6.6-stable review patch. If anyone has any objections, please let me know.
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From: Petr Tesarik ptesarik@suse.com
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@suse.com Fixes: f7cc804a9fd4 ("kexec: exclude elfcorehdr from the segment digest") Signed-off-by: Petr Tesarik ptesarik@suse.com Acked-by: Baoquan He bhe@redhat.com Cc: Eric Biederman ebiederm@xmission.com Cc: Hari Bathini hbathini@linux.ibm.com Cc: Sourabh Jain sourabhjain@linux.ibm.com Cc: Eric DeVolder eric_devolder@yahoo.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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