Oops: general protection fault, probably for non-canonical address 0xdffffc00000000dd: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000006e8-0x00000000000006ef] CPU: 0 UID: 0 PID: 6018 Comm: syz.3.85 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026 RIP: 0010:ucsi_acpi_probe+0x84/0x560 drivers/usb/typec/ucsi/ucsi_acpi.c:199 Code: 84 db 74 09 e8 9d 17 08 fa 49 8d 6d f0 e8 94 17 08 fa 48 8d bd ec 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ea RSP: 0018:ffffc9000541fb20 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005941000 RDX: 00000000000000dd RSI: ffffffff8804057c RDI: 00000000000006ec RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d379000 R13: 0000000000000000 R14: ffff88801d379430 R15: ffff88801d379070 FS: 00007ff704d9d6c0(0000) GS:ffff888123b59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3331d8 CR3: 0000000021766000 CR4: 00000000003526f0 Call Trace: platform_probe+0x106/0x1d0 drivers/base/platform.c:1507 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x210/0x460 drivers/base/dd.c:868 device_driver_attach+0xd1/0x220 drivers/base/dd.c:1203 bind_store+0xf4/0x190 drivers/base/bus.c:267 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff703f9e159 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:00007ff704d9d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff704225fa0 RCX: 00007ff703f9e159 RDX: 0000000000000007 RSI: 0000200000000600 RDI: 0000000000000005 RBP: 00007ff70403503b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff704226038 R14: 00007ff704225fa0 R15: 00007fffc1911078 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ucsi_acpi_probe+0x84/0x560 drivers/usb/typec/ucsi/ucsi_acpi.c:199 Code: 84 db 74 09 e8 9d 17 08 fa 49 8d 6d f0 e8 94 17 08 fa 48 8d bd ec 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ea RSP: 0018:ffffc9000541fb20 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005941000 RDX: 00000000000000dd RSI: ffffffff8804057c RDI: 00000000000006ec RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d379000 R13: 0000000000000000 R14: ffff88801d379430 R15: ffff88801d379070 FS: 00007ff704d9d6c0(0000) GS:ffff888123b59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3331d8 CR3: 0000000021766000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 84 db test %bl,%bl 2: 74 09 je 0xd 4: e8 9d 17 08 fa call 0xfa0817a6 9: 49 8d 6d f0 lea -0x10(%r13),%rbp d: e8 94 17 08 fa call 0xfa0817a6 12: 48 8d bd ec 06 00 00 lea 0x6ec(%rbp),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 48 89 f8 mov %rdi,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 ea test %ebp,%edx