Extracting prog: 1m20.405091984s
Minimizing prog: 14m39.69761433s
Simplifying prog options: 0s
Extracting C: 23.24207391s
Simplifying C: 10m14.634596673s


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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program crashed: KASAN: use-after-free Write in config_item_get
program crashed: KASAN: use-after-free Write in config_item_get
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', 0x0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(0x0, 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, 0x0, 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program did not crash
testing program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, 0x0, 0x200)

program did not crash
extracting C reproducer
testing compiled C program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program crashed: KASAN: use-after-free Write in config_item_get
simplifying C reproducer
testing compiled C program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program crashed: KASAN: use-after-free Write in config_item_get
testing compiled C program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program did not crash
testing compiled C program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program did not crash
testing compiled C program (duration=42.704513143s, {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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program did not crash
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program crashed: KASAN: use-after-free Write in config_item_get
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program crashed: KASAN: use-after-free Write in config_item_get
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program crashed: KASAN: use-after-free Write in config_item_get
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program did not crash
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program did not crash
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program crashed: KASAN: use-after-free Write in config_item_get
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program did not crash
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program crashed: KASAN: use-after-free Write in config_item_get
testing compiled C program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
program crashed: KASAN: use-after-free Write in config_item_get
testing program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program crashed: KASAN: use-after-free Write in config_item_put
validation run: crashed=true
testing program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program crashed: KASAN: use-after-free Write in config_item_get
validation run: crashed=true
testing program (duration=42.704513143s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-symlinkat-unlinkat-unlinkat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./config/usb_gadget/g1/configs/c.1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
symlinkat(&(0x7f0000000300)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00')
unlinkat(0xffffffffffffff9c, &(0x7f0000000440)='./config/usb_gadget/g1/configs/c.1/uac2.usb0\x00', 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000480)='./config/usb_gadget/g1/functions/uac2.usb0\x00', 0x200)

program crashed: KASAN: use-after-free Write in config_item_get
validation run: crashed=true
reproducing took 28m58.857986758s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_write include/linux/instrumented.h:86 [inline]
BUG: KASAN: use-after-free in atomic_set include/linux/atomic/atomic-instrumented.h:41 [inline]
BUG: KASAN: use-after-free in refcount_set include/linux/refcount.h:136 [inline]
BUG: KASAN: use-after-free in refcount_warn_saturate+0x1e/0x1a0 lib/refcount.c:15
Write of size 4 at addr ffff8881135d401c by task syz.0.5358/5770

CPU: 1 PID: 5770 Comm: syz.0.5358 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
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
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_write include/linux/instrumented.h:86 [inline]
 atomic_set include/linux/atomic/atomic-instrumented.h:41 [inline]
 refcount_set include/linux/refcount.h:136 [inline]
 refcount_warn_saturate+0x1e/0x1a0 lib/refcount.c:15
 __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]
 config_item_get+0x8c/0x90 fs/configfs/item.c:104
 configfs_get_config_item fs/configfs/configfs_internal.h:128 [inline]
 get_target fs/configfs/symlink.c:125 [inline]
 configfs_symlink+0x44f/0x1330 fs/configfs/symlink.c:191
 vfs_symlink+0x29e/0x470 fs/namei.c:4437
 do_symlinkat+0x24a/0x5d0 fs/namei.c:4466
 __do_sys_symlinkat fs/namei.c:4483 [inline]
 __se_sys_symlinkat fs/namei.c:4480 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4480
 x64_sys_call+0x74b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:267
 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: 0033:0x7f7102dc9f99
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:00007ffedb5a8348 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007f7103051fa0 RCX: 00007f7102dc9f99
RDX: 0000200000000340 RSI: ffffffffffffff9c RDI: 0000200000000300
RBP: 00007f7102e60ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7103051fac R14: 00007f7103051fa0 R15: 00007f7103051fa0
 </TASK>

Allocated by task 5767:
 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]
 afunc_alloc_inst+0x4c/0x560 drivers/usb/gadget/function/f_uac2.c:1917
 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_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 5767:
 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
 afunc_free_inst+0x15/0x20 drivers/usb/gadget/function/f_uac2.c:1910
 usb_put_function_instance+0x85/0xa0 drivers/usb/gadget/functions.c:77
 f_uac2_attr_release+0x15/0x20 drivers/usb/gadget/function/f_uac2.c:1739
 config_item_cleanup fs/configfs/item.c:128 [inline]
 config_item_release fs/configfs/item.c:137 [inline]
 kref_put include/linux/kref.h:65 [inline]
 config_item_put+0x158/0x210 fs/configfs/item.c:149
 configfs_rmdir+0x89f/0x960 fs/configfs/dir.c:1540
 vfs_rmdir+0x1ae/0x450 fs/namei.c:4157
 do_rmdir+0x261/0x6b0 fs/namei.c:4218
 __do_sys_unlinkat fs/namei.c:4398 [inline]
 __se_sys_unlinkat fs/namei.c:4392 [inline]
 __x64_sys_unlinkat+0xc7/0xf0 fs/namei.c:4392
 x64_sys_call+0x4c0/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:264
 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 ffff8881135d4000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 28 bytes inside of
 512-byte region [ffff8881135d4000, ffff8881135d4200)
The buggy address belongs to the page:
page:ffffea00044d7500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1135d4
head:ffffea00044d7500 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 357, ts 29443303786, free_ts 28344064655
 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_track_caller+0x169/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x210/0x730 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 ndisc_alloc_skb net/ipv6/ndisc.c:422 [inline]
 ndisc_send_ns+0x347/0xb10 net/ipv6/ndisc.c:631
 addrconf_dad_work+0x9fa/0x1510 net/ipv6/addrconf.c:4225
 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328
 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475
 kthread+0x3f5/0x4f0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
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]
 __kmalloc_track_caller+0x11f/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x210/0x730 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1186 [inline]
 netlink_sendmsg+0x611/0xb80 net/netlink/af_netlink.c:1902

Memory state around the buggy address:
 ffff8881135d3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881135d3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881135d4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8881135d4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881135d4100: 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: 5770 at lib/refcount.c:25 refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Modules linked in:
CPU: 1 PID: 5770 Comm: syz.0.5358 Tainted: G    B             syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Code: 04 01 48 c7 c7 80 47 63 85 e8 c8 47 5a 02 0f 0b eb df e8 5f 80 19 ff c6 05 1b ea 95 04 01 48 c7 c7 c0 46 63 85 e8 ac 47 5a 02 <0f> 0b eb c3 e8 43 80 19 ff c6 05 00 ea 95 04 01 48 c7 c7 20 47 63
RSP: 0018:ffffc90003f8fc58 EFLAGS: 00010246
RAX: 62d462b274f9c600 RBX: 0000000000000002 RCX: ffff88810dd10000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003f8fc68 R08: ffffc90003f8f6c7 R09: 1ffff920007f1ed8
R10: dffffc0000000000 R11: fffff520007f1ed9 R12: ffff88811e745210
R13: dffffc0000000000 R14: 0000000000000002 R15: 0000000000000000
FS:  00005555759e7500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f08c7d1f060 CR3: 000000010f549000 CR4: 00000000003506a0
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]
 config_item_get+0x8c/0x90 fs/configfs/item.c:104
 configfs_get_config_item fs/configfs/configfs_internal.h:128 [inline]
 get_target fs/configfs/symlink.c:125 [inline]
 configfs_symlink+0x44f/0x1330 fs/configfs/symlink.c:191
 vfs_symlink+0x29e/0x470 fs/namei.c:4437
 do_symlinkat+0x24a/0x5d0 fs/namei.c:4466
 __do_sys_symlinkat fs/namei.c:4483 [inline]
 __se_sys_symlinkat fs/namei.c:4480 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4480
 x64_sys_call+0x74b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:267
 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: 0033:0x7f7102dc9f99
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:00007ffedb5a8348 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007f7103051fa0 RCX: 00007f7102dc9f99
RDX: 0000200000000340 RSI: ffffffffffffff9c RDI: 0000200000000300
RBP: 00007f7102e60ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7103051fac R14: 00007f7103051fa0 R15: 00007f7103051fa0
 </TASK>
---[ end trace 7553df31d740357f ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 5770 at lib/refcount.c:28 refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 5770 Comm: syz.0.5358 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Code: 04 01 48 c7 c7 c0 46 63 85 e8 ac 47 5a 02 0f 0b eb c3 e8 43 80 19 ff c6 05 00 ea 95 04 01 48 c7 c7 20 47 63 85 e8 90 47 5a 02 <0f> 0b eb a7 e8 27 80 19 ff c6 05 e1 e9 95 04 01 48 c7 c7 60 46 63
RSP: 0018:ffffc90003f8fc38 EFLAGS: 00010246
RAX: 62d462b274f9c600 RBX: 0000000000000003 RCX: ffff88810dd10000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90003f8fc48 R08: ffff8881f7132f3f R09: 1ffff1103ee265e7
R10: dffffc0000000000 R11: ffffed103ee265e8 R12: 00000000ffffffea
R13: dffffc0000000000 R14: 0000000000000003 R15: 00000000c0000000
FS:  00005555759e7500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30a63fff CR3: 000000010f549000 CR4: 00000000003506a0
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]
 config_item_put+0x200/0x210 fs/configfs/item.c:149
 configfs_symlink+0x4a6/0x1330 fs/configfs/symlink.c:212
 vfs_symlink+0x29e/0x470 fs/namei.c:4437
 do_symlinkat+0x24a/0x5d0 fs/namei.c:4466
 __do_sys_symlinkat fs/namei.c:4483 [inline]
 __se_sys_symlinkat fs/namei.c:4480 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4480
 x64_sys_call+0x74b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:267
 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: 0033:0x7f7102dc9f99
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:00007ffedb5a8348 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007f7103051fa0 RCX: 00007f7102dc9f99
RDX: 0000200000000340 RSI: ffffffffffffff9c RDI: 0000200000000300
RBP: 00007f7102e60ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7103051fac R14: 00007f7103051fa0 R15: 00007f7103051fa0
 </TASK>
---[ end trace 7553df31d7403580 ]---

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_write include/linux/instrumented.h:86 [inline]
BUG: KASAN: use-after-free in atomic_set include/linux/atomic/atomic-instrumented.h:41 [inline]
BUG: KASAN: use-after-free in refcount_set include/linux/refcount.h:136 [inline]
BUG: KASAN: use-after-free in refcount_warn_saturate+0x1e/0x1a0 lib/refcount.c:15
Write of size 4 at addr ffff8881135d401c by task syz.0.5358/5770

CPU: 1 PID: 5770 Comm: syz.0.5358 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
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
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_write include/linux/instrumented.h:86 [inline]
 atomic_set include/linux/atomic/atomic-instrumented.h:41 [inline]
 refcount_set include/linux/refcount.h:136 [inline]
 refcount_warn_saturate+0x1e/0x1a0 lib/refcount.c:15
 __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]
 config_item_get+0x8c/0x90 fs/configfs/item.c:104
 configfs_get_config_item fs/configfs/configfs_internal.h:128 [inline]
 get_target fs/configfs/symlink.c:125 [inline]
 configfs_symlink+0x44f/0x1330 fs/configfs/symlink.c:191
 vfs_symlink+0x29e/0x470 fs/namei.c:4437
 do_symlinkat+0x24a/0x5d0 fs/namei.c:4466
 __do_sys_symlinkat fs/namei.c:4483 [inline]
 __se_sys_symlinkat fs/namei.c:4480 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4480
 x64_sys_call+0x74b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:267
 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: 0033:0x7f7102dc9f99
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:00007ffedb5a8348 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007f7103051fa0 RCX: 00007f7102dc9f99
RDX: 0000200000000340 RSI: ffffffffffffff9c RDI: 0000200000000300
RBP: 00007f7102e60ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7103051fac R14: 00007f7103051fa0 R15: 00007f7103051fa0
 </TASK>

Allocated by task 5767:
 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]
 afunc_alloc_inst+0x4c/0x560 drivers/usb/gadget/function/f_uac2.c:1917
 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_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 5767:
 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
 afunc_free_inst+0x15/0x20 drivers/usb/gadget/function/f_uac2.c:1910
 usb_put_function_instance+0x85/0xa0 drivers/usb/gadget/functions.c:77
 f_uac2_attr_release+0x15/0x20 drivers/usb/gadget/function/f_uac2.c:1739
 config_item_cleanup fs/configfs/item.c:128 [inline]
 config_item_release fs/configfs/item.c:137 [inline]
 kref_put include/linux/kref.h:65 [inline]
 config_item_put+0x158/0x210 fs/configfs/item.c:149
 configfs_rmdir+0x89f/0x960 fs/configfs/dir.c:1540
 vfs_rmdir+0x1ae/0x450 fs/namei.c:4157
 do_rmdir+0x261/0x6b0 fs/namei.c:4218
 __do_sys_unlinkat fs/namei.c:4398 [inline]
 __se_sys_unlinkat fs/namei.c:4392 [inline]
 __x64_sys_unlinkat+0xc7/0xf0 fs/namei.c:4392
 x64_sys_call+0x4c0/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:264
 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 ffff8881135d4000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 28 bytes inside of
 512-byte region [ffff8881135d4000, ffff8881135d4200)
The buggy address belongs to the page:
page:ffffea00044d7500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1135d4
head:ffffea00044d7500 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 357, ts 29443303786, free_ts 28344064655
 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_track_caller+0x169/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x210/0x730 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 ndisc_alloc_skb net/ipv6/ndisc.c:422 [inline]
 ndisc_send_ns+0x347/0xb10 net/ipv6/ndisc.c:631
 addrconf_dad_work+0x9fa/0x1510 net/ipv6/addrconf.c:4225
 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328
 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475
 kthread+0x3f5/0x4f0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
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]
 __kmalloc_track_caller+0x11f/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x210/0x730 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1186 [inline]
 netlink_sendmsg+0x611/0xb80 net/netlink/af_netlink.c:1902

Memory state around the buggy address:
 ffff8881135d3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881135d3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881135d4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8881135d4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881135d4100: 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: 5770 at lib/refcount.c:25 refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Modules linked in:
CPU: 1 PID: 5770 Comm: syz.0.5358 Tainted: G    B             syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Code: 04 01 48 c7 c7 80 47 63 85 e8 c8 47 5a 02 0f 0b eb df e8 5f 80 19 ff c6 05 1b ea 95 04 01 48 c7 c7 c0 46 63 85 e8 ac 47 5a 02 <0f> 0b eb c3 e8 43 80 19 ff c6 05 00 ea 95 04 01 48 c7 c7 20 47 63
RSP: 0018:ffffc90003f8fc58 EFLAGS: 00010246
RAX: 62d462b274f9c600 RBX: 0000000000000002 RCX: ffff88810dd10000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003f8fc68 R08: ffffc90003f8f6c7 R09: 1ffff920007f1ed8
R10: dffffc0000000000 R11: fffff520007f1ed9 R12: ffff88811e745210
R13: dffffc0000000000 R14: 0000000000000002 R15: 0000000000000000
FS:  00005555759e7500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f08c7d1f060 CR3: 000000010f549000 CR4: 00000000003506a0
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]
 config_item_get+0x8c/0x90 fs/configfs/item.c:104
 configfs_get_config_item fs/configfs/configfs_internal.h:128 [inline]
 get_target fs/configfs/symlink.c:125 [inline]
 configfs_symlink+0x44f/0x1330 fs/configfs/symlink.c:191
 vfs_symlink+0x29e/0x470 fs/namei.c:4437
 do_symlinkat+0x24a/0x5d0 fs/namei.c:4466
 __do_sys_symlinkat fs/namei.c:4483 [inline]
 __se_sys_symlinkat fs/namei.c:4480 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4480
 x64_sys_call+0x74b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:267
 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: 0033:0x7f7102dc9f99
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:00007ffedb5a8348 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007f7103051fa0 RCX: 00007f7102dc9f99
RDX: 0000200000000340 RSI: ffffffffffffff9c RDI: 0000200000000300
RBP: 00007f7102e60ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7103051fac R14: 00007f7103051fa0 R15: 00007f7103051fa0
 </TASK>
---[ end trace 7553df31d740357f ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 5770 at lib/refcount.c:28 refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 5770 Comm: syz.0.5358 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Code: 04 01 48 c7 c7 c0 46 63 85 e8 ac 47 5a 02 0f 0b eb c3 e8 43 80 19 ff c6 05 00 ea 95 04 01 48 c7 c7 20 47 63 85 e8 90 47 5a 02 <0f> 0b eb a7 e8 27 80 19 ff c6 05 e1 e9 95 04 01 48 c7 c7 60 46 63
RSP: 0018:ffffc90003f8fc38 EFLAGS: 00010246
RAX: 62d462b274f9c600 RBX: 0000000000000003 RCX: ffff88810dd10000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90003f8fc48 R08: ffff8881f7132f3f R09: 1ffff1103ee265e7
R10: dffffc0000000000 R11: ffffed103ee265e8 R12: 00000000ffffffea
R13: dffffc0000000000 R14: 0000000000000003 R15: 00000000c0000000
FS:  00005555759e7500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30a63fff CR3: 000000010f549000 CR4: 00000000003506a0
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]
 config_item_put+0x200/0x210 fs/configfs/item.c:149
 configfs_symlink+0x4a6/0x1330 fs/configfs/symlink.c:212
 vfs_symlink+0x29e/0x470 fs/namei.c:4437
 do_symlinkat+0x24a/0x5d0 fs/namei.c:4466
 __do_sys_symlinkat fs/namei.c:4483 [inline]
 __se_sys_symlinkat fs/namei.c:4480 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4480
 x64_sys_call+0x74b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:267
 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: 0033:0x7f7102dc9f99
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:00007ffedb5a8348 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007f7103051fa0 RCX: 00007f7102dc9f99
RDX: 0000200000000340 RSI: ffffffffffffff9c RDI: 0000200000000300
RBP: 00007f7102e60ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7103051fac R14: 00007f7103051fa0 R15: 00007f7103051fa0
 </TASK>
---[ end trace 7553df31d7403580 ]---