BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 1d7daf067 P4D 1d7daf067 PUD 1d7db2067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1687 Comm: syz.1.446 Not tainted 5.4.276-syzkaller-00021-g58de09405d1e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202 RAX: ffffffff8154d48a RBX: 0000000000000102 RCX: ffff8881eabf4ec0 RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881d813f1c0 RBP: ffff8881f6e09ec8 R08: ffffffff8154d0ce R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9d98 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881d813f1c0 FS: 00007fba925796c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001dd7ff000 CR4: 00000000003406b0 DR0: 0000000020000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 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/0x460 arch/x86/kernel/apic/apic.c:1149 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:186 Code: 00 00 00 0f 1f 00 be 0c 00 00 00 48 c7 c7 a0 a7 f1 85 e8 4f de 2f 00 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 04 24 <65> 48 8b 0d 74 54 9e 7e 65 8b 15 79 54 9e 7e f7 c2 00 01 1f 00 74 RSP: 0018:ffff8881d7e4f700 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: ffffffff818a8883 RBX: 000000000023ffff RCX: 0000000000040000 RDX: ffff8881eabf4ec0 RSI: 000000000023ffff RDI: 00000000001ddcc4 RBP: ffff8881d7e4f901 R08: ffffffff818a8875 R09: fffff94000eee619 R10: 0000000000000000 R11: dffffc0000000001 R12: 80000001ddcc4007 R13: 00000000001ddcc4 R14: 00007fba925d6000 R15: ffff8881efbbfa68 vm_normal_page+0x93/0x1d0 mm/memory.c:657 copy_one_pte mm/memory.c:802 [inline] copy_pte_range mm/memory.c:855 [inline] copy_pmd_range mm/memory.c:906 [inline] copy_pud_range mm/memory.c:940 [inline] copy_p4d_range mm/memory.c:962 [inline] copy_page_range+0x100f/0x26f0 mm/memory.c:1024 dup_mmap kernel/fork.c:608 [inline] dup_mm kernel/fork.c:1379 [inline] copy_mm+0xb23/0x10d0 kernel/fork.c:1435 copy_process+0x1291/0x3230 kernel/fork.c:2052 _do_fork+0x197/0x900 kernel/fork.c:2399 __do_sys_clone kernel/fork.c:2557 [inline] __se_sys_clone kernel/fork.c:2538 [inline] __x64_sys_clone+0x26b/0x2c0 kernel/fork.c:2538 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7fba932f7f19 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:00007fba92578ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fba93485f60 RCX: 00007fba932f7f19 RDX: 0000000000000000 RSI: 0000000000000060 RDI: 0000000081280000 RBP: 00007fba93366bcd R08: ffffffffff600000 R09: ffffffffff600000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007fba93485f60 R15: 00007fffa3132b88 Modules linked in: CR2: 0000000000000000 ---[ end trace 642f1b52f7b13deb ]--- RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202 RAX: ffffffff8154d48a RBX: 0000000000000102 RCX: ffff8881eabf4ec0 RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881d813f1c0 RBP: ffff8881f6e09ec8 R08: ffffffff8154d0ce R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9d98 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881d813f1c0 FS: 00007fba925796c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001dd7ff000 CR4: 00000000003406b0 DR0: 0000000020000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 0f 1f 00 nopl (%rax) 5: be 0c 00 00 00 mov $0xc,%esi a: 48 c7 c7 a0 a7 f1 85 mov $0xffffffff85f1a7a0,%rdi 11: e8 4f de 2f 00 call 0x2fde65 16: c3 ret 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 48 8b 04 24 mov (%rsp),%rax * 29: 65 48 8b 0d 74 54 9e mov %gs:0x7e9e5474(%rip),%rcx # 0x7e9e54a5 <-- trapping instruction 30: 7e 31: 65 8b 15 79 54 9e 7e mov %gs:0x7e9e5479(%rip),%edx # 0x7e9e54b1 38: f7 c2 00 01 1f 00 test $0x1f0100,%edx 3e: 74 .byte 0x74