Extracting prog: 1m11.996831884s
Minimizing prog: 11m35.895183753s
Simplifying prog options: 1m40.413836525s
Extracting C: 1m9.706826052s
Simplifying C: 4m10.260271155s


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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program crashed: KASAN: use-after-free Read in roccat_disconnect
single: successfully extracted reproducer
found reproducer with 6 syscalls
minimizing guilty program
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
syz_usb_control_io$hid(0xffffffffffffffff, 0x0, 0x0)
syz_usb_control_io$hid(0xffffffffffffffff, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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}}): mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', 0x0, 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, 0x0, 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, 0x0, 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program did not crash
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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)

program did not crash
extracting C reproducer
testing compiled C 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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
program did not crash
simplifying guilty program options
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program crashed: KASAN: use-after-free Read in roccat_disconnect
extracting C reproducer
testing compiled C program (duration=30s, {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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
program crashed: KASAN: use-after-free Read in roccat_disconnect
simplifying C reproducer
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
program did not crash
testing compiled C program (duration=30s, {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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
program crashed: KASAN: use-after-free Read in roccat_disconnect
testing compiled C program (duration=30s, {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-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
program crashed: KASAN: use-after-free Read in roccat_disconnect
testing compiled C program (duration=30s, {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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
program crashed: KASAN: use-after-free Write in roccat_open
a never seen crash title: KASAN: use-after-free Write in roccat_open, ignore
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program crashed: KASAN: use-after-free Read in roccat_disconnect
validation run: crashed=true
testing program (duration=30s, {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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program crashed: KASAN: use-after-free Read in roccat_disconnect
validation run: crashed=true
testing program (duration=30s, {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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-syz_usb_connect$hid-syz_usb_control_io$hid-syz_usb_control_io$hid-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./dev_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./dev_mnt\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
r0 = syz_usb_connect$hid(0x0, 0x36, &(0x7f0000000040)=ANY=[@ANYBLOB="12010000000000407d1e5a2d000000000001090224000100000000090400000103010200092100000001222200090581030800000000"], 0x0)
syz_usb_control_io$hid(r0, 0x0, 0x0)
syz_usb_control_io$hid(r0, &(0x7f00000001c0)={0x24, 0x0, 0x0, &(0x7f0000000000)=ANY=[@ANYBLOB="00222200000096231306e53f070c0000002a900000000000006fd200000000000000150b5d8c3dda"], 0x0}, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./dev_mnt/roccatsavu0\x00', 0x2, 0x0)

program crashed: KASAN: use-after-free Read in roccat_disconnect
validation run: crashed=true
reproducing took 21m20.454184916s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in roccat_disconnect+0x22d/0x240 drivers/hid/hid-roccat.c:382
Read of size 4 at addr ffff88811145ec08 by task kworker/0:4/396

CPU: 0 PID: 396 Comm: kworker/0:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event

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_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 roccat_disconnect+0x22d/0x240 drivers/hid/hid-roccat.c:382
 savu_remove_specials drivers/hid/hid-roccat-savu.c:107 [inline]
 savu_remove+0xec/0x170 drivers/hid/hid-roccat-savu.c:147
 hid_device_remove+0xba/0x170 drivers/hid/hid-core.c:2392
 __device_release_driver drivers/base/dd.c:1227 [inline]
 device_release_driver_internal+0x4e8/0x7c0 drivers/base/dd.c:1262
 device_release_driver+0x19/0x20 drivers/base/dd.c:1285
 bus_remove_device+0x2df/0x340 drivers/base/bus.c:531
 device_del+0x62e/0xe20 drivers/base/core.c:3610
 hid_remove_device drivers/hid/hid-core.c:2561 [inline]
 hid_destroy_device+0x6a/0x110 drivers/hid/hid-core.c:2580
 usbhid_disconnect+0x9f/0xc0 drivers/hid/usbhid/hid-core.c:1469
 usb_unbind_interface+0x212/0x8a0 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1229 [inline]
 device_release_driver_internal+0x536/0x7c0 drivers/base/dd.c:1262
 device_release_driver+0x19/0x20 drivers/base/dd.c:1285
 bus_remove_device+0x2df/0x340 drivers/base/bus.c:531
 device_del+0x62e/0xe20 drivers/base/core.c:3610
 usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1472
 usb_disconnect+0x32d/0x870 drivers/usb/core/hub.c:2293
 hub_port_connect drivers/usb/core/hub.c:5399 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5700 [inline]
 port_event drivers/usb/core/hub.c:5866 [inline]
 hub_event+0x19b0/0x43f0 drivers/usb/core/hub.c:5948
 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
 </TASK>

Allocated by task 39:
 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]
 roccat_connect+0x5c/0x4b0 drivers/hid/hid-roccat.c:315
 savu_init_specials drivers/hid/hid-roccat-savu.c:81 [inline]
 savu_probe+0x1ba/0x360 drivers/hid/hid-roccat-savu.c:131
 hid_device_probe+0x28d/0x390 drivers/hid/hid-core.c:2363
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 hid_add_device+0x349/0x4b0 drivers/hid/hid-core.c:2513
 usbhid_probe+0xb93/0xf30 drivers/hid/usbhid/hid-core.c:1442
 usb_probe_interface+0x60f/0xb20 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 usb_set_configuration+0x1a01/0x1f70 drivers/usb/core/message.c:2223
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x143/0x250 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 usb_new_device+0xa1f/0x1720 drivers/usb/core/hub.c:2643
 hub_port_connect drivers/usb/core/hub.c:5560 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5700 [inline]
 port_event drivers/usb/core/hub.c:5866 [inline]
 hub_event+0x291b/0x43f0 drivers/usb/core/hub.c:5948
 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

Freed by task 416:
 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
 roccat_free_device+0x27b/0x280 drivers/hid/hid-roccat.c:79
 roccat_release+0x2ae/0x370 drivers/hid/hid-roccat.c:238
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:184
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:217
 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:310
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88811145ec00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
 512-byte region [ffff88811145ec00, ffff88811145ee00)
The buggy address belongs to the page:
page:ffffea0004451700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11145c
head:ffffea0004451700 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000000100010 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 39, ts 34349716573, free_ts 30189803566
 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]
 kmem_cache_alloc_trace+0x146/0x270 mm/slub.c:3272
 kmalloc include/linux/slab.h:619 [inline]
 kzalloc include/linux/slab.h:750 [inline]
 roccat_connect+0x5c/0x4b0 drivers/hid/hid-roccat.c:315
 savu_init_specials drivers/hid/hid-roccat-savu.c:81 [inline]
 savu_probe+0x1ba/0x360 drivers/hid/hid-roccat-savu.c:131
 hid_device_probe+0x28d/0x390 drivers/hid/hid-core.c:2363
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
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]
 nlmsg_new include/net/netlink.h:953 [inline]
 rtmsg_ifinfo_build_skb+0x75/0x180 net/core/rtnetlink.c:3896

Memory state around the buggy address:
 ffff88811145eb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811145eb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811145ec00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88811145ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811145ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
usb 1-1: new high-speed USB device number 4 using dummy_hcd
usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 1-1: New USB device found, idVendor=1e7d, idProduct=2d5a, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: hidraw1: USB HID v0.00 Device [HID 1e7d:2d5a] on usb-dummy_hcd.0-1/input0
usb 1-1: USB disconnect, device number 4
usb 1-1: new high-speed USB device number 8 using dummy_hcd

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in roccat_disconnect+0x22d/0x240 drivers/hid/hid-roccat.c:382
Read of size 4 at addr ffff88811145ec08 by task kworker/0:4/396

CPU: 0 PID: 396 Comm: kworker/0:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event

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_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 roccat_disconnect+0x22d/0x240 drivers/hid/hid-roccat.c:382
 savu_remove_specials drivers/hid/hid-roccat-savu.c:107 [inline]
 savu_remove+0xec/0x170 drivers/hid/hid-roccat-savu.c:147
 hid_device_remove+0xba/0x170 drivers/hid/hid-core.c:2392
 __device_release_driver drivers/base/dd.c:1227 [inline]
 device_release_driver_internal+0x4e8/0x7c0 drivers/base/dd.c:1262
 device_release_driver+0x19/0x20 drivers/base/dd.c:1285
 bus_remove_device+0x2df/0x340 drivers/base/bus.c:531
 device_del+0x62e/0xe20 drivers/base/core.c:3610
 hid_remove_device drivers/hid/hid-core.c:2561 [inline]
 hid_destroy_device+0x6a/0x110 drivers/hid/hid-core.c:2580
 usbhid_disconnect+0x9f/0xc0 drivers/hid/usbhid/hid-core.c:1469
 usb_unbind_interface+0x212/0x8a0 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1229 [inline]
 device_release_driver_internal+0x536/0x7c0 drivers/base/dd.c:1262
 device_release_driver+0x19/0x20 drivers/base/dd.c:1285
 bus_remove_device+0x2df/0x340 drivers/base/bus.c:531
 device_del+0x62e/0xe20 drivers/base/core.c:3610
 usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1472
 usb_disconnect+0x32d/0x870 drivers/usb/core/hub.c:2293
 hub_port_connect drivers/usb/core/hub.c:5399 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5700 [inline]
 port_event drivers/usb/core/hub.c:5866 [inline]
 hub_event+0x19b0/0x43f0 drivers/usb/core/hub.c:5948
 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
 </TASK>

Allocated by task 39:
 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]
 roccat_connect+0x5c/0x4b0 drivers/hid/hid-roccat.c:315
 savu_init_specials drivers/hid/hid-roccat-savu.c:81 [inline]
 savu_probe+0x1ba/0x360 drivers/hid/hid-roccat-savu.c:131
 hid_device_probe+0x28d/0x390 drivers/hid/hid-core.c:2363
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 hid_add_device+0x349/0x4b0 drivers/hid/hid-core.c:2513
 usbhid_probe+0xb93/0xf30 drivers/hid/usbhid/hid-core.c:1442
 usb_probe_interface+0x60f/0xb20 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 usb_set_configuration+0x1a01/0x1f70 drivers/usb/core/message.c:2223
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x143/0x250 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 usb_new_device+0xa1f/0x1720 drivers/usb/core/hub.c:2643
 hub_port_connect drivers/usb/core/hub.c:5560 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5700 [inline]
 port_event drivers/usb/core/hub.c:5866 [inline]
 hub_event+0x291b/0x43f0 drivers/usb/core/hub.c:5948
 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

Freed by task 416:
 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
 roccat_free_device+0x27b/0x280 drivers/hid/hid-roccat.c:79
 roccat_release+0x2ae/0x370 drivers/hid/hid-roccat.c:238
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:184
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:217
 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:310
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88811145ec00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
 512-byte region [ffff88811145ec00, ffff88811145ee00)
The buggy address belongs to the page:
page:ffffea0004451700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11145c
head:ffffea0004451700 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000000100010 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 39, ts 34349716573, free_ts 30189803566
 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]
 kmem_cache_alloc_trace+0x146/0x270 mm/slub.c:3272
 kmalloc include/linux/slab.h:619 [inline]
 kzalloc include/linux/slab.h:750 [inline]
 roccat_connect+0x5c/0x4b0 drivers/hid/hid-roccat.c:315
 savu_init_specials drivers/hid/hid-roccat-savu.c:81 [inline]
 savu_probe+0x1ba/0x360 drivers/hid/hid-roccat-savu.c:131
 hid_device_probe+0x28d/0x390 drivers/hid/hid-core.c:2363
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
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]
 nlmsg_new include/net/netlink.h:953 [inline]
 rtmsg_ifinfo_build_skb+0x75/0x180 net/core/rtnetlink.c:3896

Memory state around the buggy address:
 ffff88811145eb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811145eb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811145ec00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88811145ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811145ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
usb 1-1: new high-speed USB device number 4 using dummy_hcd
usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 1-1: New USB device found, idVendor=1e7d, idProduct=2d5a, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: unknown main item tag 0x0
savu 0003:1E7D:2D5A.000D: hidraw1: USB HID v0.00 Device [HID 1e7d:2d5a] on usb-dummy_hcd.0-1/input0
usb 1-1: USB disconnect, device number 4
usb 1-1: new high-speed USB device number 8 using dummy_hcd