Extracting prog: 2m23.199200481s
Minimizing prog: 16m57.015266473s
Simplifying prog options: 0s
Extracting C: 32.421846232s
Simplifying C: 10m49.28669454s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs: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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program crashed: general protection fault in h5_recv
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)

program did not crash
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program did not crash
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(0xffffffffffffffff, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program did not crash
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program did not crash
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
ioctl$TIOCSETD(0xffffffffffffffff, 0x5423, &(0x7f00000000c0)=0xf)
r0 = fcntl$dupfd(0xffffffffffffffff, 0x0, 0xffffffffffffffff)
ioctl$TCFLSH(0xffffffffffffffff, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r0, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program did not crash
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program did not crash
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, 0x0, 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program did not crash
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, 0x0)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program did not crash
testing program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r1, 0x5412, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=47.328019989s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program crashed: general protection fault in h5_recv
simplifying C reproducer
testing compiled C program (duration=47.328019989s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program did not crash
testing compiled C program (duration=47.328019989s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program did not crash
testing compiled C program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program crashed: general protection fault in h5_recv
testing compiled C program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program crashed: general protection fault in h5_recv
testing compiled C program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program crashed: general protection fault in h5_recv
testing compiled C program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program crashed: BUG: unable to handle kernel NULL pointer dereference in h5_recv
a never seen crash title: BUG: unable to handle kernel NULL pointer dereference in h5_recv, ignore
testing compiled C program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program crashed: general protection fault in h5_recv
testing compiled C program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
program crashed: general protection fault in h5_recv
testing program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program crashed: general protection fault in h5_recv
validation run: crashed=true
testing program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program crashed: general protection fault in h5_recv
validation run: crashed=true
testing program (duration=47.328019989s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$TIOCSETD-fcntl$dupfd-ioctl$TCFLSH-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSETD(r0, 0x5423, &(0x7f00000000c0)=0xf)
r1 = fcntl$dupfd(r0, 0x0, r0)
ioctl$TCFLSH(r0, 0x400455c8, 0x1000000000000002) (async)
ioctl$TIOCSETD(r1, 0x5412, &(0x7f0000000140)=0xffbfffc0)

program crashed: general protection fault in h5_recv
validation run: crashed=true
reproducing took 35m56.485326847s
repro crashed as (corrupted=false):
Oops: general protection fault, probably for non-canonical address 0xdffffc000000005f: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff]
CPU: 0 UID: 0 PID: 6006 Comm: syz.0.17 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:h5_recv+0x146/0x910 drivers/bluetooth/hci_h5.c:572
Code: 18 48 c1 ea 03 48 89 54 24 28 48 89 d8 48 c1 e8 03 48 89 44 24 50 44 89 64 24 14 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 30 <80> 3c 01 00 74 08 4c 89 ef e8 8c ca b2 f9 4d 8b 65 00 31 ff 4c 89
RSP: 0018:ffffc9000e767c40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000000002e8 RCX: 000000000000005f
RDX: 000000000000005e RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000e767d60 R08: ffff888078e9e01f R09: 1ffff1100f1d3c03
R10: dffffc0000000000 R11: ffffffff88708540 R12: 0000000000000001
R13: 00000000000002f8 R14: ffff888078e9e010 R15: ffffc9000e767e00
FS:  00007fa92e4816c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa92e480f98 CR3: 0000000075fdc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x191/0x220 drivers/bluetooth/hci_ldisc.c:627
 tiocsti+0x239/0x2c0 drivers/tty/tty_io.c:2290
 tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa92d58e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa92e481038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa92d7b6080 RCX: 00007fa92d58e9a9
RDX: 0000200000000140 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007fa92d610d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fa92d7b6080 R15: 00007ffff6566a98
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x146/0x910 drivers/bluetooth/hci_h5.c:572
Code: 18 48 c1 ea 03 48 89 54 24 28 48 89 d8 48 c1 e8 03 48 89 44 24 50 44 89 64 24 14 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 30 <80> 3c 01 00 74 08 4c 89 ef e8 8c ca b2 f9 4d 8b 65 00 31 ff 4c 89
RSP: 0018:ffffc9000e767c40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000000002e8 RCX: 000000000000005f
RDX: 000000000000005e RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000e767d60 R08: ffff888078e9e01f R09: 1ffff1100f1d3c03
R10: dffffc0000000000 R11: ffffffff88708540 R12: 0000000000000001
R13: 00000000000002f8 R14: ffff888078e9e010 R15: ffffc9000e767e00
FS:  00007fa92e4816c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa92e480f98 CR3: 0000000075fdc000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	48 89 54 24 28       	mov    %rdx,0x28(%rsp)
   9:	48 89 d8             	mov    %rbx,%rax
   c:	48 c1 e8 03          	shr    $0x3,%rax
  10:	48 89 44 24 50       	mov    %rax,0x50(%rsp)
  15:	44 89 64 24 14       	mov    %r12d,0x14(%rsp)
  1a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  21:	fc ff df
  24:	48 8b 4c 24 30       	mov    0x30(%rsp),%rcx
* 29:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1) <-- trapping instruction
  2d:	74 08                	je     0x37
  2f:	4c 89 ef             	mov    %r13,%rdi
  32:	e8 8c ca b2 f9       	call   0xf9b2cac3
  37:	4d 8b 65 00          	mov    0x0(%r13),%r12
  3b:	31 ff                	xor    %edi,%edi
  3d:	4c                   	rex.WR
  3e:	89                   	.byte 0x89

final repro crashed as (corrupted=false):
Oops: general protection fault, probably for non-canonical address 0xdffffc000000005f: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff]
CPU: 0 UID: 0 PID: 6006 Comm: syz.0.17 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:h5_recv+0x146/0x910 drivers/bluetooth/hci_h5.c:572
Code: 18 48 c1 ea 03 48 89 54 24 28 48 89 d8 48 c1 e8 03 48 89 44 24 50 44 89 64 24 14 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 30 <80> 3c 01 00 74 08 4c 89 ef e8 8c ca b2 f9 4d 8b 65 00 31 ff 4c 89
RSP: 0018:ffffc9000e767c40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000000002e8 RCX: 000000000000005f
RDX: 000000000000005e RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000e767d60 R08: ffff888078e9e01f R09: 1ffff1100f1d3c03
R10: dffffc0000000000 R11: ffffffff88708540 R12: 0000000000000001
R13: 00000000000002f8 R14: ffff888078e9e010 R15: ffffc9000e767e00
FS:  00007fa92e4816c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa92e480f98 CR3: 0000000075fdc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x191/0x220 drivers/bluetooth/hci_ldisc.c:627
 tiocsti+0x239/0x2c0 drivers/tty/tty_io.c:2290
 tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa92d58e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa92e481038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa92d7b6080 RCX: 00007fa92d58e9a9
RDX: 0000200000000140 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007fa92d610d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fa92d7b6080 R15: 00007ffff6566a98
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x146/0x910 drivers/bluetooth/hci_h5.c:572
Code: 18 48 c1 ea 03 48 89 54 24 28 48 89 d8 48 c1 e8 03 48 89 44 24 50 44 89 64 24 14 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 30 <80> 3c 01 00 74 08 4c 89 ef e8 8c ca b2 f9 4d 8b 65 00 31 ff 4c 89
RSP: 0018:ffffc9000e767c40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000000002e8 RCX: 000000000000005f
RDX: 000000000000005e RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000e767d60 R08: ffff888078e9e01f R09: 1ffff1100f1d3c03
R10: dffffc0000000000 R11: ffffffff88708540 R12: 0000000000000001
R13: 00000000000002f8 R14: ffff888078e9e010 R15: ffffc9000e767e00
FS:  00007fa92e4816c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa92e480f98 CR3: 0000000075fdc000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	48 89 54 24 28       	mov    %rdx,0x28(%rsp)
   9:	48 89 d8             	mov    %rbx,%rax
   c:	48 c1 e8 03          	shr    $0x3,%rax
  10:	48 89 44 24 50       	mov    %rax,0x50(%rsp)
  15:	44 89 64 24 14       	mov    %r12d,0x14(%rsp)
  1a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  21:	fc ff df
  24:	48 8b 4c 24 30       	mov    0x30(%rsp),%rcx
* 29:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1) <-- trapping instruction
  2d:	74 08                	je     0x37
  2f:	4c 89 ef             	mov    %r13,%rdi
  32:	e8 8c ca b2 f9       	call   0xf9b2cac3
  37:	4d 8b 65 00          	mov    0x0(%r13),%r12
  3b:	31 ff                	xor    %edi,%edi
  3d:	4c                   	rex.WR
  3e:	89                   	.byte 0x89