Extracting prog: 2m29.186848021s
Minimizing prog: 9m8.685931793s
Simplifying prog options: 3m20.60553576s
Extracting C: 1m11.706044866s
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}}): bpf$PROG_LOAD-bpf$BPF_TASK_FD_QUERY-openat$cgroup_root-bpf$BPF_PROG_DETACH
detailed listing:
executing program 0:
r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f0000000280)=ANY=[@ANYBLOB="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"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x70)
bpf$BPF_TASK_FD_QUERY(0x14, &(0x7f0000000240)={0x0, 0xffffffffffffffff, 0x0, 0x7, &(0x7f0000000000)='cgroup\x00'}, 0x30)
r1 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
bpf$BPF_PROG_DETACH(0x8, &(0x7f0000000240)={@cgroup=r1, r0, 0x2, 0x0, 0x4000, @void, @value}, 0x10)

program crashed: possible deadlock in lapbeth_device_event
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=53.79698686s, {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}}): bpf$PROG_LOAD-bpf$BPF_TASK_FD_QUERY-openat$cgroup_root
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f0000000280)=ANY=[@ANYBLOB="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"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x70)
bpf$BPF_TASK_FD_QUERY(0x14, &(0x7f0000000240)={0x0, 0xffffffffffffffff, 0x0, 0x7, &(0x7f0000000000)='cgroup\x00'}, 0x30)
openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)

program crashed: possible deadlock in lapbeth_device_event
testing program (duration=53.79698686s, {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}}): bpf$PROG_LOAD-bpf$BPF_TASK_FD_QUERY
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f0000000280)=ANY=[@ANYBLOB="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"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x70)
bpf$BPF_TASK_FD_QUERY(0x14, &(0x7f0000000240)={0x0, 0xffffffffffffffff, 0x0, 0x7, &(0x7f0000000000)='cgroup\x00'}, 0x30)

program crashed: possible deadlock in lapbeth_device_event
testing program (duration=53.79698686s, {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}}): bpf$PROG_LOAD
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f0000000280)=ANY=[@ANYBLOB="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"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x70)

program crashed: possible deadlock in lapbeth_device_event
testing program (duration=53.79698686s, {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}}): bpf$PROG_LOAD
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, 0x0, 0x0)

program did not crash
testing program (duration=53.79698686s, {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}}): bpf$PROG_LOAD
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, 0x0, &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x94)

program did not crash
testing program (duration=53.79698686s, {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}}): bpf$PROG_LOAD
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f0000000280)=ANY=[@ANYBLOB], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x94)

program did not crash
testing program (duration=53.79698686s, {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}}): bpf$PROG_LOAD
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f0000000280)=ANY=[@ANYBLOB="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"], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x94)

program did not crash
extracting C reproducer
testing compiled C program (duration=53.79698686s, {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}}): bpf$PROG_LOAD
program did not crash
simplifying guilty program options
testing program (duration=53.79698686s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$PROG_LOAD
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f0000000280)=ANY=[@ANYBLOB="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"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x70)

program did not crash
testing program (duration=53.79698686s, {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}}): bpf$PROG_LOAD
detailed listing:
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f0000000280)=ANY=[@ANYBLOB="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"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x70)

program crashed: possible deadlock in lapbeth_device_event
extracting C reproducer
testing compiled C program (duration=53.79698686s, {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}}): bpf$PROG_LOAD
program did not crash
reproducing took 16m33.65702385s
repro crashed as (corrupted=false):
============================================
WARNING: possible recursive locking detected
6.14.0-rc5-syzkaller-01152-g48c57a49c50a #0 Not tainted
--------------------------------------------
dhcpcd/5500 is trying to acquire lock:
ffff88807f734d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline]
ffff88807f734d28 (&dev->lock){+.+.}-{4:4}, at: netif_napi_add_weight include/linux/netdevice.h:2763 [inline]
ffff88807f734d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_new_device drivers/net/wan/lapbether.c:415 [inline]
ffff88807f734d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_device_event+0x766/0xa20 drivers/net/wan/lapbether.c:460

but task is already holding lock:
ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline]
ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline]
ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:67

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&dev->lock);
  lock(&dev->lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

2 locks held by dhcpcd/5500:
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x34c/0x1d80 net/ipv4/devinet.c:1121
 #1: ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline]
 #1: ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline]
 #1: ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:67

stack backtrace:
CPU: 0 UID: 0 PID: 5500 Comm: dhcpcd Not tainted 6.14.0-rc5-syzkaller-01152-g48c57a49c50a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3039
 check_deadlock kernel/locking/lockdep.c:3091 [inline]
 validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3893
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
 netdev_lock include/linux/netdevice.h:2731 [inline]
 netif_napi_add_weight include/linux/netdevice.h:2763 [inline]
 lapbeth_new_device drivers/net/wan/lapbether.c:415 [inline]
 lapbeth_device_event+0x766/0xa20 drivers/net/wan/lapbether.c:460
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 __dev_notify_flags+0x207/0x400
 netif_change_flags+0xf0/0x1a0 net/core/dev.c:9443
 dev_change_flags+0x146/0x270 net/core/dev_api.c:68
 devinet_ioctl+0xea2/0x1d80 net/ipv4/devinet.c:1200
 inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1001
 sock_do_ioctl+0x158/0x460 net/socket.c:1190
 sock_ioctl+0x626/0x8e0 net/socket.c:1309
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa49119dd49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffd2ba931a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa4910cf6c0 RCX: 00007fa49119dd49
RDX: 00007ffd2baa3398 RSI: 0000000000008914 RDI: 000000000000000e
RBP: 00007ffd2bab3558 R08: 00007ffd2baa3358 R09: 00007ffd2baa3308
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd2baa3398 R14: 0000000000000028 R15: 0000000000008914
 </TASK>

final repro crashed as (corrupted=false):
============================================
WARNING: possible recursive locking detected
6.14.0-rc5-syzkaller-01152-g48c57a49c50a #0 Not tainted
--------------------------------------------
dhcpcd/5500 is trying to acquire lock:
ffff88807f734d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline]
ffff88807f734d28 (&dev->lock){+.+.}-{4:4}, at: netif_napi_add_weight include/linux/netdevice.h:2763 [inline]
ffff88807f734d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_new_device drivers/net/wan/lapbether.c:415 [inline]
ffff88807f734d28 (&dev->lock){+.+.}-{4:4}, at: lapbeth_device_event+0x766/0xa20 drivers/net/wan/lapbether.c:460

but task is already holding lock:
ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline]
ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline]
ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:67

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&dev->lock);
  lock(&dev->lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

2 locks held by dhcpcd/5500:
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff8fed6908 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x34c/0x1d80 net/ipv4/devinet.c:1121
 #1: ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2731 [inline]
 #1: ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:40 [inline]
 #1: ffff88807f730d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:67

stack backtrace:
CPU: 0 UID: 0 PID: 5500 Comm: dhcpcd Not tainted 6.14.0-rc5-syzkaller-01152-g48c57a49c50a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3039
 check_deadlock kernel/locking/lockdep.c:3091 [inline]
 validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3893
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
 netdev_lock include/linux/netdevice.h:2731 [inline]
 netif_napi_add_weight include/linux/netdevice.h:2763 [inline]
 lapbeth_new_device drivers/net/wan/lapbether.c:415 [inline]
 lapbeth_device_event+0x766/0xa20 drivers/net/wan/lapbether.c:460
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 __dev_notify_flags+0x207/0x400
 netif_change_flags+0xf0/0x1a0 net/core/dev.c:9443
 dev_change_flags+0x146/0x270 net/core/dev_api.c:68
 devinet_ioctl+0xea2/0x1d80 net/ipv4/devinet.c:1200
 inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1001
 sock_do_ioctl+0x158/0x460 net/socket.c:1190
 sock_ioctl+0x626/0x8e0 net/socket.c:1309
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa49119dd49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffd2ba931a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa4910cf6c0 RCX: 00007fa49119dd49
RDX: 00007ffd2baa3398 RSI: 0000000000008914 RDI: 000000000000000e
RBP: 00007ffd2bab3558 R08: 00007ffd2baa3358 R09: 00007ffd2baa3308
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd2baa3398 R14: 0000000000000028 R15: 0000000000008914
 </TASK>