Extracting prog: 5m31.089280257s
Minimizing prog: 30m34.47419936s
Simplifying prog options: 0s
Extracting C: 3m16.862251619s
Simplifying C: 58m26.78441226s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x0, 0x0)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x1ff)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x0, 0x0)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x1ff)

program crashed: kernel panic: hung_task: blocked tasks
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-mkdirat$cgroup_root
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x1ff)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-mkdirat$cgroup_root
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x0, 0x0)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x1ff)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
openat(0xffffffffffffff9c, 0x0, 0x0, 0x0)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x1ff)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x0, 0x0)
mkdirat$cgroup_root(0xffffffffffffff9c, 0x0, 0x1ff)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x0, 0x0)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x1ff)

program crashed: kernel panic: hung_task: blocked tasks
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x0, 0x0)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x1ff)

program crashed: kernel panic: hung_task: blocked tasks
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
detailed listing:
executing program 0:
syz_mount_image$bfs(&(0x7f0000000000), &(0x7f0000000080)='./file0\x00', 0x8008, &(0x7f0000000100)=ANY=[@ANYRES32=0x0, @ANYRESOCT, @ANYRESOCT, @ANYRES8, @ANYRES16, @ANYRESOCT, @ANYRESDEC, @ANYRES32, @ANYRESDEC, @ANYRES64=0x0], 0xf, 0xb8, &(0x7f0000000200)="$eJzs1zFKxUAQBuBJQkQ9geAJ0lh5AY8idmojVorgFTyFnVfxCOktLNKKOLLJFu+Vr3mBx/fBDvwzLAxstZ8/H+dvQ0S+RuRw9vCVmafvOWuenu+u7x/nGhtug0PRRsRJPeXNS/6+WmZNnY/Ty804dXPvsq8XSzzq1lscAADYWRsX2/kva+N3+QRmRF9KdbzvBQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABW9h8AAP//8Dksog==")
openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x0, 0x0)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/syz0\x00', 0x1ff)

program crashed: kernel panic: hung_task: blocked tasks
validation run: crashed=true
reproducing took 1h51m57.773929s
repro crashed as (corrupted=true):
Kernel panic - not syncing: hung_task: blocked tasks
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 vpanic+0x552/0x970 kernel/panic.c:650
 panic+0xd1/0xe0 kernel/panic.c:787
 check_hung_uninterruptible_tasks kernel/hung_task.c:356 [inline]
 watchdog.cold+0x1fd/0x234 kernel/hung_task.c:561
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

report is corrupted, running repro again
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
report is corrupted, running repro again
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
report is corrupted, running repro again
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$bfs-openat-mkdirat$cgroup_root
program crashed: kernel panic: hung_task: blocked tasks
final repro crashed as (corrupted=true):
Kernel panic - not syncing: hung_task: blocked tasks
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 vpanic+0x552/0x970 kernel/panic.c:650
 panic+0xd1/0xe0 kernel/panic.c:787
 check_hung_uninterruptible_tasks kernel/hung_task.c:356 [inline]
 watchdog.cold+0x1fd/0x234 kernel/hung_task.c:561
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..