BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 0 P4D 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3808 Comm: syz-executor Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff8881f6e09cf0 EFLAGS: 00010206 RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881f36c8fc0 RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881c2c331c0 RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 00000000ffffb3e0 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881c2c331c0 FS: 000055558f476500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001eb957000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448 expire_timers kernel/time/timer.c:1493 [inline] __run_timers+0x81d/0xb60 kernel/time/timer.c:1817 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830 __do_softirq+0x236/0x660 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x197/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:539 [inline] smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:__vmalloc_area_node mm/vmalloc.c:2445 [inline] RIP: 0010:__vmalloc_node_range+0x3b6/0x6e0 mm/vmalloc.c:2499 Code: 4e 8d 24 ed 00 00 00 00 4c 03 23 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 da e2 04 00 <4d> 89 34 24 49 bc 00 00 00 00 00 fc ff df 48 8b 45 b8 42 0f b6 04 RSP: 0018:ffff8881da507ad0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff920000a901e RBX: ffff8881df0555a0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: ffff8881da507b58 R08: dffffc0000000000 R09: ffffed103e48f92e R10: ffffed103e48f92e R11: 1ffff1103e48f92d R12: ffffc900005480f0 R13: 000000000000041e R14: ffffea000734c3c0 R15: 0000000000000000 vmalloc_user+0x73/0x80 mm/vmalloc.c:2629 kcov_mmap+0x2b/0x120 kernel/kcov.c:450 call_mmap include/linux/fs.h:1996 [inline] mmap_region+0x101b/0x15a0 mm/mmap.c:1812 do_mmap+0x826/0xd90 mm/mmap.c:1581 do_mmap_pgoff include/linux/mm.h:2480 [inline] vm_mmap_pgoff+0x195/0x230 mm/util.c:528 ksys_mmap_pgoff+0x16f/0x1e0 mm/mmap.c:1631 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:97 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:88 [inline] __x64_sys_mmap+0xfa/0x110 arch/x86/kernel/sys_x86_64.c:88 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f0e5af2d9a3 Code: f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 89 ca 41 f7 c1 ff 0f 00 00 75 14 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 25 c3 0f 1f 40 00 48 c7 c0 a8 ff ff ff 64 c7 RSP: 002b:00007fff37bcf178 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f0e5b154f40 RCX: 00007f0e5af2d9a3 RDX: 0000000000000003 RSI: 0000000000800000 RDI: 00007f0e59598000 RBP: 00007f0e5b155738 R08: 00000000000000d7 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000008 R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000 Modules linked in: CR2: 0000000000000000 ---[ end trace f36a3f02b3db5707 ]--- RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff8881f6e09cf0 EFLAGS: 00010206 RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881f36c8fc0 RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881c2c331c0 RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 00000000ffffb3e0 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881c2c331c0 FS: 000055558f476500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001eb957000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 4e 8d 24 ed 00 00 00 lea 0x0(,%r13,8),%r12 7: 00 8: 4c 03 23 add (%rbx),%r12 b: 4c 89 e0 mov %r12,%rax e: 48 c1 e8 03 shr $0x3,%rax 12: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 19: fc ff df 1c: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 20: 74 08 je 0x2a 22: 4c 89 e7 mov %r12,%rdi 25: e8 da e2 04 00 call 0x4e304 * 2a: 4d 89 34 24 mov %r14,(%r12) <-- trapping instruction 2e: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 35: fc ff df 38: 48 8b 45 b8 mov -0x48(%rbp),%rax 3c: 42 rex.X 3d: 0f .byte 0xf 3e: b6 04 mov $0x4,%dh