Message-ID: <69328d43.050a0220.3a66f.0000.GAE@google.com>
Date: Thu, 04 Dec 2025 23:44:03 -0800
From: syzbot <syzbot+99f6ed51479b86ac4c41@...kaller.appspotmail.com>
To: kartikey406@...il.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [hfs?] memory leak in hfsplus_init_fs_context

Hello,

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

SYZFAIL: failed to recv rpc

SYZFAIL: failed to recv rpc


Warning: Permanently added '10.128.1.150' (ED25519) to the list of known hosts.
2025/12/05 07:43:31 parsed 1 programs
[   44.042808][ T5812] cgroup: Unknown subsys name 'net'
[   44.127074][ T5812] cgroup: Unknown subsys name 'cpuset'
[   44.133650][ T5812] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   52.645880][ T5812] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   54.143312][ T5821] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@...ck.org if you depend on this functionality.
[   54.299791][  T133] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   54.309905][  T133] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   54.320511][   T62] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   54.328915][   T62] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   54.497265][   T50] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   54.504519][   T50] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   54.511943][   T50] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   54.525287][   T50] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   54.532574][   T50] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   54.725582][ T5877] chnl_net:caif_netlink_parms(): no params data found
[   54.747201][ T5877] bridge0: port 1(bridge_slave_0) entered blocking state
[   54.754361][ T5877] bridge0: port 1(bridge_slave_0) entered disabled state
[   54.762220][ T5877] bridge_slave_0: entered allmulticast mode
[   54.768738][ T5877] bridge_slave_0: entered promiscuous mode
[   54.775347][ T5877] bridge0: port 2(bridge_slave_1) entered blocking state
[   54.782475][ T5877] bridge0: port 2(bridge_slave_1) entered disabled state
[   54.789704][ T5877] bridge_slave_1: entered allmulticast mode
[   54.796084][ T5877] bridge_slave_1: entered promiscuous mode
[   54.818263][ T5877] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   54.828255][ T5877] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   54.841814][ T5877] team0: Port device team_slave_0 added
[   54.848131][ T5877] team0: Port device team_slave_1 added
[   54.859765][ T5877] batman_adv: batadv0: Adding interface: batadv_slave_0
[   54.867269][ T5877] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[   54.895194][ T5877] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   54.906753][ T5877] batman_adv: batadv0: Adding interface: batadv_slave_1
[   54.913711][ T5877] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[   54.940364][ T5877] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   54.959931][ T5877] hsr_slave_0: entered promiscuous mode
[   54.966029][ T5877] hsr_slave_1: entered promiscuous mode
[   55.003186][ T5877] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   55.011384][ T5877] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   55.019230][ T5877] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   55.027232][ T5877] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   55.039665][ T5877] bridge0: port 2(bridge_slave_1) entered blocking state
[   55.046885][ T5877] bridge0: port 2(bridge_slave_1) entered forwarding state
[   55.054350][ T5877] bridge0: port 1(bridge_slave_0) entered blocking state
[   55.061870][ T5877] bridge0: port 1(bridge_slave_0) entered forwarding state
[   55.080653][ T5877] 8021q: adding VLAN 0 to HW filter on device bond0
[   55.090452][  T133] bridge0: port 1(bridge_slave_0) entered disabled state
[   55.098390][  T133] bridge0: port 2(bridge_slave_1) entered disabled state
[   55.108313][ T5877] 8021q: adding VLAN 0 to HW filter on device team0
[   55.117493][  T133] bridge0: port 1(bridge_slave_0) entered blocking state
[   55.124594][  T133] bridge0: port 1(bridge_slave_0) entered forwarding state
[   55.133971][   T12] bridge0: port 2(bridge_slave_1) entered blocking state
[   55.141600][   T12] bridge0: port 2(bridge_slave_1) entered forwarding state
[   55.186705][ T5877] 8021q: adding VLAN 0 to HW filter on device batadv0
[   55.202568][ T5877] veth0_vlan: entered promiscuous mode
[   55.209710][ T5877] veth1_vlan: entered promiscuous mode
[   55.221357][ T5877] veth0_macvtap: entered promiscuous mode
[   55.228585][ T5877] veth1_macvtap: entered promiscuous mode
[   55.237919][ T5877] batman_adv: batadv0: Interface activated: batadv_slave_0
[   55.248299][ T5877] batman_adv: batadv0: Interface activated: batadv_slave_1
[   55.257538][   T58] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   55.266627][   T58] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   55.275497][   T58] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   55.284859][   T58] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   55.320966][   T62] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   55.369319][   T62] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   55.447100][   T62] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   55.467896][   T62] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
2025/12/05 07:43:45 executed programs: 0
[   58.410697][   T62] bridge_slave_1: left allmulticast mode
[   58.416833][   T62] bridge_slave_1: left promiscuous mode
[   58.422540][   T62] bridge0: port 2(bridge_slave_1) entered disabled state
[   58.431389][   T62] bridge_slave_0: left allmulticast mode
[   58.437607][   T62] bridge_slave_0: left promiscuous mode
[   58.443411][   T62] bridge0: port 1(bridge_slave_0) entered disabled state
[   58.509109][   T62] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[   58.518647][   T62] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[   58.528253][   T62] bond0 (unregistering): Released all slaves
[   58.608647][   T62] hsr_slave_0: left promiscuous mode
[   58.614815][   T62] hsr_slave_1: left promiscuous mode
[   58.621461][   T62] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[   58.629526][   T62] batman_adv: batadv0: Removing interface: batadv_slave_0
[   58.637346][   T62] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[   58.644977][   T62] batman_adv: batadv0: Removing interface: batadv_slave_1
[   58.653724][   T62] veth1_macvtap: left promiscuous mode
[   58.659468][   T62] veth0_macvtap: left promiscuous mode
[   58.665187][   T62] veth1_vlan: left promiscuous mode
[   58.670728][   T62] veth0_vlan: left promiscuous mode
[   58.701020][   T62] team0 (unregistering): Port device team_slave_1 removed
[   58.709272][   T62] team0 (unregistering): Port device team_slave_0 removed
[   61.343108][ T5134] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   61.350405][ T5134] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   61.357820][ T5134] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   61.365394][ T5134] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   61.373014][ T5134] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   61.410932][ T5987] chnl_net:caif_netlink_parms(): no params data found
[   61.431401][ T5987] bridge0: port 1(bridge_slave_0) entered blocking state
[   61.438773][ T5987] bridge0: port 1(bridge_slave_0) entered disabled state
[   61.446357][ T5987] bridge_slave_0: entered allmulticast mode
[   61.452606][ T5987] bridge_slave_0: entered promiscuous mode
[   61.459577][ T5987] bridge0: port 2(bridge_slave_1) entered blocking state
[   61.466850][ T5987] bridge0: port 2(bridge_slave_1) entered disabled state
[   61.474214][ T5987] bridge_slave_1: entered allmulticast mode
[   61.480620][ T5987] bridge_slave_1: entered promiscuous mode
[   61.492762][ T5987] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   61.502926][ T5987] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   61.517255][ T5987] team0: Port device team_slave_0 added
[   61.523465][ T5987] team0: Port device team_slave_1 added
[   61.533816][ T5987] batman_adv: batadv0: Adding interface: batadv_slave_0
[   61.541096][ T5987] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[   61.568438][ T5987] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   61.579932][ T5987] batman_adv: batadv0: Adding interface: batadv_slave_1
[   61.586999][ T5987] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[   61.613994][ T5987] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   61.631616][ T5987] hsr_slave_0: entered promiscuous mode
[   61.637415][ T5987] hsr_slave_1: entered promiscuous mode
[   61.807060][ T5987] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   61.815018][ T5987] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   61.823175][ T5987] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   61.831557][ T5987] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   61.852955][ T5987] bridge0: port 2(bridge_slave_1) entered blocking state
[   61.860270][ T5987] bridge0: port 2(bridge_slave_1) entered forwarding state
[   61.867863][ T5987] bridge0: port 1(bridge_slave_0) entered blocking state
[   61.875026][ T5987] bridge0: port 1(bridge_slave_0) entered forwarding state
[   61.898612][ T5987] 8021q: adding VLAN 0 to HW filter on device bond0
[   61.909150][   T12] bridge0: port 1(bridge_slave_0) entered disabled state
[   61.917188][   T12] bridge0: port 2(bridge_slave_1) entered disabled state
[   61.927534][ T5987] 8021q: adding VLAN 0 to HW filter on device team0
[   61.938143][   T58] bridge0: port 1(bridge_slave_0) entered blocking state
[   61.945307][   T58] bridge0: port 1(bridge_slave_0) entered forwarding state
[   61.958922][   T12] bridge0: port 2(bridge_slave_1) entered blocking state
[   61.966035][   T12] bridge0: port 2(bridge_slave_1) entered forwarding state
[   61.982882][ T5987] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[   61.994284][ T5987] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[   62.053394][ T5987] 8021q: adding VLAN 0 to HW filter on device batadv0
[   62.072926][ T5987] veth0_vlan: entered promiscuous mode
[   62.081131][ T5987] veth1_vlan: entered promiscuous mode
[   62.095259][ T5987] veth0_macvtap: entered promiscuous mode
[   62.103071][ T5987] veth1_macvtap: entered promiscuous mode
[   62.114171][ T5987] batman_adv: batadv0: Interface activated: batadv_slave_0
[   62.124750][ T5987] batman_adv: batadv0: Interface activated: batadv_slave_1
[   62.135106][   T58] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   62.148659][   T58] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   62.160564][   T58] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   62.181317][   T58] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   62.191067][   T62] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
SYZFAIL: failed to recv rpc
[   62.202944][   T62] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   62.215016][   T58] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   62.223739][   T58] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50


syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build282997806=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
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'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'

git status (err=<nil>)
HEAD detached at d6526ea3e6
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}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115"  ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115"  ./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
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115"  -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   -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"d6526ea3e6ad9081c902859bbb80f9f840377cb4\"
/usr/bin/ld: /tmp/ccoqPmtJ.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
./tools/check-syzos.sh 2>/dev/null



Tested on:

commit:         2061f18a Merge tag 'caps-pr-20251204' of git://git.ker..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=4ec6d85125e91f07
dashboard link: https://syzkaller.appspot.com/bug?extid=99f6ed51479b86ac4c41
compiler:       gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1497b01a580000

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