Extracting prog: 1m4.922813293s Minimizing prog: 14m28.712336428s Simplifying prog options: 0s Extracting C: 34.928987906s Simplifying C: 10m16.789095779s 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-mkdir-mount-mkdirat-mkdirat-openat-rmdir-mkdirat detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') mkdirat(0xffffffffffffff9c, 0x0, 0x1ff) program crashed: KASAN: use-after-free Read in check_tty_count single: successfully extracted reproducer found reproducer with 9 syscalls minimizing guilty program testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program crashed: KASAN: use-after-free Read in check_tty_count testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, 0x0, 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, 0x0, &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', 0x0, 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(0x0, 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, 0x0, &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, 0x0, 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, 0x0, 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program did not crash testing program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(0x0) program did not crash extracting C reproducer testing compiled C program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count simplifying C reproducer testing compiled C program (duration=32.406275242s, {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-mkdir-mount-mkdirat-mkdirat-openat-rmdir program did not crash testing compiled C program (duration=32.406275242s, {Threaded:true 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-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Write in release_tty a never seen crash title: KASAN: use-after-free Write in release_tty, ignore testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Write in release_tty a never seen crash title: KASAN: use-after-free Write in release_tty, ignore testing compiled C program (duration=32.406275242s, {Threaded:true 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-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in tty_open a never seen crash title: KASAN: use-after-free Read in tty_open, ignore testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in tty_open a never seen crash title: KASAN: use-after-free Read in tty_open, ignore testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Write in release_tty a never seen crash title: KASAN: use-after-free Write in release_tty, ignore testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count testing compiled C program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB: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-mkdir-mount-mkdirat-mkdirat-openat-rmdir program crashed: KASAN: use-after-free Read in check_tty_count testing program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB: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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program crashed: KASAN: use-after-free Read in check_tty_count validation run: crashed=true testing program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB: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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program crashed: KASAN: use-after-free Read in check_tty_count validation run: crashed=true testing program (duration=32.406275242s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB: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-mkdir-mount-mkdirat-mkdirat-openat-rmdir detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./dev\x00', 0x13b) mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0) mkdir(&(0x7f0000000180)='./config\x00', 0x14) mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./config/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff) openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0) rmdir(&(0x7f0000000100)='./config/usb_gadget/g1/functions/acm.usb0\x00') program crashed: KASAN: use-after-free Read in check_tty_count validation run: crashed=true reproducing took 28m47.006060717s repro crashed as (corrupted=false): ================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: use-after-free in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] BUG: KASAN: use-after-free in tty_port_kopened include/linux/tty_port.h:180 [inline] BUG: KASAN: use-after-free in check_tty_count+0x1a8/0x330 drivers/tty/tty_io.c:294 Read of size 8 at addr ffff888114311910 by task syz.0.17/398 CPU: 1 PID: 398 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x10f/0x150 mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189 __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31 instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] tty_port_kopened include/linux/tty_port.h:180 [inline] check_tty_count+0x1a8/0x330 drivers/tty/tty_io.c:294 tty_release+0xc9/0x1330 drivers/tty/tty_io.c:1756 __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:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb1e79720d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1d55fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb1e7bfbda0 RCX: 00007fb1e79720d9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb1e7bfbda0 R08: 00007fb1e7bfa038 R09: 0000000000000000 R10: 000000000003fda0 R11: 0000000000000246 R12: 000000000000809e R13: 00007fb1e7bf9fac R14: 0000000000007da1 R15: 00007ffe1d55ff70 Allocated by task 399: 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] gs_port_alloc drivers/usb/gadget/function/u_serial.c:1158 [inline] gserial_alloc_line_no_console+0x238/0x700 drivers/usb/gadget/function/u_serial.c:1238 gserial_alloc_line+0x15/0x20 drivers/usb/gadget/function/u_serial.c:1272 acm_alloc_instance+0x86/0xe0 drivers/usb/gadget/function/f_acm.c:845 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline] usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329 vfs_mkdir+0x38b/0x590 fs/namei.c:4073 do_mkdirat+0x174/0x4d0 fs/namei.c:4098 __do_sys_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4111 x64_sys_call+0x37e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 399: 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 gserial_free_port+0x245/0x2e0 drivers/usb/gadget/function/u_serial.c:1202 gserial_free_line+0x9b/0x1a0 drivers/usb/gadget/function/u_serial.c:1219 acm_free_instance+0x39/0x60 drivers/usb/gadget/function/f_acm.c:832 usb_put_function_instance+0x85/0xa0 drivers/usb/gadget/functions.c:77 acm_attr_release+0x15/0x20 drivers/usb/gadget/function/f_acm.c:781 config_item_cleanup fs/configfs/item.c:128 [inline] config_item_release fs/configfs/item.c:137 [inline] kref_put include/linux/kref.h:65 [inline] config_item_put+0x158/0x210 fs/configfs/item.c:149 configfs_rmdir+0x89f/0x960 fs/configfs/dir.c:1540 vfs_rmdir+0x1ae/0x450 fs/namei.c:4157 do_rmdir+0x261/0x6b0 fs/namei.c:4218 __do_sys_rmdir fs/namei.c:4237 [inline] __se_sys_rmdir fs/namei.c:4235 [inline] __x64_sys_rmdir+0x49/0x50 fs/namei.c:4235 x64_sys_call+0x25f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:85 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888114311800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 272 bytes inside of 1024-byte region [ffff888114311800, ffff888114311c00) The buggy address belongs to the page: page:ffffea000450c400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x114310 head:ffffea000450c400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 299, ts 32103776247, free_ts 32061686295 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4954 kmalloc_reserve net/core/skbuff.c:357 [inline] __alloc_skb+0x210/0x730 net/core/skbuff.c:428 alloc_skb_fclone include/linux/skbuff.h:1233 [inline] sk_stream_alloc_skb+0x216/0xb70 net/ipv4/tcp.c:892 tcp_sendmsg_locked+0xcbb/0x3330 net/ipv4/tcp.c:1317 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1460 inet_sendmsg+0xa5/0xc0 net/ipv4/af_inet.c:830 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] sock_write_iter+0x2a6/0x3a0 net/socket.c:1080 call_write_iter include/linux/fs.h:2212 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x831/0xfd0 fs/read_write.c:594 ksys_write+0x14a/0x260 fs/read_write.c:647 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page+0xae/0x540 mm/page_alloc.c:3618 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5900 __free_slab+0xe5/0x1e0 mm/slub.c:2025 free_slab mm/slub.c:2040 [inline] discard_slab mm/slub.c:2046 [inline] __unfreeze_partials+0x15a/0x190 mm/slub.c:2532 put_cpu_partial+0xc6/0x120 mm/slub.c:2612 __slab_free+0x1d4/0x290 mm/slub.c:3395 do_slab_free mm/slub.c:3514 [inline] ___cache_free+0x104/0x120 mm/slub.c:3535 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3245 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc+0x120/0x2c0 mm/slub.c:4432 __kmalloc_node include/linux/slab.h:487 [inline] kmalloc_node include/linux/slab.h:642 [inline] kzalloc_node include/linux/slab.h:761 [inline] qdisc_alloc+0x79/0x7b0 net/sched/sch_generic.c:891 qdisc_create_dflt+0x6b/0x390 net/sched/sch_generic.c:953 Memory state around the buggy address: ffff888114311800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888114311880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888114311900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888114311980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888114311a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ------------[ cut here ]------------ WARNING: CPU: 1 PID: 398 at drivers/usb/gadget/function/u_serial.c:686 gs_close+0x17d/0x9b0 drivers/usb/gadget/function/u_serial.c:686 Modules linked in: CPU: 1 PID: 398 Comm: syz.0.17 Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:gs_close+0x17d/0x9b0 drivers/usb/gadget/function/u_serial.c:686 Code: 88 3e fe 41 ff cc 42 0f b6 04 2b 84 c0 0f 85 c6 06 00 00 48 8b 44 24 20 44 89 20 48 8b 5c 24 38 e9 c2 02 00 00 e8 d3 88 3e fe <0f> 0b 48 8b 5c 24 38 e9 b1 02 00 00 e8 c2 88 3e fe 49 8d bf 90 02 RSP: 0018:ffffc90000c67be0 EFLAGS: 00010093 RAX: ffffffff832b2e0d RBX: 1ffff1102286231a RCX: ffff88811bfc4f00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000c67ce8 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff5200018cf6c R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff9200018cf84 R15: ffff888114311800 FS: 0000555592779500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8b424ec7c0 CR3: 0000000130775000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tty_release+0x3c8/0x1330 drivers/tty/tty_io.c:1773 __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:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb1e79720d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1d55fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb1e7bfbda0 RCX: 00007fb1e79720d9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb1e7bfbda0 R08: 00007fb1e7bfa038 R09: 0000000000000000 R10: 000000000003fda0 R11: 0000000000000246 R12: 000000000000809e R13: 00007fb1e7bf9fac R14: 0000000000007da1 R15: 00007ffe1d55ff70 ---[ end trace e145c3d78bf37ce4 ]--- general protection fault, probably for non-canonical address 0xfa4bfc2900000020: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xd260014800000100-0xd260014800000107] CPU: 0 PID: 398 Comm: syz.0.17 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:get_work_pool kernel/workqueue.c:745 [inline] RIP: 0010:try_to_grab_pending+0x1be/0x580 kernel/workqueue.c:1303 Code: 00 e8 b6 f5 25 00 e9 0a 01 00 00 e8 ac f5 25 00 31 c0 e9 98 01 00 00 e8 a0 f5 25 00 49 81 e6 00 ff ff ff 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 f4 64 65 00 49 8b 06 48 85 c0 0f 84 RSP: 0018:ffffc90000c67a80 EFLAGS: 00010802 RAX: 1a4c002900000020 RBX: dffffc0000000000 RCX: ffff88811bfc4f00 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000 RBP: ffffc90000c67b30 R08: 0000000000000007 R09: 00000000fffffffb R10: dffffc0000000000 R11: ffffed1022862301 R12: ffff888114311808 R13: ffffc90000c67b58 R14: d260014800000100 R15: 1ffff9200018cf6b FS: 0000555592779500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b34863fff CR3: 0000000130775000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __cancel_work_timer+0xb5/0x4d0 kernel/workqueue.c:3158 cancel_work_sync+0x17/0x20 kernel/workqueue.c:3235 tty_buffer_cancel_work+0x19/0x20 drivers/tty/tty_buffer.c:650 release_tty+0x47d/0x840 drivers/tty/tty_io.c:1615 tty_release_struct+0xbf/0xe0 drivers/tty/tty_io.c:1719 tty_release+0xc87/0x1330 drivers/tty/tty_io.c:1880 __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:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb1e79720d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1d55fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb1e7bfbda0 RCX: 00007fb1e79720d9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb1e7bfbda0 R08: 00007fb1e7bfa038 R09: 0000000000000000 R10: 000000000003fda0 R11: 0000000000000246 R12: 000000000000809e R13: 00007fb1e7bf9fac R14: 0000000000007da1 R15: 00007ffe1d55ff70 Modules linked in: ---[ end trace e145c3d78bf37ce5 ]--- RIP: 0010:get_work_pool kernel/workqueue.c:745 [inline] RIP: 0010:try_to_grab_pending+0x1be/0x580 kernel/workqueue.c:1303 Code: 00 e8 b6 f5 25 00 e9 0a 01 00 00 e8 ac f5 25 00 31 c0 e9 98 01 00 00 e8 a0 f5 25 00 49 81 e6 00 ff ff ff 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 f4 64 65 00 49 8b 06 48 85 c0 0f 84 RSP: 0018:ffffc90000c67a80 EFLAGS: 00010802 RAX: 1a4c002900000020 RBX: dffffc0000000000 RCX: ffff88811bfc4f00 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000 RBP: ffffc90000c67b30 R08: 0000000000000007 R09: 00000000fffffffb R10: dffffc0000000000 R11: ffffed1022862301 R12: ffff888114311808 R13: ffffc90000c67b58 R14: d260014800000100 R15: 1ffff9200018cf6b FS: 0000555592779500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b34863fff CR3: 0000000130775000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 e8 add %ch,%al 2: b6 f5 mov $0xf5,%dh 4: 25 00 e9 0a 01 and $0x10ae900,%eax 9: 00 00 add %al,(%rax) b: e8 ac f5 25 00 call 0x25f5bc 10: 31 c0 xor %eax,%eax 12: e9 98 01 00 00 jmp 0x1af 17: e8 a0 f5 25 00 call 0x25f5bc 1c: 49 81 e6 00 ff ff ff and $0xffffffffffffff00,%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 f7 mov %r14,%rdi 33: e8 f4 64 65 00 call 0x65652c 38: 49 8b 06 mov (%r14),%rax 3b: 48 85 c0 test %rax,%rax 3e: 0f .byte 0xf 3f: 84 .byte 0x84 final repro crashed as (corrupted=false): ================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: use-after-free in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] BUG: KASAN: use-after-free in tty_port_kopened include/linux/tty_port.h:180 [inline] BUG: KASAN: use-after-free in check_tty_count+0x1a8/0x330 drivers/tty/tty_io.c:294 Read of size 8 at addr ffff888114311910 by task syz.0.17/398 CPU: 1 PID: 398 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x10f/0x150 mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189 __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31 instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] tty_port_kopened include/linux/tty_port.h:180 [inline] check_tty_count+0x1a8/0x330 drivers/tty/tty_io.c:294 tty_release+0xc9/0x1330 drivers/tty/tty_io.c:1756 __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:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb1e79720d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1d55fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb1e7bfbda0 RCX: 00007fb1e79720d9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb1e7bfbda0 R08: 00007fb1e7bfa038 R09: 0000000000000000 R10: 000000000003fda0 R11: 0000000000000246 R12: 000000000000809e R13: 00007fb1e7bf9fac R14: 0000000000007da1 R15: 00007ffe1d55ff70 Allocated by task 399: 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] gs_port_alloc drivers/usb/gadget/function/u_serial.c:1158 [inline] gserial_alloc_line_no_console+0x238/0x700 drivers/usb/gadget/function/u_serial.c:1238 gserial_alloc_line+0x15/0x20 drivers/usb/gadget/function/u_serial.c:1272 acm_alloc_instance+0x86/0xe0 drivers/usb/gadget/function/f_acm.c:845 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline] usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:642 configfs_mkdir+0x50a/0x9c0 fs/configfs/dir.c:1329 vfs_mkdir+0x38b/0x590 fs/namei.c:4073 do_mkdirat+0x174/0x4d0 fs/namei.c:4098 __do_sys_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4111 x64_sys_call+0x37e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 399: 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 gserial_free_port+0x245/0x2e0 drivers/usb/gadget/function/u_serial.c:1202 gserial_free_line+0x9b/0x1a0 drivers/usb/gadget/function/u_serial.c:1219 acm_free_instance+0x39/0x60 drivers/usb/gadget/function/f_acm.c:832 usb_put_function_instance+0x85/0xa0 drivers/usb/gadget/functions.c:77 acm_attr_release+0x15/0x20 drivers/usb/gadget/function/f_acm.c:781 config_item_cleanup fs/configfs/item.c:128 [inline] config_item_release fs/configfs/item.c:137 [inline] kref_put include/linux/kref.h:65 [inline] config_item_put+0x158/0x210 fs/configfs/item.c:149 configfs_rmdir+0x89f/0x960 fs/configfs/dir.c:1540 vfs_rmdir+0x1ae/0x450 fs/namei.c:4157 do_rmdir+0x261/0x6b0 fs/namei.c:4218 __do_sys_rmdir fs/namei.c:4237 [inline] __se_sys_rmdir fs/namei.c:4235 [inline] __x64_sys_rmdir+0x49/0x50 fs/namei.c:4235 x64_sys_call+0x25f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:85 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888114311800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 272 bytes inside of 1024-byte region [ffff888114311800, ffff888114311c00) The buggy address belongs to the page: page:ffffea000450c400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x114310 head:ffffea000450c400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 299, ts 32103776247, free_ts 32061686295 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4954 kmalloc_reserve net/core/skbuff.c:357 [inline] __alloc_skb+0x210/0x730 net/core/skbuff.c:428 alloc_skb_fclone include/linux/skbuff.h:1233 [inline] sk_stream_alloc_skb+0x216/0xb70 net/ipv4/tcp.c:892 tcp_sendmsg_locked+0xcbb/0x3330 net/ipv4/tcp.c:1317 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1460 inet_sendmsg+0xa5/0xc0 net/ipv4/af_inet.c:830 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] sock_write_iter+0x2a6/0x3a0 net/socket.c:1080 call_write_iter include/linux/fs.h:2212 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x831/0xfd0 fs/read_write.c:594 ksys_write+0x14a/0x260 fs/read_write.c:647 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page+0xae/0x540 mm/page_alloc.c:3618 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5900 __free_slab+0xe5/0x1e0 mm/slub.c:2025 free_slab mm/slub.c:2040 [inline] discard_slab mm/slub.c:2046 [inline] __unfreeze_partials+0x15a/0x190 mm/slub.c:2532 put_cpu_partial+0xc6/0x120 mm/slub.c:2612 __slab_free+0x1d4/0x290 mm/slub.c:3395 do_slab_free mm/slub.c:3514 [inline] ___cache_free+0x104/0x120 mm/slub.c:3535 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3245 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc+0x120/0x2c0 mm/slub.c:4432 __kmalloc_node include/linux/slab.h:487 [inline] kmalloc_node include/linux/slab.h:642 [inline] kzalloc_node include/linux/slab.h:761 [inline] qdisc_alloc+0x79/0x7b0 net/sched/sch_generic.c:891 qdisc_create_dflt+0x6b/0x390 net/sched/sch_generic.c:953 Memory state around the buggy address: ffff888114311800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888114311880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888114311900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888114311980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888114311a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ------------[ cut here ]------------ WARNING: CPU: 1 PID: 398 at drivers/usb/gadget/function/u_serial.c:686 gs_close+0x17d/0x9b0 drivers/usb/gadget/function/u_serial.c:686 Modules linked in: CPU: 1 PID: 398 Comm: syz.0.17 Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:gs_close+0x17d/0x9b0 drivers/usb/gadget/function/u_serial.c:686 Code: 88 3e fe 41 ff cc 42 0f b6 04 2b 84 c0 0f 85 c6 06 00 00 48 8b 44 24 20 44 89 20 48 8b 5c 24 38 e9 c2 02 00 00 e8 d3 88 3e fe <0f> 0b 48 8b 5c 24 38 e9 b1 02 00 00 e8 c2 88 3e fe 49 8d bf 90 02 RSP: 0018:ffffc90000c67be0 EFLAGS: 00010093 RAX: ffffffff832b2e0d RBX: 1ffff1102286231a RCX: ffff88811bfc4f00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000c67ce8 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff5200018cf6c R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff9200018cf84 R15: ffff888114311800 FS: 0000555592779500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8b424ec7c0 CR3: 0000000130775000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tty_release+0x3c8/0x1330 drivers/tty/tty_io.c:1773 __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:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb1e79720d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1d55fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb1e7bfbda0 RCX: 00007fb1e79720d9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb1e7bfbda0 R08: 00007fb1e7bfa038 R09: 0000000000000000 R10: 000000000003fda0 R11: 0000000000000246 R12: 000000000000809e R13: 00007fb1e7bf9fac R14: 0000000000007da1 R15: 00007ffe1d55ff70 ---[ end trace e145c3d78bf37ce4 ]--- general protection fault, probably for non-canonical address 0xfa4bfc2900000020: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xd260014800000100-0xd260014800000107] CPU: 0 PID: 398 Comm: syz.0.17 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:get_work_pool kernel/workqueue.c:745 [inline] RIP: 0010:try_to_grab_pending+0x1be/0x580 kernel/workqueue.c:1303 Code: 00 e8 b6 f5 25 00 e9 0a 01 00 00 e8 ac f5 25 00 31 c0 e9 98 01 00 00 e8 a0 f5 25 00 49 81 e6 00 ff ff ff 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 f4 64 65 00 49 8b 06 48 85 c0 0f 84 RSP: 0018:ffffc90000c67a80 EFLAGS: 00010802 RAX: 1a4c002900000020 RBX: dffffc0000000000 RCX: ffff88811bfc4f00 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000 RBP: ffffc90000c67b30 R08: 0000000000000007 R09: 00000000fffffffb R10: dffffc0000000000 R11: ffffed1022862301 R12: ffff888114311808 R13: ffffc90000c67b58 R14: d260014800000100 R15: 1ffff9200018cf6b FS: 0000555592779500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b34863fff CR3: 0000000130775000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __cancel_work_timer+0xb5/0x4d0 kernel/workqueue.c:3158 cancel_work_sync+0x17/0x20 kernel/workqueue.c:3235 tty_buffer_cancel_work+0x19/0x20 drivers/tty/tty_buffer.c:650 release_tty+0x47d/0x840 drivers/tty/tty_io.c:1615 tty_release_struct+0xbf/0xe0 drivers/tty/tty_io.c:1719 tty_release+0xc87/0x1330 drivers/tty/tty_io.c:1880 __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:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb1e79720d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1d55fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb1e7bfbda0 RCX: 00007fb1e79720d9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb1e7bfbda0 R08: 00007fb1e7bfa038 R09: 0000000000000000 R10: 000000000003fda0 R11: 0000000000000246 R12: 000000000000809e R13: 00007fb1e7bf9fac R14: 0000000000007da1 R15: 00007ffe1d55ff70 Modules linked in: ---[ end trace e145c3d78bf37ce5 ]--- RIP: 0010:get_work_pool kernel/workqueue.c:745 [inline] RIP: 0010:try_to_grab_pending+0x1be/0x580 kernel/workqueue.c:1303 Code: 00 e8 b6 f5 25 00 e9 0a 01 00 00 e8 ac f5 25 00 31 c0 e9 98 01 00 00 e8 a0 f5 25 00 49 81 e6 00 ff ff ff 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 f4 64 65 00 49 8b 06 48 85 c0 0f 84 RSP: 0018:ffffc90000c67a80 EFLAGS: 00010802 RAX: 1a4c002900000020 RBX: dffffc0000000000 RCX: ffff88811bfc4f00 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000 RBP: ffffc90000c67b30 R08: 0000000000000007 R09: 00000000fffffffb R10: dffffc0000000000 R11: ffffed1022862301 R12: ffff888114311808 R13: ffffc90000c67b58 R14: d260014800000100 R15: 1ffff9200018cf6b FS: 0000555592779500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b34863fff CR3: 0000000130775000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 e8 add %ch,%al 2: b6 f5 mov $0xf5,%dh 4: 25 00 e9 0a 01 and $0x10ae900,%eax 9: 00 00 add %al,(%rax) b: e8 ac f5 25 00 call 0x25f5bc 10: 31 c0 xor %eax,%eax 12: e9 98 01 00 00 jmp 0x1af 17: e8 a0 f5 25 00 call 0x25f5bc 1c: 49 81 e6 00 ff ff ff and $0xffffffffffffff00,%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 f7 mov %r14,%rdi 33: e8 f4 64 65 00 call 0x65652c 38: 49 8b 06 mov (%r14),%rax 3b: 48 85 c0 test %rax,%rax 3e: 0f .byte 0xf 3f: 84 .byte 0x84