From: Petr Tesarik <ptesarik@xxxxxxxx> commit 6dacd79d28842ff01f18b4900d897741aac5999e upstream. Fix the condition to exclude the elfcorehdr segment from the SHA digest calculation. The j iterator is an index into the output sha_regions[] array, not into the input image->segment[] array. Once it reaches image->elfcorehdr_index, all subsequent segments are excluded. Besides, if the purgatory segment precedes the elfcorehdr segment, the elfcorehdr may be wrongly included in the calculation. Link: https://lkml.kernel.org/r/20240805150750.170739-1-petr.tesarik@xxxxxxxx Fixes: f7cc804a9fd4 ("kexec: exclude elfcorehdr from the segment digest") Signed-off-by: Petr Tesarik <ptesarik@xxxxxxxx> Acked-by: Baoquan He <bhe@xxxxxxxxxx> Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx> Cc: Hari Bathini <hbathini@xxxxxxxxxxxxx> Cc: Sourabh Jain <sourabhjain@xxxxxxxxxxxxx> Cc: Eric DeVolder <eric_devolder@xxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/kexec_file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -728,7 +728,7 @@ static int kexec_calculate_store_digests #ifdef CONFIG_CRASH_HOTPLUG /* Exclude elfcorehdr segment to allow future changes via hotplug */ - if (j == image->elfcorehdr_index) + if (i == image->elfcorehdr_index) continue; #endif Patches currently in stable-queue which might be from ptesarik@xxxxxxxx are queue-6.6/kexec_file-fix-elfcorehdr-digest-exclusion-when-config_crash_hotplug-y.patch
