Extracting prog: 2m11.98230644s Minimizing prog: 24m10.929309432s Simplifying prog options: 0s Extracting C: 47.68132953s Simplifying C: 16m10.000173304s 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: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}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300005050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000000008000300640000000c000700e80300ffffffffff", 0x68, 0x0, 0x0, 0x0) program crashed: BUG: soft lockup in gate_timer_func single: successfully extracted reproducer found reproducer with 2 syscalls minimizing guilty program 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: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}}): socket$netlink detailed listing: executing program 0: socket$netlink(0x10, 0x3, 0x0) program did not crash 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: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}}): sendto detailed listing: executing program 0: sendto(0xffffffffffffffff, &(0x7f0000000000)="68000000300005050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000000008000300640000000c000700e80300ffffffffff", 0x68, 0x0, 0x0, 0x0) program did not crash 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: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}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, 0x0, 0x0, 0x0, 0x0, 0x0) program did not crash 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: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}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000), 0x0, 0x0, 0x0, 0x0) program did not crash extracting C reproducer testing compiled C 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: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}}): socket$netlink-sendto program crashed: BUG: soft lockup in gate_timer_func simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C 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}}): socket$netlink-sendto program crashed: BUG: soft lockup in gate_timer_func testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false 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}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C 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:false 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}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in gate_timer_func testing compiled C 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:false VhciInjection:false 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}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C 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:false VhciInjection:true Wifi:true IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore testing compiled C 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:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in gate_timer_func testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: BUG: soft lockup in __hrtimer_run_queues a never seen crash title: BUG: soft lockup in __hrtimer_run_queues, ignore 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:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300005050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000000008000300640000000c000700e80300ffffffffff", 0x68, 0x0, 0x0, 0x0) program crashed: BUG: soft lockup in __hrtimer_run_queues validation run: crashed=true 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:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300005050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000000008000300640000000c000700e80300ffffffffff", 0x68, 0x0, 0x0, 0x0) program crashed: BUG: soft lockup in __hrtimer_run_queues validation run: crashed=true 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:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300005050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000000008000300640000000c000700e80300ffffffffff", 0x68, 0x0, 0x0, 0x0) program crashed: BUG: soft lockup in gate_timer_func validation run: crashed=true reproducing took 46m32.979914901s repro crashed as (corrupted=false): watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor:4723] Modules linked in: irq event stamp: 33138499 hardirqs last enabled at (33138498): [] seqcount_lockdep_reader_access+0x7c/0xf8 include/linux/seqlock.h:75 hardirqs last disabled at (33138499): [] __el1_irq arch/arm64/kernel/entry-common.c:527 [inline] hardirqs last disabled at (33138499): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:543 softirqs last enabled at (363270): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (363270): [] release_sock+0x150/0x228 net/core/sock.c:3869 softirqs last disabled at (363273): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 1 UID: 0 PID: 4723 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : seqcount_lockdep_reader_access+0xd8/0xf8 include/linux/seqlock.h:76 lr : seqcount_lockdep_reader_access+0xd4/0xf8 include/linux/seqlock.h:75 sp : ffff80008eb77ce0 x29: ffff80008eb77ce0 x28: 1fffe00034bbc63a x27: ffff80008e853110 x26: dfff800000000000 x25: ffff0000c831ac80 x24: 1fffe0001aaa7526 x23: dfff800000000000 x22: ffff0000c831acb0 x21: 0000000000000000 x20: ffff8000805580e8 x19: 00000000000000c0 x18: 00000000ffffffff x17: ffff80008199aec4 x16: ffff80008199b124 x15: ffff80008199c72c x14: 000000008030dda8 x13: 0000000000000001 x12: ffff0000d456d7c0 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 0000000000000101 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080557cd4 x2 : 0000000000000080 x1 : ffff0000d456d7c0 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) seqcount_lockdep_reader_access+0xd8/0xf8 include/linux/seqlock.h:75 (P) ktime_get+0x68/0x218 kernel/time/timekeeping.c:971 gate_get_time+0x1c/0xa4 net/sched/act_gate.c:23 gate_timer_func+0x1a8/0x390 net/sched/act_gate.c:101 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x314/0xbe0 kernel/time/hrtimer.c:2096 hrtimer_run_softirq+0x15c/0x21c kernel/time/hrtimer.c:2113 handle_softirqs+0x2ec/0xd98 kernel/softirq.c:622 __do_softirq+0x14/0x20 kernel/softirq.c:656 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:885 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 invoke_softirq kernel/softirq.c:503 [inline] __irq_exit_rcu+0x1ac/0x428 kernel/softirq.c:735 irq_exit_rcu+0x14/0x84 kernel/softirq.c:752 __el1_irq arch/arm64/kernel/entry-common.c:531 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:543 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:548 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:586 __sanitizer_cov_trace_pc+0x58/0x5c kernel/kcov.c:235 (P) sock_write_iter+0x220/0x310 net/socket.c:1241 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] NMI backtrace for cpu 0 skipped: idling at arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle_call+0xd0/0xfc kernel/sched/idle.c:129 final repro crashed as (corrupted=false): watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor:4723] Modules linked in: irq event stamp: 33138499 hardirqs last enabled at (33138498): [] seqcount_lockdep_reader_access+0x7c/0xf8 include/linux/seqlock.h:75 hardirqs last disabled at (33138499): [] __el1_irq arch/arm64/kernel/entry-common.c:527 [inline] hardirqs last disabled at (33138499): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:543 softirqs last enabled at (363270): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (363270): [] release_sock+0x150/0x228 net/core/sock.c:3869 softirqs last disabled at (363273): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 1 UID: 0 PID: 4723 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : seqcount_lockdep_reader_access+0xd8/0xf8 include/linux/seqlock.h:76 lr : seqcount_lockdep_reader_access+0xd4/0xf8 include/linux/seqlock.h:75 sp : ffff80008eb77ce0 x29: ffff80008eb77ce0 x28: 1fffe00034bbc63a x27: ffff80008e853110 x26: dfff800000000000 x25: ffff0000c831ac80 x24: 1fffe0001aaa7526 x23: dfff800000000000 x22: ffff0000c831acb0 x21: 0000000000000000 x20: ffff8000805580e8 x19: 00000000000000c0 x18: 00000000ffffffff x17: ffff80008199aec4 x16: ffff80008199b124 x15: ffff80008199c72c x14: 000000008030dda8 x13: 0000000000000001 x12: ffff0000d456d7c0 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 0000000000000101 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080557cd4 x2 : 0000000000000080 x1 : ffff0000d456d7c0 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) seqcount_lockdep_reader_access+0xd8/0xf8 include/linux/seqlock.h:75 (P) ktime_get+0x68/0x218 kernel/time/timekeeping.c:971 gate_get_time+0x1c/0xa4 net/sched/act_gate.c:23 gate_timer_func+0x1a8/0x390 net/sched/act_gate.c:101 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x314/0xbe0 kernel/time/hrtimer.c:2096 hrtimer_run_softirq+0x15c/0x21c kernel/time/hrtimer.c:2113 handle_softirqs+0x2ec/0xd98 kernel/softirq.c:622 __do_softirq+0x14/0x20 kernel/softirq.c:656 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:885 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 invoke_softirq kernel/softirq.c:503 [inline] __irq_exit_rcu+0x1ac/0x428 kernel/softirq.c:735 irq_exit_rcu+0x14/0x84 kernel/softirq.c:752 __el1_irq arch/arm64/kernel/entry-common.c:531 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:543 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:548 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:586 __sanitizer_cov_trace_pc+0x58/0x5c kernel/kcov.c:235 (P) sock_write_iter+0x220/0x310 net/socket.c:1241 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] NMI backtrace for cpu 0 skipped: idling at arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle_call+0xd0/0xfc kernel/sched/idle.c:129