Extracting prog: 1m14.247458035s
Minimizing prog: 14m6.515170077s
Simplifying prog options: 0s
Extracting C: 29.734843314s
Simplifying C: 4m41.588790493s


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: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: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}}): mkdirat-mount-mkdirat-rmdir-add_key$keyring-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
add_key$keyring(0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff)
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program crashed: KASAN: use-after-free Read in device_create
program crashed: KASAN: use-after-free Read in device_create
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-add_key$keyring-mkdir-mount
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
add_key$keyring(0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff)
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-add_key$keyring-mkdir-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
add_key$keyring(0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff)
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-add_key$keyring-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
add_key$keyring(0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program crashed: KASAN: use-after-free Read in device_create
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

VM was preempted during syz execution: failed to run command in VM: instance is preempted, retrying
program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', 0x0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(0x0)
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(0x0, 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', 0x0, 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program did not crash
testing program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(0x0, 0x1ff)

program did not crash
extracting C reproducer
testing compiled C program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
program crashed: KASAN: use-after-free Read in device_create
simplifying C reproducer
testing compiled C program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
program crashed: KASAN: use-after-free Read in device_create
testing compiled C program (duration=33.594802105s, {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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
program did not crash
testing compiled C program (duration=33.594802105s, {Threaded:false 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: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}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
program did not crash
testing compiled C program (duration=33.594802105s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
program crashed: KASAN: use-after-free Read in device_create
testing compiled C program (duration=33.594802105s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
program crashed: KASAN: use-after-free Read in device_create
testing compiled C program (duration=33.594802105s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
program crashed: KASAN: use-after-free Read in device_create
testing compiled C program (duration=33.594802105s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
program crashed: KASAN: use-after-free Read in device_create
testing program (duration=33.594802105s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program crashed: KASAN: use-after-free Read in device_create
validation run: crashed=true
testing program (duration=33.594802105s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

VM was preempted during syz execution: failed to run command in VM: instance is preempted, retrying
program crashed: KASAN: use-after-free Read in device_create
validation run: crashed=true
testing program (duration=33.594802105s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-rmdir-mkdir-mount-mkdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./myconfig\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='./myconfig\x00', &(0x7f0000000300)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1\x00', 0x1ff)
rmdir(&(0x7f0000000900)='./myconfig/usb_gadget/g1\x00')
mkdir(&(0x7f0000000100)='./config\x00', 0x1ff)
mount(0x0, &(0x7f00000003c0)='./config\x00', &(0x7f0000000400)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000800)='./config/usb_gadget/g1/functions/midi.usb0\x00', 0x1ff)

program crashed: KASAN: use-after-free Read in device_create
validation run: crashed=true
reproducing took 23m3.030127516s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in kobject_get+0x113/0x120 lib/kobject.c:663
Read of size 1 at addr ffff888113eae03c by task syz.0.48/427

CPU: 0 PID: 427 Comm: syz.0.48 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 mm/kasan/report.c:444
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
 kobject_get+0x113/0x120 lib/kobject.c:663
 get_device drivers/base/core.c:3518 [inline]
 device_add+0x2f0/0xe90 drivers/base/core.c:3342
 device_create_groups_vargs drivers/base/core.c:4118 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4160
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdir fs/namei.c:4118 [inline]
 __se_sys_mkdir fs/namei.c:4116 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4116
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:84
 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: 0033:0x7fc6a04c10d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff831f33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc6a0748fa0 RCX: 00007fc6a04c10d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 00007fc6a0558024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a0748fac R14: 00007fc6a0748fa0 R15: 00007fc6a0748fa0
 </TASK>

Allocated by task 395:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:433 [inline]
 ____kasan_kmalloc mm/kasan/common.c:512 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:227 [inline]
 kmem_cache_alloc_trace+0x119/0x270 mm/slub.c:3274
 kmalloc include/linux/slab.h:619 [inline]
 kzalloc include/linux/slab.h:750 [inline]
 device_create_groups_vargs drivers/base/core.c:4100 [inline]
 device_create+0x13a/0x300 drivers/base/core.c:4160
 android_device_create drivers/usb/gadget/configfs.c:1788 [inline]
 gadgets_make+0x816/0xa70 drivers/usb/gadget/configfs.c:1885
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdirat fs/namei.c:4113 [inline]
 __se_sys_mkdirat fs/namei.c:4111 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4111
 x64_sys_call+0x37e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259
 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

Freed by task 395:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kfree+0xc4/0x270 mm/slub.c:4588
 device_create_release+0x15/0x20 drivers/base/core.c:4085
 device_release+0x96/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:713 [inline]
 kobject_release lib/kobject.c:744 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x18a/0x270 lib/kobject.c:761
 put_device drivers/base/core.c:3530 [inline]
 device_unregister drivers/base/core.c:3656 [inline]
 device_destroy+0xb4/0xf0 drivers/base/core.c:4226
 android_device_destroy drivers/usb/gadget/configfs.c:1820 [inline]
 gadgets_drop+0xa0/0xd0 drivers/usb/gadget/configfs.c:1901
 client_drop_item fs/configfs/dir.c:933 [inline]
 configfs_rmdir+0x871/0x960 fs/configfs/dir.c:1536
 vfs_rmdir+0x1ae/0x450 fs/namei.c:4157
 do_rmdir+0x261/0x6b0 fs/namei.c:4218
 __do_sys_rmdir fs/namei.c:4237 [inline]
 __se_sys_rmdir fs/namei.c:4235 [inline]
 __x64_sys_rmdir+0x49/0x50 fs/namei.c:4235
 x64_sys_call+0x25f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:85
 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

The buggy address belongs to the object at ffff888113eae000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 60 bytes inside of
 1024-byte region [ffff888113eae000, ffff888113eae400)
The buggy address belongs to the page:
page:ffffea00044faa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113ea8
head:ffffea00044faa00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 378, ts 43940448064, free_ts 43881513642
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 __kmalloc+0x16a/0x2c0 mm/slub.c:4432
 __kmalloc_node include/linux/slab.h:487 [inline]
 kmalloc_node include/linux/slab.h:642 [inline]
 kvmalloc_node+0x211/0x320 mm/util.c:621
 kvmalloc include/linux/mm.h:862 [inline]
 xt_alloc_table_info+0x3b/0xa0 net/netfilter/x_tables.c:1215
 ip6t_register_table+0xce/0x7b0 net/ipv6/netfilter/ip6_tables.c:1743
 ip6table_filter_table_init+0x78/0xb0 net/ipv6/netfilter/ip6table_filter.c:56
 xt_find_table_lock+0x2a5/0x400 net/netfilter/x_tables.c:1282
 xt_request_find_table_lock+0x27/0x100 net/netfilter/x_tables.c:1307
 get_info net/ipv6/netfilter/ip6_tables.c:979 [inline]
 do_ip6t_get_ctl+0x5d7/0x1120 net/ipv6/netfilter/ip6_tables.c:1667
 nf_getsockopt+0x26d/0x290 net/netfilter/nf_sockopt.c:116
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1474 [inline]
 free_pcp_prepare mm/page_alloc.c:1546 [inline]
 free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536
 free_unref_page+0xae/0x540 mm/page_alloc.c:3618
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x6c/0x100 mm/page_alloc.c:5900
 __free_slab+0xe5/0x1e0 mm/slub.c:2025
 free_slab mm/slub.c:2040 [inline]
 discard_slab mm/slub.c:2046 [inline]
 __unfreeze_partials+0x15a/0x190 mm/slub.c:2532
 put_cpu_partial+0xc6/0x120 mm/slub.c:2612
 __slab_free+0x1d4/0x290 mm/slub.c:3395
 do_slab_free mm/slub.c:3514 [inline]
 ___cache_free+0x104/0x120 mm/slub.c:3535
 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3245 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260
 kmem_cache_alloc_node include/linux/slab.h:492 [inline]
 __alloc_skb+0xe4/0x730 net/core/skbuff.c:416
 alloc_skb include/linux/skbuff.h:1183 [inline]
 alloc_skb_with_frags+0xa8/0x620 net/core/skbuff.c:6207

Memory state around the buggy address:
 ffff888113eadf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888113eadf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888113eae000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888113eae080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888113eae100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 1 PID: 427 at lib/refcount.c:25 refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Modules linked in:

CPU: 1 PID: 427 Comm: syz.0.48 Tainted: G    B             syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Code: 04 01 48 c7 c7 40 49 63 85 e8 58 67 5a 02 0f 0b eb df e8 ef 7f 19 ff c6 05 ab f4 95 04 01 48 c7 c7 80 48 63 85 e8 3c 67 5a 02 <0f> 0b eb c3 e8 d3 7f 19 ff c6 05 90 f4 95 04 01 48 c7 c7 e0 48 63
RSP: 0018:ffffc90000ecf9f8 EFLAGS: 00010246
RAX: e11ae457cf147200 RBX: 0000000000000002 RCX: ffff888110113b40
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000ecfa08 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001d9ea0 R12: 1ffff11022cdbd0e
R13: dffffc0000000000 R14: 0000000000000002 R15: 0000000000000000
FS:  000055558b14d500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34163fff CR3: 00000001237f0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_add include/linux/refcount.h:-1 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 kref_get include/linux/kref.h:45 [inline]
 kobject_get+0xfb/0x120 lib/kobject.c:667
 get_device drivers/base/core.c:3518 [inline]
 device_add+0x2f0/0xe90 drivers/base/core.c:3342
 device_create_groups_vargs drivers/base/core.c:4118 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4160
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdir fs/namei.c:4118 [inline]
 __se_sys_mkdir fs/namei.c:4116 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4116
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:84
 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: 0033:0x7fc6a04c10d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff831f33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc6a0748fa0 RCX: 00007fc6a04c10d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 00007fc6a0558024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a0748fac R14: 00007fc6a0748fa0 R15: 00007fc6a0748fa0
 </TASK>
---[ end trace cf11a94bac3d223b ]---
------------[ cut here ]------------
refcount_t: saturated; leaking memory.
WARNING: CPU: 0 PID: 427 at lib/refcount.c:22 refcount_warn_saturate+0x158/0x1a0 lib/refcount.c:22
Modules linked in:
CPU: 0 PID: 427 Comm: syz.0.48 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x158/0x1a0 lib/refcount.c:22
Code: 04 01 48 c7 c7 20 48 63 85 e8 04 67 5a 02 0f 0b eb 8b e8 9b 7f 19 ff c6 05 56 f4 95 04 01 48 c7 c7 20 48 63 85 e8 e8 66 5a 02 <0f> 0b e9 6c ff ff ff e8 7c 7f 19 ff c6 05 3b f4 95 04 01 48 c7 c7
RSP: 0018:ffffc90000ecf8b8 EFLAGS: 00010246
RAX: e11ae457cf147200 RBX: 0000000000000001 RCX: ffff888110113b40
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000ecf8c8 R08: ffff8881f7032f3f R09: 1ffff1103ee065e7
R10: dffffc0000000000 R11: ffffed103ee065e8 R12: 00000000c0000000
R13: ffff8881166de818 R14: 0000000000000001 R15: ffff888113eae038
FS:  000055558b14d500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34163fff CR3: 00000001237f0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_add include/linux/refcount.h:-1 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 kref_get include/linux/kref.h:45 [inline]
 kobject_get lib/kobject.c:667 [inline]
 kobject_add_internal+0xc44/0xde0 lib/kobject.c:248
 kobject_add_varg lib/kobject.c:398 [inline]
 kobject_add+0x165/0x230 lib/kobject.c:450
 device_add+0x398/0xe90 drivers/base/core.c:3357
 device_create_groups_vargs drivers/base/core.c:4118 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4160
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdir fs/namei.c:4118 [inline]
 __se_sys_mkdir fs/namei.c:4116 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4116
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:84
 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: 0033:0x7fc6a04c10d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff831f33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc6a0748fa0 RCX: 00007fc6a04c10d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 00007fc6a0558024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a0748fac R14: 00007fc6a0748fa0 R15: 00007fc6a0748fa0
 </TASK>
---[ end trace cf11a94bac3d223c ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 427 at lib/refcount.c:28 refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 427 Comm: syz.0.48 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Code: 04 01 48 c7 c7 80 48 63 85 e8 3c 67 5a 02 0f 0b eb c3 e8 d3 7f 19 ff c6 05 90 f4 95 04 01 48 c7 c7 e0 48 63 85 e8 20 67 5a 02 <0f> 0b eb a7 e8 b7 7f 19 ff c6 05 71 f4 95 04 01 48 c7 c7 20 48 63
RSP: 0018:ffffc90000ecf880 EFLAGS: 00010246
RAX: e11ae457cf147200 RBX: 0000000000000003 RCX: ffff888110113b40
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000ecf890 R08: ffffc90000ecf2e7 R09: 1ffff920001d9e5c
R10: dffffc0000000000 R11: fffff520001d9e5d R12: 00000000c0000000
R13: ffff888113eae03c R14: 0000000000000003 R15: ffff888113eae038
FS:  000055558b14d500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34163fff CR3: 00000001237f0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_sub_and_test include/linux/refcount.h:283 [inline]
 __refcount_dec_and_test include/linux/refcount.h:315 [inline]
 refcount_dec_and_test include/linux/refcount.h:333 [inline]
 kref_put include/linux/kref.h:64 [inline]
 kobject_put+0x231/0x270 lib/kobject.c:761
 kobject_add_internal+0xb52/0xde0 lib/kobject.c:266
 kobject_add_varg lib/kobject.c:398 [inline]
 kobject_add+0x165/0x230 lib/kobject.c:450
 device_add+0x398/0xe90 drivers/base/core.c:3357
 device_create_groups_vargs drivers/base/core.c:4118 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4160
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdir fs/namei.c:4118 [inline]
 __se_sys_mkdir fs/namei.c:4116 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4116
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:84
 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: 0033:0x7fc6a04c10d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff831f33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc6a0748fa0 RCX: 00007fc6a04c10d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 00007fc6a0558024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a0748fac R14: 00007fc6a0748fa0 R15: 00007fc6a0748fa0
 </TASK>
---[ end trace cf11a94bac3d223d ]---
kobject_add_internal failed for f_midi (error: -2 parent:  �������
)

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in kobject_get+0x113/0x120 lib/kobject.c:663
Read of size 1 at addr ffff888113eae03c by task syz.0.48/427

CPU: 0 PID: 427 Comm: syz.0.48 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 mm/kasan/report.c:444
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
 kobject_get+0x113/0x120 lib/kobject.c:663
 get_device drivers/base/core.c:3518 [inline]
 device_add+0x2f0/0xe90 drivers/base/core.c:3342
 device_create_groups_vargs drivers/base/core.c:4118 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4160
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdir fs/namei.c:4118 [inline]
 __se_sys_mkdir fs/namei.c:4116 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4116
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:84
 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: 0033:0x7fc6a04c10d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff831f33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc6a0748fa0 RCX: 00007fc6a04c10d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 00007fc6a0558024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a0748fac R14: 00007fc6a0748fa0 R15: 00007fc6a0748fa0
 </TASK>

Allocated by task 395:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:433 [inline]
 ____kasan_kmalloc mm/kasan/common.c:512 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:227 [inline]
 kmem_cache_alloc_trace+0x119/0x270 mm/slub.c:3274
 kmalloc include/linux/slab.h:619 [inline]
 kzalloc include/linux/slab.h:750 [inline]
 device_create_groups_vargs drivers/base/core.c:4100 [inline]
 device_create+0x13a/0x300 drivers/base/core.c:4160
 android_device_create drivers/usb/gadget/configfs.c:1788 [inline]
 gadgets_make+0x816/0xa70 drivers/usb/gadget/configfs.c:1885
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdirat fs/namei.c:4113 [inline]
 __se_sys_mkdirat fs/namei.c:4111 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4111
 x64_sys_call+0x37e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259
 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

Freed by task 395:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kfree+0xc4/0x270 mm/slub.c:4588
 device_create_release+0x15/0x20 drivers/base/core.c:4085
 device_release+0x96/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:713 [inline]
 kobject_release lib/kobject.c:744 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x18a/0x270 lib/kobject.c:761
 put_device drivers/base/core.c:3530 [inline]
 device_unregister drivers/base/core.c:3656 [inline]
 device_destroy+0xb4/0xf0 drivers/base/core.c:4226
 android_device_destroy drivers/usb/gadget/configfs.c:1820 [inline]
 gadgets_drop+0xa0/0xd0 drivers/usb/gadget/configfs.c:1901
 client_drop_item fs/configfs/dir.c:933 [inline]
 configfs_rmdir+0x871/0x960 fs/configfs/dir.c:1536
 vfs_rmdir+0x1ae/0x450 fs/namei.c:4157
 do_rmdir+0x261/0x6b0 fs/namei.c:4218
 __do_sys_rmdir fs/namei.c:4237 [inline]
 __se_sys_rmdir fs/namei.c:4235 [inline]
 __x64_sys_rmdir+0x49/0x50 fs/namei.c:4235
 x64_sys_call+0x25f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:85
 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

The buggy address belongs to the object at ffff888113eae000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 60 bytes inside of
 1024-byte region [ffff888113eae000, ffff888113eae400)
The buggy address belongs to the page:
page:ffffea00044faa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113ea8
head:ffffea00044faa00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 378, ts 43940448064, free_ts 43881513642
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 __kmalloc+0x16a/0x2c0 mm/slub.c:4432
 __kmalloc_node include/linux/slab.h:487 [inline]
 kmalloc_node include/linux/slab.h:642 [inline]
 kvmalloc_node+0x211/0x320 mm/util.c:621
 kvmalloc include/linux/mm.h:862 [inline]
 xt_alloc_table_info+0x3b/0xa0 net/netfilter/x_tables.c:1215
 ip6t_register_table+0xce/0x7b0 net/ipv6/netfilter/ip6_tables.c:1743
 ip6table_filter_table_init+0x78/0xb0 net/ipv6/netfilter/ip6table_filter.c:56
 xt_find_table_lock+0x2a5/0x400 net/netfilter/x_tables.c:1282
 xt_request_find_table_lock+0x27/0x100 net/netfilter/x_tables.c:1307
 get_info net/ipv6/netfilter/ip6_tables.c:979 [inline]
 do_ip6t_get_ctl+0x5d7/0x1120 net/ipv6/netfilter/ip6_tables.c:1667
 nf_getsockopt+0x26d/0x290 net/netfilter/nf_sockopt.c:116
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1474 [inline]
 free_pcp_prepare mm/page_alloc.c:1546 [inline]
 free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536
 free_unref_page+0xae/0x540 mm/page_alloc.c:3618
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x6c/0x100 mm/page_alloc.c:5900
 __free_slab+0xe5/0x1e0 mm/slub.c:2025
 free_slab mm/slub.c:2040 [inline]
 discard_slab mm/slub.c:2046 [inline]
 __unfreeze_partials+0x15a/0x190 mm/slub.c:2532
 put_cpu_partial+0xc6/0x120 mm/slub.c:2612
 __slab_free+0x1d4/0x290 mm/slub.c:3395
 do_slab_free mm/slub.c:3514 [inline]
 ___cache_free+0x104/0x120 mm/slub.c:3535
 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3245 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260
 kmem_cache_alloc_node include/linux/slab.h:492 [inline]
 __alloc_skb+0xe4/0x730 net/core/skbuff.c:416
 alloc_skb include/linux/skbuff.h:1183 [inline]
 alloc_skb_with_frags+0xa8/0x620 net/core/skbuff.c:6207

Memory state around the buggy address:
 ffff888113eadf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888113eadf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888113eae000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888113eae080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888113eae100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 1 PID: 427 at lib/refcount.c:25 refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Modules linked in:

CPU: 1 PID: 427 Comm: syz.0.48 Tainted: G    B             syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Code: 04 01 48 c7 c7 40 49 63 85 e8 58 67 5a 02 0f 0b eb df e8 ef 7f 19 ff c6 05 ab f4 95 04 01 48 c7 c7 80 48 63 85 e8 3c 67 5a 02 <0f> 0b eb c3 e8 d3 7f 19 ff c6 05 90 f4 95 04 01 48 c7 c7 e0 48 63
RSP: 0018:ffffc90000ecf9f8 EFLAGS: 00010246
RAX: e11ae457cf147200 RBX: 0000000000000002 RCX: ffff888110113b40
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000ecfa08 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001d9ea0 R12: 1ffff11022cdbd0e
R13: dffffc0000000000 R14: 0000000000000002 R15: 0000000000000000
FS:  000055558b14d500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34163fff CR3: 00000001237f0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_add include/linux/refcount.h:-1 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 kref_get include/linux/kref.h:45 [inline]
 kobject_get+0xfb/0x120 lib/kobject.c:667
 get_device drivers/base/core.c:3518 [inline]
 device_add+0x2f0/0xe90 drivers/base/core.c:3342
 device_create_groups_vargs drivers/base/core.c:4118 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4160
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdir fs/namei.c:4118 [inline]
 __se_sys_mkdir fs/namei.c:4116 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4116
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:84
 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: 0033:0x7fc6a04c10d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff831f33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc6a0748fa0 RCX: 00007fc6a04c10d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 00007fc6a0558024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a0748fac R14: 00007fc6a0748fa0 R15: 00007fc6a0748fa0
 </TASK>
---[ end trace cf11a94bac3d223b ]---
------------[ cut here ]------------
refcount_t: saturated; leaking memory.
WARNING: CPU: 0 PID: 427 at lib/refcount.c:22 refcount_warn_saturate+0x158/0x1a0 lib/refcount.c:22
Modules linked in:
CPU: 0 PID: 427 Comm: syz.0.48 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x158/0x1a0 lib/refcount.c:22
Code: 04 01 48 c7 c7 20 48 63 85 e8 04 67 5a 02 0f 0b eb 8b e8 9b 7f 19 ff c6 05 56 f4 95 04 01 48 c7 c7 20 48 63 85 e8 e8 66 5a 02 <0f> 0b e9 6c ff ff ff e8 7c 7f 19 ff c6 05 3b f4 95 04 01 48 c7 c7
RSP: 0018:ffffc90000ecf8b8 EFLAGS: 00010246
RAX: e11ae457cf147200 RBX: 0000000000000001 RCX: ffff888110113b40
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000ecf8c8 R08: ffff8881f7032f3f R09: 1ffff1103ee065e7
R10: dffffc0000000000 R11: ffffed103ee065e8 R12: 00000000c0000000
R13: ffff8881166de818 R14: 0000000000000001 R15: ffff888113eae038
FS:  000055558b14d500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34163fff CR3: 00000001237f0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_add include/linux/refcount.h:-1 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 kref_get include/linux/kref.h:45 [inline]
 kobject_get lib/kobject.c:667 [inline]
 kobject_add_internal+0xc44/0xde0 lib/kobject.c:248
 kobject_add_varg lib/kobject.c:398 [inline]
 kobject_add+0x165/0x230 lib/kobject.c:450
 device_add+0x398/0xe90 drivers/base/core.c:3357
 device_create_groups_vargs drivers/base/core.c:4118 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4160
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdir fs/namei.c:4118 [inline]
 __se_sys_mkdir fs/namei.c:4116 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4116
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:84
 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: 0033:0x7fc6a04c10d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff831f33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc6a0748fa0 RCX: 00007fc6a04c10d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 00007fc6a0558024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a0748fac R14: 00007fc6a0748fa0 R15: 00007fc6a0748fa0
 </TASK>
---[ end trace cf11a94bac3d223c ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 427 at lib/refcount.c:28 refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 427 Comm: syz.0.48 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Code: 04 01 48 c7 c7 80 48 63 85 e8 3c 67 5a 02 0f 0b eb c3 e8 d3 7f 19 ff c6 05 90 f4 95 04 01 48 c7 c7 e0 48 63 85 e8 20 67 5a 02 <0f> 0b eb a7 e8 b7 7f 19 ff c6 05 71 f4 95 04 01 48 c7 c7 20 48 63
RSP: 0018:ffffc90000ecf880 EFLAGS: 00010246
RAX: e11ae457cf147200 RBX: 0000000000000003 RCX: ffff888110113b40
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000ecf890 R08: ffffc90000ecf2e7 R09: 1ffff920001d9e5c
R10: dffffc0000000000 R11: fffff520001d9e5d R12: 00000000c0000000
R13: ffff888113eae03c R14: 0000000000000003 R15: ffff888113eae038
FS:  000055558b14d500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34163fff CR3: 00000001237f0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_sub_and_test include/linux/refcount.h:283 [inline]
 __refcount_dec_and_test include/linux/refcount.h:315 [inline]
 refcount_dec_and_test include/linux/refcount.h:333 [inline]
 kref_put include/linux/kref.h:64 [inline]
 kobject_put+0x231/0x270 lib/kobject.c:761
 kobject_add_internal+0xb52/0xde0 lib/kobject.c:266
 kobject_add_varg lib/kobject.c:398 [inline]
 kobject_add+0x165/0x230 lib/kobject.c:450
 device_add+0x398/0xe90 drivers/base/core.c:3357
 device_create_groups_vargs drivers/base/core.c:4118 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4160
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642
 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329
 vfs_mkdir+0x38b/0x590 fs/namei.c:4073
 do_mkdirat+0x174/0x4d0 fs/namei.c:4098
 __do_sys_mkdir fs/namei.c:4118 [inline]
 __se_sys_mkdir fs/namei.c:4116 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4116
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:84
 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: 0033:0x7fc6a04c10d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff831f33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc6a0748fa0 RCX: 00007fc6a04c10d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 00007fc6a0558024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a0748fac R14: 00007fc6a0748fa0 R15: 00007fc6a0748fa0
 </TASK>
---[ end trace cf11a94bac3d223d ]---
kobject_add_internal failed for f_midi (error: -2 parent:  �������
)