RBP: 0000200000000140 R08: 00007f3cc2b76ee0 R09: 0000000000004000 R10: 0000000000004000 R11: 0000000000000246 R12: 00002000000005c0 R13: 00007f3cc2b76ea0 R14: 00000000000005d8 R15: 0000200000000740 watchdog: BUG: soft lockup - CPU#0 stuck for 244s! [syz.5.3370:20486] Modules linked in: irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x288a/0x7ff0 kernel/fork.c:2232 softirqs last enabled at (0): [] copy_process+0x28de/0x7ff0 kernel/fork.c:2233 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 0 UID: 0 PID: 20486 Comm: syz.5.3370 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x58e/0x16c0 kernel/smp.c:892 Code: 00 fc ff df 48 8b 54 24 08 49 89 d5 49 89 d4 49 c1 ed 03 41 83 e4 07 49 01 c5 41 83 c4 03 e8 a9 81 0c 00 f3 90 41 0f b6 45 00 <41> 38 c4 7c 08 84 c0 0f 85 2c 0f 00 00 8b 45 08 31 ff 83 e0 01 41 RSP: 0018:ffffc9000446f2f8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81fcb23d RDX: ffff888060e41f00 RSI: ffffffff81fcb217 RDI: ffff888060e41f00 RBP: ffff8880b85411c0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 000000000000caf2 R12: 0000000000000003 R13: ffffed10170a8239 R14: 0000000000000001 R15: ffff8880b843c840 FS: 0000000000000000(0000) GS:ffff888124360000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000f000 CR3: 0000000025958000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057 __flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x45f/0x16f0 arch/x86/mm/tlb.c:1451 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:509 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:499 [inline] zap_pte_range mm/memory.c:1961 [inline] zap_pmd_range mm/memory.c:2020 [inline] zap_pud_range mm/memory.c:2048 [inline] zap_p4d_range mm/memory.c:2069 [inline] __zap_vma_range+0x23c8/0x4a30 mm/memory.c:2109 unmap_vmas+0x299/0x5f0 mm/memory.c:2178 exit_mmap+0x1ef/0xa00 mm/mmap.c:1300 __mmput+0x12a/0x410 kernel/fork.c:1181 mmput+0x67/0x80 kernel/fork.c:1204 exit_mm kernel/exit.c:610 [inline] do_exit+0x8b1/0x2ae0 kernel/exit.c:992 do_group_exit+0xd5/0x2a0 kernel/exit.c:1147 get_signal+0x1ec7/0x21e0 kernel/signal.c:3038 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop+0x139/0x6f0 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x666/0x870 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3cc1d9e0ca Code: Unable to access opcode bytes at 0x7f3cc1d9e0a0. RSP: 002b:00007f3cc2b76e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: 0000000000000000 RBX: 00007f3cc2b76ee0 RCX: 00007f3cc1d9e0ca RDX: 0000200000000140 RSI: 00002000000005c0 RDI: 00007f3cc2b76ea0 RBP: 0000200000000140 R08: 00007f3cc2b76ee0 R09: 0000000000004000 R10: 0000000000004000 R11: 0000000000000246 R12: 00002000000005c0 R13: 00007f3cc2b76ea0 R14: 00000000000005d8 R15: 0000200000000740 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 20520 Comm: syz.3.3378 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:get_current arch/x86/include/asm/current.h:23 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xf/0x70 kernel/kcov.c:216 Code: 00 00 00 5b e9 a2 9c f0 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 65 cc 02 12 48 8b 34 24 <65> 48 8b 15 41 cc 02 12 a9 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 RSP: 0018:ffffc90000a08e90 EFLAGS: 00000086 RAX: 0000000080010000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000010001 RSI: ffffffff81f4f985 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed10170a5080 R10: ffff8880b8528403 R11: 0000000000000000 R12: ffff88802f97b300 R13: ffffffff899cc020 R14: ffff8880b8528540 R15: ffff8880b8528590 FS: 00007fc5e4bf66c0(0000) GS:ffff888124460000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5e4bf5ff8 CR3: 000000004d010000 CR4: 0000000000350ef0 Call Trace: trace_hrtimer_expire_entry include/trace/events/timer.h:261 [inline] __run_hrtimer kernel/time/hrtimer.c:2029 [inline] __hrtimer_run_queues+0x385/0x9c0 kernel/time/hrtimer.c:2096 hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2215 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline] __sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:unix_skb_to_scm net/unix/af_unix.c:2005 [inline] RIP: 0010:__unix_dgram_recvmsg+0x4d9/0xc30 net/unix/af_unix.c:2638 Code: 85 12 05 00 00 e8 b7 c6 d5 f7 ba 20 00 00 00 31 f6 48 8d 84 24 c8 00 00 00 48 89 c7 48 89 44 24 40 e8 4b d0 42 f8 49 8d 7f 28 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f RSP: 0018:ffffc900035a7870 EFLAGS: 00000202 RAX: ffffc900035a7938 RBX: ffff88807ad95d80 RCX: 0000000000000000 RDX: 0000000000000020 RSI: 0000000000000000 RDI: ffff888057685528 RBP: 0000000000000002 R08: 0000000000000001 R09: ffffc900035a7938 R10: ffffc900035a7957 R11: 0000000000000000 R12: ffff88807ad96310 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888057685500 unix_dgram_recvmsg+0xcd/0x100 net/unix/af_unix.c:2686 sock_recvmsg_nosec net/socket.c:1126 [inline] ____sys_recvmsg+0x5b3/0x640 net/socket.c:2902 ___sys_recvmsg+0x16a/0x1a0 net/socket.c:2946 do_recvmmsg+0x2f3/0x740 net/socket.c:3041 __sys_recvmmsg net/socket.c:3115 [inline] __do_sys_recvmmsg net/socket.c:3138 [inline] __se_sys_recvmmsg net/socket.c:3131 [inline] __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3131 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc5e699ce59 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:00007fc5e4bf6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fc5e6c16090 RCX: 00007fc5e699ce59 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007fc5e6a32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc5e6c16128 R14: 00007fc5e6c16090 R15: 00007ffe96ce9ba8