Extracting prog: 7m44.626896681s
Minimizing prog: 43m24.836989269s
Simplifying prog options: 12m11.550777831s
Extracting C: 5m11.557733836s
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: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$bt_l2cap-bind$bt_l2cap-listen-read$FUSE-syz_fuse_handle_req-write$FUSE_INIT-syz_fuse_handle_req-open
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
read$FUSE(0xffffffffffffffff, &(0x7f0000006840)={0x2020}, 0x2020)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)
write$FUSE_INIT(0xffffffffffffffff, 0x0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)
open(&(0x7f00000001c0)='./file0/file0\x00', 0x2, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {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$bt_l2cap-bind$bt_l2cap-listen-read$FUSE-syz_fuse_handle_req-write$FUSE_INIT-syz_fuse_handle_req-open
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
read$FUSE(0xffffffffffffffff, &(0x7f0000006840)={0x2020}, 0x2020)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)
write$FUSE_INIT(0xffffffffffffffff, 0x0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)
open(&(0x7f00000001c0)='./file0/file0\x00', 0x2, 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: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$bt_l2cap-bind$bt_l2cap-listen-read$FUSE-syz_fuse_handle_req-write$FUSE_INIT-syz_fuse_handle_req-open
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
read$FUSE(0xffffffffffffffff, &(0x7f0000006840)={0x2020}, 0x2020)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)
write$FUSE_INIT(0xffffffffffffffff, 0x0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)
open(&(0x7f00000001c0)='./file0/file0\x00', 0x2, 0x0)

program crashed: general protection fault in lock_sock_nested
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
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$bt_l2cap-bind$bt_l2cap-listen-read$FUSE-syz_fuse_handle_req-write$FUSE_INIT-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
read$FUSE(0xffffffffffffffff, &(0x7f0000006840)={0x2020}, 0x2020)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)
write$FUSE_INIT(0xffffffffffffffff, 0x0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program crashed: general protection fault in lock_sock_nested
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$bt_l2cap-bind$bt_l2cap-listen-read$FUSE-syz_fuse_handle_req-write$FUSE_INIT
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
read$FUSE(0xffffffffffffffff, &(0x7f0000006840)={0x2020}, 0x2020)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)
write$FUSE_INIT(0xffffffffffffffff, 0x0, 0x0)

program crashed: general protection fault in lock_sock_nested
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$bt_l2cap-bind$bt_l2cap-listen-read$FUSE-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
read$FUSE(0xffffffffffffffff, &(0x7f0000006840)={0x2020}, 0x2020)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program crashed: general protection fault in lock_sock_nested
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$bt_l2cap-bind$bt_l2cap-listen-read$FUSE
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
read$FUSE(0xffffffffffffffff, &(0x7f0000006840)={0x2020}, 0x2020)

program did not crash
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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program crashed: general protection fault in lock_sock_nested
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$bt_l2cap-bind$bt_l2cap-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program did not crash
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$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program did not crash
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}}): bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
bind$bt_l2cap(0xffffffffffffffff, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(0xffffffffffffffff, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program did not crash
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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, 0x0, 0x0)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C 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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
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=6m0s, {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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=6m0s, {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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program did not crash
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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program crashed: general protection fault in lock_sock_nested
validation run: crashed=true
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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program did not crash
validation run: crashed=false
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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program did not crash
validation run: crashed=false
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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program crashed: general protection fault in lock_sock_nested
validation run: crashed=true
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$bt_l2cap-bind$bt_l2cap-listen-syz_fuse_handle_req
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
bind$bt_l2cap(r0, &(0x7f00000002c0)={0x1f, 0x0, @any, 0xfffa}, 0xe)
listen(r0, 0x0)
syz_fuse_handle_req(0xffffffffffffffff, 0x0, 0x0, 0x0)

program crashed: general protection fault in lock_sock_nested
validation run: crashed=true
reproducing took 1h30m26.765950738s
repro crashed as (corrupted=false):
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 1 UID: 0 PID: 984 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events l2cap_info_timeout
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0x78/0x290 kernel/locking/spinlock_debug.c:115
Code: 27 9f 81 48 8d 4c 24 20 48 c1 e9 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 48 89 4c 24 18 4a 89 04 39 4c 8d 77 04 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 9f 01 00 00 41 8b 06 3d ad 4e ad de 0f
RSP: 0018:ffffc900039c7780 EFLAGS: 00010203
RAX: 0000000000000038 RBX: 00000000000001c0 RCX: 1ffff92000738ef4
RDX: 0000000000000000 RSI: ffffffff8c04e5e0 RDI: 00000000000001c0
RBP: ffffc900039c7838 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff8a8fb3a0 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000000001c4 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881258c4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdf394e298 CR3: 000000000e338000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x6a/0x100 net/core/sock.c:3736
 lock_sock include/net/sock.h:1669 [inline]
 l2cap_sock_ready_cb+0x45/0x140 net/bluetooth/l2cap_sock.c:1674
 l2cap_chan_ready net/bluetooth/l2cap_core.c:1263 [inline]
 l2cap_conn_start+0x76a/0xe50 net/bluetooth/l2cap_core.c:1512
 l2cap_info_timeout+0x68/0xa0 net/bluetooth/l2cap_core.c:1669
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0x78/0x290 kernel/locking/spinlock_debug.c:115
Code: 27 9f 81 48 8d 4c 24 20 48 c1 e9 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 48 89 4c 24 18 4a 89 04 39 4c 8d 77 04 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 9f 01 00 00 41 8b 06 3d ad 4e ad de 0f
RSP: 0018:ffffc900039c7780 EFLAGS: 00010203
RAX: 0000000000000038 RBX: 00000000000001c0 RCX: 1ffff92000738ef4
RDX: 0000000000000000 RSI: ffffffff8c04e5e0 RDI: 00000000000001c0
RBP: ffffc900039c7838 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff8a8fb3a0 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000000001c4 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881258c4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdf394e298 CR3: 000000000e338000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	9f                   	lahf
   1:	81 48 8d 4c 24 20 48 	orl    $0x4820244c,-0x73(%rax)
   8:	c1 e9 03             	shr    $0x3,%ecx
   b:	48 b8 f1 f1 f1 f1 04 	movabs $0xf3f3f304f1f1f1f1,%rax
  12:	f3 f3 f3
  15:	48 89 4c 24 18       	mov    %rcx,0x18(%rsp)
  1a:	4a 89 04 39          	mov    %rax,(%rcx,%r15,1)
  1e:	4c 8d 77 04          	lea    0x4(%rdi),%r14
  22:	4c 89 f0             	mov    %r14,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 9f 01 00 00    	jne    0x1d5
  36:	41 8b 06             	mov    (%r14),%eax
  39:	3d ad 4e ad de       	cmp    $0xdead4ead,%eax
  3e:	0f                   	.byte 0xf

final repro crashed as (corrupted=false):
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 1 UID: 0 PID: 984 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events l2cap_info_timeout
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0x78/0x290 kernel/locking/spinlock_debug.c:115
Code: 27 9f 81 48 8d 4c 24 20 48 c1 e9 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 48 89 4c 24 18 4a 89 04 39 4c 8d 77 04 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 9f 01 00 00 41 8b 06 3d ad 4e ad de 0f
RSP: 0018:ffffc900039c7780 EFLAGS: 00010203
RAX: 0000000000000038 RBX: 00000000000001c0 RCX: 1ffff92000738ef4
RDX: 0000000000000000 RSI: ffffffff8c04e5e0 RDI: 00000000000001c0
RBP: ffffc900039c7838 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff8a8fb3a0 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000000001c4 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881258c4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdf394e298 CR3: 000000000e338000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x6a/0x100 net/core/sock.c:3736
 lock_sock include/net/sock.h:1669 [inline]
 l2cap_sock_ready_cb+0x45/0x140 net/bluetooth/l2cap_sock.c:1674
 l2cap_chan_ready net/bluetooth/l2cap_core.c:1263 [inline]
 l2cap_conn_start+0x76a/0xe50 net/bluetooth/l2cap_core.c:1512
 l2cap_info_timeout+0x68/0xa0 net/bluetooth/l2cap_core.c:1669
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0x78/0x290 kernel/locking/spinlock_debug.c:115
Code: 27 9f 81 48 8d 4c 24 20 48 c1 e9 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 48 89 4c 24 18 4a 89 04 39 4c 8d 77 04 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 9f 01 00 00 41 8b 06 3d ad 4e ad de 0f
RSP: 0018:ffffc900039c7780 EFLAGS: 00010203
RAX: 0000000000000038 RBX: 00000000000001c0 RCX: 1ffff92000738ef4
RDX: 0000000000000000 RSI: ffffffff8c04e5e0 RDI: 00000000000001c0
RBP: ffffc900039c7838 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff8a8fb3a0 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000000001c4 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881258c4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdf394e298 CR3: 000000000e338000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	9f                   	lahf
   1:	81 48 8d 4c 24 20 48 	orl    $0x4820244c,-0x73(%rax)
   8:	c1 e9 03             	shr    $0x3,%ecx
   b:	48 b8 f1 f1 f1 f1 04 	movabs $0xf3f3f304f1f1f1f1,%rax
  12:	f3 f3 f3
  15:	48 89 4c 24 18       	mov    %rcx,0x18(%rsp)
  1a:	4a 89 04 39          	mov    %rax,(%rcx,%r15,1)
  1e:	4c 8d 77 04          	lea    0x4(%rdi),%r14
  22:	4c 89 f0             	mov    %r14,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 9f 01 00 00    	jne    0x1d5
  36:	41 8b 06             	mov    (%r14),%eax
  39:	3d ad 4e ad de       	cmp    $0xdead4ead,%eax
  3e:	0f                   	.byte 0xf