Extracting prog: 6m58.122766335s
Minimizing prog: 51m4.808218227s
Simplifying prog options: 19m4.652616357s
Extracting C: 5m11.980005583s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-mkdirat-mount$bind-syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(&(0x7f0000000300)='./file0/../file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x89101a, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-mkdirat-mount$bind-syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(&(0x7f0000000300)='./file0/../file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x89101a, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program crashed: BUG: unable to handle kernel paging request in lock_sock_nested
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-mkdirat-mount$bind-syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(&(0x7f0000000300)='./file0/../file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x89101a, 0x0)

program did not crash
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-mkdirat-mount$bind-syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program crashed: BUG: unable to handle kernel paging request in lock_sock_nested
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-mkdirat-mount$bind-syz_init_net_socket$bt_l2cap-bind$bt_l2cap-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program did not crash
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-mkdirat-mount$bind-syz_init_net_socket$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
listen(r0, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program did not crash
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-mkdirat-mount$bind-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
bind$bt_l2cap(0xffffffffffffffff, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(0xffffffffffffffff, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program did not crash
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-mkdirat-syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x0)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program crashed: BUG: unable to handle kernel paging request in lock_sock_nested
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
mmap$IORING_OFF_SQ_RING(&(0x7f0000400000/0xc00000)=nil, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0)
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program crashed: BUG: unable to handle kernel paging request in lock_sock_nested
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program crashed: lost connection to test machine
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, 0x0, 0x0)
listen(r0, 0x0)
mount$bind(0x0, &(0x7f0000000480)='./file0/../file0\x00', 0x0, 0x0, 0x0)

program did not crash
testing program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(0x0, 0x0, 0x0, 0x0, 0x0)

program crashed: BUG: unable to handle kernel paging request in lock_sock_nested
extracting C reproducer
testing compiled C program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m49.464024991s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(0x0, 0x0, 0x0, 0x0, 0x0)

program crashed: BUG: unable to handle kernel paging request in lock_sock_nested
extracting C reproducer
testing compiled C program (duration=6m49.464024991s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m49.464024991s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-mount$bind
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000001180)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0x0)
mount$bind(0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
reproducing took 1h22m21.308378672s
repro crashed as (corrupted=false):
Unable to handle kernel paging request at virtual address dfff800000000026
KASAN: null-ptr-deref in range [0x0000000000000130-0x0000000000000137]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000026] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4398 Comm: kworker/1:11 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events l2cap_info_timeout
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire+0x104/0x7680 kernel/locking/lockdep.c:4919
lr : lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
sp : ffff800021697480
x29: ffff800021697720 x28: 1ffff00002b600b1 x27: ffff8000115d2798
x26: 0000000000000001 x25: ffff7000042d2eb4 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: 0000000000000130 x18: ffff800021697300
x17: ffff800018c59000 x16: ffff80001232ac9c x15: ffff800018739f80
x14: ffff0000cf8241f8 x13: ffff8000216975a0 x12: dfff800000000000
x11: ffff800008306064 x10: ffff800015b0058c x9 : 00000000000000f3
x8 : 0000000000000026 x7 : ffff8000115d2798 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000130
Call trace:
 __lock_acquire+0x104/0x7680 kernel/locking/lockdep.c:4919
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
 lock_sock_nested+0x78/0x138 net/core/sock.c:3488
 lock_sock include/net/sock.h:1756 [inline]
 l2cap_sock_ready_cb+0x4c/0x130 net/bluetooth/l2cap_sock.c:1694
 l2cap_chan_ready net/bluetooth/l2cap_core.c:1410 [inline]
 l2cap_conn_start+0x6e0/0xd8c net/bluetooth/l2cap_core.c:1668
 l2cap_info_timeout+0x68/0xb8 net/bluetooth/l2cap_core.c:1835
 process_one_work+0x804/0x1484 kernel/workqueue.c:2292
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
Code: 9006c508 b94d2108 34000208 d343fe68 (386c6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9006c508 	adrp	x8, 0xd8a0000
   4:	b94d2108 	ldr	w8, [x8, #3360]
   8:	34000208 	cbz	w8, 0x48
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	386c6908 	ldrb	w8, [x8, x12] <-- trapping instruction

final repro crashed as (corrupted=false):
Unable to handle kernel paging request at virtual address dfff800000000026
KASAN: null-ptr-deref in range [0x0000000000000130-0x0000000000000137]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000026] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4398 Comm: kworker/1:11 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events l2cap_info_timeout
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire+0x104/0x7680 kernel/locking/lockdep.c:4919
lr : lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
sp : ffff800021697480
x29: ffff800021697720 x28: 1ffff00002b600b1 x27: ffff8000115d2798
x26: 0000000000000001 x25: ffff7000042d2eb4 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: 0000000000000130 x18: ffff800021697300
x17: ffff800018c59000 x16: ffff80001232ac9c x15: ffff800018739f80
x14: ffff0000cf8241f8 x13: ffff8000216975a0 x12: dfff800000000000
x11: ffff800008306064 x10: ffff800015b0058c x9 : 00000000000000f3
x8 : 0000000000000026 x7 : ffff8000115d2798 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000130
Call trace:
 __lock_acquire+0x104/0x7680 kernel/locking/lockdep.c:4919
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
 lock_sock_nested+0x78/0x138 net/core/sock.c:3488
 lock_sock include/net/sock.h:1756 [inline]
 l2cap_sock_ready_cb+0x4c/0x130 net/bluetooth/l2cap_sock.c:1694
 l2cap_chan_ready net/bluetooth/l2cap_core.c:1410 [inline]
 l2cap_conn_start+0x6e0/0xd8c net/bluetooth/l2cap_core.c:1668
 l2cap_info_timeout+0x68/0xb8 net/bluetooth/l2cap_core.c:1835
 process_one_work+0x804/0x1484 kernel/workqueue.c:2292
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
Code: 9006c508 b94d2108 34000208 d343fe68 (386c6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9006c508 	adrp	x8, 0xd8a0000
   4:	b94d2108 	ldr	w8, [x8, #3360]
   8:	34000208 	cbz	w8, 0x48
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	386c6908 	ldrb	w8, [x8, x12] <-- trapping instruction