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: 5142 Comm: syz.2.668 Not tainted 6.1.132-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:mcp_i2c_xfer+0x5a/0x430 drivers/hid/hid-mcp2221.c:309
Code: 00 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 1a 9f c3 f9 4c 8b 33 4d 89 f4 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 04 00 74 08 4c 89 f7 e8 f7 9e c3 f9 49 8b 1e 48 8d ab a8
RSP: 0018:ffffc90005d07898 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880798621d8 RCX: ffff88802df1bb80
RDX: 0000000000000000 RSI: ffffc90005d07b00 RDI: ffff888079862030
RBP: dffffc0000000000 R08: ffffffff870aab7f R09: ffffed100f30c4ba
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffc90005d07b00
FS: 000055556b5fc500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000012c0 CR3: 0000000027455000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__i2c_transfer+0x850/0x2380 drivers/i2c/i2c-core-base.c:-1
i2c_transfer+0x261/0x3a0 drivers/i2c/i2c-core-base.c:2333
i2c_transfer_buffer_flags+0x17c/0x260 drivers/i2c/i2c-core-base.c:2361
i2c_master_send include/linux/i2c.h:110 [inline]
i2cdev_write+0x88/0x130 drivers/i2c/i2c-dev.c:175
do_loop_readv_writev fs/read_write.c:-1 [inline]
do_iter_write+0x503/0xc40 fs/read_write.c:863
vfs_writev fs/read_write.c:934 [inline]
do_writev+0x27b/0x460 fs/read_write.c:977
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa59518d169
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:00007ffe40407c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fa5953a5fa0 RCX: 00007fa59518d169
RDX: 0000000000000001 RSI: 00002000000012c0 RDI: 0000000000000005
RBP: 00007fa59520e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa5953a5fa0 R14: 00007fa5953a5fa0 R15: 0000000000000003
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mcp_i2c_xfer+0x5a/0x430 drivers/hid/hid-mcp2221.c:309
Code: 00 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 1a 9f c3 f9 4c 8b 33 4d 89 f4 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 04 00 74 08 4c 89 f7 e8 f7 9e c3 f9 49 8b 1e 48 8d ab a8
RSP: 0018:ffffc90005d07898 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880798621d8 RCX: ffff88802df1bb80
RDX: 0000000000000000 RSI: ffffc90005d07b00 RDI: ffff888079862030
RBP: dffffc0000000000 R08: ffffffff870aab7f R09: ffffed100f30c4ba
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffc90005d07b00
FS: 000055556b5fc500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb3c3e4aea0 CR3: 0000000027455000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 48 89 add %cl,-0x77(%rax)
3: d8 48 c1 fmuls -0x3f(%rax)
6: e8 03 80 3c 28 call 0x283c800e
b: 00 74 08 48 add %dh,0x48(%rax,%rcx,1)
f: 89 df mov %ebx,%edi
11: e8 1a 9f c3 f9 call 0xf9c39f30
16: 4c 8b 33 mov (%rbx),%r14
19: 4d 89 f4 mov %r14,%r12
1c: 49 c1 ec 03 shr $0x3,%r12
20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
27: fc ff df
* 2a: 41 80 3c 04 00 cmpb $0x0,(%r12,%rax,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 f7 mov %r14,%rdi
34: e8 f7 9e c3 f9 call 0xf9c39f30
39: 49 8b 1e mov (%r14),%rbx
3c: 48 rex.W
3d: 8d .byte 0x8d
3e: ab stos %eax,%es:(%rdi)
3f: a8 .byte 0xa8