BUG: unable to handle page fault for address: ffffffff8361eafb #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 580f067 P4D 580f067 PUD 5810063 PMD 36001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 1 PID: 17071 Comm: syz-executor.3 Not tainted 5.4.197-syzkaller-00009-g2bf0b614f0fb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:__hlist_del include/linux/list.h:773 [inline] RIP: 0010:detach_timer kernel/time/timer.c:824 [inline] RIP: 0010:expire_timers+0x155/0x400 kernel/time/timer.c:1452 Code: 1f 3b 00 4d 89 3e 4d 85 ff 74 2a e8 15 b6 0e 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 bb 1f 3b 00 <4d> 89 37 eb 0b 66 0f 1f 44 00 00 e8 eb b5 0e 00 4d 89 ef 42 80 7c RSP: 0018:ffff8881f6f09dd8 EFLAGS: 00010046 RAX: 1ffffffff06c3d5f RBX: ffff8881e60cb1c0 RCX: ffff8881e4600fc0 RDX: 0000000000000103 RSI: ffff8881e60cb1c0 RDI: 0000000000000000 RBP: 1ffff1103cc19639 R08: ffffffff81519c11 R09: ffffed103ede92f7 R10: ffffed103ede92f7 R11: 1ffff1103ede92f6 R12: ffff8881e60cb1c8 R13: dffffc0000000000 R14: ffff8881f6f09ec0 R15: ffffffff8361eafb FS: 00007f737db16700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8361eafb CR3: 00000001eece5000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __run_timers+0x5b0/0x6b0 kernel/time/timer.c:1787 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800 __do_softirq+0x23e/0x643 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1083 do_softirq+0xdc/0x110 kernel/softirq.c:337 __local_bh_enable_ip+0x6a/0x70 kernel/softirq.c:189 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline] __dev_queue_xmit+0x1593/0x2840 net/core/dev.c:3816 __bpf_tx_skb net/core/filter.c:2063 [inline] __bpf_redirect_no_mac net/core/filter.c:2088 [inline] __bpf_redirect+0x6f2/0xcc0 net/core/filter.c:2111 ____bpf_clone_redirect net/core/filter.c:2142 [inline] bpf_clone_redirect+0x243/0x350 net/core/filter.c:2114 bpf_prog_6493cbec178e154d+0x61a/0x1000 bpf_call_func include/linux/filter.h:623 [inline] bpf_test_run+0x260/0x640 net/bpf/test_run.c:44 bpf_prog_test_run_skb+0x7a2/0xf00 net/bpf/test_run.c:310 bpf_prog_test_run kernel/bpf/syscall.c:2124 [inline] __do_sys_bpf kernel/bpf/syscall.c:2907 [inline] __se_sys_bpf+0x2b7b/0xb990 kernel/bpf/syscall.c:2847 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f737e9a0279 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f737db16168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f737eab2f80 RCX: 00007f737e9a0279 RDX: 0000000000000028 RSI: 0000000020000140 RDI: 000000000000000a RBP: 00007f737e9fa189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd5578123f R14: 00007f737db16300 R15: 0000000000022000 Modules linked in: CR2: ffffffff8361eafb ---[ end trace 6ebed53368263cd4 ]--- RIP: 0010:__hlist_del include/linux/list.h:773 [inline] RIP: 0010:detach_timer kernel/time/timer.c:824 [inline] RIP: 0010:expire_timers+0x155/0x400 kernel/time/timer.c:1452 Code: 1f 3b 00 4d 89 3e 4d 85 ff 74 2a e8 15 b6 0e 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 bb 1f 3b 00 <4d> 89 37 eb 0b 66 0f 1f 44 00 00 e8 eb b5 0e 00 4d 89 ef 42 80 7c RSP: 0018:ffff8881f6f09dd8 EFLAGS: 00010046 RAX: 1ffffffff06c3d5f RBX: ffff8881e60cb1c0 RCX: ffff8881e4600fc0 RDX: 0000000000000103 RSI: ffff8881e60cb1c0 RDI: 0000000000000000 RBP: 1ffff1103cc19639 R08: ffffffff81519c11 R09: ffffed103ede92f7 R10: ffffed103ede92f7 R11: 1ffff1103ede92f6 R12: ffff8881e60cb1c8 R13: dffffc0000000000 R14: ffff8881f6f09ec0 R15: ffffffff8361eafb FS: 00007f737db16700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8361eafb CR3: 00000001eece5000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 3b 00 cmp (%rax),%eax 2: 4d 89 3e mov %r15,(%r14) 5: 4d 85 ff test %r15,%r15 8: 74 2a je 0x34 a: e8 15 b6 0e 00 callq 0xeb624 f: 49 83 c7 08 add $0x8,%r15 13: 4c 89 f8 mov %r15,%rax 16: 48 c1 e8 03 shr $0x3,%rax 1a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 1f: 74 08 je 0x29 21: 4c 89 ff mov %r15,%rdi 24: e8 bb 1f 3b 00 callq 0x3b1fe4 * 29: 4d 89 37 mov %r14,(%r15) <-- trapping instruction 2c: eb 0b jmp 0x39 2e: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 34: e8 eb b5 0e 00 callq 0xeb624 39: 4d 89 ef mov %r13,%r15 3c: 42 rex.X 3d: 80 .byte 0x80 3e: 7c .byte 0x7c