Message-ID: <69329a9f.050a0220.3a66f.0004.GAE@google.com>
Date: Fri, 05 Dec 2025 00:41:03 -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
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)


Warning: Permanently added '10.128.10.19' (ED25519) to the list of known hosts.
2025/12/05 08:40:16 parsed 1 programs
[   41.176746][ T5819] cgroup: Unknown subsys name 'net'
[   41.281133][ T5819] cgroup: Unknown subsys name 'cpuset'
[   41.287826][ T5819] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   49.291292][ T5819] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   50.564658][ T5831] 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.
[   50.685574][ T5838] chnl_net:caif_netlink_parms(): no params data found
[   50.718744][ T5838] bridge0: port 1(bridge_slave_0) entered blocking state
[   50.726547][ T5838] bridge0: port 1(bridge_slave_0) entered disabled state
[   50.733855][ T5838] bridge_slave_0: entered allmulticast mode
[   50.740422][ T5838] bridge_slave_0: entered promiscuous mode
[   50.749111][ T5838] bridge0: port 2(bridge_slave_1) entered blocking state
[   50.756705][ T5838] bridge0: port 2(bridge_slave_1) entered disabled state
[   50.763860][ T5838] bridge_slave_1: entered allmulticast mode
[   50.770087][ T5838] bridge_slave_1: entered promiscuous mode
[   50.781997][ T5838] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   50.792353][ T5838] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   50.806088][ T5838] team0: Port device team_slave_0 added
[   50.812289][ T5838] team0: Port device team_slave_1 added
[   50.821770][ T5838] batman_adv: batadv0: Adding interface: batadv_slave_0
[   50.828751][ T5838] 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.
[   50.854896][ T5838] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   50.865811][ T5838] batman_adv: batadv0: Adding interface: batadv_slave_1
[   50.872758][ T5838] 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.
[   50.898803][ T5838] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   50.915511][ T5838] hsr_slave_0: entered promiscuous mode
[   50.921517][ T5838] hsr_slave_1: entered promiscuous mode
[   50.950832][ T5838] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   50.958488][ T5838] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   50.966517][ T5838] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   50.974219][ T5838] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   50.985730][ T5838] bridge0: port 2(bridge_slave_1) entered blocking state
[   50.992793][ T5838] bridge0: port 2(bridge_slave_1) entered forwarding state
[   51.000070][ T5838] bridge0: port 1(bridge_slave_0) entered blocking state
[   51.007177][ T5838] bridge0: port 1(bridge_slave_0) entered forwarding state
[   51.024053][ T5838] 8021q: adding VLAN 0 to HW filter on device bond0
[   51.032907][ T2111] bridge0: port 1(bridge_slave_0) entered disabled state
[   51.040759][ T2111] bridge0: port 2(bridge_slave_1) entered disabled state
[   51.050315][ T5838] 8021q: adding VLAN 0 to HW filter on device team0
[   51.059034][ T3542] bridge0: port 1(bridge_slave_0) entered blocking state
[   51.066108][ T3542] bridge0: port 1(bridge_slave_0) entered forwarding state
[   51.075368][ T3868] bridge0: port 2(bridge_slave_1) entered blocking state
[   51.082540][ T3868] bridge0: port 2(bridge_slave_1) entered forwarding state
[   51.123151][ T5838] 8021q: adding VLAN 0 to HW filter on device batadv0
[   51.138305][ T5838] veth0_vlan: entered promiscuous mode
[   51.145381][ T5838] veth1_vlan: entered promiscuous mode
[   51.156259][ T5838] veth0_macvtap: entered promiscuous mode
[   51.163077][ T5838] veth1_macvtap: entered promiscuous mode
[   51.172007][ T5838] batman_adv: batadv0: Interface activated: batadv_slave_0
[   51.181101][ T5838] batman_adv: batadv0: Interface activated: batadv_slave_1
[   51.189797][ T3529] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   51.198817][ T3529] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   51.208219][ T3529] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   51.217671][ T3529] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   51.268245][ T3529] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   51.303208][ T3529] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   51.341444][ T3529] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   51.383323][ T3529] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   51.595715][ T3542] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   51.604091][ T3542] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   51.614717][ T2111] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   51.622702][ T2111] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   51.649068][ T5908] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   51.656254][ T5908] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   51.664039][ T5908] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   51.671332][ T5908] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   51.678641][ T5908] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
2025/12/05 08:40:28 executed programs: 0
[   54.510958][ T3529] bridge_slave_1: left allmulticast mode
[   54.516655][ T3529] bridge_slave_1: left promiscuous mode
[   54.522645][ T3529] bridge0: port 2(bridge_slave_1) entered disabled state
[   54.530202][ T3529] bridge_slave_0: left allmulticast mode
[   54.535912][ T3529] bridge_slave_0: left promiscuous mode
[   54.541823][ T3529] bridge0: port 1(bridge_slave_0) entered disabled state
[   54.582118][ T3529] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[   54.591202][ T3529] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[   54.600240][ T3529] bond0 (unregistering): Released all slaves
[   54.661835][ T3529] hsr_slave_0: left promiscuous mode
[   54.667972][ T3529] hsr_slave_1: left promiscuous mode
[   54.673755][ T3529] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[   54.681245][ T3529] batman_adv: batadv0: Removing interface: batadv_slave_0
[   54.688729][ T3529] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[   54.696292][ T3529] batman_adv: batadv0: Removing interface: batadv_slave_1
[   54.704768][ T3529] veth1_macvtap: left promiscuous mode
[   54.710447][ T3529] veth0_macvtap: left promiscuous mode
[   54.715978][ T3529] veth1_vlan: left promiscuous mode
[   54.721580][ T3529] veth0_vlan: left promiscuous mode
[   54.744259][ T3529] team0 (unregistering): Port device team_slave_1 removed
[   54.752630][ T3529] team0 (unregistering): Port device team_slave_0 removed
[   57.411203][   T51] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   57.418346][   T51] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   57.425415][   T51] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   57.433086][   T51] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   57.440536][   T51] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   57.474037][ T5993] chnl_net:caif_netlink_parms(): no params data found
[   57.492366][ T5993] bridge0: port 1(bridge_slave_0) entered blocking state
[   57.499723][ T5993] bridge0: port 1(bridge_slave_0) entered disabled state
[   57.507823][ T5993] bridge_slave_0: entered allmulticast mode
[   57.514155][ T5993] bridge_slave_0: entered promiscuous mode
[   57.520849][ T5993] bridge0: port 2(bridge_slave_1) entered blocking state
[   57.527889][ T5993] bridge0: port 2(bridge_slave_1) entered disabled state
[   57.535162][ T5993] bridge_slave_1: entered allmulticast mode
[   57.541464][ T5993] bridge_slave_1: entered promiscuous mode
[   57.552191][ T5993] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   57.562247][ T5993] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   57.576766][ T5993] team0: Port device team_slave_0 added
[   57.583104][ T5993] team0: Port device team_slave_1 added
[   57.592907][ T5993] batman_adv: batadv0: Adding interface: batadv_slave_0
[   57.599848][ T5993] 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.
[   57.626033][ T5993] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   57.637216][ T5993] batman_adv: batadv0: Adding interface: batadv_slave_1
[   57.644351][ T5993] 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.
[   57.670791][ T5993] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   57.687439][ T5993] hsr_slave_0: entered promiscuous mode
[   57.693446][ T5993] hsr_slave_1: entered promiscuous mode
[   57.886946][ T5993] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   57.895586][ T5993] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   57.903836][ T5993] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   57.912030][ T5993] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   57.931197][ T5993] bridge0: port 2(bridge_slave_1) entered blocking state
[   57.938362][ T5993] bridge0: port 2(bridge_slave_1) entered forwarding state
[   57.945648][ T5993] bridge0: port 1(bridge_slave_0) entered blocking state
[   57.952803][ T5993] bridge0: port 1(bridge_slave_0) entered forwarding state
[   57.973507][ T5993] 8021q: adding VLAN 0 to HW filter on device bond0
[   57.982871][   T31] bridge0: port 1(bridge_slave_0) entered disabled state
[   57.990406][   T31] bridge0: port 2(bridge_slave_1) entered disabled state
[   58.000894][ T5993] 8021q: adding VLAN 0 to HW filter on device team0
[   58.009845][   T31] bridge0: port 1(bridge_slave_0) entered blocking state
[   58.016912][   T31] bridge0: port 1(bridge_slave_0) entered forwarding state
[   58.026584][   T31] bridge0: port 2(bridge_slave_1) entered blocking state
[   58.033639][   T31] bridge0: port 2(bridge_slave_1) entered forwarding state
[   58.087594][ T5993] 8021q: adding VLAN 0 to HW filter on device batadv0
[   58.105504][ T5993] veth0_vlan: entered promiscuous mode
[   58.113086][ T5993] veth1_vlan: entered promiscuous mode
[   58.126723][ T5993] veth0_macvtap: entered promiscuous mode
[   58.133631][ T5993] veth1_macvtap: entered promiscuous mode
[   58.142945][ T5993] batman_adv: batadv0: Interface activated: batadv_slave_0
[   58.152148][ T5993] batman_adv: batadv0: Interface activated: batadv_slave_1
[   58.161440][ T3542] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   58.173806][ T3542] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   58.183259][ T3542] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   58.193398][ T3542] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   58.217473][   T31] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   58.228888][   T31] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)
[   58.240775][   T31] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   58.249148][   T31] 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-build2391967220=/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/ccdO0wGA.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=1715bcc2580000

Powered by blists - more mailing lists