BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 1e6a70067 P4D 1e6a70067 PUD 1e6a73067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 731 Comm: syz-executor.3 Not tainted 5.4.274-syzkaller-00016-gdd432c37afcd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff8881f6e09d78 EFLAGS: 00010202 RAX: ffffffff8154d7aa RBX: 0000000000000102 RCX: ffff8881e5e75e80 RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881ebdb71c0 RBP: ffff8881f6e09f28 R08: ffffffff8154d3ee R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff96f8 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ebdb71c0 FS: 00007fb19d5a46c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001e82cc000 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 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1086 do_softirq+0x121/0x160 kernel/softirq.c:337 __local_bh_enable_ip+0x6a/0x70 kernel/softirq.c:189 rcu_read_unlock_bh include/linux/rcupdate.h:739 [inline] __dev_queue_xmit+0x1444/0x27e0 net/core/dev.c:3829 __bpf_tx_skb net/core/filter.c:2063 [inline] __bpf_redirect_no_mac net/core/filter.c:2097 [inline] __bpf_redirect+0x78f/0xe20 net/core/filter.c:2120 ____bpf_clone_redirect net/core/filter.c:2151 [inline] bpf_clone_redirect+0x249/0x350 net/core/filter.c:2123 bpf_prog_973cd02a7a0e8181+0x376/0x1000 bpf_call_func include/linux/filter.h:627 [inline] bpf_test_run+0x2ae/0x6c0 net/bpf/test_run.c:44 bpf_prog_test_run_skb+0x73c/0xf00 net/bpf/test_run.c:311 bpf_prog_test_run kernel/bpf/syscall.c:2124 [inline] __do_sys_bpf kernel/bpf/syscall.c:2909 [inline] __se_sys_bpf+0x2e37/0xbcb0 kernel/bpf/syscall.c:2849 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7fb19e229f69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb19d5a40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb19e360f80 RCX: 00007fb19e229f69 RDX: 000000000000002c RSI: 0000000020000080 RDI: 000000000000000a RBP: 00007fb19e2876fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fb19e360f80 R15: 00007fff5f0f0528 Modules linked in: CR2: 0000000000000000 ---[ end trace 7ddb4ba0b6004997 ]--- RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff8881f6e09d78 EFLAGS: 00010202 RAX: ffffffff8154d7aa RBX: 0000000000000102 RCX: ffff8881e5e75e80 RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881ebdb71c0 RBP: ffff8881f6e09f28 R08: ffffffff8154d3ee R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff96f8 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ebdb71c0 FS: 00007fb19d5a46c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001e82cc000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600