Oops: general protection fault, probably for non-canonical address 0xdffffc00000000dd: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000006e8-0x00000000000006ef] CPU: 1 UID: 0 PID: 5868 Comm: syz.0.12 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+0x6c/0x4b0 drivers/usb/typec/ucsi/ucsi_acpi.c:199 Code: 89 74 24 08 4c 8b 23 4c 89 e7 e8 bf 76 54 fd 49 83 c4 f0 45 31 f6 84 c0 4d 0f 45 f4 49 81 c6 ec 06 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 16 04 00 00 41 8b 2e 31 ff 89 ee e8 fb RSP: 0018:ffffc90004dbfab8 EFLAGS: 00010217 RAX: 00000000000000dd RBX: ffff88801df6f430 RCX: 0000000000080000 RDX: ffffc900042d9000 RSI: 0000000000000355 RDI: 0000000000000356 RBP: 0000000000000000 R08: ffff88802c1f1c33 R09: 1ffff1100583e386 R10: dffffc0000000000 R11: ffffffff87eb25d0 R12: fffffffffffffff0 R13: dffffc0000000000 R14: 00000000000006ec R15: 1ffff11003bede86 FS: 00007fc89c6346c0(0000) GS:ffff888124dd1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3fcaea CR3: 000000007501d000 CR4: 0000000000350ef0 Call Trace: platform_probe+0xf9/0x190 drivers/base/platform.c:1507 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1203 bind_store+0x1d0/0x220 drivers/base/bus.c:267 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x612/0xba0 fs/read_write.c:687 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: 0033:0x7fc89b79e159 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:00007fc89c634028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fc89ba25fa0 RCX: 00007fc89b79e159 RDX: 0000000000000007 RSI: 0000200000000600 RDI: 0000000000000005 RBP: 00007fc89b83503b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc89ba26038 R14: 00007fc89ba25fa0 R15: 00007ffc2ea8f108 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ucsi_acpi_probe+0x6c/0x4b0 drivers/usb/typec/ucsi/ucsi_acpi.c:199 Code: 89 74 24 08 4c 8b 23 4c 89 e7 e8 bf 76 54 fd 49 83 c4 f0 45 31 f6 84 c0 4d 0f 45 f4 49 81 c6 ec 06 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 16 04 00 00 41 8b 2e 31 ff 89 ee e8 fb RSP: 0018:ffffc90004dbfab8 EFLAGS: 00010217 RAX: 00000000000000dd RBX: ffff88801df6f430 RCX: 0000000000080000 RDX: ffffc900042d9000 RSI: 0000000000000355 RDI: 0000000000000356 RBP: 0000000000000000 R08: ffff88802c1f1c33 R09: 1ffff1100583e386 R10: dffffc0000000000 R11: ffffffff87eb25d0 R12: fffffffffffffff0 R13: dffffc0000000000 R14: 00000000000006ec R15: 1ffff11003bede86 FS: 00007fc89c6346c0(0000) GS:ffff888124cd1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2d725eb840 CR3: 000000007501d000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 89 74 24 08 mov %esi,0x8(%rsp) 4: 4c 8b 23 mov (%rbx),%r12 7: 4c 89 e7 mov %r12,%rdi a: e8 bf 76 54 fd call 0xfd5476ce f: 49 83 c4 f0 add $0xfffffffffffffff0,%r12 13: 45 31 f6 xor %r14d,%r14d 16: 84 c0 test %al,%al 18: 4d 0f 45 f4 cmovne %r12,%r14 1c: 49 81 c6 ec 06 00 00 add $0x6ec,%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 16 04 00 00 jne 0x44d 37: 41 8b 2e mov (%r14),%ebp 3a: 31 ff xor %edi,%edi 3c: 89 ee mov %ebp,%esi 3e: e8 .byte 0xe8 3f: fb sti