Re: [syzbot] [block?] general protection fault in blk_mq_quiesce_queue

[syzbot <syzbot+fefa0af09f7891b1800e@syzkaller.appspotmail.com>]

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)
execution of simple program fails: NOTFAIL: arptable checkpoint: getsockopt(ARPT_SO_GET_ENTRIES) failed. table=filter (errno 22: Invalid argument).


Warning: Permanently added '[localhost]:6819' (ED25519) to the list of known hosts.
2026/11/10 19:04:41 parsed 1 programs
2026/11/10 19:04:41 serving rpc on tcp://42245
[   55.963375][ T5742] cgroup: Unknown subsys name 'net'
[   56.074706][ T5742] cgroup: Unknown subsys name 'cpuset'
[   56.080672][ T5742] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   57.409559][ T5742] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   59.695528][ T5753] br_netfilter no longer supported in user namespaces
[   59.875947][ T5753] soft_limit_in_bytes is deprecated and will be removed. Writing any value to this file has no effect. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[   59.936142][ T5753] ebtables: xtables 32bit compat interface no longer supported in namespaces and will be removed soon.
[   59.936380][ T5753] arp_tables: xtables 32bit compat interface no longer supported in namespaces and will be removed soon.
[   59.936642][ T5753] ip_tables: xtables 32bit compat interface no longer supported in namespaces and will be removed soon.
[   59.936863][ T5753] ip6_tables: xtables 32bit compat interface no longer supported in namespaces and will be removed soon.
[   60.511799][ T5755] bridge0: port 1(bridge_slave_0) entered blocking state
[   60.512258][ T5755] bridge0: port 1(bridge_slave_0) entered disabled state
[   60.512367][ T5755] bridge_slave_0: entered allmulticast mode
[   60.513749][ T5755] bridge_slave_0: entered promiscuous mode
[   60.517106][ T5755] bridge0: port 2(bridge_slave_1) entered blocking state
[   60.517184][ T5755] bridge0: port 2(bridge_slave_1) entered disabled state
[   60.517279][ T5755] bridge_slave_1: entered allmulticast mode
[   60.518687][ T5755] bridge_slave_1: entered promiscuous mode
[   60.627709][ T5755] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   60.634100][ T5755] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   60.653715][ T5755] team0: Port device team_slave_0 added
[   60.655721][ T5755] team0: Port device team_slave_1 added
[   60.667483][ T5755] batman_adv: batadv0: Adding interface: batadv_slave_0
[   60.667493][ T5755] 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.
[   60.667507][ T5755] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   60.669146][ T5755] batman_adv: batadv0: Adding interface: batadv_slave_1
[   60.669154][ T5755] 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.
[   60.669168][ T5755] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   60.705286][ T5755] hsr_slave_0: entered promiscuous mode
[   60.706202][ T5755] hsr_slave_1: entered promiscuous mode
[   60.942218][   T38] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   60.942232][   T38] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   61.091172][   T57] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   61.091187][   T57] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   61.183299][ T5755] netdevsim netdevsim3 netdevsim0: renamed from eth0
[   61.188345][ T5755] 8021q: adding VLAN 0 to HW filter on device netdevsim0
[   61.189037][ T5755] netdevsim netdevsim3 netdevsim1: renamed from eth1
[   61.195751][ T5755] 8021q: adding VLAN 0 to HW filter on device netdevsim1
[   61.213344][ T5755] netdevsim netdevsim3 netdevsim2: renamed from eth2
[   61.219620][ T5755] 8021q: adding VLAN 0 to HW filter on device netdevsim2
[   61.221457][ T5755] netdevsim netdevsim3 netdevsim3: renamed from eth3
[   61.227586][ T5755] 8021q: adding VLAN 0 to HW filter on device netdevsim3
[   61.301564][   T65] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   61.303404][   T65] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   61.304783][   T65] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   61.309632][   T65] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   61.316544][   T65] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   61.412526][ T5755] 8021q: adding VLAN 0 to HW filter on device bond0
[   61.422578][ T5755] 8021q: adding VLAN 0 to HW filter on device team0
[   61.430476][   T57] bridge0: port 1(bridge_slave_0) entered blocking state
[   61.430588][   T57] bridge0: port 1(bridge_slave_0) entered forwarding state
[   61.437671][   T57] bridge0: port 2(bridge_slave_1) entered blocking state
[   61.437766][   T57] bridge0: port 2(bridge_slave_1) entered forwarding state
[   62.030796][ T5755] 8021q: adding VLAN 0 to HW filter on device batadv0
[   62.065809][ T5755] veth0_vlan: entered promiscuous mode
[   62.104328][ T5755] veth1_vlan: entered promiscuous mode
[   62.119783][ T5755] veth0_macvtap: entered promiscuous mode
[   62.123188][ T5755] veth1_macvtap: entered promiscuous mode
[   62.131833][ T5755] batman_adv: batadv0: Interface activated: batadv_slave_0
[   62.135888][ T5755] batman_adv: batadv0: Interface activated: batadv_slave_1
[   62.164634][ T5771] netdevsim netdevsim3 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   62.164916][ T5771] netdevsim netdevsim3 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   62.164938][ T5771] netdevsim netdevsim3 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   62.164958][ T5771] netdevsim netdevsim3 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   62.261207][   T14] netdevsim netdevsim3 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)
execution of simple program fails: NOTFAIL: arptable checkpoint: getsockopt(ARPT_SO_GET_ENTRIES) failed. table=filter (errno 22: Invalid argument).
[   63.811497][   T14] netdevsim netdevsim3 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   65.287829][   T14] netdevsim netdevsim3 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   65.371984][   T14] netdevsim netdevsim3 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   65.503178][   T14] bridge_slave_1: left allmulticast mode
[   65.503231][   T14] bridge_slave_1: left promiscuous mode
[   65.503831][   T14] bridge0: port 2(bridge_slave_1) entered disabled state
[   65.507795][   T14] bridge_slave_0: left allmulticast mode
[   65.507817][   T14] bridge_slave_0: left promiscuous mode
[   65.507980][   T14] bridge0: port 1(bridge_slave_0) entered disabled state
[   65.634809][   T14] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[   65.637628][   T14] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[   65.639515][   T14] bond0 (unregistering): Released all slaves
[   65.727181][   T14] hsr_slave_0: left promiscuous mode
[   65.728327][   T14] hsr_slave_1: left promiscuous mode
[   65.729104][   T14] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[   65.729125][   T14] batman_adv: batadv0: Removing interface: batadv_slave_0
[   65.730246][   T14] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[   65.730262][   T14] batman_adv: batadv0: Removing interface: batadv_slave_1
[   65.741743][   T14] veth1_macvtap: left promiscuous mode
[   65.741806][   T14] veth0_macvtap: left promiscuous mode
[   65.741943][   T14] veth1_vlan: left promiscuous mode
[   65.742076][   T14] veth0_vlan: left promiscuous mode
[   65.935455][   T14] team0 (unregistering): Port device team_slave_1 removed
[   65.945027][   T14] team0 (unregistering): Port device team_slave_0 removed
[   66.043375][ T5444] 8021q: adding VLAN 0 to HW filter on device eth2
[   66.242059][ T5444] 8021q: adding VLAN 0 to HW filter on device eth3
[   66.430099][ T5444] 8021q: adding VLAN 0 to HW filter on device eth4
[   66.642015][ T5444] 8021q: adding VLAN 0 to HW filter on device eth5
[   71.222149][ T1439] ieee802154 phy0 wpan0: encryption failed: -22
[   71.222242][ T1439] ieee802154 phy1 wpan1: encryption failed: -22


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-build845281019=/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='go1.26.0'
GOWORK=''
PKG_CONFIG='pkg-config'

git status (err=<nil>)
HEAD detached at d2e5fb956a
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=d2e5fb956ad222b37a913979e04dc012f4868836 -X github.com/google/syzkaller/prog.gitRevisionDate=20260903-102143"  ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d2e5fb956ad222b37a913979e04dc012f4868836 -X github.com/google/syzkaller/prog.gitRevisionDate=20260903-102143"  ./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=d2e5fb956ad222b37a913979e04dc012f4868836 -X github.com/google/syzkaller/prog.gitRevisionDate=20260903-102143"  -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_386
x86_64-linux-gnu-g++ -o ./bin/linux_386/syz-executor executor/executor.cc \
	-m32 -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_386=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"d2e5fb956ad222b37a913979e04dc012f4868836\"
/usr/bin/ld: /tmp/cc4F8CFT.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x145): 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
[INFO] Unsupported architecture '386', skipping check.



Tested on:

commit:         067c5c24 Merge tag 'page_alloc-for-7.4-rc2' of git://g..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=c40cb9cd7a4b919a
dashboard link: https://syzkaller.appspot.com/bug?extid=fefa0af09f7891b1800e
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
userspace arch: i386
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1777944d580000