Extracting prog: 34.70308294s
Minimizing prog: 24m19.176163074s
Simplifying prog options: 3m56.377844125s
Extracting C: 19.149935514s
Simplifying C: 0s
extracting reproducer from 37 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-getsockopt$IP_VS_SO_GET_SERVICES-prlimit64-execve-gettid-openat$rfkill-write$rfkill-timer_create-timer_settime
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$IP_VS_SO_GET_SERVICES(0xffffffffffffffff, 0x0, 0x482, &(0x7f0000000480)=""/140, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
execve(0x0, 0x0, 0x0)
r2 = gettid()
r3 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r3, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @tid=r2}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x1, &(0x7f0000000280)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0)
program crashed: possible deadlock in rfkill_fop_write
single: successfully extracted reproducer
found reproducer with 17 syscalls
minimizing guilty program
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-getsockopt$IP_VS_SO_GET_SERVICES-prlimit64-execve-gettid-openat$rfkill-write$rfkill-timer_create
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$IP_VS_SO_GET_SERVICES(0xffffffffffffffff, 0x0, 0x482, &(0x7f0000000480)=""/140, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
execve(0x0, 0x0, 0x0)
r2 = gettid()
r3 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r3, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
timer_create(0x0, &(0x7f0000000040)={0x0, 0x21, 0x800000000004, @tid=r2}, &(0x7f0000bbdffc))
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-getsockopt$IP_VS_SO_GET_SERVICES-prlimit64-execve-gettid-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$IP_VS_SO_GET_SERVICES(0xffffffffffffffff, 0x0, 0x482, &(0x7f0000000480)=""/140, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
execve(0x0, 0x0, 0x0)
gettid()
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-getsockopt$IP_VS_SO_GET_SERVICES-prlimit64-execve-gettid-openat$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$IP_VS_SO_GET_SERVICES(0xffffffffffffffff, 0x0, 0x482, &(0x7f0000000480)=""/140, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
execve(0x0, 0x0, 0x0)
gettid()
openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
program did not crash
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-getsockopt$IP_VS_SO_GET_SERVICES-prlimit64-execve-gettid-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$IP_VS_SO_GET_SERVICES(0xffffffffffffffff, 0x0, 0x482, &(0x7f0000000480)=""/140, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
execve(0x0, 0x0, 0x0)
gettid()
write$rfkill(0xffffffffffffffff, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program did not crash
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-getsockopt$IP_VS_SO_GET_SERVICES-prlimit64-execve-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$IP_VS_SO_GET_SERVICES(0xffffffffffffffff, 0x0, 0x482, &(0x7f0000000480)=""/140, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
execve(0x0, 0x0, 0x0)
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-getsockopt$IP_VS_SO_GET_SERVICES-prlimit64-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$IP_VS_SO_GET_SERVICES(0xffffffffffffffff, 0x0, 0x482, &(0x7f0000000480)=""/140, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-getsockopt$IP_VS_SO_GET_SERVICES-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
getsockopt$IP_VS_SO_GET_SERVICES(0xffffffffffffffff, 0x0, 0x482, &(0x7f0000000480)=""/140, 0x0)
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-socket$inet6_tcp-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-sched_setscheduler-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-recvmmsg-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
recvmmsg(0xffffffffffffffff, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-socketpair$unix-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
socketpair$unix(0x1, 0x2, 0x0, 0x0)
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-sched_setscheduler-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = getpid()
sched_setscheduler(r1, 0x2, 0x0)
r2 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r2, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-getpid-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
getpid()
r1 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r1, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-prlimit64-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
r1 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r1, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-bind$inet-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, 0x0, 0x0)
r1 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r1, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet_tcp-openat$rfkill-write$rfkill
detailed listing:
executing program 0:
socket$inet_tcp(0x2, 0x1, 0x0)
r0 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r0, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r0, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = openat$rfkill(0xffffffffffffff9c, 0x0, 0x40e02, 0x0)
write$rfkill(r0, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program did not crash
testing program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r0, 0x0, 0x0)
program did not crash
extracting C reproducer
testing compiled C program (duration=45.401817096s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$rfkill-write$rfkill
program crashed: possible deadlock in hci_dev_do_close
a never seen crash title: possible deadlock in hci_dev_do_close, ignore
simplifying guilty program options
testing program (duration=45.401817096s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r0, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
extracting C reproducer
testing compiled C program (duration=45.401817096s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$rfkill-write$rfkill
program crashed: possible deadlock in hci_dev_do_close
a never seen crash title: possible deadlock in hci_dev_do_close, ignore
testing program (duration=45.401817096s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$rfkill-write$rfkill
detailed listing:
executing program 0:
r0 = openat$rfkill(0xffffffffffffff9c, &(0x7f0000000180), 0x40e02, 0x0)
write$rfkill(r0, &(0x7f0000000300)={0x0, 0x2, 0x3, 0x1, 0x1}, 0x8)
program crashed: possible deadlock in rfkill_fop_write
extracting C reproducer
testing compiled C program (duration=45.401817096s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$rfkill-write$rfkill
program crashed: possible deadlock in hci_dev_do_close
a never seen crash title: possible deadlock in hci_dev_do_close, ignore
reproducing took 29m26.95384752s
repro crashed as (corrupted=false):
======================================================
WARNING: possible circular locking dependency detected
5.15.183-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.16/4336 is trying to acquire lock:
ffff88805c6ccc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xc1/0x1b0 kernel/workqueue.c:3090
but task is already holding lock:
ffffffff8d4b1fc8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 net/rfkill/core.c:1266
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (rfkill_global_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
rfkill_register+0x33/0x8a0 net/rfkill/core.c:1045
hci_register_dev+0x452/0x970 net/bluetooth/hci_core.c:3960
__vhci_create_device drivers/bluetooth/hci_vhci.c:129 [inline]
vhci_create_device+0x32c/0x5c0 drivers/bluetooth/hci_vhci.c:153
vhci_get_user drivers/bluetooth/hci_vhci.c:210 [inline]
vhci_write+0x391/0x450 drivers/bluetooth/hci_vhci.c:290
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x712/0xd00 fs/read_write.c:594
ksys_write+0x14d/0x250 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #3 (&data->open_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
vhci_send_frame+0x88/0x100 drivers/bluetooth/hci_vhci.c:71
hci_send_frame+0x1a9/0x2e0 net/bluetooth/hci_core.c:4256
hci_sched_acl_pkt net/bluetooth/hci_core.c:4781 [inline]
hci_sched_acl net/bluetooth/hci_core.c:4866 [inline]
hci_tx_work+0x9f9/0x1710 net/bluetooth/hci_core.c:4932
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
-> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}:
__flush_work+0xdd/0x1b0 kernel/workqueue.c:3090
hci_dev_do_close+0x1e7/0x1030 net/bluetooth/hci_core.c:1756
hci_unregister_dev+0x2d7/0x580 net/bluetooth/hci_core.c:4040
vhci_release+0x73/0xc0 drivers/bluetooth/hci_vhci.c:345
__fput+0x234/0x930 fs/file_table.c:311
task_work_run+0x125/0x1a0 kernel/task_work.c:188
exit_task_work include/linux/task_work.h:33 [inline]
do_exit+0x616/0x20a0 kernel/exit.c:874
do_group_exit+0x12e/0x300 kernel/exit.c:996
get_signal+0x6ca/0x12c0 kernel/signal.c:2900
arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #1 (&hdev->req_lock){+.+.}-{3:3}:
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
hci_req_sync net/bluetooth/hci_request.c:278 [inline]
bg_scan_update+0x44/0x3b0 net/bluetooth/hci_request.c:2952
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
-> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__flush_work+0xdd/0x1b0 kernel/workqueue.c:3090
__cancel_work_timer+0x3ac/0x520 kernel/workqueue.c:3181
hci_request_cancel_all+0xcc/0x300 net/bluetooth/hci_request.c:3522
hci_dev_do_close+0x4e/0x1030 net/bluetooth/hci_core.c:1736
hci_rfkill_set_block+0x10a/0x190 net/bluetooth/hci_core.c:2235
rfkill_set_block+0x1c6/0x420 net/rfkill/core.c:345
rfkill_fop_write+0x458/0x560 net/rfkill/core.c:1274
vfs_write+0x300/0xd00 fs/read_write.c:592
ksys_write+0x14d/0x250 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
other info that might help us debug this:
Chain exists of:
(work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(rfkill_global_mutex);
lock(&data->open_mutex);
lock(rfkill_global_mutex);
lock((work_completion)(&hdev->bg_scan_update));
*** DEADLOCK ***
1 lock held by syz.0.16/4336:
#0: ffffffff8d4b1fc8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 net/rfkill/core.c:1266
stack backtrace:
CPU: 1 PID: 4336 Comm: syz.0.16 Not tainted 5.15.183-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__flush_work+0xdd/0x1b0 kernel/workqueue.c:3090
__cancel_work_timer+0x3ac/0x520 kernel/workqueue.c:3181
hci_request_cancel_all+0xcc/0x300 net/bluetooth/hci_request.c:3522
hci_dev_do_close+0x4e/0x1030 net/bluetooth/hci_core.c:1736
hci_rfkill_set_block+0x10a/0x190 net/bluetooth/hci_core.c:2235
rfkill_set_block+0x1c6/0x420 net/rfkill/core.c:345
rfkill_fop_write+0x458/0x560 net/rfkill/core.c:1274
vfs_write+0x300/0xd00 fs/read_write.c:592
ksys_write+0x14d/0x250 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f62b7734969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff00992bf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f62b795bfa0 RCX: 00007f62b7734969
RDX: 0000000000000008 RSI: 0000200000000300 RDI: 0000000000000003
RBP: 00007f62b77b6ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f62b795bfa0 R14: 00007f62b795bfa0 R15: 0000000000000003
final repro crashed as (corrupted=false):
======================================================
WARNING: possible circular locking dependency detected
5.15.183-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.16/4336 is trying to acquire lock:
ffff88805c6ccc28 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xc1/0x1b0 kernel/workqueue.c:3090
but task is already holding lock:
ffffffff8d4b1fc8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 net/rfkill/core.c:1266
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (rfkill_global_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
rfkill_register+0x33/0x8a0 net/rfkill/core.c:1045
hci_register_dev+0x452/0x970 net/bluetooth/hci_core.c:3960
__vhci_create_device drivers/bluetooth/hci_vhci.c:129 [inline]
vhci_create_device+0x32c/0x5c0 drivers/bluetooth/hci_vhci.c:153
vhci_get_user drivers/bluetooth/hci_vhci.c:210 [inline]
vhci_write+0x391/0x450 drivers/bluetooth/hci_vhci.c:290
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x712/0xd00 fs/read_write.c:594
ksys_write+0x14d/0x250 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #3 (&data->open_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
vhci_send_frame+0x88/0x100 drivers/bluetooth/hci_vhci.c:71
hci_send_frame+0x1a9/0x2e0 net/bluetooth/hci_core.c:4256
hci_sched_acl_pkt net/bluetooth/hci_core.c:4781 [inline]
hci_sched_acl net/bluetooth/hci_core.c:4866 [inline]
hci_tx_work+0x9f9/0x1710 net/bluetooth/hci_core.c:4932
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
-> #2 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}:
__flush_work+0xdd/0x1b0 kernel/workqueue.c:3090
hci_dev_do_close+0x1e7/0x1030 net/bluetooth/hci_core.c:1756
hci_unregister_dev+0x2d7/0x580 net/bluetooth/hci_core.c:4040
vhci_release+0x73/0xc0 drivers/bluetooth/hci_vhci.c:345
__fput+0x234/0x930 fs/file_table.c:311
task_work_run+0x125/0x1a0 kernel/task_work.c:188
exit_task_work include/linux/task_work.h:33 [inline]
do_exit+0x616/0x20a0 kernel/exit.c:874
do_group_exit+0x12e/0x300 kernel/exit.c:996
get_signal+0x6ca/0x12c0 kernel/signal.c:2900
arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #1 (&hdev->req_lock){+.+.}-{3:3}:
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
hci_req_sync net/bluetooth/hci_request.c:278 [inline]
bg_scan_update+0x44/0x3b0 net/bluetooth/hci_request.c:2952
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
-> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__flush_work+0xdd/0x1b0 kernel/workqueue.c:3090
__cancel_work_timer+0x3ac/0x520 kernel/workqueue.c:3181
hci_request_cancel_all+0xcc/0x300 net/bluetooth/hci_request.c:3522
hci_dev_do_close+0x4e/0x1030 net/bluetooth/hci_core.c:1736
hci_rfkill_set_block+0x10a/0x190 net/bluetooth/hci_core.c:2235
rfkill_set_block+0x1c6/0x420 net/rfkill/core.c:345
rfkill_fop_write+0x458/0x560 net/rfkill/core.c:1274
vfs_write+0x300/0xd00 fs/read_write.c:592
ksys_write+0x14d/0x250 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
other info that might help us debug this:
Chain exists of:
(work_completion)(&hdev->bg_scan_update) --> &data->open_mutex --> rfkill_global_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(rfkill_global_mutex);
lock(&data->open_mutex);
lock(rfkill_global_mutex);
lock((work_completion)(&hdev->bg_scan_update));
*** DEADLOCK ***
1 lock held by syz.0.16/4336:
#0: ffffffff8d4b1fc8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 net/rfkill/core.c:1266
stack backtrace:
CPU: 1 PID: 4336 Comm: syz.0.16 Not tainted 5.15.183-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__flush_work+0xdd/0x1b0 kernel/workqueue.c:3090
__cancel_work_timer+0x3ac/0x520 kernel/workqueue.c:3181
hci_request_cancel_all+0xcc/0x300 net/bluetooth/hci_request.c:3522
hci_dev_do_close+0x4e/0x1030 net/bluetooth/hci_core.c:1736
hci_rfkill_set_block+0x10a/0x190 net/bluetooth/hci_core.c:2235
rfkill_set_block+0x1c6/0x420 net/rfkill/core.c:345
rfkill_fop_write+0x458/0x560 net/rfkill/core.c:1274
vfs_write+0x300/0xd00 fs/read_write.c:592
ksys_write+0x14d/0x250 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f62b7734969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff00992bf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f62b795bfa0 RCX: 00007f62b7734969
RDX: 0000000000000008 RSI: 0000200000000300 RDI: 0000000000000003
RBP: 00007f62b77b6ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f62b795bfa0 R14: 00007f62b795bfa0 R15: 0000000000000003