Extracting prog: 7m44.267025778s Minimizing prog: 55m0.221296372s Simplifying prog options: 9m11.049429646s Extracting C: 2m26.822184576s 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: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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program crashed: INFO: rcu detected stall in corrupted program crashed: INFO: rcu detected stall in vm_area_alloc single: successfully extracted reproducer found reproducer with 3 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}}): socketpair$tipc-setsockopt$sock_attach_bpf detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) 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}}): socketpair$tipc-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) sendmsg$tipc(r0, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) 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}}): setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: setsockopt$sock_attach_bpf(0xffffffffffffffff, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(0xffffffffffffffff, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) 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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) 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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, 0x0) setsockopt$sock_attach_bpf(0xffffffffffffffff, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(0xffffffffffffffff, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) 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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, 0x0, 0x0) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) 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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) 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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, 0x0, 0x8010) (rerun: 64) 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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) 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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc program crashed: INFO: rcu detected stall in corrupted a never seen crash title: INFO: rcu detected stall in corrupted, ignore simplifying guilty program options testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program crashed: INFO: rcu detected stall in corrupted a never seen crash title: INFO: rcu detected stall in corrupted, ignore testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true reproducing took 1h23m45.596037254s repro crashed as (corrupted=true): rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10500 ticks this GP) idle=92dc/1/0x4000000000000000 softirq=19941/19941 fqs=0 rcu: (t=10500 jiffies g=19257 q=198 ncpus=2) rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g19257 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=12661 rcu: rcu_preempt kthread starved for 10500 jiffies! g19257 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:I stack:26568 pid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5380 [inline] __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699 schedule+0xbd/0x170 kernel/sched/core.c:6773 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 PID: 8839 Comm: syz.1.1171 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:148 Code: cc cc cc cc cc cc cc f3 0f 1e fa 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 66 90 0f 00 2d c3 f4 38 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 66 0f 1f 00 55 41 57 41 56 RSP: 0018:ffffc9000b7e7738 EFLAGS: 000002d3 RAX: ffffffff813a23aa RBX: 0000000000000003 RCX: ffff88803041da00 RDX: 0000000000000000 RSI: ffffffff8aaabce0 RDI: ffffffff8afc6f40 RBP: ffffc9000b7e7810 R08: ffffffff90da961f R09: 1ffffffff21b52c3 R10: dffffc0000000000 R11: fffffbfff21b52c4 R12: dffffc0000000000 R13: 0000000000000200 R14: 0000000000000003 R15: 1ffff920016fceec FS: 00007fae313fe6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae313fdf98 CR3: 0000000019ed3000 CR4: 00000000003506e0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:108 [inline] kvm_wait+0x22f/0x290 arch/x86/kernel/kvm.c:1058 pv_wait arch/x86/include/asm/paravirt.h:598 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x61a/0x9d0 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x24e/0x2c0 kernel/locking/spinlock_debug.c:115 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x6a/0x100 net/core/sock.c:3538 lock_sock include/net/sock.h:1767 [inline] tipc_sendstream+0x47/0x70 net/tipc/socket.c:1550 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x5bf/0x950 net/socket.c:2595 ___sys_sendmsg+0x220/0x290 net/socket.c:2649 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2687 [inline] __se_sys_sendmsg+0x1a5/0x270 net/socket.c:2685 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fae31d8f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fae313fe038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fae31fe6090 RCX: 00007fae31d8f749 RDX: 0000000000008010 RSI: 0000200000000240 RDI: 0000000000000004 RBP: 00007fae31e13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fae31fe6128 R14: 00007fae31fe6090 R15: 00007fff25639728 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8834 Comm: syz.1.1171 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:debug_lockdep_rcu_enabled+0xd/0x30 kernel/rcu/update.c:319 Code: 48 c7 c6 a0 df aa 8a e8 51 d9 e0 f6 0f 0b eb d1 cc cc cc cc cc cc cc cc cc cc cc cc cc f3 0f 1e fa 31 c0 83 3d 9f 4b db 03 00 <74> 1d 83 3d 26 7f db 03 00 74 14 65 48 8b 0d f0 71 94 75 31 c0 83 RSP: 0018:ffffc9000b5de368 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8880210c0000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000b5de470 R08: dffffc0000000000 R09: 1ffffffff21b52a0 R10: dffffc0000000000 R11: fffffbfff21b52a1 R12: ffff888025441138 R13: ffff888025ab4000 R14: dffffc0000000000 R15: ffff888025440000 FS: 00007fae32b3e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f780226615a CR3: 0000000019ed3000 CR4: 00000000003506f0 Call Trace: rcu_read_lock_held_common kernel/rcu/update.c:104 [inline] rcu_read_lock_held+0xa/0x40 kernel/rcu/update.c:348 __rhashtable_lookup include/linux/rhashtable.h:602 [inline] rhashtable_lookup include/linux/rhashtable.h:646 [inline] tipc_sk_lookup+0x1b7/0x910 net/tipc/socket.c:3004 tipc_sk_rcv+0x3fa/0x2b80 net/tipc/socket.c:2495 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x29e/0x3b0 net/tipc/node.c:1783 tipc_sk_rcv+0x261b/0x2b80 net/tipc/socket.c:2504 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_sk_push_backlog+0x4ef/0x900 net/tipc/socket.c:1317 tipc_sk_conn_proto_rcv net/tipc/socket.c:1371 [inline] tipc_sk_proto_rcv+0x8c3/0x16f0 net/tipc/socket.c:2161 tipc_sk_filter_rcv+0x2df1/0x3030 net/tipc/socket.c:2355 tipc_sk_enqueue net/tipc/socket.c:2448 [inline] tipc_sk_rcv+0x8a6/0x2b80 net/tipc/socket.c:2500 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x29e/0x3b0 net/tipc/node.c:1783 tipc_sk_backlog_rcv+0x1a2/0x230 net/tipc/socket.c:2415 sk_backlog_rcv include/net/sock.h:1129 [inline] __release_sock+0x1e5/0x460 net/core/sock.c:3011 release_sock+0x5f/0x1c0 net/core/sock.c:3550 sk_setsockopt+0x1d02/0x29d0 net/core/sock.c:-1 do_sock_setsockopt+0x11b/0x1a0 net/socket.c:2318 __sys_setsockopt net/socket.c:2345 [inline] __do_sys_setsockopt net/socket.c:2354 [inline] __se_sys_setsockopt net/socket.c:2351 [inline] __x64_sys_setsockopt+0x184/0x200 net/socket.c:2351 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fae31d8f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fae32b3e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fae31fe5fa0 RCX: 00007fae31d8f749 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007fae31e13f91 R08: 0000000000000004 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fae31fe6038 R14: 00007fae31fe5fa0 R15: 00007fff25639728 CPU: 1 PID: 8839 Comm: syz.1.1171 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:148 Code: cc cc cc cc cc cc cc f3 0f 1e fa 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 66 90 0f 00 2d c3 f4 38 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 66 0f 1f 00 55 41 57 41 56 RSP: 0018:ffffc9000b7e7738 EFLAGS: 000002d3 RAX: ffffffff813a23aa RBX: 0000000000000003 RCX: ffff88803041da00 RDX: 0000000000000000 RSI: ffffffff8aaabce0 RDI: ffffffff8afc6f40 RBP: ffffc9000b7e7810 R08: ffffffff90da961f R09: 1ffffffff21b52c3 R10: dffffc0000000000 R11: fffffbfff21b52c4 R12: dffffc0000000000 R13: 0000000000000200 R14: 0000000000000003 R15: 1ffff920016fceec FS: 00007fae313fe6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae313fdf98 CR3: 0000000019ed3000 CR4: 00000000003506e0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:108 [inline] kvm_wait+0x22f/0x290 arch/x86/kernel/kvm.c:1058 pv_wait arch/x86/include/asm/paravirt.h:598 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x61a/0x9d0 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x24e/0x2c0 kernel/locking/spinlock_debug.c:115 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x6a/0x100 net/core/sock.c:3538 lock_sock include/net/sock.h:1767 [inline] tipc_sendstream+0x47/0x70 net/tipc/socket.c:1550 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x5bf/0x950 net/socket.c:2595 ___sys_sendmsg+0x220/0x290 net/socket.c:2649 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2687 [inline] __se_sys_sendmsg+0x1a5/0x270 net/socket.c:2685 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fae31d8f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fae313fe038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fae31fe6090 RCX: 00007fae31d8f749 RDX: 0000000000008010 RSI: 0000200000000240 RDI: 0000000000000004 RBP: 00007fae31e13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fae31fe6128 R14: 00007fae31fe6090 R15: 00007fff25639728 report is corrupted, running repro again 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}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program crashed: INFO: rcu detected stall in corrupted report is corrupted, running repro again testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program crashed: INFO: rcu detected stall in corrupted report is corrupted, running repro again testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$tipc-setsockopt$sock_attach_bpf-sendmsg$tipc detailed listing: executing program 0: socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_attach_bpf(r0, 0x1, 0x21, &(0x7f00000001c0), 0x4) (async) sendmsg$tipc(r1, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20004004}, 0x8010) (rerun: 64) program crashed: INFO: rcu detected stall in corrupted final repro crashed as (corrupted=true): rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=a6e4/1/0x4000000000000000 softirq=16125/16143 fqs=34 rcu: (t=10500 jiffies g=15569 q=1362 ncpus=2) rcu: rcu_preempt kthread timer wakeup didn't happen for 10426 jiffies! g15569 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=4985 rcu: rcu_preempt kthread starved for 10427 jiffies! g15569 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:I stack:27304 pid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5380 [inline] __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699 schedule+0xbd/0x170 kernel/sched/core.c:6773 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7080 Comm: syz.0.442 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:148 Code: cc cc cc cc cc cc cc f3 0f 1e fa 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 66 90 0f 00 2d c3 f4 38 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 66 0f 1f 00 55 41 57 41 56 RSP: 0018:ffffc9000466f8f8 EFLAGS: 000002d3 RAX: ffffffff813a23aa RBX: 0000000000000003 RCX: ffff888023725a00 RDX: 0000000000000000 RSI: ffffffff8aaabce0 RDI: ffffffff8afc6f40 RBP: ffffc9000466f9d0 R08: ffffffff90da9617 R09: 1ffffffff21b52c2 R10: dffffc0000000000 R11: fffffbfff21b52c3 R12: dffffc0000000000 R13: 0000000000000200 R14: 0000000000000003 R15: 1ffff920008cdf24 FS: 000055558c708500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f271dfb42f8 CR3: 000000005f96c000 CR4: 00000000003506e0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:108 [inline] kvm_wait+0x22f/0x290 arch/x86/kernel/kvm.c:1058 pv_wait arch/x86/include/asm/paravirt.h:598 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x61a/0x9d0 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x24e/0x2c0 kernel/locking/spinlock_debug.c:115 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x6a/0x100 net/core/sock.c:3538 lock_sock include/net/sock.h:1767 [inline] tipc_release+0xb9/0x2140 net/tipc/socket.c:640 __sock_release net/socket.c:659 [inline] sock_close+0xbd/0x230 net/socket.c:1421 __fput+0x234/0x970 fs/file_table.c:384 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f4a8398f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc161ec4a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f4a83be7da0 RCX: 00007f4a8398f749 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f4a83be7da0 R08: 0000000000000000 R09: 00000003161ec79f R10: 00007f4a83be7cb0 R11: 0000000000000246 R12: 00000000000318be R13: 00007f4a83be6090 R14: ffffffffffffffff R15: 00007ffc161ec5c0 CPU: 0 PID: 7082 Comm: syz.0.442 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:lock_acquire+0x1f2/0x410 kernel/locking/lockdep.c:5758 Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f5 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00 RSP: 0018:ffffc900044a6500 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 70eb10c81ec14e00 RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f40 RBP: ffffc900044a6610 R08: dffffc0000000000 R09: 1ffffffff21b52c2 R10: dffffc0000000000 R11: fffffbfff21b52c3 R12: 1ffff92000894cac R13: ffffc900044a6bd0 R14: 0000000000000246 R15: dffffc0000000000 FS: 00007f4a848046c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f271eb156c0 CR3: 000000005f96c000 CR4: 00000000003506f0 Call Trace: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] tipc_skb_peek_port net/tipc/msg.h:1225 [inline] tipc_sk_rcv+0x23c/0x2b80 net/tipc/socket.c:2494 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x29e/0x3b0 net/tipc/node.c:1783 tipc_sk_rcv+0x261b/0x2b80 net/tipc/socket.c:2504 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_sk_push_backlog net/tipc/socket.c:1317 [inline] tipc_sk_filter_connect net/tipc/socket.c:2258 [inline] tipc_sk_filter_rcv+0x1280/0x3030 net/tipc/socket.c:2367 tipc_sk_enqueue net/tipc/socket.c:2448 [inline] tipc_sk_rcv+0x8a6/0x2b80 net/tipc/socket.c:2500 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x29e/0x3b0 net/tipc/node.c:1783 tipc_sk_backlog_rcv+0x1a2/0x230 net/tipc/socket.c:2415 sk_backlog_rcv include/net/sock.h:1129 [inline] __release_sock+0x1e5/0x460 net/core/sock.c:3011 release_sock+0x5f/0x1c0 net/core/sock.c:3550 sk_setsockopt+0x1d02/0x29d0 net/core/sock.c:-1 do_sock_setsockopt+0x11b/0x1a0 net/socket.c:2318 __sys_setsockopt net/socket.c:2345 [inline] __do_sys_setsockopt net/socket.c:2354 [inline] __se_sys_setsockopt net/socket.c:2351 [inline] __x64_sys_setsockopt+0x184/0x200 net/socket.c:2351 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f4a8398f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4a84804038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f4a83be5fa0 RCX: 00007f4a8398f749 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f4a83a13f91 R08: 0000000000000004 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4a83be6038 R14: 00007f4a83be5fa0 R15: 00007ffc161ec348