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: 5929 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:ucsi_acpi_probe+0x84/0x560 drivers/usb/typec/ucsi/ucsi_acpi.c:199 Code: 84 db 74 09 e8 bd 90 09 fa 49 8d 6d f0 e8 b4 90 09 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:ffffc90004f87b00 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 00000000000000dd RSI: ffffffff8801d11c RDI: 00000000000006ec RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888022c55000 R13: 0000000000000000 R14: ffff888022c55430 R15: ffff888022c55070 FS: 0000000000000000(0000) GS:ffff888096a60000(0063) knlGS:0000000056cd1480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7133200 CR3: 0000000021d2a000 CR4: 0000000000352ef0 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_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf6feefec Code: Unable to access opcode bytes at 0xf6feefc2. RSP: 002b:00000000ff88838c EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000080000600 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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 bd 90 09 fa 49 8d 6d f0 e8 b4 90 09 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:ffffc90004f87b00 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 00000000000000dd RSI: ffffffff8801d11c RDI: 00000000000006ec RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888022c55000 R13: 0000000000000000 R14: ffff888022c55430 R15: ffff888022c55070 FS: 0000000000000000(0000) GS:ffff888096a60000(0063) knlGS:0000000056cd1480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f6fef000 CR3: 0000000021d2a000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 84 db test %bl,%bl 2: 74 09 je 0xd 4: e8 bd 90 09 fa call 0xfa0990c6 9: 49 8d 6d f0 lea -0x10(%r13),%rbp d: e8 b4 90 09 fa call 0xfa0990c6 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