Re: [syzbot] [ntfs3?] INFO: task hung in __start_renaming

syzbot
2025-11-24T04:47:04Z

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 '10.128.1.240' (ED25519) to the list of known hosts.
2025/11/24 04:46:07 parsed 1 programs
[ 90.555532][ T5834] cgroup: Unknown subsys name 'net'
[ 90.669357][ T5834] cgroup: Unknown subsys name 'cpuset'
[ 90.678428][ T5834] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[ 92.016508][ T10] cfg80211: failed to load regulatory.db
[ 92.473167][ T5834] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 95.487085][ T5846] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[ 96.148644][ T5858] chnl_net:caif_netlink_parms(): no params data found
[ 96.250234][ T5858] bridge0: port 1(bridge_slave_0) entered blocking state
[ 96.258110][ T5858] bridge0: port 1(bridge_slave_0) entered disabled state
[ 96.265979][ T5858] bridge_slave_0: entered allmulticast mode
[ 96.273344][ T5858] bridge_slave_0: entered promiscuous mode
[ 96.283227][ T5858] bridge0: port 2(bridge_slave_1) entered blocking state
[ 96.290745][ T5858] bridge0: port 2(bridge_slave_1) entered disabled state
[ 96.298585][ T5858] bridge_slave_1: entered allmulticast mode
[ 96.306164][ T5858] bridge_slave_1: entered promiscuous mode
[ 96.340272][ T5858] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 96.353486][ T5858] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 96.386615][ T5858] team0: Port device team_slave_0 added
[ 96.394597][ T5858] team0: Port device team_slave_1 added
[ 96.423182][ T5858] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 96.430950][ T5858] 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.
[ 96.457421][ T5858] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 96.470037][ T5858] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 96.477137][ T5858] 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.
[ 96.503196][ T5858] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 96.549258][ T5858] hsr_slave_0: entered promiscuous mode
[ 96.556089][ T5858] hsr_slave_1: entered promiscuous mode
[ 96.709149][ T5858] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 96.721617][ T5858] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 96.733093][ T5858] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 96.744474][ T5858] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 96.779618][ T5858] bridge0: port 2(bridge_slave_1) entered blocking state
[ 96.786970][ T5858] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 96.794851][ T5858] bridge0: port 1(bridge_slave_0) entered blocking state
[ 96.802116][ T5858] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 96.863750][ T5858] 8021q: adding VLAN 0 to HW filter on device bond0
[ 96.883749][ T12] bridge0: port 1(bridge_slave_0) entered disabled state
[ 96.893131][ T12] bridge0: port 2(bridge_slave_1) entered disabled state
[ 96.915600][ T5858] 8021q: adding VLAN 0 to HW filter on device team0
[ 96.931688][ T3534] bridge0: port 1(bridge_slave_0) entered blocking state
[ 96.938987][ T3534] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 96.952476][ T12] bridge0: port 2(bridge_slave_1) entered blocking state
[ 96.959687][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 97.144886][ T5858] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 97.200647][ T5858] veth0_vlan: entered promiscuous mode
[ 97.212659][ T5858] veth1_vlan: entered promiscuous mode
[ 97.247394][ T5858] veth0_macvtap: entered promiscuous mode
[ 97.257672][ T5858] veth1_macvtap: entered promiscuous mode
[ 97.279295][ T5858] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 97.293604][ T5858] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 97.311084][ T36] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 97.321470][ T36] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 97.333512][ T36] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 97.343962][ T36] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 97.489573][ T36] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 97.557912][ T36] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 97.656263][ T36] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 97.752469][ T36] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 98.236218][ T5896] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 98.244431][ T5896] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 98.253946][ T5896] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 98.264492][ T5896] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 98.272338][ T5896] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[ 99.530883][ T4188] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 99.539839][ T4188] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 99.571626][ T3534] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 99.579614][ T3534] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 100.426458][ T36] bridge_slave_1: left allmulticast mode
[ 100.447450][ T36] bridge_slave_1: left promiscuous mode
[ 100.454127][ T36] bridge0: port 2(bridge_slave_1) entered disabled state
[ 100.480752][ T36] bridge_slave_0: left allmulticast mode
[ 100.490779][ T36] bridge_slave_0: left promiscuous mode
[ 100.505305][ T36] bridge0: port 1(bridge_slave_0) entered disabled state
2025/11/24 04:46:20 executed programs: 0
[ 100.676852][ T5896] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 100.686417][ T5896] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 100.696621][ T5896] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 100.710027][ T5896] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 100.729116][ T5896] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[ 101.000183][ T36] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[ 101.015387][ T36] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[ 101.029740][ T36] bond0 (unregistering): Released all slaves
[ 101.191106][ T36] hsr_slave_0: left promiscuous mode
[ 101.198191][ T36] hsr_slave_1: left promiscuous mode
[ 101.204127][ T36] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[ 101.212520][ T36] batman_adv: batadv0: Removing interface: batadv_slave_0
[ 101.221975][ T36] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[ 101.229631][ T36] batman_adv: batadv0: Removing interface: batadv_slave_1
[ 101.245879][ T36] veth1_macvtap: left promiscuous mode
[ 101.251698][ T36] veth0_macvtap: left promiscuous mode
[ 101.258200][ T36] veth1_vlan: left promiscuous mode
[ 101.263553][ T36] veth0_vlan: left promiscuous mode
[ 101.580646][ T36] team0 (unregistering): Port device team_slave_1 removed
[ 101.610626][ T36] team0 (unregistering): Port device team_slave_0 removed
[ 102.143766][ T5949] chnl_net:caif_netlink_parms(): no params data found
[ 102.560717][ T5949] bridge0: port 1(bridge_slave_0) entered blocking state
[ 102.575166][ T5949] bridge0: port 1(bridge_slave_0) entered disabled state
[ 102.582540][ T5949] bridge_slave_0: entered allmulticast mode
[ 102.591585][ T5949] bridge_slave_0: entered promiscuous mode
[ 102.614286][ T5949] bridge0: port 2(bridge_slave_1) entered blocking state
[ 102.621909][ T5949] bridge0: port 2(bridge_slave_1) entered disabled state
[ 102.629681][ T5949] bridge_slave_1: entered allmulticast mode
[ 102.638831][ T5949] bridge_slave_1: entered promiscuous mode
[ 102.698198][ T5949] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 102.711869][ T5949] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 102.815644][ T5149] Bluetooth: hci0: command tx timeout
[ 103.123913][ T5949] team0: Port device team_slave_0 added
[ 103.139960][ T5949] team0: Port device team_slave_1 added
[ 103.229026][ T5949] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 103.239890][ T5949] 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.
[ 103.266203][ T5949] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 103.297209][ T5949] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 103.304455][ T5949] 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.
[ 103.331586][ T5949] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 103.553894][ T5949] hsr_slave_0: entered promiscuous mode
[ 103.584330][ T5949] hsr_slave_1: entered promiscuous mode
[ 104.403096][ T5949] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 104.420683][ T5949] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 104.435325][ T5949] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 104.449213][ T5949] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 104.617044][ T5949] 8021q: adding VLAN 0 to HW filter on device bond0
[ 104.649084][ T5949] 8021q: adding VLAN 0 to HW filter on device team0
[ 104.669296][ T3534] bridge0: port 1(bridge_slave_0) entered blocking state
[ 104.676566][ T3534] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 104.700338][ T3534] bridge0: port 2(bridge_slave_1) entered blocking state
[ 104.707610][ T3534] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 104.896202][ T5149] Bluetooth: hci0: command tx timeout
[ 105.029734][ T5949] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 105.112846][ T5949] veth0_vlan: entered promiscuous mode
[ 105.132429][ T5949] veth1_vlan: entered promiscuous mode
[ 105.181476][ T5949] veth0_macvtap: entered promiscuous mode
[ 105.200419][ T5949] veth1_macvtap: entered promiscuous mode
[ 105.228009][ T5949] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 105.248759][ T5949] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 105.270101][ T3534] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 105.283869][ T3534] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 105.294419][ T3534] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 105.317774][ T3534] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 105.417418][ T36] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 105.434266][ T36] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 105.481687][ T3534] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 105.490831][ T3534] wlan1: 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)

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-build3558344338=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
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'
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 26ee52375
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=26ee5237507419c1fa5dea5b2a84a0b7dcce9307 -X github.com/google/syzkaller/prog.gitRevisionDate=20251119-085940" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=26ee5237507419c1fa5dea5b2a84a0b7dcce9307 -X github.com/google/syzkaller/prog.gitRevisionDate=20251119-085940" ./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=26ee5237507419c1fa5dea5b2a84a0b7dcce9307 -X github.com/google/syzkaller/prog.gitRevisionDate=20251119-085940" -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=\"26ee5237507419c1fa5dea5b2a84a0b7dcce9307\"
/usr/bin/ld: /tmp/cchUMbrN.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: d724c6f8 Add linux-next specific files for 20251121
git tree: linux-next
kernel config: https://syzkaller.appspot.com/x/.config?x=68d11c703cf8e4a0
dashboard link: https://syzkaller.appspot.com/bug?extid=2fefb910d2c20c0698d8
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch: https://syzkaller.appspot.com/x/patch.diff?x=11883612580000