watchdog: BUG: soft lockup - CPU#0 stuck for 138s! [syz.1.263:6720] Modules linked in: irq event stamp: 39708893 hardirqs last enabled at (39708892): [] note_gp_changes+0x237/0x300 kernel/rcu/tree.c:1326 hardirqs last disabled at (39708893): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (39708884): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (39708884): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (39708884): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (39708887): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (39708887): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (39708887): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6720 Comm: syz.1.263 Not tainted 6.16.0-rc4-syzkaller-gbf4807c89d8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data kernel/kcov.c:246 [inline] RIP: 0010:__sanitizer_cov_trace_switch+0xa0/0x130 kernel/kcov.c:351 Code: 8b 04 25 08 10 a0 92 45 31 c9 eb 08 49 ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 65 44 8b 1d 79 ab df 10 41 81 e3 00 01 ff 00 74 13 <41> 81 fb 00 01 00 00 75 d9 41 83 b8 3c 16 00 00 00 74 cf 45 8b 98 RSP: 0018:ffffc900000073c8 EFLAGS: 00000206 RAX: 0000000000000020 RBX: ffff88801a4872b8 RCX: 0000000000000005 RDX: ffffffff81c42980 RSI: ffffffff8e194fd0 RDI: 0000000000000004 RBP: 0000003dfa324fb8 R08: ffff88807b66da00 R09: 0000000000000012 R10: 0000000000000012 R11: 0000000000000100 R12: ffff88801a487010 R13: 0000000000000004 R14: 0000000000034fe4 R15: 00000000000002a8 FS: 000055559431d500(0000) GS:ffff888125c1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000002000 CR3: 000000007fd3a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rb_read_data_buffer+0x110/0x580 kernel/trace/ring_buffer.c:1820 check_buffer+0x28a/0x750 kernel/trace/ring_buffer.c:4296 __rb_reserve_next+0x592/0xdb0 kernel/trace/ring_buffer.c:4395 rb_reserve_next_event kernel/trace/ring_buffer.c:4532 [inline] ring_buffer_lock_reserve+0xbb5/0x1010 kernel/trace/ring_buffer.c:4591 __trace_buffer_lock_reserve kernel/trace/trace.c:1090 [inline] trace_event_buffer_lock_reserve+0x1d0/0x6f0 kernel/trace/trace.c:2837 trace_event_buffer_reserve+0x248/0x340 kernel/trace/trace_events.c:672 do_trace_event_raw_event_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline] trace_event_raw_event_bpf_trace_printk+0x100/0x260 kernel/trace/bpf_trace.h:11 __do_trace_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline] trace_bpf_trace_printk+0x170/0x1d0 kernel/trace/bpf_trace.h:11 ____bpf_trace_printk kernel/trace/bpf_trace.c:380 [inline] bpf_trace_printk+0x11e/0x190 kernel/trace/bpf_trace.c:363 bpf_prog_9e1c00255e17e72e+0x39/0x3f bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2258 [inline] bpf_trace_run1+0x27c/0x4b0 kernel/trace/bpf_trace.c:2298 __bpf_trace_rcu_utilization+0xa1/0xf0 include/trace/events/rcu.h:27 __do_trace_rcu_utilization include/trace/events/rcu.h:27 [inline] trace_rcu_utilization+0x1ad/0x1d0 include/trace/events/rcu.h:27 rcu_core+0x1336/0x1710 kernel/rcu/tree.c:2840 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 72 35 f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc9001c4b7c20 EFLAGS: 00000206 RAX: 11b332eb14ff4e00 RBX: 1ffff92003896f8c RCX: 11b332eb14ff4e00 RDX: 0000000000000006 RSI: ffffffff8d996a93 RDI: ffffffff8be28f40 RBP: ffffc9001c4b7d10 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8e1442a0 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 dput+0x197/0x2b0 fs/dcache.c:910 __fput+0x68e/0xa70 fs/file_table.c:473 task_work_run+0x1d1/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc62458e929 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:00007ffd77fa1a58 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fc6247b7ba0 RCX: 00007fc62458e929 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fc6247b7ba0 R08: 0000000000020fd4 R09: 0000001b77fa1d4f R10: 00007fc6247b7ac0 R11: 0000000000000246 R12: 000000000001f2d8 R13: 00007ffd77fa1b50 R14: ffffffffffffffff R15: 00007ffd77fa1b70 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6732 Comm: syz.3.265 Not tainted 6.16.0-rc4-syzkaller-gbf4807c89d8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:122 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:431 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x6a6/0xb60 kernel/locking/qspinlock.c:325 Code: 8b 44 24 40 42 0f b6 04 30 84 c0 0f 85 42 01 00 00 c6 07 00 43 0f b6 04 37 84 c0 0f 85 60 01 00 00 c6 01 01 41 be 00 80 ff ff <66> c7 84 24 90 00 00 00 00 01 48 b8 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc9000ca87980 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffff888148c428c0 RCX: 1ffff11029188518 RDX: ffffc9000ec61000 RSI: 0000000000009767 RDI: ffff8880b873af14 RBP: ffffc9000ca87a98 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 1ffffffff1bf52b8 R13: 0000000000000000 R14: 00000000ffffedfd R15: 1ffff11029188518 FS: 00007f8b1c2776c0(0000) GS:ffff888125d1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8b1c276f98 CR3: 0000000032b6e000 CR4: 00000000003526f0 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline] queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116 spin_lock include/linux/spinlock.h:351 [inline] d_instantiate+0x64/0xa0 fs/dcache.c:1946 alloc_path_pseudo fs/file_table.c:364 [inline] alloc_file_pseudo+0xf6/0x210 fs/file_table.c:376 __anon_inode_getfile fs/anon_inodes.c:153 [inline] __anon_inode_getfd fs/anon_inodes.c:278 [inline] anon_inode_getfd+0xca/0x1b0 fs/anon_inodes.c:313 map_create+0xdb6/0x1150 kernel/bpf/syscall.c:1541 __sys_bpf+0x67e/0x860 kernel/bpf/syscall.c:5818 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline] __se_sys_bpf kernel/bpf/syscall.c:5941 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5941 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8b1b38e929 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:00007f8b1c277038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f8b1b5b6080 RCX: 00007f8b1b38e929 RDX: 0000000000000050 RSI: 0000200000000280 RDI: 0000000000000000 RBP: 00007f8b1b410b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f8b1b5b6080 R15: 00007ffc1bf17ff8