BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 1d544a067 P4D 1d544a067 PUD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 842 Comm: syz.2.118 Not tainted 5.4.290-syzkaller-00002-g41adfeb3d639 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010206 RAX: ffffffff8154e8ca RBX: 0000000000000100 RCX: ffff8881f30ecec0 RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e13df1c0 RBP: ffff8881f6e09ec8 R08: ffffffff8154e50e R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9cd0 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e13df1c0 FS: 00007f5d00b196c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001ee56f000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: call_timer_fn+0x36/0x390 kernel/time/timer.c:1448 expire_timers kernel/time/timer.c:1493 [inline] __run_timers+0x879/0xbe0 kernel/time/timer.c:1817 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x195/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:539 [inline] smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:btf_check_meta kernel/bpf/btf.c:2963 [inline] RIP: 0010:btf_check_all_metas kernel/bpf/btf.c:2987 [inline] RIP: 0010:btf_parse_type_sec+0x2df/0x1d90 kernel/bpf/btf.c:3123 Code: 08 48 89 df e8 22 cb 1c 00 41 83 c6 f4 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 4c 8b 24 24 74 08 48 89 df e8 01 cb 1c 00 <4c> 89 e7 4c 89 fe 44 89 f2 ff 13 89 c3 31 ff 89 c6 e8 ab e3 ec ff RSP: 0018:ffff8881f48e7720 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff0be8bb4 RBX: ffffffff85f45da0 RCX: 0000000000000002 RDX: ffffc90002146000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffff8881f48e7890 R08: ffffffff817769d5 R09: ffffffff822a3f6b R10: ffff8881f30ecec0 R11: 0000000000000003 R12: ffff8881ef2e2000 R13: dffffc0000000000 R14: 000000000000001c R15: ffff8881f1ed6998 btf_parse kernel/bpf/btf.c:3356 [inline] btf_new_fd+0xa79/0x10e0 kernel/bpf/btf.c:3416 bpf_btf_load kernel/bpf/syscall.c:2705 [inline] __do_sys_bpf kernel/bpf/syscall.c:2936 [inline] __se_sys_bpf+0x13de/0xbcb0 kernel/bpf/syscall.c:2849 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f5d024d0169 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:00007f5d00b19038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f5d026e9080 RCX: 00007f5d024d0169 RDX: 0000000000000028 RSI: 0000200000000340 RDI: 0000000000000012 RBP: 00007f5d025512a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5d026e9080 R15: 00007ffeec350798 Modules linked in: CR2: 0000000000000000 ---[ end trace 0f65be958fc46242 ]--- RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010206 RAX: ffffffff8154e8ca RBX: 0000000000000100 RCX: ffff8881f30ecec0 RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e13df1c0 RBP: ffff8881f6e09ec8 R08: ffffffff8154e50e R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9cd0 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e13df1c0 FS: 00007f5d00b196c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001ee56f000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 08 48 89 or %cl,-0x77(%rax) 3: df e8 fucomip %st(0),%st 5: 22 cb and %bl,%cl 7: 1c 00 sbb $0x0,%al 9: 41 83 c6 f4 add $0xfffffff4,%r14d d: 48 8b 1b mov (%rbx),%rbx 10: 48 89 d8 mov %rbx,%rax 13: 48 c1 e8 03 shr $0x3,%rax 17: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 1c: 4c 8b 24 24 mov (%rsp),%r12 20: 74 08 je 0x2a 22: 48 89 df mov %rbx,%rdi 25: e8 01 cb 1c 00 call 0x1ccb2b * 2a: 4c 89 e7 mov %r12,%rdi <-- trapping instruction 2d: 4c 89 fe mov %r15,%rsi 30: 44 89 f2 mov %r14d,%edx 33: ff 13 call *(%rbx) 35: 89 c3 mov %eax,%ebx 37: 31 ff xor %edi,%edi 39: 89 c6 mov %eax,%esi 3b: e8 ab e3 ec ff call 0xffece3eb