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: 5952 Comm: syz.6.271 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:mcp_i2c_xfer+0x58/0x420 drivers/hid/hid-mcp2221.c:341
Code: 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 69 8e 66 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 49 8e 66 fa 4c 8b 33 4d 8d ae 70
RSP: 0018:ffffc9000308f930 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88802aca0000
RDX: 0000000000000000 RSI: ffffc9000308fbc0 RDI: ffff88807e84a030
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed100fd094d3
R10: ffffed100fd094d3 R11: 1ffff1100fd094d2 R12: dffffc0000000000
R13: 1ffff1100fd0942b R14: dffffc0000000000 R15: ffffc9000308fbc0
FS:  00007f0cb4df16c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d3e67efb8 CR3: 0000000065adb000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __i2c_transfer+0x864/0x2060 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x24c/0x390 drivers/i2c/i2c-core-base.c:2330
 i2c_transfer_buffer_flags+0x102/0x190 drivers/i2c/i2c-core-base.c:2358
 i2c_master_recv include/linux/i2c.h:79 [inline]
 i2cdev_read+0x84/0x170 drivers/i2c/i2c-dev.c:151
 do_loop_readv_writev fs/read_write.c:-1 [inline]
 do_iter_read+0x53e/0x7c0 fs/read_write.c:792
 vfs_readv fs/read_write.c:910 [inline]
 do_readv+0x237/0x3e0 fs/read_write.c:947
 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: 0033:0x7f0cb6b8a749
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0cb4df1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007f0cb6de0fa0 RCX: 00007f0cb6b8a749
RDX: 0000000000000001 RSI: 00002000000004c0 RDI: 000000000000000e
RBP: 00007f0cb6c0ef91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0cb6de1038 R14: 00007f0cb6de0fa0 R15: 00007ffedd59dd08
 </TASK>
Modules linked in:
---[ end trace 321d69597a6cf9c3 ]---
RIP: 0010:mcp_i2c_xfer+0x58/0x420 drivers/hid/hid-mcp2221.c:341
Code: 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 69 8e 66 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 49 8e 66 fa 4c 8b 33 4d 8d ae 70
RSP: 0018:ffffc9000308f930 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88802aca0000
RDX: 0000000000000000 RSI: ffffc9000308fbc0 RDI: ffff88807e84a030
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed100fd094d3
R10: ffffed100fd094d3 R11: 1ffff1100fd094d2 R12: dffffc0000000000
R13: 1ffff1100fd0942b R14: dffffc0000000000 R15: ffffc9000308fbc0
FS:  00007f0cb4df16c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055592890c950 CR3: 0000000065adb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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 69 8e 66 fa       	call   0xfa668e82
  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 49 8e 66 fa       	call   0xfa668e82
  39:	4c 8b 33             	mov    (%rbx),%r14
  3c:	4d                   	rex.WRB
  3d:	8d                   	.byte 0x8d
  3e:	ae                   	scas   %es:(%rdi),%al
  3f:	70                   	.byte 0x70