clang/objtool failures on linux-next

[Arnd Bergmann]

I came across two randconfig builds on linux-next that fail to build:

==> build/x86/0xCE0DD5F4_defconfig/log <==
drivers/input/misc/uinput.o: warning: objtool: uinput_str_to_user+0x165: undefined stack state
drivers/input/misc/uinput.o: warning: objtool: uinput_str_to_user+0x165: unknown CFA base reg -1

==> build/x86/0xAE77DEF6_defconfig/log <==
drivers/scsi/qla2xxx/qla_dbg.o: error: SIGSEGV: objtool stack overflow!
Segmentation fault

The first one happens with clang-18 through clang-22, the second one
with all versions of clang.

The crash seems worse at first, but I also noticed that
clang takes a long time to actually compile it, and the object
file is huge, so this is probably partially a compiler problem.

Please have a look at the attached object files along the configs
I used.

      Arnd

Attachment: 0xAE77DEF6_qla_dbg.o.xz
Description: application/xz

Attachment: 0xAE77DEF6_defconfig.xz
Description: application/xz

Attachment: 0xCE0DD5F4_uinput.o.xz
Description: application/xz

Attachment: 0xCE0DD5F4_defconfig.xz
Description: application/xz