Extracting prog: 5m35.773831322s
Minimizing prog: 1h4m54.155114935s
Simplifying prog options: 10m22.050143656s
Extracting C: 3m20.249109508s
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$tipc-sendmsg$tipc-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program crashed: BUG: soft lockup in sock_setsockopt
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=7m5.397792804s, {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$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
sendmsg$tipc(r0, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)

program did not crash
testing program (duration=7m5.397792804s, {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$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff})
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program did not crash
testing program (duration=7m5.397792804s, {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}}): sendmsg$tipc-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
sendmsg$tipc(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(0xffffffffffffffff, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program did not crash
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program did not crash
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, 0x0)
sendmsg$tipc(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(0xffffffffffffffff, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program did not crash
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, 0x0, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program did not crash
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program did not crash
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program did not crash
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
program crashed: BUG: soft lockup in sock_close
a never seen crash title: BUG: soft lockup in sock_close, ignore
simplifying guilty program options
testing program (duration=7m5.397792804s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-sendmsg$tipc-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program did not crash
testing program (duration=7m5.397792804s, {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$tipc-sendmsg$tipc-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program crashed: BUG: soft lockup in sys_sendmsg
a never seen crash title: BUG: soft lockup in sys_sendmsg, ignore
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program crashed: BUG: soft lockup in sock_setsockopt
validation run: crashed=true
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program crashed: BUG: soft lockup in sock_setsockopt
validation run: crashed=true
testing program (duration=7m5.397792804s, {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-setsockopt$sock_attach_bpf
detailed listing:
executing program 0:
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000100)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$tipc(r1, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4040840}, 0x941) (async, rerun: 64)
setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4)

program crashed: BUG: soft lockup in sys_sendmsg
validation run: crashed=true
reproducing took 1h32m43.824769962s
repro crashed as (corrupted=false):
watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.0.1207:4000]
Modules linked in:
CPU: 0 PID: 4000 Comm: syz.0.1207 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
RIP: 0010:kvm_wait+0xce/0x130 arch/x86/kernel/kvm.c:926
Code: 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 73 1d b8 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 64 1d b8 03 fb f4 <4c> 89 64 24 18 ff 74 24 18 9d 48 c7 44 24 20 0e 36 e0 45 4b c7 04
RSP: 0018:ffffc900013f76e0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88811d201e88 RCX: ffffffff814beb04
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811d201e88
RBP: ffffc900013f7790 R08: ffff88811d201e88 R09: 1ffff11023a403d1
R10: dffffc0000000000 R11: ffffed1023a403d2 R12: 0000000000000246
R13: fd499096c2439ed8 R14: dffffc0000000000 R15: 1ffff9200027eee0
FS:  00007f20d7ed66c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000100 CR3: 000000011ad00000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x72d/0xb80 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [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:184 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:360 [inline]
 lock_sock_nested+0x90/0x2a0 net/core/sock.c:3124
 lock_sock include/net/sock.h:1697 [inline]
 tipc_sendstream+0x47/0x70 net/tipc/socket.c:1544
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2377
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2431
 __sys_sendmsg net/socket.c:2460 [inline]
 __do_sys_sendmsg net/socket.c:2469 [inline]
 __se_sys_sendmsg net/socket.c:2467 [inline]
 __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2467
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f20d8075159
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:00007f20d7ed6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f20d82fcfa0 RCX: 00007f20d8075159
RDX: 0000000000000941 RSI: 00002000000004c0 RDI: 0000000000000004
RBP: 00007f20d810c024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f20d82fd038 R14: 00007f20d82fcfa0 R15: 00007ffe99d090c8
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4002 Comm: syz.0.1207 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x60 kernel/kcov.c:190
Code: 00 00 0f 0b 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d 9c c3 5e 05 48 89 de e8 d4 dc 39 00 5b 5d c3 00 55 <48> 89 e5 48 8b 45 08 65 48 8b 0d c0 b8 9d 7e 65 8b 15 c5 b8 9d 7e
RSP: 0018:ffffc90001366750 EFLAGS: 00000246
RAX: ffffffff846744be RBX: 0000000000000022 RCX: 0000000000000000
RDX: ffff888126c993c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001366850 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200026ccfc R12: 0000000000000000
R13: ffff88810fd4a004 R14: 0000000023fddd60 R15: ffff88810fe950de
FS:  00007f20d7eb56c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20d7eb4ff8 CR3: 000000011ad00000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tipc_sk_rcv+0x350/0x1df0 net/tipc/socket.c:2494
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_node_xmit_skb net/tipc/node.c:1744 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759
 tipc_sk_rcv+0x1913/0x1df0 net/tipc/socket.c:2503
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_sk_push_backlog+0x4d3/0x7b0 net/tipc/socket.c:1307
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1362 [inline]
 tipc_sk_proto_rcv+0xa32/0x1b60 net/tipc/socket.c:2160
 tipc_sk_filter_rcv+0x30bc/0x3860 net/tipc/socket.c:2356
 tipc_sk_enqueue net/tipc/socket.c:2448 [inline]
 tipc_sk_rcv+0x745/0x1df0 net/tipc/socket.c:2499
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_node_xmit_skb net/tipc/node.c:1744 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759
 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2416
 sk_backlog_rcv include/net/sock.h:1071 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2588
 release_sock net/core/sock.c:3141 [inline]
 sock_setsockopt+0x1801/0x2620 net/core/sock.c:1256
 __sys_setsockopt+0x272/0x480 net/socket.c:2143
 __do_sys_setsockopt net/socket.c:2158 [inline]
 __se_sys_setsockopt net/socket.c:2155 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2155
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f20d8075159
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:00007f20d7eb5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f20d82fd090 RCX: 00007f20d8075159
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f20d810c024 R08: 0000000000000004 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f20d82fd128 R14: 00007f20d82fd090 R15: 00007ffe99d090c8

final repro crashed as (corrupted=false):
watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.0.1207:4000]
Modules linked in:
CPU: 0 PID: 4000 Comm: syz.0.1207 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
RIP: 0010:kvm_wait+0xce/0x130 arch/x86/kernel/kvm.c:926
Code: 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 73 1d b8 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 64 1d b8 03 fb f4 <4c> 89 64 24 18 ff 74 24 18 9d 48 c7 44 24 20 0e 36 e0 45 4b c7 04
RSP: 0018:ffffc900013f76e0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88811d201e88 RCX: ffffffff814beb04
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811d201e88
RBP: ffffc900013f7790 R08: ffff88811d201e88 R09: 1ffff11023a403d1
R10: dffffc0000000000 R11: ffffed1023a403d2 R12: 0000000000000246
R13: fd499096c2439ed8 R14: dffffc0000000000 R15: 1ffff9200027eee0
FS:  00007f20d7ed66c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000100 CR3: 000000011ad00000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x72d/0xb80 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [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:184 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:360 [inline]
 lock_sock_nested+0x90/0x2a0 net/core/sock.c:3124
 lock_sock include/net/sock.h:1697 [inline]
 tipc_sendstream+0x47/0x70 net/tipc/socket.c:1544
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2377
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2431
 __sys_sendmsg net/socket.c:2460 [inline]
 __do_sys_sendmsg net/socket.c:2469 [inline]
 __se_sys_sendmsg net/socket.c:2467 [inline]
 __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2467
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f20d8075159
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:00007f20d7ed6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f20d82fcfa0 RCX: 00007f20d8075159
RDX: 0000000000000941 RSI: 00002000000004c0 RDI: 0000000000000004
RBP: 00007f20d810c024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f20d82fd038 R14: 00007f20d82fcfa0 R15: 00007ffe99d090c8
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4002 Comm: syz.0.1207 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x60 kernel/kcov.c:190
Code: 00 00 0f 0b 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d 9c c3 5e 05 48 89 de e8 d4 dc 39 00 5b 5d c3 00 55 <48> 89 e5 48 8b 45 08 65 48 8b 0d c0 b8 9d 7e 65 8b 15 c5 b8 9d 7e
RSP: 0018:ffffc90001366750 EFLAGS: 00000246
RAX: ffffffff846744be RBX: 0000000000000022 RCX: 0000000000000000
RDX: ffff888126c993c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001366850 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200026ccfc R12: 0000000000000000
R13: ffff88810fd4a004 R14: 0000000023fddd60 R15: ffff88810fe950de
FS:  00007f20d7eb56c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20d7eb4ff8 CR3: 000000011ad00000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tipc_sk_rcv+0x350/0x1df0 net/tipc/socket.c:2494
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_node_xmit_skb net/tipc/node.c:1744 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759
 tipc_sk_rcv+0x1913/0x1df0 net/tipc/socket.c:2503
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_sk_push_backlog+0x4d3/0x7b0 net/tipc/socket.c:1307
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1362 [inline]
 tipc_sk_proto_rcv+0xa32/0x1b60 net/tipc/socket.c:2160
 tipc_sk_filter_rcv+0x30bc/0x3860 net/tipc/socket.c:2356
 tipc_sk_enqueue net/tipc/socket.c:2448 [inline]
 tipc_sk_rcv+0x745/0x1df0 net/tipc/socket.c:2499
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_node_xmit_skb net/tipc/node.c:1744 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759
 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2416
 sk_backlog_rcv include/net/sock.h:1071 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2588
 release_sock net/core/sock.c:3141 [inline]
 sock_setsockopt+0x1801/0x2620 net/core/sock.c:1256
 __sys_setsockopt+0x272/0x480 net/socket.c:2143
 __do_sys_setsockopt net/socket.c:2158 [inline]
 __se_sys_setsockopt net/socket.c:2155 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2155
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f20d8075159
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:00007f20d7eb5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f20d82fd090 RCX: 00007f20d8075159
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f20d810c024 R08: 0000000000000004 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f20d82fd128 R14: 00007f20d82fd090 R15: 00007ffe99d090c8