From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CCC2C83F10 for ; Sun, 27 Aug 2023 11:05:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229641AbjH0LEz convert rfc822-to-8bit (ORCPT ); Sun, 27 Aug 2023 07:04:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229647AbjH0LEb (ORCPT ); Sun, 27 Aug 2023 07:04:31 -0400 Received: from mail-pj1-f70.google.com (mail-pj1-f70.google.com [209.85.216.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74D8F109 for ; Sun, 27 Aug 2023 04:04:28 -0700 (PDT) Received: by mail-pj1-f70.google.com with SMTP id 98e67ed59e1d1-26d68b5995dso1804826a91.3 for ; Sun, 27 Aug 2023 04:04:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; 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Sun, 27 Aug 2023 04:04:27 -0700 (PDT) Date: Sun, 27 Aug 2023 04:04:27 -0700 In-Reply-To: <20230827100849.3681-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000997dff0603e58a02@google.com> Subject: Re: [syzbot] [kernfs?] KASAN: slab-use-after-free Read in kernfs_test_super 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: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot tried to test the proposed patch but the build/boot failed: T1] RPL Segment Routing with IPv6 [ 22.153462][ T1] In-situ OAM (IOAM) with IPv6 [ 22.158633][ T1] mip6: Mobile IPv6 [ 22.167745][ T1] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver [ 22.185212][ T1] ip6_gre: GRE over IPv6 tunneling driver [ 22.197237][ T1] NET: Registered PF_PACKET protocol family [ 22.203406][ T1] NET: Registered PF_KEY protocol family [ 22.209481][ T1] Bridge firewalling registered [ 22.214972][ T1] NET: Registered PF_X25 protocol family [ 22.220716][ T1] X25: Linux Version 0.2 [ 22.301783][ T1] NET: Registered PF_NETROM protocol family [ 22.389320][ T1] NET: Registered PF_ROSE protocol family [ 22.395297][ T1] NET: Registered PF_AX25 protocol family [ 22.401145][ T1] can: controller area network core [ 22.407441][ T1] NET: Registered PF_CAN protocol family [ 22.413109][ T1] can: raw protocol [ 22.417186][ T1] can: broadcast manager protocol [ 22.422248][ T1] can: netlink gateway - max_hops=1 [ 22.427654][ T1] can: SAE J1939 [ 22.431196][ T1] can: isotp protocol (max_pdu_size 8300) [ 22.437369][ T1] Bluetooth: RFCOMM TTY layer initialized [ 22.443097][ T1] Bluetooth: RFCOMM socket layer initialized [ 22.449713][ T1] Bluetooth: RFCOMM ver 1.11 [ 22.454468][ T1] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 22.460598][ T1] Bluetooth: BNEP filters: protocol multicast [ 22.467157][ T1] Bluetooth: BNEP socket layer initialized [ 22.472946][ T1] Bluetooth: CMTP (CAPI Emulation) ver 1.0 [ 22.478826][ T1] Bluetooth: CMTP socket layer initialized [ 22.484665][ T1] Bluetooth: HIDP (Human Interface Emulation) ver 1.2 [ 22.491508][ T1] Bluetooth: HIDP socket layer initialized [ 22.502104][ T1] NET: Registered PF_RXRPC protocol family [ 22.508020][ T1] Key type rxrpc registered [ 22.512934][ T1] Key type rxrpc_s registered [ 22.519379][ T1] NET: Registered PF_KCM protocol family [ 22.526198][ T1] lec:lane_module_init: lec.c: initialized [ 22.532235][ T1] mpoa:atm_mpoa_init: mpc.c: initialized [ 22.538764][ T1] l2tp_core: L2TP core driver, V2.0 [ 22.544063][ T1] l2tp_ppp: PPPoL2TP kernel driver, V2.0 [ 22.549753][ T1] l2tp_ip: L2TP IP encapsulation support (L2TPv3) [ 22.556606][ T1] l2tp_netlink: L2TP netlink interface [ 22.562260][ T1] l2tp_eth: L2TP ethernet pseudowire support (L2TPv3) [ 22.569431][ T1] l2tp_ip6: L2TP IP encapsulation support for IPv6 (L2TPv3) [ 22.577749][ T1] NET: Registered PF_PHONET protocol family [ 22.584800][ T1] 8021q: 802.1Q VLAN Support v1.8 [ 22.608369][ T1] DCCP: Activated CCID 2 (TCP-like) [ 22.614078][ T1] DCCP: Activated CCID 3 (TCP-Friendly Rate Control) [ 22.621209][ T1] DCCP is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list [ 22.632363][ T1] sctp: Hash tables configured (bind 32/56) [ 22.641253][ T1] NET: Registered PF_RDS protocol family [ 22.647757][ T1] Registered RDS/infiniband transport [ 22.653720][ T1] Registered RDS/tcp transport [ 22.658688][ T1] tipc: Activated (version 2.0.0) [ 22.664367][ T1] NET: Registered PF_TIPC protocol family [ 22.670831][ T1] tipc: Started in single node mode [ 22.676860][ T1] NET: Registered PF_SMC protocol family [ 22.682686][ T1] 9pnet: Installing 9P2000 support [ 22.688768][ T1] NET: Registered PF_CAIF protocol family [ 22.702700][ T1] NET: Registered PF_IEEE802154 protocol family [ 22.710080][ T1] Key type dns_resolver registered [ 22.715485][ T1] Key type ceph registered [ 22.720499][ T1] libceph: loaded (mon/osd proto 15/24) [ 22.728520][ T1] batman_adv: B.A.T.M.A.N. advanced 2023.3 (compatibility version 15) loaded [ 22.737761][ T1] openvswitch: Open vSwitch switching datapath [ 22.747749][ T1] NET: Registered PF_VSOCK protocol family [ 22.753909][ T1] mpls_gso: MPLS GSO support [ 22.767156][ T1] start plist test [ 22.776649][ T1] end plist test [ 22.789647][ T1] IPI shorthand broadcast: enabled [ 22.795205][ T1] AVX2 version of gcm_enc/dec engaged. [ 22.800844][ T1] AES CTR mode by8 optimization enabled [ 24.946860][ T1] sched_clock: Marking stable (24900021811, 44080130)->(24947471898, -3369957) [ 24.963256][ T1] registered taskstats version 1 [ 24.991977][ T1] Loading compiled-in X.509 certificates [ 25.002988][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 6ff01a4b96c932563103f4d4fff2d5d5224413d4' [ 25.018103][ T1] zswap: loaded using pool lzo/zbud [ 25.254541][ T1] debug_vm_pgtable: [debug_vm_pgtable ]: Validating architecture page table helpers [ 28.206068][ T1] Key type .fscrypt registered [ 28.210844][ T1] Key type fscrypt-provisioning registered [ 28.225620][ T1] kAFS: Red Hat AFS client v0.1 registering. [ 28.251109][ T1] Btrfs loaded, assert=on, ref-verify=on, zoned=yes, fsverity=yes [ 28.259400][ T1] Key type big_key registered [ 28.266816][ T1] Key type encrypted registered [ 28.271690][ T1] AppArmor: AppArmor sha1 policy hashing enabled [ 28.278086][ T1] ima: No TPM chip found, activating TPM-bypass! [ 28.284455][ T1] Loading compiled-in module X.509 certificates [ 28.295355][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 6ff01a4b96c932563103f4d4fff2d5d5224413d4' [ 28.306295][ T1] ima: Allocated hash algorithm: sha256 [ 28.311992][ T1] ima: No architecture policies found [ 28.317903][ T1] evm: Initialising EVM extended attributes: [ 28.323988][ T1] evm: security.selinux (disabled) [ 28.329111][ T1] evm: security.SMACK64 (disabled) [ 28.334298][ T1] evm: security.SMACK64EXEC (disabled) [ 28.340638][ T1] evm: security.SMACK64TRANSMUTE (disabled) [ 28.346557][ T1] evm: security.SMACK64MMAP (disabled) [ 28.352203][ T1] evm: security.apparmor [ 28.356464][ T1] evm: security.ima [ 28.360293][ T1] evm: security.capability [ 28.364715][ T1] evm: HMAC attrs: 0x1 [ 28.371158][ T1] PM: Magic number: 3:991:932 [ 28.379710][ T1] printk: console [netcon0] enabled [ 28.384982][ T1] netconsole: network logging started [ 28.390833][ T1] gtp: GTP module loaded (pdp ctx size 104 bytes) [ 28.398542][ T1] rdma_rxe: loaded [ 28.403224][ T1] cfg80211: Loading compiled-in X.509 certificates for regulatory database [ 28.415177][ T1] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7' [ 28.423103][ T54] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 [ 28.432796][ T54] platform regulatory.0: Falling back to sysfs fallback for: regulatory.db [ 28.442788][ T1] clk: Disabling unused clocks [ 28.448246][ T1] ALSA device list: [ 28.452320][ T1] #0: Dummy 1 [ 28.456220][ T1] #1: Loopback 1 [ 28.459931][ T1] #2: Virtual MIDI Card 1 [ 28.466828][ T1] md: Waiting for all devices to be available before autodetect [ 28.474753][ T1] md: If you don't use raid, use raid=noautodetect [ 28.481592][ T1] md: Autodetecting RAID arrays. [ 28.486591][ T1] md: autorun ... [ 28.490209][ T1] md: ... autorun DONE. [ 28.550861][ T1] EXT4-fs (sda1): mounted filesystem 5941fea2-f5fa-4b4e-b5ef-9af118b27b95 ro with ordered data mode. Quota mode: none. [ 28.563733][ T1] VFS: Mounted root (ext4 filesystem) readonly on device 8:1. [ 28.584466][ T1] devtmpfs: mounted [ 28.752930][ T1] Freeing unused kernel image (initmem) memory: 3396K [ 28.759784][ T1] Write protecting the kernel read-only data: 188416k [ 28.769443][ T1] Freeing unused kernel image (rodata/data gap) memory: 700K [ 28.896155][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages found. [ 28.908769][ T1] Failed to set sysctl parameter 'max_rcu_stall_to_panic=1': parameter not found [ 28.918782][ T1] Run /sbin/init as init process [ 28.923727][ T1] with arguments: [ 28.927591][ T1] /sbin/init [ 28.931132][ T1] with environment: [ 28.935216][ T1] HOME=/ [ 28.938421][ T1] TERM=linux [ 28.941948][ T1] spec_store_bypass_disable=prctl [ 28.947789][ T1] BOOT_IMAGE=/boot/bzImage [ 29.033669][ T1] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 29.045504][ T1] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 29.053923][ T1] CPU: 1 PID: 1 Comm: init Not tainted 6.5.0-rc7-next-20230822-syzkaller-dirty #0 [ 29.063122][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 29.073176][ T1] RIP: 0010:do_raw_spin_lock+0x6e/0x2b0 [ 29.078757][ T1] Code: 81 48 8d 54 05 00 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 65 48 8b 14 25 28 00 00 00 48 89 54 24 60 31 d2 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e3 [ 29.098364][ T1] RSP: 0000:ffffc90000067b28 EFLAGS: 00010247 [ 29.104512][ T1] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 29.112477][ T1] RDX: 0000000000000000 RSI: ffffffff8ae8fc60 RDI: 0000000000000004 [ 29.120616][ T1] RBP: 1ffff9200000cf66 R08: 0000000000000000 R09: fffffbfff1d9ba3a [ 29.128598][ T1] R10: ffffffff8ecdd1d7 R11: ffffffff8a3cdc9d R12: 0000000000000000 [ 29.136743][ T1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000680000 [ 29.144714][ T1] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 29.153649][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.160258][ T1] CR2: 00007ffc17ddb229 CR3: 0000000026fb0000 CR4: 00000000003506e0 [ 29.168335][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.176321][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.184297][ T1] Call Trace: [ 29.187574][ T1] [ 29.190504][ T1] ? show_regs+0x8f/0xa0 [ 29.194762][ T1] ? die_addr+0x4f/0xd0 [ 29.198926][ T1] ? exc_general_protection+0x154/0x230 [ 29.204761][ T1] ? asm_exc_general_protection+0x26/0x30 [ 29.210679][ T1] ? syscall_exit_to_user_mode+0x1d/0x60 [ 29.216327][ T1] ? do_raw_spin_lock+0x6e/0x2b0 [ 29.221382][ T1] ? spin_bug+0x1d0/0x1d0 [ 29.225722][ T1] ? lock_release+0x4bf/0x680 [ 29.230413][ T1] ? dput+0x251/0xfd0 [ 29.234447][ T1] list_lru_add+0xce/0x540 [ 29.238877][ T1] ? dput+0x39/0xfd0 [ 29.243068][ T1] dput+0x87f/0xfd0 [ 29.246888][ T1] proc_kill_sb+0x6d/0x100 [ 29.251320][ T1] deactivate_locked_super+0x19c/0x2d0 [ 29.256793][ T1] deactivate_super+0xde/0x100 [ 29.261580][ T1] cleanup_mnt+0x222/0x3d0 [ 29.266442][ T1] mntput_no_expire+0x864/0xbc0 [ 29.271303][ T1] ? do_raw_spin_unlock+0x173/0x230 [ 29.276528][ T1] ? _raw_spin_unlock+0x28/0x40 [ 29.281394][ T1] ? mnt_get_count+0x1e0/0x1e0 [ 29.286165][ T1] ? _raw_spin_unlock+0x28/0x40 [ 29.291024][ T1] mntput+0x6b/0x90 [ 29.294874][ T1] __fput+0x560/0xa70 [ 29.298875][ T1] task_work_run+0x14d/0x240 [ 29.303486][ T1] ? task_work_cancel+0x30/0x30 [ 29.308359][ T1] ? kernel_execve+0x3f9/0x4e0 [ 29.313223][ T1] exit_to_user_mode_prepare+0x210/0x240 [ 29.318874][ T1] syscall_exit_to_user_mode+0x1d/0x60 [ 29.324339][ T1] ? rest_init+0x2b0/0x2b0 [ 29.328762][ T1] ret_from_fork_asm+0x11/0x20 [ 29.333545][ T1] [ 29.336557][ T1] Modules linked in: [ 29.340653][ T1] ---[ end trace 0000000000000000 ]--- [ 29.346320][ T1] RIP: 0010:do_raw_spin_lock+0x6e/0x2b0 [ 29.351867][ T1] Code: 81 48 8d 54 05 00 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 65 48 8b 14 25 28 00 00 00 48 89 54 24 60 31 d2 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e3 [ 29.371529][ T1] RSP: 0000:ffffc90000067b28 EFLAGS: 00010247 [ 29.380525][ T1] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 29.388593][ T1] RDX: 0000000000000000 RSI: ffffffff8ae8fc60 RDI: 0000000000000004 [ 29.396657][ T1] RBP: 1ffff9200000cf66 R08: 0000000000000000 R09: fffffbfff1d9ba3a [ 29.405013][ T1] R10: ffffffff8ecdd1d7 R11: ffffffff8a3cdc9d R12: 0000000000000000 [ 29.413142][ T1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000680000 [ 29.421293][ T1] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 29.430837][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.437428][ T1] CR2: 00007ffc17ddb229 CR3: 0000000026fb0000 CR4: 00000000003506e0 [ 29.445508][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.453478][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.461546][ T1] Kernel panic - not syncing: Fatal exception [ 29.467789][ T1] Kernel Offset: disabled [ 29.472099][ T1] Rebooting in 86400 seconds.. syzkaller build log: go env (err=) GO111MODULE="auto" GOARCH="amd64" GOBIN="" GOCACHE="/syzkaller/.cache/go-build" GOENV="/syzkaller/.config/go/env" GOEXE="" GOEXPERIMENT="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="linux" GOINSECURE="" GOMODCACHE="/syzkaller/jobs-2/linux/gopath/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="linux" GOPATH="/syzkaller/jobs-2/linux/gopath" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/usr/local/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64" GOVCS="" GOVERSION="go1.20.1" GCCGO="gccgo" GOAMD64="v1" AR="ar" CC="gcc" CXX="g++" CGO_ENABLED="1" GOMOD="/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod" GOWORK="" CGO_CFLAGS="-O2 -g" CGO_CPPFLAGS="" CGO_CXXFLAGS="-O2 -g" CGO_FFLAGS="-O2 -g" CGO_LDFLAGS="-O2 -g" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build503812671=/tmp/go-build -gno-record-gcc-switches" git status (err=) HEAD detached at b81ca3f66 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:32: run command via tools/syz-env for best compatibility, see: Makefile:33: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen make .descriptions tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified bin/syz-sysgen touch .descriptions GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=b81ca3f66f8d2d8b397c3c1dc5f14e77c2936b1e -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230822-122036'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=b81ca3f66f8d2d8b397c3c1dc5f14e77c2936b1e -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230822-122036'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=b81ca3f66f8d2d8b397c3c1dc5f14e77c2936b1e -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230822-122036'" "-tags=syz_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 -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \ -DHOSTGOOS_linux=1 -DGIT_REVISION=\"b81ca3f66f8d2d8b397c3c1dc5f14e77c2936b1e\" Error text is too large and was truncated, full error text is at: https://syzkaller.appspot.com/x/error.txt?x=11f109eba80000 Tested on: commit: 28c736b0 Add linux-next specific files for 20230822 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git kernel config: https://syzkaller.appspot.com/x/.config?x=20999f779fa96017 dashboard link: https://syzkaller.appspot.com/bug?extid=f25c61df1ec3d235d52f compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=159e79b0680000