dm-integrity: set ti->error on memory allocation failure

JIRA: https://issues.redhat.com/browse/RHEL-92761
Upstream Status: kernel/git/torvalds/linux.git

commit 00204ae
Author: Mikulas Patocka <mpatocka@redhat.com>
Date:   Mon Feb 10 16:14:22 2025 +0100

    dm-integrity: set ti->error on memory allocation failure

    The dm-integrity target didn't set the error string when memory
    allocation failed. This patch fixes it.

    Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
    Cc: stable@vger.kernel.org

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>

Author: bmarzins

drivers/md/dm-integrity.c

@@ -5084,16 +5084,19 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned int argc, char **argv
 
 		ic->recalc_bitmap = dm_integrity_alloc_page_list(n_bitmap_pages);
 		if (!ic->recalc_bitmap) {
+			ti->error = "Could not allocate memory for bitmap";
 			r = -ENOMEM;
 			goto bad;
 		}
 		ic->may_write_bitmap = dm_integrity_alloc_page_list(n_bitmap_pages);
 		if (!ic->may_write_bitmap) {
+			ti->error = "Could not allocate memory for bitmap";
 			r = -ENOMEM;
 			goto bad;
 		}
 		ic->bbs = kvmalloc_array(ic->n_bitmap_blocks, sizeof(struct bitmap_block_status), GFP_KERNEL);
 		if (!ic->bbs) {
+			ti->error = "Could not allocate memory for bitmap";
 			r = -ENOMEM;
 			goto bad;
 		}