general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 11765 Comm: syz.1.1351 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:mcp_i2c_xfer+0x58/0x420 drivers/hid/hid-mcp2221.c:343 Code: 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 99 59 55 fa 48 8b 1b 48 89 d8 48 c1 e8 03 4d 89 f4 48 89 04 24 <42> 80 3c 30 00 74 08 48 89 df e8 79 59 55 fa 4c 8b 33 4d 8d ae 78 RSP: 0018:ffffc90003c4f990 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc90005cc9000 RSI: 000000000000005b RDI: 000000000000005c RBP: 0000000000000001 R08: ffff8880527ba69f R09: 1ffff1100a4f74d3 R10: dffffc0000000000 R11: ffffed100a4f74d4 R12: dffffc0000000000 R13: 1ffff1100a4f742b R14: dffffc0000000000 R15: ffffc90003c4fc20 FS: 00007f6eb22316c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3f3d3e CR3: 0000000060961000 CR4: 00000000003506f0 Call Trace: __i2c_transfer+0x880/0x20b0 drivers/i2c/i2c-core-base.c:-1 i2c_transfer+0x25d/0x3a0 drivers/i2c/i2c-core-base.c:2330 i2c_transfer_buffer_flags+0x10a/0x1a0 drivers/i2c/i2c-core-base.c:2358 i2c_master_send include/linux/i2c.h:109 [inline] i2cdev_write+0x87/0x120 drivers/i2c/i2c-dev.c:175 vfs_write+0x30b/0xd60 fs/read_write.c:592 ksys_write+0x152/0x260 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f6eb3fd7e59 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:00007f6eb2231028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f6eb4250fa0 RCX: 00007f6eb3fd7e59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f6eb406dd6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6eb4251038 R14: 00007f6eb4250fa0 R15: 00007fffa2c7b088 Modules linked in: ---[ end trace 2c83461e5c40dcbe ]--- RIP: 0010:mcp_i2c_xfer+0x58/0x420 drivers/hid/hid-mcp2221.c:343 Code: 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 99 59 55 fa 48 8b 1b 48 89 d8 48 c1 e8 03 4d 89 f4 48 89 04 24 <42> 80 3c 30 00 74 08 48 89 df e8 79 59 55 fa 4c 8b 33 4d 8d ae 78 RSP: 0018:ffffc90003c4f990 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc90005cc9000 RSI: 000000000000005b RDI: 000000000000005c RBP: 0000000000000001 R08: ffff8880527ba69f R09: 1ffff1100a4f74d3 R10: dffffc0000000000 R11: ffffed100a4f74d4 R12: dffffc0000000000 R13: 1ffff1100a4f742b R14: dffffc0000000000 R15: ffffc90003c4fc20 FS: 00007f6eb22316c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3ecdfe92f8 CR3: 0000000060961000 CR4: 00000000003506e0 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 48 89 add %cl,-0x77(%rax) 5: d8 48 c1 fmuls -0x3f(%rax) 8: e8 03 42 80 3c call 0x3c804210 d: 30 00 xor %al,(%rax) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 99 59 55 fa call 0xfa5559b2 19: 48 8b 1b mov (%rbx),%rbx 1c: 48 89 d8 mov %rbx,%rax 1f: 48 c1 e8 03 shr $0x3,%rax 23: 4d 89 f4 mov %r14,%r12 26: 48 89 04 24 mov %rax,(%rsp) * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 79 59 55 fa call 0xfa5559b2 39: 4c 8b 33 mov (%rbx),%r14 3c: 4d rex.WRB 3d: 8d .byte 0x8d 3e: ae scas %es:(%rdi),%al 3f: 78 .byte 0x78