Extracting prog: 1m6.132625471s
Minimizing prog: 18m47.780706122s
Simplifying prog options: 0s
Extracting C: 27.992905553s
Simplifying C: 5m16.452120901s


extracting reproducer from 30 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-mkdirat-mount-mkdirat-mkdirat-openat-write$uinput_user_dev-ppoll-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
write$uinput_user_dev(0xffffffffffffffff, &(0x7f0000000400)={'syz0\x00', {0x3, 0x2, 0x6, 0xfff7}, 0x3a, [0x8000, 0xc95a, 0xf, 0x8, 0x80, 0x2, 0x3, 0x80, 0x20000006, 0x4d, 0x6, 0x5f, 0x9, 0x5, 0xffff2d37, 0xff7fff01, 0x6, 0x3, 0x7, 0x5, 0x4, 0x0, 0x7, 0x3c5b, 0x1, 0x24, 0xd, 0x1, 0x0, 0xffffffff, 0xe661, 0x4, 0x7, 0x3, 0x8, 0x4c75, 0x10000, 0x242, 0x3, 0xe, 0x0, 0x80008071, 0x7, 0x17, 0x1, 0x7, 0x5, 0x5, 0x8e, 0x7, 0x6, 0x0, 0x5, 0x4, 0x30a429b, 0x3ff, 0x80, 0x0, 0x5, 0x6, 0x8, 0x4, 0x0, 0x40], [0x10000007, 0x100009, 0x8000012f, 0x8004, 0x5, 0xfffffff3, 0x129432e6, 0xc8, 0xf9, 0xe, 0x2bf, 0x6c7, 0x9, 0xfffffffc, 0x3, 0x0, 0x0, 0x5, 0x2f, 0xe, 0x312, 0x78, 0xea4, 0x7fff, 0x4, 0x7, 0x7fff, 0x6, 0x400, 0x401, 0x3, 0x1, 0xff, 0x5, 0x1000005, 0x5f31, 0xd, 0x4e0, 0x8, 0x4, 0xb, 0x4, 0x9, 0x5, 0x9, 0x6, 0x47, 0xff12, 0x1, 0xfe000000, 0xffff, 0x2, 0x4, 0x9, 0x3, 0x3, 0x9, 0x1, 0x3, 0x3, 0xbc45, 0x48c93690, 0x42, 0xe], [0x7, 0x40b, 0x4, 0x5, 0xfffffffe, 0x100, 0x4, 0x9, 0x5, 0x7fff, 0x0, 0x7, 0xb, 0x4, 0x5, 0x5, 0x0, 0x1ef, 0x5, 0x8, 0x86, 0x3, 0xa, 0x3e7, 0xb, 0x5, 0x2, 0x2, 0x1, 0x2000000b, 0x4, 0x6d01, 0x6, 0x38, 0x800003, 0x200, 0x80, 0xffffffff, 0x4, 0x2950bfaf, 0x1000, 0xa2, 0x7, 0xa9, 0x5, 0x6, 0xac8, 0xbf, 0x2, 0x3, 0x7ff, 0x12b, 0x4, 0x1, 0xa, 0x0, 0x5, 0x1c, 0x120000, 0x5, 0x2006, 0x80a2ed, 0x4, 0x25], [0x80000009, 0xbb33, 0x7, 0xb, 0x5, 0x938, 0x6, 0x6, 0x0, 0xb9, 0xce4, 0x1ff, 0x2, 0x57, 0x5, 0x3, 0x101, 0x4, 0x4, 0x3, 0xffff, 0xa620, 0x1, 0x5, 0x1, 0x3, 0x14c, 0x60a7, 0x4, 0x16, 0xffffffff, 0x80000000, 0x5, 0x4, 0xc8, 0x1, 0xfffff000, 0x10000, 0x3, 0x7e, 0x100, 0x9622, 0x7, 0xaf, 0x8, 0x6, 0x226, 0x5, 0x5, 0x0, 0x30b1d693, 0xa1f, 0xf40, 0x7, 0x1, 0x6c1b, 0x0, 0x4, 0xffffff80, 0xb1e, 0xd7, 0x200, 0xffff3441, 0xfff]}, 0x45c)
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in check_tty_count
single: successfully extracted reproducer
found reproducer with 14 syscalls
minimizing guilty program
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-mkdirat-mount-mkdirat-mkdirat-openat-write$uinput_user_dev-ppoll
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
write$uinput_user_dev(0xffffffffffffffff, &(0x7f0000000400)={'syz0\x00', {0x3, 0x2, 0x6, 0xfff7}, 0x3a, [0x8000, 0xc95a, 0xf, 0x8, 0x80, 0x2, 0x3, 0x80, 0x20000006, 0x4d, 0x6, 0x5f, 0x9, 0x5, 0xffff2d37, 0xff7fff01, 0x6, 0x3, 0x7, 0x5, 0x4, 0x0, 0x7, 0x3c5b, 0x1, 0x24, 0xd, 0x1, 0x0, 0xffffffff, 0xe661, 0x4, 0x7, 0x3, 0x8, 0x4c75, 0x10000, 0x242, 0x3, 0xe, 0x0, 0x80008071, 0x7, 0x17, 0x1, 0x7, 0x5, 0x5, 0x8e, 0x7, 0x6, 0x0, 0x5, 0x4, 0x30a429b, 0x3ff, 0x80, 0x0, 0x5, 0x6, 0x8, 0x4, 0x0, 0x40], [0x10000007, 0x100009, 0x8000012f, 0x8004, 0x5, 0xfffffff3, 0x129432e6, 0xc8, 0xf9, 0xe, 0x2bf, 0x6c7, 0x9, 0xfffffffc, 0x3, 0x0, 0x0, 0x5, 0x2f, 0xe, 0x312, 0x78, 0xea4, 0x7fff, 0x4, 0x7, 0x7fff, 0x6, 0x400, 0x401, 0x3, 0x1, 0xff, 0x5, 0x1000005, 0x5f31, 0xd, 0x4e0, 0x8, 0x4, 0xb, 0x4, 0x9, 0x5, 0x9, 0x6, 0x47, 0xff12, 0x1, 0xfe000000, 0xffff, 0x2, 0x4, 0x9, 0x3, 0x3, 0x9, 0x1, 0x3, 0x3, 0xbc45, 0x48c93690, 0x42, 0xe], [0x7, 0x40b, 0x4, 0x5, 0xfffffffe, 0x100, 0x4, 0x9, 0x5, 0x7fff, 0x0, 0x7, 0xb, 0x4, 0x5, 0x5, 0x0, 0x1ef, 0x5, 0x8, 0x86, 0x3, 0xa, 0x3e7, 0xb, 0x5, 0x2, 0x2, 0x1, 0x2000000b, 0x4, 0x6d01, 0x6, 0x38, 0x800003, 0x200, 0x80, 0xffffffff, 0x4, 0x2950bfaf, 0x1000, 0xa2, 0x7, 0xa9, 0x5, 0x6, 0xac8, 0xbf, 0x2, 0x3, 0x7ff, 0x12b, 0x4, 0x1, 0xa, 0x0, 0x5, 0x1c, 0x120000, 0x5, 0x2006, 0x80a2ed, 0x4, 0x25], [0x80000009, 0xbb33, 0x7, 0xb, 0x5, 0x938, 0x6, 0x6, 0x0, 0xb9, 0xce4, 0x1ff, 0x2, 0x57, 0x5, 0x3, 0x101, 0x4, 0x4, 0x3, 0xffff, 0xa620, 0x1, 0x5, 0x1, 0x3, 0x14c, 0x60a7, 0x4, 0x16, 0xffffffff, 0x80000000, 0x5, 0x4, 0xc8, 0x1, 0xfffff000, 0x10000, 0x3, 0x7e, 0x100, 0x9622, 0x7, 0xaf, 0x8, 0x6, 0x226, 0x5, 0x5, 0x0, 0x30b1d693, 0xa1f, 0xf40, 0x7, 0x1, 0x6c1b, 0x0, 0x4, 0xffffff80, 0xb1e, 0xd7, 0x200, 0xffff3441, 0xfff]}, 0x45c)
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-mkdirat-mount-mkdirat-mkdirat-openat-write$uinput_user_dev-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
write$uinput_user_dev(0xffffffffffffffff, &(0x7f0000000400)={'syz0\x00', {0x3, 0x2, 0x6, 0xfff7}, 0x3a, [0x8000, 0xc95a, 0xf, 0x8, 0x80, 0x2, 0x3, 0x80, 0x20000006, 0x4d, 0x6, 0x5f, 0x9, 0x5, 0xffff2d37, 0xff7fff01, 0x6, 0x3, 0x7, 0x5, 0x4, 0x0, 0x7, 0x3c5b, 0x1, 0x24, 0xd, 0x1, 0x0, 0xffffffff, 0xe661, 0x4, 0x7, 0x3, 0x8, 0x4c75, 0x10000, 0x242, 0x3, 0xe, 0x0, 0x80008071, 0x7, 0x17, 0x1, 0x7, 0x5, 0x5, 0x8e, 0x7, 0x6, 0x0, 0x5, 0x4, 0x30a429b, 0x3ff, 0x80, 0x0, 0x5, 0x6, 0x8, 0x4, 0x0, 0x40], [0x10000007, 0x100009, 0x8000012f, 0x8004, 0x5, 0xfffffff3, 0x129432e6, 0xc8, 0xf9, 0xe, 0x2bf, 0x6c7, 0x9, 0xfffffffc, 0x3, 0x0, 0x0, 0x5, 0x2f, 0xe, 0x312, 0x78, 0xea4, 0x7fff, 0x4, 0x7, 0x7fff, 0x6, 0x400, 0x401, 0x3, 0x1, 0xff, 0x5, 0x1000005, 0x5f31, 0xd, 0x4e0, 0x8, 0x4, 0xb, 0x4, 0x9, 0x5, 0x9, 0x6, 0x47, 0xff12, 0x1, 0xfe000000, 0xffff, 0x2, 0x4, 0x9, 0x3, 0x3, 0x9, 0x1, 0x3, 0x3, 0xbc45, 0x48c93690, 0x42, 0xe], [0x7, 0x40b, 0x4, 0x5, 0xfffffffe, 0x100, 0x4, 0x9, 0x5, 0x7fff, 0x0, 0x7, 0xb, 0x4, 0x5, 0x5, 0x0, 0x1ef, 0x5, 0x8, 0x86, 0x3, 0xa, 0x3e7, 0xb, 0x5, 0x2, 0x2, 0x1, 0x2000000b, 0x4, 0x6d01, 0x6, 0x38, 0x800003, 0x200, 0x80, 0xffffffff, 0x4, 0x2950bfaf, 0x1000, 0xa2, 0x7, 0xa9, 0x5, 0x6, 0xac8, 0xbf, 0x2, 0x3, 0x7ff, 0x12b, 0x4, 0x1, 0xa, 0x0, 0x5, 0x1c, 0x120000, 0x5, 0x2006, 0x80a2ed, 0x4, 0x25], [0x80000009, 0xbb33, 0x7, 0xb, 0x5, 0x938, 0x6, 0x6, 0x0, 0xb9, 0xce4, 0x1ff, 0x2, 0x57, 0x5, 0x3, 0x101, 0x4, 0x4, 0x3, 0xffff, 0xa620, 0x1, 0x5, 0x1, 0x3, 0x14c, 0x60a7, 0x4, 0x16, 0xffffffff, 0x80000000, 0x5, 0x4, 0xc8, 0x1, 0xfffff000, 0x10000, 0x3, 0x7e, 0x100, 0x9622, 0x7, 0xaf, 0x8, 0x6, 0x226, 0x5, 0x5, 0x0, 0x30b1d693, 0xa1f, 0xf40, 0x7, 0x1, 0x6c1b, 0x0, 0x4, 0xffffff80, 0xb1e, 0xd7, 0x200, 0xffff3441, 0xfff]}, 0x45c)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in check_tty_count
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-mkdirat-mount-mkdirat-mkdirat-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./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(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in check_tty_count
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-mkdirat-mount-mkdirat-mkdirat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./config/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./config/usb_gadget/g1/functions/acm.usb0\x00', 0x1ff)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-mkdirat-mount-mkdirat-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./config/usb_gadget/g1\x00', 0x1ff)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in check_tty_count
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
mount(0x0, &(0x7f0000000040)='./config\x00', &(0x7f0000000080)='configfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in tty_open
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-mkdirat-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in check_tty_count
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in check_tty_count
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', 0x0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', 0x0, 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program did not crash
testing program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=33.118215474s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
program crashed: KASAN: use-after-free Read in check_tty_count
simplifying C reproducer
testing compiled C program (duration=33.118215474s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
program did not crash
testing compiled C program (duration=33.118215474s, {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-mkdirat-mkdirat-mkdirat-mount-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=33.118215474s, {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-mkdirat-mkdirat-mkdirat-mount-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=33.118215474s, {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-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
program crashed: KASAN: use-after-free Read in tty_open
testing compiled C program (duration=33.118215474s, {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:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
program crashed: KASAN: use-after-free Read in tty_open
testing compiled C program (duration=33.118215474s, {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:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
program crashed: KASAN: use-after-free Read in check_tty_count
testing compiled C program (duration=33.118215474s, {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:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
program crashed: KASAN: use-after-free Read in check_tty_count
testing program (duration=33.118215474s, {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:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in tty_open
validation run: crashed=true
testing program (duration=33.118215474s, {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:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in check_tty_count
validation run: crashed=true
testing program (duration=33.118215474s, {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:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mkdirat-mkdirat-mount-openat-rmdir
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./my_configfs\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./my_configfs/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000000a0)='./dev\x00', 0x1ff)
mount(0x0, &(0x7f00000000a0)='./dev\x00', &(0x7f00000000c0)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000800)='./dev/ttyGS0\x00', 0x2, 0x0)
rmdir(&(0x7f0000000440)='./my_configfs/usb_gadget/g1/functions/obex.usb1\x00')

program crashed: KASAN: use-after-free Read in check_tty_count
validation run: crashed=true
reproducing took 28m40.153275419s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:72 [inline]
BUG: KASAN: use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: use-after-free in tty_port_kopened include/linux/tty_port.h:228 [inline]
BUG: KASAN: use-after-free in check_tty_count+0x1a8/0x330 drivers/tty/tty_io.c:287
Read of size 8 at addr ffff888118a93110 by task syz.0.17/399

CPU: 1 PID: 399 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 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:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 tty_port_kopened include/linux/tty_port.h:228 [inline]
 check_tty_count+0x1a8/0x330 drivers/tty/tty_io.c:287
 tty_release+0x88/0x11d0 drivers/tty/tty_io.c:1736
 __fput+0x1fd/0x8f0 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5e2a59e0d9
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:00007ffc4e5b6568 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f5e2a827da0 RCX: 00007f5e2a59e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5e2a827da0 R08: 00007f5e2a826038 R09: 0000000000000000
R10: 000000000003fda0 R11: 0000000000000246 R12: 0000000000007542
R13: 00007f5e2a825fac R14: 0000000000007237 R15: 00007ffc4e5b6670
 </TASK>

Allocated by task 400:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:380 [inline]
 __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 kmalloc_trace+0x40/0xb0 mm/slab_common.c:1033
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 gs_port_alloc drivers/usb/gadget/function/u_serial.c:1166 [inline]
 gserial_alloc_line_no_console+0x238/0x700 drivers/usb/gadget/function/u_serial.c:1246
 obex_alloc_inst+0x86/0xe0 drivers/usb/gadget/function/f_obex.c:435
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xf3/0x310 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x360 drivers/usb/gadget/configfs.c:652
 configfs_mkdir+0x518/0x9e0 fs/configfs/dir.c:1329
 vfs_mkdir+0x39c/0x580 fs/namei.c:4113
 do_mkdirat+0x174/0x4d0 fs/namei.c:4138
 __do_sys_mkdirat fs/namei.c:4153 [inline]
 __se_sys_mkdirat fs/namei.c:4151 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4151
 x64_sys_call+0x73d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 400:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x132/0x180 mm/kasan/common.c:242
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:250
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1750 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1776
 slab_free mm/slub.c:3712 [inline]
 __kmem_cache_free+0xb7/0x1b0 mm/slub.c:3728
 kfree+0x6f/0xf0 mm/slab_common.c:990
 gserial_free_port+0x240/0x2d0 drivers/usb/gadget/function/u_serial.c:1210
 gserial_free_line+0x9b/0x1a0 drivers/usb/gadget/function/u_serial.c:1227
 obex_free_inst+0x39/0x60 drivers/usb/gadget/function/f_obex.c:421
 usb_put_function_instance+0x9b/0xc0 drivers/usb/gadget/functions.c:77
 obex_attr_release+0x15/0x20 drivers/usb/gadget/function/f_obex.c:391
 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+0x166/0x210 fs/configfs/item.c:149
 configfs_rmdir+0x8c9/0x980 fs/configfs/dir.c:1540
 vfs_rmdir+0x381/0x4f0 fs/namei.c:4198
 do_rmdir+0x261/0x6b0 fs/namei.c:4259
 __do_sys_rmdir fs/namei.c:4278 [inline]
 __se_sys_rmdir fs/namei.c:4276 [inline]
 __x64_sys_rmdir+0x49/0x50 fs/namei.c:4276
 x64_sys_call+0x68e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:85
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888118a93000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
 1024-byte region [ffff888118a93000, ffff888118a93400)

The buggy address belongs to the physical page:
page:ffffea000462a400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118a90
head:ffffea000462a400 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 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 344, tgid 344 (kworker/u4:3), ts 29176600274, free_ts 29111180650
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4586
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5930
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3e0 mm/slub.c:2020
 ___slab_alloc+0x70f/0xb70 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x204/0x2d0 mm/slub.c:3423
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node_track_caller+0xa1/0x1e0 mm/slab_common.c:958
 kmalloc_reserve net/core/skbuff.c:449 [inline]
 __alloc_skb+0x226/0x4a0 net/core/skbuff.c:518
 alloc_skb include/linux/skbuff.h:1322 [inline]
 nlmsg_new include/net/netlink.h:987 [inline]
 inet6_rt_notify+0x34d/0x520 net/ipv6/route.c:6218
 fib6_add_rt2node net/ipv6/ip6_fib.c:1261 [inline]
 fib6_add+0x2254/0x3dd0 net/ipv6/ip6_fib.c:1490
 __ip6_ins_rt net/ipv6/route.c:1343 [inline]
 ip6_route_add+0x89/0x130 net/ipv6/route.c:3896
 addrconf_prefix_route net/ipv6/addrconf.c:2466 [inline]
 addrconf_add_linklocal+0x3d2/0x660 net/ipv6/addrconf.c:3285
 addrconf_addr_gen+0x542/0x690 net/ipv6/addrconf.c:3414
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1580 [inline]
 free_pcp_prepare mm/page_alloc.c:1654 [inline]
 free_unref_page_prepare+0x80c/0x820 mm/page_alloc.c:3621
 free_unref_page+0x93/0x530 mm/page_alloc.c:3719
 free_the_page mm/page_alloc.c:863 [inline]
 __free_pages+0x67/0x100 mm/page_alloc.c:6020
 __free_slab+0xc7/0x1a0 mm/slub.c:2044
 free_slab mm/slub.c:2059 [inline]
 discard_slab mm/slub.c:2065 [inline]
 __unfreeze_partials+0x15a/0x190 mm/slub.c:2614
 put_cpu_partial+0xa9/0x100 mm/slub.c:2690
 __slab_free+0x1c4/0x280 mm/slub.c:3589
 do_slab_free mm/slub.c:3666 [inline]
 ___cache_free+0xbf/0xd0 mm/slub.c:3722
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0xc6/0x140 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:311
 kasan_slab_alloc include/linux/kasan.h:202 [inline]
 slab_post_alloc_hook+0x4f/0x2d0 mm/slab.h:768
 slab_alloc_node mm/slub.c:3382 [inline]
 kmem_cache_alloc_node+0x179/0x330 mm/slub.c:3429
 __alloc_skb+0xe8/0x4a0 net/core/skbuff.c:508
 alloc_skb include/linux/skbuff.h:1322 [inline]
 alloc_skb_with_frags+0xa8/0x620 net/core/skbuff.c:6176
 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2761

Memory state around the buggy address:
 ffff888118a93000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888118a93080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888118a93100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff888118a93180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888118a93200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
WARNING: CPU: 0 PID: 399 at drivers/usb/gadget/function/u_serial.c:694 gs_close+0x17d/0x9b0 drivers/usb/gadget/function/u_serial.c:694
Modules linked in:
CPU: 0 PID: 399 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:694
Code: 74 23 fe 41 ff cc 42 0f b6 04 2b 84 c0 0f 85 cf 06 00 00 48 8b 44 24 20 44 89 20 48 8b 5c 24 38 e9 cb 02 00 00 e8 93 74 23 fe <0f> 0b 48 8b 5c 24 38 e9 ba 02 00 00 e8 82 74 23 fe 49 8d bf a8 02
RSP: 0018:ffffc90000a97b60 EFLAGS: 00010093
RAX: ffffffff834df1ad RBX: 1ffff1102315261a RCX: ffff888119399440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a97c80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000152f5c R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff92000152f74 R15: ffff888118a93000
FS:  000055555d5b7500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a78e99ff8 CR3: 0000000130894000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tty_release+0x32b/0x11d0 drivers/tty/tty_io.c:1753
 __fput+0x1fd/0x8f0 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5e2a59e0d9
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:00007ffc4e5b6568 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f5e2a827da0 RCX: 00007f5e2a59e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5e2a827da0 R08: 00007f5e2a826038 R09: 0000000000000000
R10: 000000000003fda0 R11: 0000000000000246 R12: 0000000000007542
R13: 00007f5e2a825fac R14: 0000000000007237 R15: 00007ffc4e5b6670
 </TASK>
---[ end trace 0000000000000000 ]---

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:72 [inline]
BUG: KASAN: use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: use-after-free in tty_port_kopened include/linux/tty_port.h:228 [inline]
BUG: KASAN: use-after-free in check_tty_count+0x1a8/0x330 drivers/tty/tty_io.c:287
Read of size 8 at addr ffff888118a93110 by task syz.0.17/399

CPU: 1 PID: 399 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 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:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 tty_port_kopened include/linux/tty_port.h:228 [inline]
 check_tty_count+0x1a8/0x330 drivers/tty/tty_io.c:287
 tty_release+0x88/0x11d0 drivers/tty/tty_io.c:1736
 __fput+0x1fd/0x8f0 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5e2a59e0d9
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:00007ffc4e5b6568 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f5e2a827da0 RCX: 00007f5e2a59e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5e2a827da0 R08: 00007f5e2a826038 R09: 0000000000000000
R10: 000000000003fda0 R11: 0000000000000246 R12: 0000000000007542
R13: 00007f5e2a825fac R14: 0000000000007237 R15: 00007ffc4e5b6670
 </TASK>

Allocated by task 400:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:380 [inline]
 __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 kmalloc_trace+0x40/0xb0 mm/slab_common.c:1033
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 gs_port_alloc drivers/usb/gadget/function/u_serial.c:1166 [inline]
 gserial_alloc_line_no_console+0x238/0x700 drivers/usb/gadget/function/u_serial.c:1246
 obex_alloc_inst+0x86/0xe0 drivers/usb/gadget/function/f_obex.c:435
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xf3/0x310 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x360 drivers/usb/gadget/configfs.c:652
 configfs_mkdir+0x518/0x9e0 fs/configfs/dir.c:1329
 vfs_mkdir+0x39c/0x580 fs/namei.c:4113
 do_mkdirat+0x174/0x4d0 fs/namei.c:4138
 __do_sys_mkdirat fs/namei.c:4153 [inline]
 __se_sys_mkdirat fs/namei.c:4151 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4151
 x64_sys_call+0x73d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 400:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x132/0x180 mm/kasan/common.c:242
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:250
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1750 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1776
 slab_free mm/slub.c:3712 [inline]
 __kmem_cache_free+0xb7/0x1b0 mm/slub.c:3728
 kfree+0x6f/0xf0 mm/slab_common.c:990
 gserial_free_port+0x240/0x2d0 drivers/usb/gadget/function/u_serial.c:1210
 gserial_free_line+0x9b/0x1a0 drivers/usb/gadget/function/u_serial.c:1227
 obex_free_inst+0x39/0x60 drivers/usb/gadget/function/f_obex.c:421
 usb_put_function_instance+0x9b/0xc0 drivers/usb/gadget/functions.c:77
 obex_attr_release+0x15/0x20 drivers/usb/gadget/function/f_obex.c:391
 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+0x166/0x210 fs/configfs/item.c:149
 configfs_rmdir+0x8c9/0x980 fs/configfs/dir.c:1540
 vfs_rmdir+0x381/0x4f0 fs/namei.c:4198
 do_rmdir+0x261/0x6b0 fs/namei.c:4259
 __do_sys_rmdir fs/namei.c:4278 [inline]
 __se_sys_rmdir fs/namei.c:4276 [inline]
 __x64_sys_rmdir+0x49/0x50 fs/namei.c:4276
 x64_sys_call+0x68e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:85
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888118a93000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
 1024-byte region [ffff888118a93000, ffff888118a93400)

The buggy address belongs to the physical page:
page:ffffea000462a400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118a90
head:ffffea000462a400 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 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 344, tgid 344 (kworker/u4:3), ts 29176600274, free_ts 29111180650
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4586
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5930
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3e0 mm/slub.c:2020
 ___slab_alloc+0x70f/0xb70 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x204/0x2d0 mm/slub.c:3423
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node_track_caller+0xa1/0x1e0 mm/slab_common.c:958
 kmalloc_reserve net/core/skbuff.c:449 [inline]
 __alloc_skb+0x226/0x4a0 net/core/skbuff.c:518
 alloc_skb include/linux/skbuff.h:1322 [inline]
 nlmsg_new include/net/netlink.h:987 [inline]
 inet6_rt_notify+0x34d/0x520 net/ipv6/route.c:6218
 fib6_add_rt2node net/ipv6/ip6_fib.c:1261 [inline]
 fib6_add+0x2254/0x3dd0 net/ipv6/ip6_fib.c:1490
 __ip6_ins_rt net/ipv6/route.c:1343 [inline]
 ip6_route_add+0x89/0x130 net/ipv6/route.c:3896
 addrconf_prefix_route net/ipv6/addrconf.c:2466 [inline]
 addrconf_add_linklocal+0x3d2/0x660 net/ipv6/addrconf.c:3285
 addrconf_addr_gen+0x542/0x690 net/ipv6/addrconf.c:3414
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1580 [inline]
 free_pcp_prepare mm/page_alloc.c:1654 [inline]
 free_unref_page_prepare+0x80c/0x820 mm/page_alloc.c:3621
 free_unref_page+0x93/0x530 mm/page_alloc.c:3719
 free_the_page mm/page_alloc.c:863 [inline]
 __free_pages+0x67/0x100 mm/page_alloc.c:6020
 __free_slab+0xc7/0x1a0 mm/slub.c:2044
 free_slab mm/slub.c:2059 [inline]
 discard_slab mm/slub.c:2065 [inline]
 __unfreeze_partials+0x15a/0x190 mm/slub.c:2614
 put_cpu_partial+0xa9/0x100 mm/slub.c:2690
 __slab_free+0x1c4/0x280 mm/slub.c:3589
 do_slab_free mm/slub.c:3666 [inline]
 ___cache_free+0xbf/0xd0 mm/slub.c:3722
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0xc6/0x140 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:311
 kasan_slab_alloc include/linux/kasan.h:202 [inline]
 slab_post_alloc_hook+0x4f/0x2d0 mm/slab.h:768
 slab_alloc_node mm/slub.c:3382 [inline]
 kmem_cache_alloc_node+0x179/0x330 mm/slub.c:3429
 __alloc_skb+0xe8/0x4a0 net/core/skbuff.c:508
 alloc_skb include/linux/skbuff.h:1322 [inline]
 alloc_skb_with_frags+0xa8/0x620 net/core/skbuff.c:6176
 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2761

Memory state around the buggy address:
 ffff888118a93000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888118a93080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888118a93100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff888118a93180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888118a93200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
WARNING: CPU: 0 PID: 399 at drivers/usb/gadget/function/u_serial.c:694 gs_close+0x17d/0x9b0 drivers/usb/gadget/function/u_serial.c:694
Modules linked in:
CPU: 0 PID: 399 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:694
Code: 74 23 fe 41 ff cc 42 0f b6 04 2b 84 c0 0f 85 cf 06 00 00 48 8b 44 24 20 44 89 20 48 8b 5c 24 38 e9 cb 02 00 00 e8 93 74 23 fe <0f> 0b 48 8b 5c 24 38 e9 ba 02 00 00 e8 82 74 23 fe 49 8d bf a8 02
RSP: 0018:ffffc90000a97b60 EFLAGS: 00010093
RAX: ffffffff834df1ad RBX: 1ffff1102315261a RCX: ffff888119399440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a97c80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000152f5c R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff92000152f74 R15: ffff888118a93000
FS:  000055555d5b7500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a78e99ff8 CR3: 0000000130894000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tty_release+0x32b/0x11d0 drivers/tty/tty_io.c:1753
 __fput+0x1fd/0x8f0 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5e2a59e0d9
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:00007ffc4e5b6568 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f5e2a827da0 RCX: 00007f5e2a59e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5e2a827da0 R08: 00007f5e2a826038 R09: 0000000000000000
R10: 000000000003fda0 R11: 0000000000000246 R12: 0000000000007542
R13: 00007f5e2a825fac R14: 0000000000007237 R15: 00007ffc4e5b6670
 </TASK>
---[ end trace 0000000000000000 ]---