Re: [PATCH] fireinfo: Fix SEGV in detect_hypervisor()

["Peter Müller" <peter.mueller@ipfire.org>]

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Acked-by: Peter Müller <peter.mueller(a)ipfire.org>

> Fixes: #13155 - _fireinfo.detect_hypervisor() rises Segmentation fault
> Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>
> ---
>  lfs/fireinfo                                  |  1 +
>  ...-one-error-when-detecting-hypervisor.patch | 38 +++++++++++++++++++
>  2 files changed, 39 insertions(+)
>  create mode 100644 src/patches/fireinfo-virt-fix-off-by-one-error-when-detecting-hypervisor.patch
> 
> diff --git a/lfs/fireinfo b/lfs/fireinfo
> index 8b38885d6..629626d1e 100644
> --- a/lfs/fireinfo
> +++ b/lfs/fireinfo
> @@ -75,6 +75,7 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
>  	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/fireinfo/fireinfo-2.2.0-python-3.8.patch
>  	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/fireinfo/fireinfo-system-blacklist-jetways-product-uuid.patch
>  	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/fireinfo/fireinfo-system-ignore-when-the-serial-number-is-ssn.patch
> +	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/fireinfo-virt-fix-off-by-one-error-when-detecting-hypervisor.patch
>  
>  	cd $(DIR_APP) && [ -x "configure" ] || sh ./autogen.sh
>  	cd $(DIR_APP) && ./configure --prefix=/usr
> diff --git a/src/patches/fireinfo-virt-fix-off-by-one-error-when-detecting-hypervisor.patch b/src/patches/fireinfo-virt-fix-off-by-one-error-when-detecting-hypervisor.patch
> new file mode 100644
> index 000000000..0799ecce5
> --- /dev/null
> +++ b/src/patches/fireinfo-virt-fix-off-by-one-error-when-detecting-hypervisor.patch
> @@ -0,0 +1,38 @@
> +From e3e68b9baa9723916b1999394432e9ad260cfaa2 Mon Sep 17 00:00:00 2001
> +From: Michael Tremer <michael.tremer(a)ipfire.org>
> +Date: Sat, 1 Jul 2023 09:08:48 +0000
> +Subject: [PATCH] virt: Fix off-by-one error when detecting hypervisor
> +
> +Reported-by: Mauro Condarelli <mc5686(a)mclink.it>
> +Fixes: #13155 - _fireinfo.detect_hypervisor() rises Segmentation fault
> +Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>
> +---
> + src/_fireinfo/fireinfo.c | 4 ++--
> + 1 file changed, 2 insertions(+), 2 deletions(-)
> +
> +diff --git a/src/_fireinfo/fireinfo.c b/src/_fireinfo/fireinfo.c
> +index 1d3f424..18edf34 100644
> +--- a/src/_fireinfo/fireinfo.c
> ++++ b/src/_fireinfo/fireinfo.c
> +@@ -32,8 +32,8 @@ enum hypervisors {
> + 	HYPER_KVM,
> + 	HYPER_MSHV,
> + 	HYPER_VMWARE,
> ++	// Must always be last
> + 	HYPER_OTHER,
> +-	HYPER_LAST /* for loop - must be last*/
> + };
> + 
> + const char *hypervisor_ids[] = {
> +@@ -157,7 +157,7 @@ int detect_hypervisor(int *hypervisor) {
> + 		*hypervisor = HYPER_OTHER;
> + 
> + 		if (*sig.text) {
> +-			for (int id = HYPER_NONE + 1; id < HYPER_LAST; id++) {
> ++			for (int id = HYPER_NONE + 1; id < HYPER_OTHER; id++) {
> + 				if (strcmp(hypervisor_ids[id], sig.text) == 0) {
> + 					*hypervisor = id;
> + 					break;
> +-- 
> +2.39.2
> +