Message-ID: <6706d097.050a0220.1139e6.000a.GAE@google.com>
Date: Wed, 09 Oct 2024 11:51:03 -0700
From: syzbot <syzbot+cee29f5a48caf10cd475@...kaller.appspotmail.com>
To: eadavis@...com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [btrfs?] general protection fault in getname_kernel (2)

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

s2_ap_driver
[   10.319275][    T1] comedi: version 0.7.76 - http://www.comedi.org
[   10.322568][    T1] usbcore: registered new interface driver dt9812
[   10.325416][    T1] usbcore: registered new interface driver ni6501
[   10.327201][    T1] usbcore: registered new interface driver usbdux
[   10.329379][    T1] usbcore: registered new interface driver usbduxfast
[   10.332121][    T1] usbcore: registered new interface driver usbduxsigma
[   10.334088][    T1] usbcore: registered new interface driver vmk80xx
[   10.337211][    T1] usbcore: registered new interface driver r8712u
[   10.338343][    T1] greybus: registered new driver hid
[   10.340298][    T1] greybus: registered new driver gbphy
[   10.341827][    T1] gb_gbphy: registered new driver usb
[   10.349219][    T1] asus_wmi: ASUS WMI generic driver loaded
[   10.361679][    T1] gnss: GNSS driver registered with major 493
[   10.368815][    T1] usbcore: registered new interface driver gnss-usb
[   10.370709][    T1] usbcore: registered new interface driver hdm_usb
[   10.444816][    T1] usbcore: registered new interface driver snd-usb-audio
[   10.448305][    T1] usbcore: registered new interface driver snd-ua101
[   10.450555][    T1] usbcore: registered new interface driver snd-usb-usx2y
[   10.452954][    T1] usbcore: registered new interface driver snd-usb-us122l
[   10.454894][    T1] usbcore: registered new interface driver snd-usb-caiaq
[   10.456790][    T1] usbcore: registered new interface driver snd-usb-6fire
[   10.458789][    T1] usbcore: registered new interface driver snd-usb-hiface
[   10.460996][    T1] usbcore: registered new interface driver snd-bcd2000
[   10.463111][    T1] usbcore: registered new interface driver snd_usb_pod
[   10.466398][    T1] usbcore: registered new interface driver snd_usb_podhd
[   10.468273][    T1] usbcore: registered new interface driver snd_usb_toneport
[   10.469725][    T1] usbcore: registered new interface driver snd_usb_variax
[   10.474004][    T1] drop_monitor: Initializing network drop monitor service
[   10.476401][    T1] NET: Registered PF_LLC protocol family
[   10.477481][    T1] GACT probability on
[   10.478257][    T1] Mirror/redirect action on
[   10.479172][    T1] Simple TC action Loaded
[   10.482782][    T1] netem: version 1.3
[   10.483673][    T1] u32 classifier
[   10.484180][    T1]     Performance counters on
[   10.484834][    T1]     input device check on
[   10.486023][    T1]     Actions configured
[   10.489157][    T1] nf_conntrack_irc: failed to register helpers
[   10.490084][    T1] nf_conntrack_sane: failed to register helpers
[   10.598437][    T1] nf_conntrack_sip: failed to register helpers
[   10.604205][ T2709] kworker/u8:5 (2709) used greatest stack depth: 24784 bytes left
[   10.604399][    T1] xt_time: kernel timezone is -0000
[   10.606687][    T1] IPVS: Registered protocols (TCP, UDP, SCTP, AH, ESP)
[   10.607753][    T1] IPVS: Connection hash table configured (size=4096, memory=32Kbytes)
[   10.609718][    T1] IPVS: ipvs loaded.
[   10.610454][    T1] IPVS: [rr] scheduler registered.
[   10.611224][    T1] IPVS: [wrr] scheduler registered.
[   10.612068][    T1] IPVS: [lc] scheduler registered.
[   10.612780][    T1] IPVS: [wlc] scheduler registered.
[   10.613556][    T1] IPVS: [fo] scheduler registered.
[   10.614304][    T1] IPVS: [ovf] scheduler registered.
[   10.615149][    T1] IPVS: [lblc] scheduler registered.
[   10.615886][    T1] IPVS: [lblcr] scheduler registered.
[   10.616665][    T1] IPVS: [dh] scheduler registered.
[   10.617614][    T1] IPVS: [sh] scheduler registered.
[   10.618521][    T1] IPVS: [mh] scheduler registered.
[   10.619321][    T1] IPVS: [sed] scheduler registered.
[   10.620373][    T1] IPVS: [nq] scheduler registered.
[   10.621182][    T1] IPVS: [twos] scheduler registered.
[   10.622179][    T1] IPVS: [sip] pe registered.
[   10.623331][    T1] ipip: IPv4 and MPLS over IPv4 tunneling driver
[   10.627241][    T1] gre: GRE over IPv4 demultiplexor driver
[   10.628252][    T1] ip_gre: GRE over IPv4 tunneling driver
[   10.637645][    T1] IPv4 over IPsec tunneling driver
[   10.641661][    T1] Initializing XFRM netlink socket
[   10.642642][    T1] IPsec XFRM device driver
[   10.643733][    T1] NET: Registered PF_INET6 protocol family
[   10.656555][    T1] Segment Routing with IPv6
[   10.657375][    T1] RPL Segment Routing with IPv6
[   10.658370][    T1] In-situ OAM (IOAM) with IPv6
[   10.659392][    T1] mip6: Mobile IPv6
[   10.663271][    T1] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[   10.670008][    T1] ip6_gre: GRE over IPv6 tunneling driver
[   10.674292][    T1] NET: Registered PF_PACKET protocol family
[   10.676334][    T1] NET: Registered PF_KEY protocol family
[   10.677683][    T1] Bridge firewalling registered
[   10.679324][    T1] NET: Registered PF_X25 protocol family
[   10.680368][    T1] X25: Linux Version 0.2
[   10.716733][    T1] NET: Registered PF_NETROM protocol family
[   10.753122][    T1] NET: Registered PF_ROSE protocol family
[   10.754387][    T1] NET: Registered PF_AX25 protocol family
[   10.757938][    T1] can: controller area network core
[   10.758970][    T1] NET: Registered PF_CAN protocol family
[   10.759924][    T1] can: raw protocol
[   10.760534][    T1] can: broadcast manager protocol
[   10.761312][    T1] can: netlink gateway - max_hops=1
[   10.762339][    T1] can: SAE J1939
[   10.762919][    T1] can: isotp protocol (max_pdu_size 8300)
[   10.764278][    T1] Bluetooth: RFCOMM TTY layer initialized
[   10.767642][    T1] Bluetooth: RFCOMM socket layer initialized
[   10.768787][    T1] Bluetooth: RFCOMM ver 1.11
[   10.769560][    T1] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   10.770537][    T1] Bluetooth: BNEP filters: protocol multicast
[   10.771518][    T1] Bluetooth: BNEP socket layer initialized
[   10.772349][    T1] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[   10.773324][    T1] Bluetooth: HIDP socket layer initialized
[   10.778406][    T1] NET: Registered PF_RXRPC protocol family
[   10.779406][    T1] Key type rxrpc registered
[   10.780204][    T1] Key type rxrpc_s registered
[   10.781608][    T1] NET: Registered PF_KCM protocol family
[   10.783775][    T1] lec:lane_module_init: lec.c: initialized
[   10.784692][    T1] mpoa:atm_mpoa_init: mpc.c: initialized
[   10.785946][    T1] l2tp_core: L2TP core driver, V2.0
[   10.786934][    T1] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[   10.787969][    T1] l2tp_ip: L2TP IP encapsulation support (L2TPv3)
[   10.789031][    T1] l2tp_netlink: L2TP netlink interface
[   10.789899][    T1] l2tp_eth: L2TP ethernet pseudowire support (L2TPv3)
[   10.790827][    T1] l2tp_ip6: L2TP IP encapsulation support for IPv6 (L2TPv3)
[   10.792073][    T1] NET: Registered PF_PHONET protocol family
[   10.793120][    T1] 8021q: 802.1Q VLAN Support v1.8
[   10.808908][    T1] DCCP: Activated CCID 2 (TCP-like)
[   10.814230][    T1] DCCP: Activated CCID 3 (TCP-Friendly Rate Control)
[   10.821673][    T1] DCCP is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list
[   10.832766][    T1] sctp: Hash tables configured (bind 32/56)
[   10.840557][    T1] NET: Registered PF_RDS protocol family
[   10.847237][    T1] Registered RDS/infiniband transport
[   10.853730][    T1] Registered RDS/tcp transport
[   10.858656][    T1] tipc: Activated (version 2.0.0)
[   10.864431][    T1] NET: Registered PF_TIPC protocol family
[   10.871052][    T1] tipc: Started in single node mode
[   10.877071][    T1] NET: Registered PF_SMC protocol family
[   10.883181][    T1] 9pnet: Installing 9P2000 support
[   10.888922][    T1] NET: Registered PF_CAIF protocol family
[   10.898506][    T1] NET: Registered PF_IEEE802154 protocol family
[   10.905068][    T1] Key type dns_resolver registered
[   10.910312][    T1] Key type ceph registered
[   10.915415][    T1] libceph: loaded (mon/osd proto 15/24)
[   10.922141][    T1] batman_adv: B.A.T.M.A.N. advanced 2024.2 (compatibility version 15) loaded
[   10.931398][    T1] openvswitch: Open vSwitch switching datapath
[   10.939441][    T1] NET: Registered PF_VSOCK protocol family
[   10.945999][    T1] mpls_gso: MPLS GSO support
[   10.967691][    T1] IPI shorthand broadcast: enabled
[   10.973087][    T1] AES CTR mode by8 optimization enabled
[   12.104613][    T1] sched_clock: Marking stable (12060025057, 34932274)->(12093279688, 1677643)
[   12.119544][    T1] registered taskstats version 1
[   12.141500][    T1] Loading compiled-in X.509 certificates
[   12.199712][    T1] Loaded X.509 cert 'Build time autogenerated kernel key: 34511b135d2758a08a46bc4f061ab8667a62b201'
[   12.396949][    T1] zswap: loaded using pool 842/z3fold
[   12.404836][    T1] Demotion targets for Node 0: null
[   12.410189][    T1] Demotion targets for Node 1: null
[   12.415469][    T1] debug_vm_pgtable: [debug_vm_pgtable         ]: Validating architecture page table helpers
[   14.168414][    T1] Key type .fscrypt registered
[   14.173201][    T1] Key type fscrypt-provisioning registered
[   14.184392][    T1] kAFS: Red Hat AFS client v0.1 registering.
[   14.207263][    T1] Btrfs loaded, assert=on, ref-verify=on, zoned=yes, fsverity=yes
[   14.215931][    T1] Key type big_key registered
[   14.229036][    T1] Key type encrypted registered
[   14.233923][    T1] AppArmor: AppArmor sha256 policy hashing enabled
[   14.240771][    T1] ima: No TPM chip found, activating TPM-bypass!
[   14.247197][    T1] Loading compiled-in module X.509 certificates
[   14.271408][    T1] Loaded X.509 cert 'Build time autogenerated kernel key: 34511b135d2758a08a46bc4f061ab8667a62b201'
[   14.282261][    T1] ima: Allocated hash algorithm: sha256
[   14.288286][    T1] ima: No architecture policies found
[   14.294068][    T1] evm: Initialising EVM extended attributes:
[   14.300089][    T1] evm: security.selinux (disabled)
[   14.305769][    T1] evm: security.SMACK64 (disabled)
[   14.310887][    T1] evm: security.SMACK64EXEC (disabled)
[   14.316468][    T1] evm: security.SMACK64TRANSMUTE (disabled)
[   14.322337][    T1] evm: security.SMACK64MMAP (disabled)
[   14.327813][    T1] evm: security.apparmor
[   14.332050][    T1] evm: security.ima
[   14.335873][    T1] evm: security.capability
[   14.340547][    T1] evm: HMAC attrs: 0x1
[   14.347257][    T1] PM:   Magic number: 12:295:746
[   14.353400][    T1] printk: legacy console [netcon0] enabled
[   14.359315][    T1] netconsole: network logging started
[   14.365308][    T1] gtp: GTP module loaded (pdp ctx size 128 bytes)
[   14.375941][    T1] rdma_rxe: loaded
[   14.380278][    T1] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[   14.391416][    T1] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[   14.399964][    T1] Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600'
[   14.409267][  T939] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[   14.418937][    T1] clk: Disabling unused clocks
[   14.419013][  T939] platform regulatory.0: Falling back to sysfs fallback for: regulatory.db
[   14.423899][    T1] ALSA device list:
[   14.436380][    T1]   #0: Dummy 1
[   14.439870][    T1]   #1: Loopback 1
[   14.443576][    T1]   #2: Virtual MIDI Card 1
[   14.451100][    T1] md: Waiting for all devices to be available before autodetect
[   14.458822][    T1] md: If you don't use raid, use raid=noautodetect
[   14.465370][    T1] md: Autodetecting RAID arrays.
[   14.470381][    T1] md: autorun ...
[   14.474008][    T1] md: ... autorun DONE.
[   14.538322][    T1] EXT4-fs (sda1): mounted filesystem b4773fba-1738-4da0-8a90-0fe043d0a496 ro with ordered data mode. Quota mode: none.
[   14.551126][    T1] VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
[   14.578998][    T1] devtmpfs: mounted
[   14.631301][    T1] Freeing unused kernel image (initmem) memory: 26736K
[   14.641332][    T1] Write protecting the kernel read-only data: 219136k
[   14.656226][    T1] Freeing unused kernel image (rodata/data gap) memory: 1100K
[   14.763403][    T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[   14.771313][    T1] x86/mm: Checking user space page tables
[   14.864011][    T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[   14.877068][    T1] Failed to set sysctl parameter 'max_rcu_stall_to_panic=1': parameter not found
[   14.886913][    T1] Run /sbin/init as init process
[   15.655177][ T4652] mount (4652) used greatest stack depth: 23104 bytes left
[   15.709114][ T4653] EXT4-fs (sda1): re-mounted b4773fba-1738-4da0-8a90-0fe043d0a496 r/w. Quota mode: none.
mount: mounting devtmpfs on /dev failed: Device or resource busy
mount: mounting smackfs on /sys/fs/smackfs failed: No such file or directory
mount: mounting selinuxfs on /sys/fs/selinux failed: No such file or directory
[   15.856092][ T4657] mount (4657) used greatest stack depth: 20608 bytes left
Starting syslogd: OK
Starting acpid: [   76.826513][  T939] cfg80211: failed to load regulatory.db


syzkaller build log:
go env (err=<nil>)
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/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.7'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs/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 -ffile-prefix-map=/tmp/go-build1417808173=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 402f1df054
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/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
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
go fmt ./sys/... >/dev/null
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=402f1df054ddb07ed5bb299d08c781354eb06607 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20241007-221845'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/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 -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 -std=c++17 -I. -Iexecutor/_include -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"402f1df054ddb07ed5bb299d08c781354eb06607\"
/usr/bin/ld: /tmp/ccIZFOUJ.o: in function `test_cover_filter()':
executor.cc:(.text+0x1424b): warning: the use of `tempnam' is dangerous, better use `mkstemp'
/usr/bin/ld: /tmp/ccIZFOUJ.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=143537d0580000


Tested on:

commit:         b6270c3b Add linux-next specific files for 20241009
git tree:       linux-next
kernel config:  https://syzkaller.appspot.com/x/.config?x=aa19e8f0089d2704
dashboard link: https://syzkaller.appspot.com/bug?extid=cee29f5a48caf10cd475
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=169837d0580000

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