kexec_file: fix elfcorehdr digest exclusion when CONFIG_CRASH_HOTPLUG=y

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/[email protected]
Fixes: f7cc804a9fd4 ("kexec: exclude elfcorehdr from the segment digest")
Signed-off-by: Petr Tesarik <[email protected]>
Acked-by: Baoquan He <[email protected]>
Cc: Eric Biederman <[email protected]>
Cc: Hari Bathini <[email protected]>
Cc: Sourabh Jain <[email protected]>
Cc: Eric DeVolder <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions