kthread+0x346/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.5.111:752] Modules linked in: CPU: 1 PID: 752 Comm: syz.5.111 Not tainted 5.10.236-syzkaller-00012-gab07aeb2c93d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline] RIP: 0010:smp_call_function_single+0x1f5/0x470 kernel/smp.c:517 Code: 48 44 89 f6 83 e6 01 31 ff e8 d7 6e 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 12 6b 0a 00 e9 a9 00 00 00 f3 90 44 24 48 01 00 00 00 0f 84 94 00 00 00 e8 f8 6a 0a 00 eb e9 e8 RSP: 0018:ffffc9000135f240 EFLAGS: 00000293 RAX: ffffffff815921b8 RBX: 0000000000000000 RCX: ffff88810f0fa780 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000135f330 R08: dffffc0000000000 R09: ffffed103ee0aec9 R10: ffffed103ee0aec9 R11: 1ffff1103ee0aec8 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff9200026be4c FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200001000000 CR3: 000000000620f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many_cond+0x8f2/0x9e0 kernel/smp.c:653 smp_call_function_many kernel/smp.c:716 [inline] smp_call_function kernel/smp.c:738 [inline] on_each_cpu+0xab/0x170 kernel/smp.c:837 text_poke_sync arch/x86/kernel/alternative.c:1318 [inline] text_poke_bp_batch+0x1b3/0x4a0 arch/x86/kernel/alternative.c:1509 text_poke_bp+0xc8/0x140 arch/x86/kernel/alternative.c:1723 __static_call_transform+0x188/0x280 arch/x86/kernel/static_call.c:57 arch_static_call_transform+0x7e/0x1d0 arch/x86/kernel/static_call.c:101 __static_call_update+0xef/0x5c0 kernel/static_call.c:136 tracepoint_update_call kernel/tracepoint.c:338 [inline] tracepoint_remove_func kernel/tracepoint.c:462 [inline] tracepoint_probe_unregister+0x8be/0x950 kernel/tracepoint.c:572 bpf_probe_unregister+0x61/0x70 kernel/trace/bpf_trace.c:2135 bpf_raw_tp_link_release+0x63/0x90 kernel/bpf/syscall.c:2759 bpf_link_free kernel/bpf/syscall.c:2348 [inline] bpf_link_put+0x1f6/0x280 kernel/bpf/syscall.c:2374 bpf_link_release+0x3b/0x40 kernel/bpf/syscall.c:2382 __fput+0x2fb/0x770 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xa27/0x2470 kernel/exit.c:863 do_group_exit+0x141/0x310 kernel/exit.c:985 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f87651da969 Code: Unable to access opcode bytes at RIP 0x7f87651da93f. RSP: 002b:00007f8763801038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 0000000000000068 RBX: 00007f8765402160 RCX: 00007f87651da969 RDX: 0000000000000000 RSI: 0000200000006280 RDI: 000000000000000b RBP: 00007f876525cab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8765402160 R15: 00007ffe1a0efdc8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 709 Comm: syz.6.103 Not tainted 5.10.236-syzkaller-00012-gab07aeb2c93d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:84 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x75/0x290 mm/kasan/generic.c:189 Code: 00 fc ff df 4f 8d 0c 03 48 8d 5c 37 ff 48 c1 eb 03 4e 8d 14 3b 4d 89 d6 4d 29 ce 49 83 fe 10 7f 26 4d 85 f6 0f 84 39 01 00 00 <48> f7 d3 4c 01 db 41 80 39 00 0f 85 c2 01 00 00 49 ff c1 48 ff c3 RSP: 0018:ffffc90000be7988 EFLAGS: 00000002 RAX: 0000000000000001 RBX: 1ffff9200017cf3c RCX: ffffffff847465f0 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000be79e0 RBP: ffffc90000be79a0 R08: dffffc0000000000 R09: fffff5200017cf3c R10: fffff5200017cf3d R11: 1ffff9200017cf3c R12: 1ffff9200017cf38 R13: dffffc0000000000 R14: 0000000000000001 R15: dffffc0000000001 FS: 00007f608141d6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000c5f030 CR3: 000000011c1d8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:706 [inline] queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] do_raw_spin_lock_flags include/linux/spinlock.h:195 [inline] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irqsave+0xb0/0x110 kernel/locking/spinlock.c:159 vga_put drivers/gpu/vga/vgaarb.c:578 [inline] vga_arb_release+0x20e/0x930 drivers/gpu/vga/vgaarb.c:1370 __fput+0x2fb/0x770 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 get_signal+0x125a/0x12e0 kernel/signal.c:2566 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f6082db4969 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:00007f608141d038 EFLAGS: 00000246 ORIG_RAX: 000000000000010f RAX: 0000000000000001 RBX: 00007f6082fdbfa0 RCX: 00007f6082db4969 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000200000000080 RBP: 00007f6082e36ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6082fdbfa0 R15: 00007ffc863877a8