Extracting prog: 6m13.550391226s
Minimizing prog: 1h14m6.127724745s
Simplifying prog options: 13m18.67414667s
Extracting C: 3m48.940794253s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs: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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs: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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program crashed: KASAN: use-after-free Read in worker_thread
single: successfully extracted reproducer
found reproducer with 6 syscalls
minimizing guilty program
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
syz_usb_control_io$cdc_ncm(0xffffffffffffffff, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(0xffffffffffffffff, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(0xffffffffffffffff, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(0xffffffffffffffff, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(0xffffffffffffffff, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)

program did not crash
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, 0x0}, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program crashed: KASAN: use-after-free Read in worker_thread
extracting C reproducer
testing compiled C program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
program crashed: KASAN: use-after-free Read in process_one_work
a never seen crash title: KASAN: use-after-free Read in process_one_work, ignore
testing program (duration=7m16.698810489s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm-syz_usb_control_io$cdc_ncm
detailed listing:
executing program 0:
r0 = syz_usb_connect$cdc_ncm(0x0, 0x6e, &(0x7f0000000480)={{0x12, 0x1, 0x0, 0x2, 0x0, 0x0, 0x40, 0x525, 0xa4a1, 0x40, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x5c, 0x2, 0x1, 0x0, 0x0, 0x0, {{0x9, 0x4, 0x0, 0x0, 0x1, 0x2, 0xd, 0x0, 0x0, {{0x5}, {0x5}, {0xd}, {0x6}}, {{0x9, 0x5, 0x81, 0x3, 0x200}}}, {}, {0x9, 0x4, 0x1, 0x1, 0x2, 0x2, 0xd, 0x0, 0x0, "", {{{0x9, 0x5, 0x82, 0x2, 0x200}}, {{0x9, 0x5, 0x3, 0x2, 0x200}}}}}}}]}}, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, 0x0, &(0x7f0000000340)={0x44, 0x0, 0x0, 0x0, &(0x7f0000000400)={0x20, 0x80, 0x1c, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0, 0x4, 0x1}}, 0x0, 0x0, 0x0, 0x0})
syz_usb_control_io$cdc_ncm(r0, 0x0, 0x0)
syz_usb_control_io$cdc_ncm(r0, &(0x7f0000000080)={0x14, 0x0, &(0x7f0000000040)={0x0, 0x3, 0x1a, {0x1a}}}, 0x0)

program did not crash
reproducing took 1h38m46.917933586s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in worker_thread+0xa36/0x1260 kernel/workqueue.c:2444
Read of size 8 at addr ffff888117ee8ce0 by task kworker/1:5/965

CPU: 1 PID: 965 Comm: kworker/1:5 Not tainted 6.1.118-syzkaller-00074-g3e3f2b9e9fca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue:  0x0 (pm)
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
 worker_thread+0xa36/0x1260 kernel/workqueue.c:2444
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Allocated by task 1837:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node+0xb4/0x1e0 mm/slab_common.c:945
 kmalloc_node include/linux/slab.h:583 [inline]
 kvmalloc_node+0x221/0x640 mm/util.c:592
 kvmalloc include/linux/slab.h:710 [inline]
 kvzalloc include/linux/slab.h:718 [inline]
 alloc_netdev_mqs+0x8c/0xf90 net/core/dev.c:10647
 alloc_etherdev_mqs+0x36/0x40 net/ethernet/eth.c:384
 usbnet_probe+0x213/0x28a0 drivers/net/usb/usbnet.c:1709
 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:397
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:489
 device_add+0xb60/0xf10 drivers/base/core.c:3697
 usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:294
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:489
 device_add+0xb60/0xf10 drivers/base/core.c:3697
 usb_new_device+0xf2f/0x1820 drivers/usb/core/hub.c:2645
 hub_port_connect drivers/usb/core/hub.c:5554 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5694 [inline]
 port_event drivers/usb/core/hub.c:5854 [inline]
 hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5936
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Freed by task 1837:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3686 [inline]
 __kmem_cache_free+0x21d/0x410 mm/slub.c:3702
 kfree+0x7a/0xf0 mm/slab_common.c:990
 kvfree+0x35/0x40 mm/util.c:639
 netdev_freemem+0x3f/0x60 net/core/dev.c:10601
 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1904
 device_release+0x95/0x1c0
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x178/0x260 lib/kobject.c:729
 put_device+0x1f/0x30 drivers/base/core.c:3805
 free_netdev+0x393/0x480 net/core/dev.c:10794
 usbnet_disconnect+0x25f/0x3b0 drivers/net/usb/usbnet.c:1648
 usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:459
 device_remove drivers/base/dd.c:550 [inline]
 __device_release_driver drivers/base/dd.c:1283 [inline]
 device_release_driver_internal+0x53e/0x870 drivers/base/dd.c:1309
 device_release_driver+0x19/0x20 drivers/base/dd.c:1332
 bus_remove_device+0x2fa/0x360 drivers/base/bus.c:531
 device_del+0x663/0xe90 drivers/base/core.c:3885
 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1414
 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2300
 hub_port_connect drivers/usb/core/hub.c:5393 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5694 [inline]
 port_event drivers/usb/core/hub.c:5854 [inline]
 hub_event+0x1ed8/0x4830 drivers/usb/core/hub.c:5936
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 process_scheduled_works kernel/workqueue.c:2362 [inline]
 worker_thread+0xd71/0x1260 kernel/workqueue.c:2448
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 insert_work+0x56/0x310 kernel/workqueue.c:1368
 __queue_work+0x9b6/0xd70 kernel/workqueue.c:1527
 queue_work_on+0x105/0x170 kernel/workqueue.c:1555
 usbnet_link_change+0x182/0x1a0
 usbnet_probe+0x1e1e/0x28a0 drivers/net/usb/usbnet.c:1856
 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:397
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:489
 device_add+0xb60/0xf10 drivers/base/core.c:3697
 usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:294
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:489
 device_add+0xb60/0xf10 drivers/base/core.c:3697
 usb_new_device+0xf2f/0x1820 drivers/usb/core/hub.c:2645
 hub_port_connect drivers/usb/core/hub.c:5554 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5694 [inline]
 port_event drivers/usb/core/hub.c:5854 [inline]
 hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5936
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

The buggy address belongs to the object at ffff888117ee8000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3296 bytes inside of
 4096-byte region [ffff888117ee8000, ffff888117ee9000)

The buggy address belongs to the physical page:
page:ffffea00045fba00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x117ee8
head:ffffea00045fba00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000001 ffff888100043380
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 632, tgid 632 (syz-executor), ts 287358398583, free_ts 287286409171
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
 get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4462
 __alloc_pages+0x234/0x610 mm/page_alloc.c:5759
 alloc_slab_page+0x6c/0xf0
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x90/0x3e0 mm/slub.c:2015
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
 __slab_alloc+0x5d/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node_track_caller+0xa2/0x1e0 mm/slab_common.c:958
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 __alloc_skb+0x125/0x2d0 net/core/skbuff.c:515
 alloc_skb include/linux/skbuff.h:1290 [inline]
 nlmsg_new include/net/netlink.h:991 [inline]
 rtmsg_ifinfo_build_skb+0x7f/0x180 net/core/rtnetlink.c:3963
 rtmsg_ifinfo_event net/core/rtnetlink.c:3999 [inline]
 rtmsg_ifinfo+0x78/0x120 net/core/rtnetlink.c:4008
 __dev_notify_flags+0xdd/0x610 net/core/dev.c:8643
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8685
 do_setlink+0xdb8/0x4050 net/core/rtnetlink.c:2830
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1498 [inline]
 free_pcp_prepare mm/page_alloc.c:1572 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3511
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3607
 free_the_page mm/page_alloc.c:798 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5848
 __free_slab+0xce/0x1a0 mm/slub.c:2039
 free_slab mm/slub.c:2054 [inline]
 discard_slab mm/slub.c:2060 [inline]
 __unfreeze_partials+0x165/0x1a0 mm/slub.c:2609
 put_cpu_partial+0xa9/0x100 mm/slub.c:2685
 __slab_free+0x1c8/0x280 mm/slub.c:3563
 do_slab_free mm/slub.c:3640 [inline]
 ___cache_free+0xc6/0xd0 mm/slub.c:3696
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0xc5/0x140 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310
 kasan_slab_alloc include/linux/kasan.h:202 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768
 slab_alloc_node mm/slub.c:3421 [inline]
 kmem_cache_alloc_node+0x188/0x330 mm/slub.c:3468
 __alloc_skb+0xcc/0x2d0 net/core/skbuff.c:505
 alloc_skb include/linux/skbuff.h:1290 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1199 [inline]
 netlink_sendmsg+0x7a6/0xd30 net/netlink/af_netlink.c:1850
 sock_sendmsg_nosec net/socket.c:716 [inline]
 __sock_sendmsg net/socket.c:728 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2143

Memory state around the buggy address:
 ffff888117ee8b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888117ee8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888117ee8c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff888117ee8d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888117ee8d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
usb 6-1: new high-speed USB device number 45 using dummy_hcd
usb 6-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 6-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40
usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 6-1: Product: syz
usb 6-1: Manufacturer: syz
usb 6-1: SerialNumber: syz
cdc_ncm 6-1:1.0: MAC-Address: 42:42:42:42:42:42
cdc_ncm 6-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048
cdc_ncm 6-1:1.0: setting rx_max = 2048
cdc_ncm 6-1:1.0: setting tx_max = 184
cdc_ncm 6-1:1.0 eth1: register 'cdc_ncm' at usb-dummy_hcd.5-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 6-1: USB disconnect, device number 45
cdc_ncm 6-1:1.0 eth1: unregister 'cdc_ncm' usb-dummy_hcd.5-1, CDC NCM (NO ZLP)
usb 2-1: new high-speed USB device number 46 using dummy_hcd
usb 2-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 2-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40
usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 2-1: Product: syz
usb 2-1: Manufacturer: syz
usb 2-1: SerialNumber: syz
cdc_ncm 2-1:1.0: MAC-Address: 42:42:42:42:42:42
cdc_ncm 2-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048
cdc_ncm 2-1:1.0: setting rx_max = 2048
cdc_ncm 2-1:1.0: setting tx_max = 184
cdc_ncm 2-1:1.0 eth2: register 'cdc_ncm' at usb-dummy_hcd.1-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 2-1: USB disconnect, device number 46
cdc_ncm 2-1:1.0 eth2: unregister 'cdc_ncm' usb-dummy_hcd.1-1, CDC NCM (NO ZLP)
usb 6-1: new high-speed USB device number 47 using dummy_hcd
usb 6-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 6-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40
usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 6-1: Product: syz
usb 6-1: Manufacturer: syz
usb 6-1: SerialNumber: syz
cdc_ncm 6-1:1.0: MAC-Address: 42:42:42:42:42:42
cdc_ncm 6-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048
cdc_ncm 6-1:1.0: setting rx_max = 2048
cdc_ncm 6-1:1.0: setting tx_max = 184
cdc_ncm 6-1:1.0 eth1: register 'cdc_ncm' at usb-dummy_hcd.5-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 6-1: USB disconnect, device number 47
cdc_ncm 6-1:1.0 eth1: unregister 'cdc_ncm' usb-dummy_hcd.5-1, CDC NCM (NO ZLP)
usb 5-1: new high-speed USB device number 48 using dummy_hcd
usb 5-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 5-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40
usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 5-1: Product: syz
usb 5-1: Manufacturer: syz
usb 5-1: SerialNumber: syz
cdc_ncm 5-1:1.0: MAC-Address: 42:42:42:42:42:42
cdc_ncm 5-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048
cdc_ncm 5-1:1.0: setting rx_max = 2048
cdc_ncm 5-1:1.0: setting tx_max = 184
cdc_ncm 5-1:1.0 eth1: register 'cdc_ncm' at usb-dummy_hcd.4-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 5-1: USB disconnect, device number 48
cdc_ncm 5-1:1.0 eth1: unregister 'cdc_ncm' usb-dummy_hcd.4-1, CDC NCM (NO ZLP)

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in worker_thread+0xa36/0x1260 kernel/workqueue.c:2444
Read of size 8 at addr ffff888117ee8ce0 by task kworker/1:5/965

CPU: 1 PID: 965 Comm: kworker/1:5 Not tainted 6.1.118-syzkaller-00074-g3e3f2b9e9fca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue:  0x0 (pm)
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
 worker_thread+0xa36/0x1260 kernel/workqueue.c:2444
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Allocated by task 1837:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node+0xb4/0x1e0 mm/slab_common.c:945
 kmalloc_node include/linux/slab.h:583 [inline]
 kvmalloc_node+0x221/0x640 mm/util.c:592
 kvmalloc include/linux/slab.h:710 [inline]
 kvzalloc include/linux/slab.h:718 [inline]
 alloc_netdev_mqs+0x8c/0xf90 net/core/dev.c:10647
 alloc_etherdev_mqs+0x36/0x40 net/ethernet/eth.c:384
 usbnet_probe+0x213/0x28a0 drivers/net/usb/usbnet.c:1709
 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:397
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:489
 device_add+0xb60/0xf10 drivers/base/core.c:3697
 usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:294
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:489
 device_add+0xb60/0xf10 drivers/base/core.c:3697
 usb_new_device+0xf2f/0x1820 drivers/usb/core/hub.c:2645
 hub_port_connect drivers/usb/core/hub.c:5554 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5694 [inline]
 port_event drivers/usb/core/hub.c:5854 [inline]
 hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5936
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Freed by task 1837:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3686 [inline]
 __kmem_cache_free+0x21d/0x410 mm/slub.c:3702
 kfree+0x7a/0xf0 mm/slab_common.c:990
 kvfree+0x35/0x40 mm/util.c:639
 netdev_freemem+0x3f/0x60 net/core/dev.c:10601
 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1904
 device_release+0x95/0x1c0
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x178/0x260 lib/kobject.c:729
 put_device+0x1f/0x30 drivers/base/core.c:3805
 free_netdev+0x393/0x480 net/core/dev.c:10794
 usbnet_disconnect+0x25f/0x3b0 drivers/net/usb/usbnet.c:1648
 usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:459
 device_remove drivers/base/dd.c:550 [inline]
 __device_release_driver drivers/base/dd.c:1283 [inline]
 device_release_driver_internal+0x53e/0x870 drivers/base/dd.c:1309
 device_release_driver+0x19/0x20 drivers/base/dd.c:1332
 bus_remove_device+0x2fa/0x360 drivers/base/bus.c:531
 device_del+0x663/0xe90 drivers/base/core.c:3885
 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1414
 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2300
 hub_port_connect drivers/usb/core/hub.c:5393 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5694 [inline]
 port_event drivers/usb/core/hub.c:5854 [inline]
 hub_event+0x1ed8/0x4830 drivers/usb/core/hub.c:5936
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 process_scheduled_works kernel/workqueue.c:2362 [inline]
 worker_thread+0xd71/0x1260 kernel/workqueue.c:2448
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 insert_work+0x56/0x310 kernel/workqueue.c:1368
 __queue_work+0x9b6/0xd70 kernel/workqueue.c:1527
 queue_work_on+0x105/0x170 kernel/workqueue.c:1555
 usbnet_link_change+0x182/0x1a0
 usbnet_probe+0x1e1e/0x28a0 drivers/net/usb/usbnet.c:1856
 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:397
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:489
 device_add+0xb60/0xf10 drivers/base/core.c:3697
 usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:294
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:489
 device_add+0xb60/0xf10 drivers/base/core.c:3697
 usb_new_device+0xf2f/0x1820 drivers/usb/core/hub.c:2645
 hub_port_connect drivers/usb/core/hub.c:5554 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5694 [inline]
 port_event drivers/usb/core/hub.c:5854 [inline]
 hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5936
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

The buggy address belongs to the object at ffff888117ee8000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3296 bytes inside of
 4096-byte region [ffff888117ee8000, ffff888117ee9000)

The buggy address belongs to the physical page:
page:ffffea00045fba00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x117ee8
head:ffffea00045fba00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000001 ffff888100043380
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 632, tgid 632 (syz-executor), ts 287358398583, free_ts 287286409171
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
 get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4462
 __alloc_pages+0x234/0x610 mm/page_alloc.c:5759
 alloc_slab_page+0x6c/0xf0
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x90/0x3e0 mm/slub.c:2015
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
 __slab_alloc+0x5d/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node_track_caller+0xa2/0x1e0 mm/slab_common.c:958
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 __alloc_skb+0x125/0x2d0 net/core/skbuff.c:515
 alloc_skb include/linux/skbuff.h:1290 [inline]
 nlmsg_new include/net/netlink.h:991 [inline]
 rtmsg_ifinfo_build_skb+0x7f/0x180 net/core/rtnetlink.c:3963
 rtmsg_ifinfo_event net/core/rtnetlink.c:3999 [inline]
 rtmsg_ifinfo+0x78/0x120 net/core/rtnetlink.c:4008
 __dev_notify_flags+0xdd/0x610 net/core/dev.c:8643
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8685
 do_setlink+0xdb8/0x4050 net/core/rtnetlink.c:2830
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1498 [inline]
 free_pcp_prepare mm/page_alloc.c:1572 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3511
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3607
 free_the_page mm/page_alloc.c:798 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5848
 __free_slab+0xce/0x1a0 mm/slub.c:2039
 free_slab mm/slub.c:2054 [inline]
 discard_slab mm/slub.c:2060 [inline]
 __unfreeze_partials+0x165/0x1a0 mm/slub.c:2609
 put_cpu_partial+0xa9/0x100 mm/slub.c:2685
 __slab_free+0x1c8/0x280 mm/slub.c:3563
 do_slab_free mm/slub.c:3640 [inline]
 ___cache_free+0xc6/0xd0 mm/slub.c:3696
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0xc5/0x140 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310
 kasan_slab_alloc include/linux/kasan.h:202 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768
 slab_alloc_node mm/slub.c:3421 [inline]
 kmem_cache_alloc_node+0x188/0x330 mm/slub.c:3468
 __alloc_skb+0xcc/0x2d0 net/core/skbuff.c:505
 alloc_skb include/linux/skbuff.h:1290 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1199 [inline]
 netlink_sendmsg+0x7a6/0xd30 net/netlink/af_netlink.c:1850
 sock_sendmsg_nosec net/socket.c:716 [inline]
 __sock_sendmsg net/socket.c:728 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2143

Memory state around the buggy address:
 ffff888117ee8b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888117ee8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888117ee8c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff888117ee8d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888117ee8d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
usb 6-1: new high-speed USB device number 45 using dummy_hcd
usb 6-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 6-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40
usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 6-1: Product: syz
usb 6-1: Manufacturer: syz
usb 6-1: SerialNumber: syz
cdc_ncm 6-1:1.0: MAC-Address: 42:42:42:42:42:42
cdc_ncm 6-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048
cdc_ncm 6-1:1.0: setting rx_max = 2048
cdc_ncm 6-1:1.0: setting tx_max = 184
cdc_ncm 6-1:1.0 eth1: register 'cdc_ncm' at usb-dummy_hcd.5-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 6-1: USB disconnect, device number 45
cdc_ncm 6-1:1.0 eth1: unregister 'cdc_ncm' usb-dummy_hcd.5-1, CDC NCM (NO ZLP)
usb 2-1: new high-speed USB device number 46 using dummy_hcd
usb 2-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 2-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40
usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 2-1: Product: syz
usb 2-1: Manufacturer: syz
usb 2-1: SerialNumber: syz
cdc_ncm 2-1:1.0: MAC-Address: 42:42:42:42:42:42
cdc_ncm 2-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048
cdc_ncm 2-1:1.0: setting rx_max = 2048
cdc_ncm 2-1:1.0: setting tx_max = 184
cdc_ncm 2-1:1.0 eth2: register 'cdc_ncm' at usb-dummy_hcd.1-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 2-1: USB disconnect, device number 46
cdc_ncm 2-1:1.0 eth2: unregister 'cdc_ncm' usb-dummy_hcd.1-1, CDC NCM (NO ZLP)
usb 6-1: new high-speed USB device number 47 using dummy_hcd
usb 6-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 6-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40
usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 6-1: Product: syz
usb 6-1: Manufacturer: syz
usb 6-1: SerialNumber: syz
cdc_ncm 6-1:1.0: MAC-Address: 42:42:42:42:42:42
cdc_ncm 6-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048
cdc_ncm 6-1:1.0: setting rx_max = 2048
cdc_ncm 6-1:1.0: setting tx_max = 184
cdc_ncm 6-1:1.0 eth1: register 'cdc_ncm' at usb-dummy_hcd.5-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 6-1: USB disconnect, device number 47
cdc_ncm 6-1:1.0 eth1: unregister 'cdc_ncm' usb-dummy_hcd.5-1, CDC NCM (NO ZLP)
usb 5-1: new high-speed USB device number 48 using dummy_hcd
usb 5-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 5-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40
usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 5-1: Product: syz
usb 5-1: Manufacturer: syz
usb 5-1: SerialNumber: syz
cdc_ncm 5-1:1.0: MAC-Address: 42:42:42:42:42:42
cdc_ncm 5-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048
cdc_ncm 5-1:1.0: setting rx_max = 2048
cdc_ncm 5-1:1.0: setting tx_max = 184
cdc_ncm 5-1:1.0 eth1: register 'cdc_ncm' at usb-dummy_hcd.4-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 5-1: USB disconnect, device number 48
cdc_ncm 5-1:1.0 eth1: unregister 'cdc_ncm' usb-dummy_hcd.4-1, CDC NCM (NO ZLP)