kcov: kcov_start: t = ffff888027555dc0, size = 524288, area = ffffc9000e031000 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000065: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000328-0x000000000000032f] CPU: 1 UID: 0 PID: 8321 Comm: syz.3.1023 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:wacom_intuos_irq+0x3273/0x3350 drivers/hid/wacom_wac.c:1044 Code: f1 ff ff 48 8b 7c 24 38 e8 4a 83 05 f9 e9 2e f1 ff ff 49 81 c6 28 03 00 00 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 f7 e8 4f 83 05 f9 49 8b 1e 48 b8 00 00 00 RSP: 0018:ffffc9000372f8f0 EFLAGS: 00010206 RAX: 0000000000000065 RBX: 1ffff1100febde29 RCX: dffffc0000000000 RDX: ffffffff8934d3f6 RSI: ffffffff904f1200 RDI: 0000000000000055 RBP: 0000000000000055 R08: ffff888027555dc0 R09: 0000000000000007 R10: 0000000000000011 R11: 0000000000000002 R12: ffff8880258c80ae R13: 1ffff1100febde40 R14: 0000000000000328 R15: 1ffff11004b19015 FS: 00007f1a7a8296c0(0000) GS:ffff88812472e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f844a4ee420 CR3: 0000000074b1c000 CR4: 00000000003526f0 Call Trace: wacom_wac_irq+0x102d/0x9b90 drivers/hid/wacom_wac.c:3510 wacom_raw_event+0x9d2/0xd10 drivers/hid/wacom_sys.c:183 __hid_input_report+0x41c/0x580 drivers/hid/hid-core.c:2175 uhid_dev_input2+0xbc/0x150 drivers/hid/uhid.c:609 uhid_char_write+0x49c/0xc90 drivers/hid/uhid.c:767 vfs_write+0x296/0xba0 fs/read_write.c:685 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1a7999e159 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:00007f1a7a829028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1a79c26090 RCX: 00007f1a7999e159 RDX: 000000000000000b RSI: 0000200000000240 RDI: 0000000000000003 RBP: 00007f1a79a3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1a79c26128 R14: 00007f1a79c26090 R15: 00007ffef71be4e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:wacom_intuos_irq+0x3273/0x3350 drivers/hid/wacom_wac.c:1044 Code: f1 ff ff 48 8b 7c 24 38 e8 4a 83 05 f9 e9 2e f1 ff ff 49 81 c6 28 03 00 00 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 f7 e8 4f 83 05 f9 49 8b 1e 48 b8 00 00 00 RSP: 0018:ffffc9000372f8f0 EFLAGS: 00010206 RAX: 0000000000000065 RBX: 1ffff1100febde29 RCX: dffffc0000000000 RDX: ffffffff8934d3f6 RSI: ffffffff904f1200 RDI: 0000000000000055 RBP: 0000000000000055 R08: ffff888027555dc0 R09: 0000000000000007 R10: 0000000000000011 R11: 0000000000000002 R12: ffff8880258c80ae R13: 1ffff1100febde40 R14: 0000000000000328 R15: 1ffff11004b19015 FS: 00007f1a7a8296c0(0000) GS:ffff88812472e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f844a4ee420 CR3: 0000000074b1c000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 48 8b 7c 24 38 mov 0x38(%rsp),%rdi 5: e8 4a 83 05 f9 call 0xf9058354 a: e9 2e f1 ff ff jmp 0xfffff13d f: 49 81 c6 28 03 00 00 add $0x328,%r14 16: 4c 89 f0 mov %r14,%rax 19: 48 c1 e8 03 shr $0x3,%rax 1d: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 24: fc ff df * 27: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2b: 74 08 je 0x35 2d: 4c 89 f7 mov %r14,%rdi 30: e8 4f 83 05 f9 call 0xf9058384 35: 49 8b 1e mov (%r14),%rbx 38: 48 rex.W 39: b8 .byte 0xb8 3a: 00 00 add %al,(%rax)