [ 58.276725][ T6478] bridge_slave_1: entered promiscuous mode [ 58.284565][ T6478] bond0: (slave bond_slave_0): Enslaving as an active = interface with an up link [ 58.287976][ T6478] bond0: (slave bond_slave_1): Enslaving as an active = interface with an up link [ 58.301618][ T6478] team0: Port device team_slave_0 added [ 58.304562][ T6478] team0: Port device team_slave_1 added [ 58.311150][ T6478] batman_adv: batadv0: Adding interface: batadv_slave_= 0 [ 58.313047][ T6478] batman_adv: batadv0: The MTU of interface batadv_sla= ve_0 is too small (1500) to handle the transport of batman-adv packets. Pac= kets going over this interface will be fragmented on layer2 which could imp= act the performance. Setting the MTU to 1560 would solve the problem. [ 58.319801][ T6478] batman_adv: batadv0: Not using interface batadv_slav= e_0 (retrying later): interface not active [ 58.323279][ T6478] batman_adv: batadv0: Adding interface: batadv_slave_= 1 [ 58.325087][ T6478] batman_adv: batadv0: The MTU of interface batadv_sla= ve_1 is too small (1500) to handle the transport of batman-adv packets. Pac= kets going over this interface will be fragmented on layer2 which could imp= act the performance. Setting the MTU to 1560 would solve the problem. [ 58.331871][ T6478] batman_adv: batadv0: Not using interface batadv_slav= e_1 (retrying later): interface not active [ 58.342983][ T6478] hsr_slave_0: entered promiscuous mode [ 58.344857][ T6478] hsr_slave_1: entered promiscuous mode [ 58.524904][ T6478] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.527825][ T6478] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.531091][ T6478] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.534071][ T6478] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.545093][ T6478] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 58.546954][ T6478] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 58.548836][ T6478] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 58.550658][ T6478] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 58.574099][ T6478] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.579075][ T13] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 58.581405][ T13] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 58.588160][ T6478] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.592344][ T13] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 58.594257][ T13] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 58.604549][ T13] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 58.606435][ T13] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 58.652607][ T6478] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 58.794002][ T6478] veth0_vlan: entered promiscuous mode [ 58.797290][ T6478] veth1_vlan: entered promiscuous mode [ 58.805304][ T6478] veth0_macvtap: entered promiscuous mode [ 58.808030][ T6478] veth1_macvtap: entered promiscuous mode [ 58.812929][ T6478] batman_adv: batadv0: Interface activated: batadv_sla= ve_0 [ 58.816774][ T6478] batman_adv: batadv0: Interface activated: batadv_sla= ve_1 [ 58.819924][ T6478] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 58.822355][ T6478] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 58.824638][ T6478] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 58.826870][ T6478] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 59.181587][ T6504] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > = 1 [ 59.183994][ T6504] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > = 9 [ 59.186180][ T6504] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > = 9 [ 59.188548][ T6504] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > = 4 [ 59.190979][ T6504] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > = 3 [ 59.193973][ T6504] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > = 2 [ 59.553232][ T257] netdevsim netdevsim0 netdevsim3 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 59.653590][ T257] netdevsim netdevsim0 netdevsim2 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:00:59 executed programs: 0 [ 59.716294][ T5990] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > = 1 [ 59.718426][ T5990] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > = 9 [ 59.720378][ T5990] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > = 9 [ 59.722847][ T5990] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > = 4 [ 59.725079][ T5990] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > = 3 [ 59.727126][ T5990] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > = 2 [ 59.742863][ T257] netdevsim netdevsim0 netdevsim1 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 59.781899][ T6514] chnl_net:caif_netlink_parms(): no params data found [ 59.799281][ T6514] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 59.801138][ T6514] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 59.803268][ T6514] bridge_slave_0: entered allmulticast mode [ 59.805074][ T6514] bridge_slave_0: entered promiscuous mode [ 59.807421][ T6514] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 59.809257][ T6514] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 59.811156][ T6514] bridge_slave_1: entered allmulticast mode [ 59.813176][ T6514] bridge_slave_1: entered promiscuous mode [ 59.820939][ T6514] bond0: (slave bond_slave_0): Enslaving as an active = interface with an up link [ 59.824994][ T6514] bond0: (slave bond_slave_1): Enslaving as an active = interface with an up link [ 59.833658][ T6514] team0: Port device team_slave_0 added [ 59.835905][ T6514] team0: Port device team_slave_1 added [ 59.843368][ T6514] batman_adv: batadv0: Adding interface: batadv_slave_= 0 [ 59.845253][ T6514] batman_adv: batadv0: The MTU of interface batadv_sla= ve_0 is too small (1500) to handle the transport of batman-adv packets. Pac= kets going over this interface will be fragmented on layer2 which could imp= act the performance. Setting the MTU to 1560 would solve the problem. [ 59.852280][ T6514] batman_adv: batadv0: Not using interface batadv_slav= e_0 (retrying later): interface not active [ 59.856347][ T6514] batman_adv: batadv0: Adding interface: batadv_slave_= 1 [ 59.858065][ T6514] batman_adv: batadv0: The MTU of interface batadv_sla= ve_1 is too small (1500) to handle the transport of batman-adv packets. Pac= kets going over this interface will be fragmented on layer2 which could imp= act the performance. Setting the MTU to 1560 would solve the problem. [ 59.864869][ T6514] batman_adv: batadv0: Not using interface batadv_slav= e_1 (retrying later): interface not active [ 59.877687][ T6514] hsr_slave_0: entered promiscuous mode [ 59.879458][ T6514] hsr_slave_1: entered promiscuous mode [ 59.881038][ T6514] debugfs: Directory 'hsr0' with parent 'hsr' already = present! [ 59.883460][ T6514] Cannot create hsr debugfs directory [ 61.232999][ T257] netdevsim netdevsim0 netdevsim0 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 61.761844][ T6504] Bluetooth: hci0: command tx timeout [ 62.710778][ T257] bridge_slave_1: left allmulticast mode [ 62.712502][ T257] bridge_slave_1: left promiscuous mode [ 62.714043][ T257] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 62.716970][ T257] bridge_slave_0: left allmulticast mode [ 62.718466][ T257] bridge_slave_0: left promiscuous mode [ 62.719970][ T257] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 63.841936][ T6504] Bluetooth: hci0: command tx timeout [ 64.293085][ T257] bond0 (unregistering): (slave bond_slave_0): Releasi= ng backup interface [ 64.333054][ T257] bond0 (unregistering): (slave bond_slave_1): Releasi= ng backup interface [ 64.392493][ T257] bond0 (unregistering): Released all slaves [ 64.469913][ T257] hsr_slave_0: left promiscuous mode [ 64.472182][ T257] hsr_slave_1: left promiscuous mode [ 64.474029][ T257] batman_adv: batadv0: Interface deactivated: batadv_s= lave_0 [ 64.476001][ T257] batman_adv: batadv0: Removing interface: batadv_slav= e_0 [ 64.478226][ T257] batman_adv: batadv0: Interface deactivated: batadv_s= lave_1 [ 64.480195][ T257] batman_adv: batadv0: Removing interface: batadv_slav= e_1 [ 64.482596][ T2353] ieee802154 phy0 wpan0: encryption failed: -22 [ 64.484280][ T2353] ieee802154 phy1 wpan1: encryption failed: -22 [ 64.486954][ T257] veth1_macvtap: left promiscuous mode [ 64.488498][ T257] veth0_macvtap: left promiscuous mode [ 64.489971][ T257] veth1_vlan: left promiscuous mode [ 64.491353][ T257] veth0_vlan: left promiscuous mode [ 65.921776][ T6504] Bluetooth: hci0: command tx timeout [ 66.482380][ T257] team0 (unregistering): Port device team_slave_1 remo= ved [ 66.683057][ T257] team0 (unregistering): Port device team_slave_0 remo= ved 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'go1.22.7' 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-build1032201832=3D/tmp/go-build -gno-record-gc= c-switches' git status (err=3D) HEAD detached at 6e87cfa299 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 go fmt ./sys/... >/dev/null touch .descriptions GOOS=3Dlinux GOARCH=3Darm64 go build "-ldflags=3D-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D6e87cfa299c98d36e79e8b8718a4126899a3ba2f -X '= github.com/google/syzkaller/prog.gitRevisionDate=3D20250120-133027'" "-tags= =3Dsyz_target syz_os_linux syz_arch_arm64 " -o ./bin/linux_arm64/syz-execpr= og github.com/google/syzkaller/tools/syz-execprog mkdir -p ./bin/linux_arm64 aarch64-linux-gnu-g++ -o ./bin/linux_arm64/syz-executor executor/executor.c= c \ -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-l= arger-than=3D16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-ove= rflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -stati= c-pie -std=3Dc++17 -I. -Iexecutor/_include -DGOOS_linux=3D1 -DGOARCH_arm6= 4=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"6e87cfa299c98d36e79e8b8718a4126899= a3ba2f\" /usr/lib/gcc-cross/aarch64-linux-gnu/12/../../../../aarch64-linux-gnu/bin/l= d: /tmp/ccpnBTge.o: in function `Connection::Connect(char const*, char cons= t*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0xd8): warning: Using 'gethostbyname' in statically linked applicati= ons requires at runtime the shared libraries from the glibc version used fo= r linking Error text is too large and was truncated, full error text is at: https://syzkaller.appspot.com/x/error.txt?x=3D114d043f980000 Tested on: commit: a8dfb216 jfs: add index corruption check to DT_GETPAGE() git tree: https://github.com/kleikamp/linux-shaggy.git jfs-next kernel config: https://syzkaller.appspot.com/x/.config?x=3D2ad2ff9db77be52= 5 dashboard link: https://syzkaller.appspot.com/bug?extid=3Db974bd41515f770c6= 08b compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debia= n) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D16b895e45800= 00