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).


syzkaller login: qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0xa4000)
[   40.695586][ T1132] ata1.00: Read log 0x10 page 0x00 failed, Emask 0x1
[   40.695609][ T1132] ata1: failed to read log page 10h (errno=-5)
[   40.695625][ T1132] ata1.00: exception Emask 0x1 SAct 0x40000001 SErr 0x0 action 0x0
[   40.695642][ T1132] ata1.00: irq_stat 0x41000000
[   40.695657][ T1132] ata1.00: failed command: WRITE FPDMA QUEUED
[   40.695668][ T1132] ata1.00: cmd 61/c0:00:d6:d4:04/02:00:00:00:00/40 tag 0 ncq dma 360448 out
[   40.695668][ T1132]          res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error)
[   40.695725][ T1132] ata1.00: status: { DRDY }
[   40.695744][ T1132] ata1.00: failed command: WRITE FPDMA QUEUED
[   40.695754][ T1132] ata1.00: cmd 61/20:f0:b6:cf:04/05:00:00:00:00/40 tag 30 ncq dma 671744 out
[   40.695754][ T1132]          res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error)
[   40.695804][ T1132] ata1.00: status: { DRDY }
[   40.698151][ T1132] ata1.00: configured for UDMA/100
[   40.699728][ T1132] ata1: EH complete
qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x74000)
[   41.145768][ T1132] ata1.00: Read log 0x10 page 0x00 failed, Emask 0x1
[   41.145794][ T1132] ata1: failed to read log page 10h (errno=-5)
[   41.145811][ T1132] ata1.00: NCQ disabled due to excessive errors
[   41.145827][ T1132] ata1.00: exception Emask 0x1 SAct 0xc000 SErr 0x0 action 0x0
[   41.145847][ T1132] ata1.00: irq_stat 0x41000000
[   41.145865][ T1132] ata1.00: failed command: WRITE FPDMA QUEUED
[   41.145877][ T1132] ata1.00: cmd 61/a0:70:76:23:05/03:00:00:00:00/40 tag 14 ncq dma 475136 out
[   41.145877][ T1132]          res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error)
[   41.145936][ T1132] ata1.00: status: { DRDY }
[   41.145953][ T1132] ata1.00: failed command: WRITE FPDMA QUEUED
[   41.145965][ T1132] ata1.00: cmd 61/a0:78:16:27:05/01:00:00:00:00/40 tag 15 ncq dma 212992 out
[   41.145965][ T1132]          res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error)
[   41.146021][ T1132] ata1.00: status: { DRDY }
[   41.147166][ T1132] ata1.00: configured for UDMA/100
[   41.147598][ T1132] ata1: EH complete
Warning: Permanently added '[localhost]:10258' (ED25519) to the list of known hosts.
2026/11/10 19:18:00 parsed 1 programs
2026/11/10 19:18:00 serving rpc on tcp://40647
[   49.837740][ T5740] cgroup: Unknown subsys name 'net'
[   49.959097][ T5740] cgroup: Unknown subsys name 'cpuset'
[   49.965851][ T5740] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   51.285808][ T5740] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   54.028891][ T5749] br_netfilter no longer supported in user namespaces
[   54.237822][ T5750] 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.
[   54.247672][ T5750] ebtables: xtables 32bit compat interface no longer supported in namespaces and will be removed soon.
[   54.256697][ T5749] arp_tables: xtables 32bit compat interface no longer supported in namespaces and will be removed soon.
[   54.257053][ T5749] ip_tables: xtables 32bit compat interface no longer supported in namespaces and will be removed soon.
[   54.257585][ T5749] ip6_tables: xtables 32bit compat interface no longer supported in namespaces and will be removed soon.
[   54.822081][ T5780] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   54.824858][ T5780] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   54.825442][ T5780] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   54.826993][ T5780] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   54.828355][ T5780] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   55.710030][   T58] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   55.710052][   T58] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   55.796138][   T64] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   55.796159][   T64] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   56.105302][ T5792] bridge0: port 1(bridge_slave_0) entered blocking state
[   56.105995][ T5792] bridge0: port 1(bridge_slave_0) entered disabled state
[   56.106127][ T5792] bridge_slave_0: entered allmulticast mode
[   56.107440][ T5792] bridge_slave_0: entered promiscuous mode
[   56.112162][ T5792] bridge0: port 2(bridge_slave_1) entered blocking state
[   56.112277][ T5792] bridge0: port 2(bridge_slave_1) entered disabled state
[   56.112364][ T5792] bridge_slave_1: entered allmulticast mode
[   56.113667][ T5792] bridge_slave_1: entered promiscuous mode
[   56.243179][ T5792] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   56.249968][ T5792] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   56.279929][ T5792] team0: Port device team_slave_0 added
[   56.284745][ T5792] team0: Port device team_slave_1 added
[   56.336955][ T5792] batman_adv: batadv0: Adding interface: batadv_slave_0
[   56.336971][ T5792] 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.
[   56.336993][ T5792] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   56.339364][ T5792] batman_adv: batadv0: Adding interface: batadv_slave_1
[   56.339379][ T5792] 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.
[   56.339399][ T5792] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   56.444453][ T5792] hsr_slave_0: entered promiscuous mode
[   56.445602][ T5792] hsr_slave_1: entered promiscuous mode
[   56.680553][ T5792] netdevsim netdevsim6 netdevsim0: renamed from eth0
[   56.688922][ T5792] 8021q: adding VLAN 0 to HW filter on device netdevsim0
[   56.690068][ T5792] netdevsim netdevsim6 netdevsim1: renamed from eth1
[   56.699110][ T5792] 8021q: adding VLAN 0 to HW filter on device netdevsim1
[   56.699933][ T5792] netdevsim netdevsim6 netdevsim2: renamed from eth2
[   56.704044][ T5792] 8021q: adding VLAN 0 to HW filter on device netdevsim2
[   56.706330][ T5792] netdevsim netdevsim6 netdevsim3: renamed from eth3
[   56.720592][ T5792] 8021q: adding VLAN 0 to HW filter on device netdevsim3
[   56.792642][ T5792] 8021q: adding VLAN 0 to HW filter on device bond0
[   56.806874][ T5792] 8021q: adding VLAN 0 to HW filter on device team0
[   56.812901][   T38] bridge0: port 1(bridge_slave_0) entered blocking state
[   56.813038][   T38] bridge0: port 1(bridge_slave_0) entered forwarding state
[   56.821070][   T38] bridge0: port 2(bridge_slave_1) entered blocking state
[   56.821208][   T38] bridge0: port 2(bridge_slave_1) entered forwarding state
[   57.141849][ T5792] 8021q: adding VLAN 0 to HW filter on device batadv0
[   57.318971][ T5792] veth0_vlan: entered promiscuous mode
[   57.326614][ T5792] veth1_vlan: entered promiscuous mode
[   57.347385][ T5792] veth0_macvtap: entered promiscuous mode
[   57.353637][ T5792] veth1_macvtap: entered promiscuous mode
[   57.371911][ T5792] batman_adv: batadv0: Interface activated: batadv_slave_0
[   57.379296][ T5792] batman_adv: batadv0: Interface activated: batadv_slave_1
[   57.395826][ T5763] netdevsim netdevsim6 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   57.415584][ T5763] netdevsim netdevsim6 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   57.466761][ T5763] netdevsim netdevsim6 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   57.466810][ T5763] netdevsim netdevsim6 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   57.486746][ T5763] netdevsim netdevsim6 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).
[   57.578846][ T5763] netdevsim netdevsim6 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   57.644338][ T5763] netdevsim netdevsim6 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   57.731907][ T5763] netdevsim netdevsim6 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   58.942574][ T5763] bridge_slave_1: left allmulticast mode
[   58.942609][ T5763] bridge_slave_1: left promiscuous mode
[   58.943154][ T5763] bridge0: port 2(bridge_slave_1) entered disabled state
[   58.953895][ T5763] bridge_slave_0: left allmulticast mode
[   58.953921][ T5763] bridge_slave_0: left promiscuous mode
[   58.954168][ T5763] bridge0: port 1(bridge_slave_0) entered disabled state
[   59.093813][ T5763] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[   59.100475][ T5763] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[   59.101961][ T5763] bond0 (unregistering): Released all slaves
[   59.186544][ T5763] hsr_slave_0: left promiscuous mode
[   59.187330][ T5763] hsr_slave_1: left promiscuous mode
[   59.188152][ T5763] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[   59.188175][ T5763] batman_adv: batadv0: Removing interface: batadv_slave_0
[   59.189445][ T5763] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[   59.189461][ T5763] batman_adv: batadv0: Removing interface: batadv_slave_1
[   59.197738][ T5763] veth1_macvtap: left promiscuous mode
[   59.197837][ T5763] veth0_macvtap: left promiscuous mode
[   59.197946][ T5763] veth1_vlan: left promiscuous mode
[   59.198079][ T5763] veth0_vlan: left promiscuous mode
[   59.400764][ T5763] team0 (unregistering): Port device team_slave_1 removed
[   59.411607][ T5763] team0 (unregistering): Port device team_slave_0 removed
[   59.482765][ T5444] 8021q: adding VLAN 0 to HW filter on device eth2
[   59.705030][ T5444] 8021q: adding VLAN 0 to HW filter on device eth3
[   59.930489][ T5444] 8021q: adding VLAN 0 to HW filter on device eth4
[   60.141057][ T5444] 8021q: adding VLAN 0 to HW filter on device eth5


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-build4239141871=/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/ccLPlc5j.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=1632d84d580000