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cmd: pxe_utils: sysboot: fix crash if either board or soc are not set.

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If the environment does not have "soc" or "board" set, and fdtdir
option is specified in extlinux.conf, the bootloader will crash whilst
dereferencing a null pointer. Add a guard against null soc or
board. Fixes a crash of qemu-riscv64_smode configuration, which does
not have CONFIG_SYS_SOC defined.

Signed-off-by: Dimitri John Ledkov <xnox@ubuntu.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Dimitri John Ledkov 2021-04-21 12:42:01 +01:00 committed by Ramon Fried
parent 82a3c9ef20
commit 75efe7dc99
1 changed files with 8 additions and 0 deletions
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8
cmd/pxe_utils.c
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@ -587,6 +587,14 @@ static int label_boot(struct cmd_tbl *cmdtp, struct pxe_label *label)
f2 = "-";
f3 = env_get("board");
f4 = ".dtb";
if (!f1) {
f1 = "";
f2 = "";
}
if (!f3) {
f2 = "";
f3 = "";
}
}
len = strlen(label->fdtdir);