Re: [PATCH v3] ARM: imx: Fix suspend/resume crash with Clang CFI
Yo'av Moshe <[email protected]>
| Newsgroups | dev.linux.lists.imx,dev.linux.lists.llvm,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel,org.kernel.vger.stable |
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| Message-ID | <[email protected]> |
On 2026-07-21 8:09 PM, Nathan Chancellor wrote:
> Does using SYM_TYPED_FUNC_START for imx6_suspend() make that work?
> Something like this builds fine for me and I see
> __kcfi_typeid_imx6_suspend generated by Clang.
Hi Nathan,
Thanks for the suggestion!
Unfortunately my physical board died, so I couldn't test this on hardware.
However, I gave your patch a try under QEMU emulation (with CONFIG_CFI=y
and copying the 4-byte hash into OCRAM before fncpy), and it still
triggered a CFI panic when suspending:
__und_svc_finish from imx6q_suspend_finish+0x78/0xd0
It seems like the hash generated for assembly doesn't match what the C code
expects at the call site.
Best regards,
Yo'av