RBP: 00007ffdbcfd71ac R08: 0000000ebcfd723f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000007c R13: 00000000000927c0 R14: 000000000008e2bb R15: 00007ffdbcfd7200 watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz.2.562:8481] Modules linked in: irq event stamp: 1727284 hardirqs last enabled at (1727283): [] irqentry_exit+0x1dd/0x8c0 kernel/entry/common.c:219 hardirqs last disabled at (1727284): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (1727282): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1727282): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1727282): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 softirqs last disabled at (1727267): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1727267): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1727267): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 8481 Comm: syz.2.562 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x20 kernel/kcov.c:314 Code: bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc900047ff918 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff8880b8443020 RCX: ffffffff81b27a51 RDX: ffff8880312d8000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8880312d8b30 R12: dffffc0000000000 R13: ffffed1017088605 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881249f6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31101ff8 CR3: 000000005c3df000 CR4: 0000000000350ef0 Call Trace: csd_lock_wait kernel/smp.c:342 [inline] smp_call_function_many_cond+0xe21/0x15e0 kernel/smp.c:877 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1043 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1382 [inline] flush_tlb_mm_range+0x2f0/0x12c0 arch/x86/mm/tlb.c:1472 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:490 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:480 [inline] tlb_flush_mmu mm/mmu_gather.c:403 [inline] tlb_finish_mmu+0x3c9/0x7c0 mm/mmu_gather.c:497 exit_mmap+0x3f9/0xb60 mm/mmap.c:1290 __mmput+0x12a/0x410 kernel/fork.c:1173 mmput+0x62/0x70 kernel/fork.c:1196 exit_mm kernel/exit.c:581 [inline] do_exit+0x7d7/0x2bd0 kernel/exit.c:959 do_group_exit+0xd3/0x2a0 kernel/exit.c:1112 __do_sys_exit_group kernel/exit.c:1123 [inline] __se_sys_exit_group kernel/exit.c:1121 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1121 x64_sys_call+0x151c/0x1740 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd0db18f749 Code: Unable to access opcode bytes at 0x7fd0db18f71f. RSP: 002b:00007ffdbcfd7148 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd0db18f749 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffdbcfd71ac R08: 0000000ebcfd723f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000007c R13: 00000000000927c0 R14: 000000000008e2bb R15: 00007ffdbcfd7200 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 8475 Comm: syz.0.559 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:num_possible_cpus include/linux/cpumask.h:1222 [inline] RIP: 0010:mm_get_cid kernel/sched/sched.h:3759 [inline] RIP: 0010:sched_mm_cid_fork+0x4fc/0xcc0 kernel/sched/core.c:10578 Code: ff df 49 c1 ef 03 4c 01 f8 48 89 04 24 eb 5d 49 c7 c4 74 96 d7 8d 41 83 e4 07 41 83 c4 03 f3 90 48 8b 04 24 0f b6 00 41 38 c4 <7c> 08 84 c0 0f 85 60 06 00 00 8b 35 08 40 4b 0c 48 89 df 49 89 f7 RSP: 0018:ffffc9000479fd50 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff88807ca848d0 RCX: 1ffff1100f9507c9 RDX: 0000000000000002 RSI: 0000000000000002 RDI: ffff88807ca848d0 RBP: ffff888028e08000 R08: 0000000000000000 R09: fffff520008f3f9c R10: 0000000000000003 R11: ffff888028e08b30 R12: 0000000000000007 R13: ffff88807ca83ec0 R14: 0000000000000002 R15: 0000000000000002 FS: 00007f4f604b36c0(0000) GS:ffff8881248f6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b347f5ff8 CR3: 0000000025822000 CR4: 0000000000350ef0 Call Trace: bprm_execve fs/exec.c:1776 [inline] bprm_execve+0x4ff/0x1620 fs/exec.c:1729 do_execveat_common.isra.0+0x4a5/0x610 fs/exec.c:1859 do_execveat fs/exec.c:1944 [inline] __do_sys_execveat fs/exec.c:2018 [inline] __se_sys_execveat fs/exec.c:2012 [inline] __x64_sys_execveat+0xda/0x120 fs/exec.c:2012 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4f5f58f749 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:00007f4f604b3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 RAX: ffffffffffffffda RBX: 00007f4f5f7e5fa0 RCX: 00007f4f5f58f749 RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000004 RBP: 00007f4f5f613f91 R08: 0000000000001000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4f5f7e6038 R14: 00007f4f5f7e5fa0 R15: 00007fffcdf2ca68