Extracting prog: 6m14.92417383s
Minimizing prog: 1h1m52.967352021s
Simplifying prog options: 15m28.312008043s
Extracting C: 5m7.144990346s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program crashed: KASAN: use-after-free Read in l2cap_unregister_user
program crashed: KASAN: use-after-free Read in l2cap_unregister_user
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap
detailed listing:
executing program 0:
syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)

program did not crash
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
connect$bt_l2cap(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={0xffffffffffffffff, 0xffffffffffffffff, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(0xffffffffffffffff, 0x400448c8, &(0x7f00000000c0)={r0, r0, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, 0x0, 0x0)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, 0x0)

program did not crash
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0x0, 0x0, 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0x0, &(0x7f00000009c0), 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
extracting C reproducer
testing compiled C program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=7m37.937117956s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
testing program (duration=7m37.937117956s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
validation run: crashed=false
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
validation run: crashed=false
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
validation run: crashed=false
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
validation run: crashed=false
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
validation run: crashed=false
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program crashed: KASAN: use-after-free Read in l2cap_unregister_user
validation run: crashed=true
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program crashed: KASAN: use-after-free Read in l2cap_unregister_user
validation run: crashed=true
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
validation run: crashed=false
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
validation run: crashed=false
testing program (duration=7m37.937117956s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_hidp-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6)
r1 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r1, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe)
ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f00000000c0)={r1, r1, 0xc, 0xffffffffffffff2c, &(0x7f00000009c0)="160000000000000000b20c00", 0x2, 0x7f, 0x16c0, 0x5505, 0x48b, 0x1, 0xffffffff, 'syz0\x00'})

program did not crash
validation run: crashed=false
reproducing took 2h36m48.159256792s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:199 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:694 [inline]
BUG: KASAN: use-after-free in __mutex_lock+0x1a24/0x1ca0 kernel/locking/mutex.c:776
Read of size 8 at addr ffff888025fd00a8 by task khidpd_16c05505/11838

CPU: 3 UID: 0 PID: 11838 Comm: khidpd_16c05505 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 __mutex_waiter_is_first kernel/locking/mutex.c:199 [inline]
 __mutex_lock_common kernel/locking/mutex.c:694 [inline]
 __mutex_lock+0x1a24/0x1ca0 kernel/locking/mutex.c:776
 l2cap_unregister_user+0x71/0x240 net/bluetooth/l2cap_core.c:1729
 hidp_session_thread+0x45e/0x680 net/bluetooth/hidp/core.c:1304
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25fd0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff8881016f2b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000130013 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff8881016f2b40 dead000000000122 0000000000000000
head: 0000000000000000 0000000000130013 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea000097f401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 16061, tgid 16061 (syz-executor), ts 345594183336, free_ts 345572205704
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
 prep_new_page mm/page_alloc.c:1865 [inline]
 get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
 __alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab mm/slub.c:3248 [inline]
 new_slab+0x2c3/0x430 mm/slub.c:3302
 ___slab_alloc+0xe18/0x1c90 mm/slub.c:4656
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 kmem_cache_alloc_node_noprof+0x44a/0x800 mm/slub.c:5315
 kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:586
 __alloc_skb+0x186/0x410 net/core/skbuff.c:690
 alloc_skb include/linux/skbuff.h:1383 [inline]
 alloc_uevent_skb+0x7d/0x210 lib/kobject_uevent.c:289
 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:413 [inline]
 kobject_uevent_env+0x1277/0x1920 lib/kobject_uevent.c:608
 netdev_queue_add_kobject net/core/net-sysfs.c:2013 [inline]
 netdev_queue_update_kobjects+0x1a7/0x710 net/core/net-sysfs.c:2056
 register_queue_kobjects net/core/net-sysfs.c:2119 [inline]
 netdev_register_kobject+0x2b3/0x3d0 net/core/net-sysfs.c:2362
 register_netdevice+0x13ac/0x21d0 net/core/dev.c:11393
 __ip_tunnel_create+0x540/0x6b0 net/ipv4/ip_tunnel.c:268
page last free pid 10841 tgid 10841 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1406 [inline]
 __free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
 hci_release_dev+0x4ef/0x640 net/bluetooth/hci_core.c:2776
 bt_host_release+0x6a/0xb0 net/bluetooth/hci_sysfs.c:87
 device_release+0xa4/0x240 drivers/base/core.c:2565
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1ef/0x6f0 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3797
 vhci_release+0x185/0x230 drivers/bluetooth/hci_vhci.c:691
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x150/0x240 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x87f/0x2bd0 kernel/exit.c:971
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
 get_signal+0x2671/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888025fcff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888025fd0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888025fd0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888025fd0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888025fd0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:199 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:694 [inline]
BUG: KASAN: use-after-free in __mutex_lock+0x1a24/0x1ca0 kernel/locking/mutex.c:776
Read of size 8 at addr ffff888025fd00a8 by task khidpd_16c05505/11838

CPU: 3 UID: 0 PID: 11838 Comm: khidpd_16c05505 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 __mutex_waiter_is_first kernel/locking/mutex.c:199 [inline]
 __mutex_lock_common kernel/locking/mutex.c:694 [inline]
 __mutex_lock+0x1a24/0x1ca0 kernel/locking/mutex.c:776
 l2cap_unregister_user+0x71/0x240 net/bluetooth/l2cap_core.c:1729
 hidp_session_thread+0x45e/0x680 net/bluetooth/hidp/core.c:1304
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25fd0
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff8881016f2b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000130013 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff8881016f2b40 dead000000000122 0000000000000000
head: 0000000000000000 0000000000130013 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea000097f401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 16061, tgid 16061 (syz-executor), ts 345594183336, free_ts 345572205704
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
 prep_new_page mm/page_alloc.c:1865 [inline]
 get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
 __alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab mm/slub.c:3248 [inline]
 new_slab+0x2c3/0x430 mm/slub.c:3302
 ___slab_alloc+0xe18/0x1c90 mm/slub.c:4656
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 kmem_cache_alloc_node_noprof+0x44a/0x800 mm/slub.c:5315
 kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:586
 __alloc_skb+0x186/0x410 net/core/skbuff.c:690
 alloc_skb include/linux/skbuff.h:1383 [inline]
 alloc_uevent_skb+0x7d/0x210 lib/kobject_uevent.c:289
 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:413 [inline]
 kobject_uevent_env+0x1277/0x1920 lib/kobject_uevent.c:608
 netdev_queue_add_kobject net/core/net-sysfs.c:2013 [inline]
 netdev_queue_update_kobjects+0x1a7/0x710 net/core/net-sysfs.c:2056
 register_queue_kobjects net/core/net-sysfs.c:2119 [inline]
 netdev_register_kobject+0x2b3/0x3d0 net/core/net-sysfs.c:2362
 register_netdevice+0x13ac/0x21d0 net/core/dev.c:11393
 __ip_tunnel_create+0x540/0x6b0 net/ipv4/ip_tunnel.c:268
page last free pid 10841 tgid 10841 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1406 [inline]
 __free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
 hci_release_dev+0x4ef/0x640 net/bluetooth/hci_core.c:2776
 bt_host_release+0x6a/0xb0 net/bluetooth/hci_sysfs.c:87
 device_release+0xa4/0x240 drivers/base/core.c:2565
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1ef/0x6f0 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3797
 vhci_release+0x185/0x230 drivers/bluetooth/hci_vhci.c:691
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x150/0x240 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x87f/0x2bd0 kernel/exit.c:971
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
 get_signal+0x2671/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888025fcff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888025fd0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888025fd0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888025fd0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888025fd0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================