[LTP] [PATCH] ima_kexec.sh: Use %s in printf to prevent evaluating cmdline backslashes

[Petr Vorel]

Hi Avinesh,

> On systemd-boot systems, the kernel command line contains EFI paths
> with backslashes (e.g., `initrd=\opensuse...\6.19...`).

> Writing this to a file using `printf "$cmdline"` inadvertently evaluates
> these backslashes as escape sequences, corrupting the expected digest
> and causing a false test failure:

>   + printf 'initrd=\opensuse-tumbleweed\6.19.11-1-default\initrd-...'
>   + cat -v file1
>   initrd=\opensuse-tumbleweed^F.19.11-1-default\initrd-...

>   ima_kexec 1 TINFO: testing kexec -s -l /boot/Image-6.19.11-1-default --reuse-cmdline
>   ima_kexec 1 TFAIL: unable to find a correct measurement

> Fix this by using `printf "%s" "$cmdline"` to ensure the command line
> is treated as literal data.

Thanks a lot, merged!

Kind regards,
Petr