Extracting prog: 4m21.272484292s
Minimizing prog: 1h38m21.142810605s
Simplifying prog options: 12m44.311464127s
Extracting C: 49.212874496s
Simplifying C: 0s


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:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

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:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program crashed: KASAN: slab-use-after-free Read in vhci_cleanup_unlink_list
single: successfully extracted reproducer
found reproducer with 6 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
write(0xffffffffffffffff, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
write(0xffffffffffffffff, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mount-openat-write-openat-write
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', 0x0, 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100), 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, 0x0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180), 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
program crashed: KASAN: slab-use-after-free Read in event_handler
a never seen crash title: KASAN: slab-use-after-free Read in event_handler, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program did not crash
testing 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program crashed: KASAN: slab-use-after-free Read in vhci_cleanup_unlink_list
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program crashed: KASAN: slab-use-after-free Read in event_handler
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0)
write(r0, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0)
write(r1, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa)

program crashed: KASAN: slab-use-after-free Read in event_handler
validation run: crashed=true
reproducing took 2h1m20.664401963s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/rtmutex_api.c:559 [inline]
BUG: KASAN: slab-use-after-free in mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:578
Read of size 1 at addr ffff888025f745b0 by task kworker/u8:16/4640

CPU: 1 UID: 0 PID: 4640 Comm: kworker/u8:16 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usbip_event event_handler
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:574
 kasan_check_byte include/linux/kasan.h:402 [inline]
 lock_acquire+0x7d/0x350 kernel/locking/lockdep.c:5880
 __mutex_lock_common kernel/locking/rtmutex_api.c:559 [inline]
 mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:578
 event_handler+0x1e3/0x4a0 drivers/usb/usbip/usbip_event.c:73
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5339 [inline]
 __kmalloc_noprof+0x415/0x790 mm/slub.c:5364
 _kmalloc_noprof include/linux/slab.h:973 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 __usb_create_hcd+0x67/0x900 drivers/usb/core/hcd.c:2566
 vhci_hcd_probe+0x104/0x3f0 drivers/usb/usbip/vhci_hcd.c:1378
 platform_probe+0xf9/0x190 drivers/base/platform.c:1494
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 platform_device_add+0x4bd/0x860 drivers/base/platform.c:818
 platform_device_register_full+0x55e/0x640 drivers/base/platform.c:957
 vhci_hcd_init+0x227/0x370 drivers/usb/usbip/vhci_hcd.c:1557
 do_one_initcall+0x250/0x870 init/main.c:1357
 do_initcall_level+0x10a/0x1a0 init/main.c:1419
 do_initcalls+0x59/0xa0 init/main.c:1435
 kernel_init_freeable+0x29d/0x3e0 init/main.c:1670
 kernel_init+0x22/0x1d0 init/main.c:1560
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 5969:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2706 [inline]
 slab_free mm/slub.c:6388 [inline]
 kfree+0x1c5/0x6c0 mm/slub.c:6703
 vhci_hcd_remove+0xed/0x110 drivers/usb/usbip/vhci_hcd.c:1434
 device_remove drivers/base/dd.c:616 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x48b/0x880 drivers/base/dd.c:1372
 unbind_store+0x1a4/0x1d0 drivers/base/bus.c:244
 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 insert_work+0x3d/0x330 kernel/workqueue.c:2260
 __queue_work+0xd4a/0x1120 kernel/workqueue.c:2436
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2489
 usb_rh_urb_dequeue drivers/usb/core/hcd.c:845 [inline]
 unlink1+0x33d/0x3e0 drivers/usb/core/hcd.c:1580
 usb_hcd_unlink_urb+0xda/0x1d0 drivers/usb/core/hcd.c:1617
 usb_kill_urb+0x10b/0x2f0 drivers/usb/core/urb.c:716
 hub_quiesce+0x20f/0x320 drivers/usb/core/hub.c:1412
 hub_suspend+0x904/0xad0 drivers/usb/core/hub.c:4008
 usb_suspend_interface drivers/usb/core/driver.c:1327 [inline]
 usb_suspend_both+0x285/0x1040 drivers/usb/core/driver.c:1450
 usb_runtime_suspend+0x58/0x110 drivers/usb/core/driver.c:2004
 __rpm_callback+0x2d6/0x930 drivers/base/power/runtime.c:406
 rpm_callback drivers/base/power/runtime.c:460 [inline]
 rpm_suspend+0x89d/0x1790 drivers/base/power/runtime.c:695
 __pm_runtime_suspend+0x12c/0x1a0 drivers/base/power/runtime.c:1167
 pm_runtime_autosuspend include/linux/pm_runtime.h:415 [inline]
 usb_runtime_idle+0x76/0x90 drivers/usb/core/driver.c:2041
 rpm_idle+0x379/0x900 drivers/base/power/runtime.c:547
 pm_runtime_work+0x11e/0x1b0 drivers/base/power/runtime.c:995
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Second to last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 insert_work+0x3d/0x330 kernel/workqueue.c:2260
 __queue_work+0xd4a/0x1120 kernel/workqueue.c:2436
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2489
 rh_call_control drivers/usb/core/hcd.c:706 [inline]
 rh_urb_enqueue drivers/usb/core/hcd.c:817 [inline]
 usb_hcd_submit_urb+0xa2d/0x1b40 drivers/usb/core/hcd.c:1538
 usb_start_wait_urb+0x13f/0x5b0 drivers/usb/core/message.c:62
 usb_internal_control_msg drivers/usb/core/message.c:117 [inline]
 usb_control_msg+0x234/0x3e0 drivers/usb/core/message.c:167
 get_port_status drivers/usb/core/hub.c:607 [inline]
 hub_ext_port_status+0x114/0x810 drivers/usb/core/hub.c:624
 usb_hub_port_status drivers/usb/core/hub.c:674 [inline]
 hub_activate+0x740/0x1b10 drivers/usb/core/hub.c:1185
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff888025f74000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 1456 bytes inside of
 freed 8192-byte region [ffff888025f74000, ffff888025f76000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25f70
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88813fe3c280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88813fe3c280 dead000000000122 0000000000000000
head: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000
head: 0080000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 6392396277
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x264c/0x26c0 mm/page_alloc.c:3955
 __alloc_frozen_pages_noprof+0x222/0x5b0 mm/page_alloc.c:5394
 alloc_slab_page mm/slub.c:3295 [inline]
 allocate_slab+0x7c/0x5e0 mm/slub.c:3410
 new_slab mm/slub.c:3456 [inline]
 refill_objects+0x2d8/0x350 mm/slub.c:7321
 refill_sheaf mm/slub.c:2833 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4699
 alloc_from_pcs mm/slub.c:4775 [inline]
 slab_alloc_node mm/slub.c:4909 [inline]
 __kmalloc_cache_noprof+0x467/0x670 mm/slub.c:5482
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:502 [inline]
 register_framebuffer+0x46d/0x880 drivers/video/fbdev/core/fbmem.c:602
 __drm_fb_helper_initial_config_and_unlock+0x1558/0x1b50 drivers/gpu/drm/drm_fb_helper.c:1746
 drm_fbdev_client_hotplug+0x16f/0x230 drivers/gpu/drm/clients/drm_fbdev_client.c:66
 drm_client_register+0x16e/0x200 drivers/gpu/drm/drm_client.c:143
 drm_fbdev_client_setup+0x1a0/0x450 drivers/gpu/drm/clients/drm_fbdev_client.c:168
 drm_client_setup+0x10a/0x230 drivers/gpu/drm/clients/drm_client_setup.c:46
 vkms_create+0x435/0x4f0 drivers/gpu/drm/vkms/vkms_drv.c:212
 vkms_init+0x57/0x80 drivers/gpu/drm/vkms/vkms_drv.c:240
 do_one_initcall+0x250/0x870 init/main.c:1357
page last free pid 10 tgid 10 ts 6343516915 stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 free_pages_prepare+0x9c0/0xac0 mm/page_alloc.c:1463
 __free_contig_range_common+0x174/0x340 mm/page_alloc.c:7019
 __free_contig_range mm/page_alloc.c:7064 [inline]
 free_pages_bulk+0x48/0x120 mm/page_alloc.c:5280
 vm_area_free_pages mm/vmalloc.c:3500 [inline]
 vfree+0x26f/0x510 mm/vmalloc.c:3549
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3453
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff888025f74480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888025f74500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888025f74580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888025f74600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888025f74680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/rtmutex_api.c:559 [inline]
BUG: KASAN: slab-use-after-free in mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:578
Read of size 1 at addr ffff888025f745b0 by task kworker/u8:16/4640

CPU: 1 UID: 0 PID: 4640 Comm: kworker/u8:16 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usbip_event event_handler
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:574
 kasan_check_byte include/linux/kasan.h:402 [inline]
 lock_acquire+0x7d/0x350 kernel/locking/lockdep.c:5880
 __mutex_lock_common kernel/locking/rtmutex_api.c:559 [inline]
 mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:578
 event_handler+0x1e3/0x4a0 drivers/usb/usbip/usbip_event.c:73
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5339 [inline]
 __kmalloc_noprof+0x415/0x790 mm/slub.c:5364
 _kmalloc_noprof include/linux/slab.h:973 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 __usb_create_hcd+0x67/0x900 drivers/usb/core/hcd.c:2566
 vhci_hcd_probe+0x104/0x3f0 drivers/usb/usbip/vhci_hcd.c:1378
 platform_probe+0xf9/0x190 drivers/base/platform.c:1494
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 platform_device_add+0x4bd/0x860 drivers/base/platform.c:818
 platform_device_register_full+0x55e/0x640 drivers/base/platform.c:957
 vhci_hcd_init+0x227/0x370 drivers/usb/usbip/vhci_hcd.c:1557
 do_one_initcall+0x250/0x870 init/main.c:1357
 do_initcall_level+0x10a/0x1a0 init/main.c:1419
 do_initcalls+0x59/0xa0 init/main.c:1435
 kernel_init_freeable+0x29d/0x3e0 init/main.c:1670
 kernel_init+0x22/0x1d0 init/main.c:1560
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 5969:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2706 [inline]
 slab_free mm/slub.c:6388 [inline]
 kfree+0x1c5/0x6c0 mm/slub.c:6703
 vhci_hcd_remove+0xed/0x110 drivers/usb/usbip/vhci_hcd.c:1434
 device_remove drivers/base/dd.c:616 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x48b/0x880 drivers/base/dd.c:1372
 unbind_store+0x1a4/0x1d0 drivers/base/bus.c:244
 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 insert_work+0x3d/0x330 kernel/workqueue.c:2260
 __queue_work+0xd4a/0x1120 kernel/workqueue.c:2436
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2489
 usb_rh_urb_dequeue drivers/usb/core/hcd.c:845 [inline]
 unlink1+0x33d/0x3e0 drivers/usb/core/hcd.c:1580
 usb_hcd_unlink_urb+0xda/0x1d0 drivers/usb/core/hcd.c:1617
 usb_kill_urb+0x10b/0x2f0 drivers/usb/core/urb.c:716
 hub_quiesce+0x20f/0x320 drivers/usb/core/hub.c:1412
 hub_suspend+0x904/0xad0 drivers/usb/core/hub.c:4008
 usb_suspend_interface drivers/usb/core/driver.c:1327 [inline]
 usb_suspend_both+0x285/0x1040 drivers/usb/core/driver.c:1450
 usb_runtime_suspend+0x58/0x110 drivers/usb/core/driver.c:2004
 __rpm_callback+0x2d6/0x930 drivers/base/power/runtime.c:406
 rpm_callback drivers/base/power/runtime.c:460 [inline]
 rpm_suspend+0x89d/0x1790 drivers/base/power/runtime.c:695
 __pm_runtime_suspend+0x12c/0x1a0 drivers/base/power/runtime.c:1167
 pm_runtime_autosuspend include/linux/pm_runtime.h:415 [inline]
 usb_runtime_idle+0x76/0x90 drivers/usb/core/driver.c:2041
 rpm_idle+0x379/0x900 drivers/base/power/runtime.c:547
 pm_runtime_work+0x11e/0x1b0 drivers/base/power/runtime.c:995
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Second to last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 insert_work+0x3d/0x330 kernel/workqueue.c:2260
 __queue_work+0xd4a/0x1120 kernel/workqueue.c:2436
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2489
 rh_call_control drivers/usb/core/hcd.c:706 [inline]
 rh_urb_enqueue drivers/usb/core/hcd.c:817 [inline]
 usb_hcd_submit_urb+0xa2d/0x1b40 drivers/usb/core/hcd.c:1538
 usb_start_wait_urb+0x13f/0x5b0 drivers/usb/core/message.c:62
 usb_internal_control_msg drivers/usb/core/message.c:117 [inline]
 usb_control_msg+0x234/0x3e0 drivers/usb/core/message.c:167
 get_port_status drivers/usb/core/hub.c:607 [inline]
 hub_ext_port_status+0x114/0x810 drivers/usb/core/hub.c:624
 usb_hub_port_status drivers/usb/core/hub.c:674 [inline]
 hub_activate+0x740/0x1b10 drivers/usb/core/hub.c:1185
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff888025f74000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 1456 bytes inside of
 freed 8192-byte region [ffff888025f74000, ffff888025f76000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25f70
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88813fe3c280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88813fe3c280 dead000000000122 0000000000000000
head: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000
head: 0080000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 6392396277
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x264c/0x26c0 mm/page_alloc.c:3955
 __alloc_frozen_pages_noprof+0x222/0x5b0 mm/page_alloc.c:5394
 alloc_slab_page mm/slub.c:3295 [inline]
 allocate_slab+0x7c/0x5e0 mm/slub.c:3410
 new_slab mm/slub.c:3456 [inline]
 refill_objects+0x2d8/0x350 mm/slub.c:7321
 refill_sheaf mm/slub.c:2833 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4699
 alloc_from_pcs mm/slub.c:4775 [inline]
 slab_alloc_node mm/slub.c:4909 [inline]
 __kmalloc_cache_noprof+0x467/0x670 mm/slub.c:5482
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:502 [inline]
 register_framebuffer+0x46d/0x880 drivers/video/fbdev/core/fbmem.c:602
 __drm_fb_helper_initial_config_and_unlock+0x1558/0x1b50 drivers/gpu/drm/drm_fb_helper.c:1746
 drm_fbdev_client_hotplug+0x16f/0x230 drivers/gpu/drm/clients/drm_fbdev_client.c:66
 drm_client_register+0x16e/0x200 drivers/gpu/drm/drm_client.c:143
 drm_fbdev_client_setup+0x1a0/0x450 drivers/gpu/drm/clients/drm_fbdev_client.c:168
 drm_client_setup+0x10a/0x230 drivers/gpu/drm/clients/drm_client_setup.c:46
 vkms_create+0x435/0x4f0 drivers/gpu/drm/vkms/vkms_drv.c:212
 vkms_init+0x57/0x80 drivers/gpu/drm/vkms/vkms_drv.c:240
 do_one_initcall+0x250/0x870 init/main.c:1357
page last free pid 10 tgid 10 ts 6343516915 stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 free_pages_prepare+0x9c0/0xac0 mm/page_alloc.c:1463
 __free_contig_range_common+0x174/0x340 mm/page_alloc.c:7019
 __free_contig_range mm/page_alloc.c:7064 [inline]
 free_pages_bulk+0x48/0x120 mm/page_alloc.c:5280
 vm_area_free_pages mm/vmalloc.c:3500 [inline]
 vfree+0x26f/0x510 mm/vmalloc.c:3549
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3453
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff888025f74480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888025f74500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888025f74580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888025f74600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888025f74680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================