Extracting prog: 3m42.171644941s
Minimizing prog: 53m10.78001326s
Simplifying prog options: 11m38.565687537s
Extracting C: 2m21.943054899s
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: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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program crashed: BUG: soft lockup in sock_close
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
sendmsg$tipc(r0, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
setsockopt$sock_attach_bpf(0xffffffffffffffff, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(0xffffffffffffffff, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, 0x0)
setsockopt$sock_attach_bpf(0xffffffffffffffff, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(0xffffffffffffffff, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, 0x0, 0x0) (async)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(r1, 0x0, 0x4004) (rerun: 64)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004)

program did not crash
extracting C reproducer
testing compiled C program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
program did not crash
simplifying guilty program options
testing program (duration=5m46.213598182s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program did not crash
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program crashed: BUG: soft lockup in sock_close
validation run: crashed=true
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program crashed: BUG: soft lockup in sock_close
validation run: crashed=true
testing program (duration=5m46.213598182s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f0000000540), 0x4) (async)
sendmsg$tipc(r1, &(0x7f0000000080)={0x0, 0xfffffffffffffdc4, 0x0, 0x0, 0x0, 0x0, 0x200040d0}, 0x4004) (rerun: 64)

program crashed: BUG: soft lockup in sock_close
validation run: crashed=true
reproducing took 1h23m5.601062458s
repro crashed as (corrupted=false):
watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz.2.5956:18234]
Modules linked in:
CPU: 0 PID: 18234 Comm: syz.2.5956 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x105/0x150 arch/x86/kernel/kvm.c:918
Code: 1b d6 03 f4 eb 87 fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 40 38 f0 75 10 66 90 0f 00 2d 2d 1b d6 03 fb f4 <e9> 5e ff ff ff fb e9 58 ff ff ff e8 eb a8 7d 03 89 f9 80 e1 07 38
RSP: 0018:ffffc9000124f920 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff8881206fad88 RCX: ffffffff8150081c
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881206fad88
RBP: ffffc9000124f9b0 R08: ffff8881206fad88 R09: 1ffff110240df5b1
R10: dffffc0000000000 R11: ffffed10240df5b2 R12: ffff88823ff52540
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000249f24
FS:  000055556ee06500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562cf0f562e8 CR3: 00000001185eb000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x605/0x9b0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:188 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:369 [inline]
 lock_sock_nested+0x95/0x2a0 net/core/sock.c:3277
 lock_sock include/net/sock.h:1743 [inline]
 tipc_release+0xb3/0x1610 net/tipc/socket.c:640
 __sock_release net/socket.c:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1336
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f973a8ad159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe74c9cdc8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f973ab36da0 RCX: 00007f973a8ad159
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f973ab36da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f973ab36cb0 R11: 0000000000000246 R12: 000000000003b06f
R13: 00007f973ab3509c R14: 000000000003ad64 R15: 00007f973ab35090
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18238 Comm: syz.2.5956 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x58/0x80 kernel/softirq.c:404
Code: a9 00 ff ff 00 75 19 48 c7 c7 40 2c 08 85 e8 ff c7 6f 03 65 66 8b 05 f7 42 c4 7e 66 85 c0 75 22 bf 01 00 00 00 e8 08 98 08 00 <65> 8b 05 69 40 c3 7e 85 c0 74 02 5d c3 e8 0a 4c c1 ff 5d c3 0f 0b
RSP: 0018:ffffc9000138e8d0 EFLAGS: 00000213
RAX: 0000000000000202 RBX: ffff8881206fad88 RCX: 0000000000000200
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 00000000ffffffff
RBP: ffffc9000138e8d0 R08: ffff8881206fad8b R09: 1ffff110240df5b1
R10: dffffc0000000000 R11: ffffed10240df5b2 R12: dffffc0000000000
R13: 1ffff92000271d1c R14: ffffffff8498b41c R15: 00000000615958de
FS:  00007f973a70e6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557dc15908 CR3: 00000001185eb000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:186 [inline]
 _raw_spin_trylock_bh+0xe5/0x150 kernel/locking/spinlock.c:146
 spin_trylock_bh include/linux/spinlock.h:424 [inline]
 tipc_sk_rcv+0x3ac/0x2ca0 net/tipc/socket.c:2502
 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1788
 tipc_sk_rcv+0x1a3f/0x2ca0 net/tipc/socket.c:2507
 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1708
 tipc_sk_push_backlog net/tipc/socket.c:1317 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2261 [inline]
 tipc_sk_filter_rcv+0x1993/0x2fd0 net/tipc/socket.c:2370
 tipc_sk_enqueue net/tipc/socket.c:2451 [inline]
 tipc_sk_rcv+0x787/0x2ca0 net/tipc/socket.c:2503
 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1788
 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2418
 sk_backlog_rcv include/net/sock.h:1090 [inline]
 __release_sock+0x17c/0x3f0 net/core/sock.c:2736
 release_sock net/core/sock.c:3289 [inline]
 sock_setsockopt+0x1a85/0x2470 net/core/sock.c:1380
 __sys_setsockopt+0x261/0x470 net/socket.c:2199
 __do_sys_setsockopt net/socket.c:2214 [inline]
 __se_sys_setsockopt net/socket.c:2211 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2211
 x64_sys_call+0x982/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f973a8ad159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f973a70e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f973ab34fa0 RCX: 00007f973a8ad159
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f973a94406b R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f973ab35038 R14: 00007f973ab34fa0 R15: 00007ffe74c9cc68
 </TASK>

final repro crashed as (corrupted=false):
watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz.2.5956:18234]
Modules linked in:
CPU: 0 PID: 18234 Comm: syz.2.5956 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x105/0x150 arch/x86/kernel/kvm.c:918
Code: 1b d6 03 f4 eb 87 fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 40 38 f0 75 10 66 90 0f 00 2d 2d 1b d6 03 fb f4 <e9> 5e ff ff ff fb e9 58 ff ff ff e8 eb a8 7d 03 89 f9 80 e1 07 38
RSP: 0018:ffffc9000124f920 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff8881206fad88 RCX: ffffffff8150081c
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881206fad88
RBP: ffffc9000124f9b0 R08: ffff8881206fad88 R09: 1ffff110240df5b1
R10: dffffc0000000000 R11: ffffed10240df5b2 R12: ffff88823ff52540
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000249f24
FS:  000055556ee06500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562cf0f562e8 CR3: 00000001185eb000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x605/0x9b0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:188 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:369 [inline]
 lock_sock_nested+0x95/0x2a0 net/core/sock.c:3277
 lock_sock include/net/sock.h:1743 [inline]
 tipc_release+0xb3/0x1610 net/tipc/socket.c:640
 __sock_release net/socket.c:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1336
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f973a8ad159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe74c9cdc8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f973ab36da0 RCX: 00007f973a8ad159
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f973ab36da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f973ab36cb0 R11: 0000000000000246 R12: 000000000003b06f
R13: 00007f973ab3509c R14: 000000000003ad64 R15: 00007f973ab35090
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18238 Comm: syz.2.5956 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x58/0x80 kernel/softirq.c:404
Code: a9 00 ff ff 00 75 19 48 c7 c7 40 2c 08 85 e8 ff c7 6f 03 65 66 8b 05 f7 42 c4 7e 66 85 c0 75 22 bf 01 00 00 00 e8 08 98 08 00 <65> 8b 05 69 40 c3 7e 85 c0 74 02 5d c3 e8 0a 4c c1 ff 5d c3 0f 0b
RSP: 0018:ffffc9000138e8d0 EFLAGS: 00000213
RAX: 0000000000000202 RBX: ffff8881206fad88 RCX: 0000000000000200
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 00000000ffffffff
RBP: ffffc9000138e8d0 R08: ffff8881206fad8b R09: 1ffff110240df5b1
R10: dffffc0000000000 R11: ffffed10240df5b2 R12: dffffc0000000000
R13: 1ffff92000271d1c R14: ffffffff8498b41c R15: 00000000615958de
FS:  00007f973a70e6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557dc15908 CR3: 00000001185eb000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:186 [inline]
 _raw_spin_trylock_bh+0xe5/0x150 kernel/locking/spinlock.c:146
 spin_trylock_bh include/linux/spinlock.h:424 [inline]
 tipc_sk_rcv+0x3ac/0x2ca0 net/tipc/socket.c:2502
 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1788
 tipc_sk_rcv+0x1a3f/0x2ca0 net/tipc/socket.c:2507
 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1708
 tipc_sk_push_backlog net/tipc/socket.c:1317 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2261 [inline]
 tipc_sk_filter_rcv+0x1993/0x2fd0 net/tipc/socket.c:2370
 tipc_sk_enqueue net/tipc/socket.c:2451 [inline]
 tipc_sk_rcv+0x787/0x2ca0 net/tipc/socket.c:2503
 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1788
 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2418
 sk_backlog_rcv include/net/sock.h:1090 [inline]
 __release_sock+0x17c/0x3f0 net/core/sock.c:2736
 release_sock net/core/sock.c:3289 [inline]
 sock_setsockopt+0x1a85/0x2470 net/core/sock.c:1380
 __sys_setsockopt+0x261/0x470 net/socket.c:2199
 __do_sys_setsockopt net/socket.c:2214 [inline]
 __se_sys_setsockopt net/socket.c:2211 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2211
 x64_sys_call+0x982/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f973a8ad159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f973a70e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f973ab34fa0 RCX: 00007f973a8ad159
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f973a94406b R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f973ab35038 R14: 00007f973ab34fa0 R15: 00007ffe74c9cc68
 </TASK>