Oops: general protection fault, probably for non-canonical address 0xdffffc000000010e: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000870-0x0000000000000877] CPU: 1 UID: 0 PID: 5818 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:do_jit+0x7c8c/0x12a90 arch/x86/net/bpf_jit_comp.c:2806 Code: 49 83 c4 44 4c 89 e0 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 0a 84 00 00 45 03 34 24 48 8b bc 24 a0 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 10 00 74 17 e8 49 30 b0 00 48 8b bc 24 a0 01 00 00 48 ba 00 RSP: 0018:ffffc900038cf640 EFLAGS: 00010202 RAX: 000000000000010e RBX: 000000000000001c RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000870 RBP: ffffc900038cfa00 R08: ffff88816bb0d940 R09: 0000000000000096 R10: 00000000000000fb R11: 0000000000000000 R12: ffff8881749b8044 R13: ffff88816c445450 R14: 0000000000000003 R15: 0000000000000000 FS: 00007f06814986c0(0000) GS:ffff8882a9224000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0680472780 CR3: 000000001cfc8000 CR4: 00000000000006f0 Call Trace: bpf_int_jit_compile+0x8af/0x1620 arch/x86/net/bpf_jit_comp.c:3946 bpf_prog_jit_compile kernel/bpf/core.c:2571 [inline] __bpf_prog_select_runtime+0x4e2/0xb20 kernel/bpf/core.c:2640 bpf_migrate_filter net/core/filter.c:1318 [inline] bpf_prepare_filter+0x10ef/0x1280 net/core/filter.c:1366 sk_attach_filter+0x24/0x140 net/core/filter.c:1550 tun_attach_filter+0x176/0x280 drivers/net/tun.c:2992 __tun_chr_ioctl+0x15f1/0x1e10 drivers/net/tun.c:3344 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f068059ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0681498028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0680815fa0 RCX: 00007f068059ce59 RDX: 0000200000000300 RSI: 00000000401054d5 RDI: 0000000000000003 RBP: 00007f0680632e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0680816038 R14: 00007f0680815fa0 R15: 00007fff056e7c98 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_jit+0x7c8c/0x12a90 arch/x86/net/bpf_jit_comp.c:2806 Code: 49 83 c4 44 4c 89 e0 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 0a 84 00 00 45 03 34 24 48 8b bc 24 a0 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 10 00 74 17 e8 49 30 b0 00 48 8b bc 24 a0 01 00 00 48 ba 00 RSP: 0018:ffffc900038cf640 EFLAGS: 00010202 RAX: 000000000000010e RBX: 000000000000001c RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000870 RBP: ffffc900038cfa00 R08: ffff88816bb0d940 R09: 0000000000000096 R10: 00000000000000fb R11: 0000000000000000 R12: ffff8881749b8044 R13: ffff88816c445450 R14: 0000000000000003 R15: 0000000000000000 FS: 00007f06814986c0(0000) GS:ffff8882a9224000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f06805ea540 CR3: 000000001cfc8000 CR4: 00000000000006f0 ---------------- Code disassembly (best guess): 0: 49 83 c4 44 add $0x44,%r12 4: 4c 89 e0 mov %r12,%rax 7: 48 c1 e8 03 shr $0x3,%rax b: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax f: 84 c0 test %al,%al 11: 0f 85 0a 84 00 00 jne 0x8421 17: 45 03 34 24 add (%r12),%r14d 1b: 48 8b bc 24 a0 01 00 mov 0x1a0(%rsp),%rdi 22: 00 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 74 17 je 0x47 30: e8 49 30 b0 00 call 0xb0307e 35: 48 8b bc 24 a0 01 00 mov 0x1a0(%rsp),%rdi 3c: 00 3d: 48 rex.W 3e: ba .byte 0xba