Commit 88dd117c92a1 for kernel

commit 88dd117c92a142253fb7a17e791773902b3babc6
Author: Mikulas Patocka <mpatocka@redhat.com>
Date:   Thu Jul 9 21:36:01 2026 +0200

    dm-verity: increase sprintf buffer size

    The prefix "DM_VERITY_ERR_BLOCK_NR" is 22 chars. Add '=', one digit for
    type, ',', up to 20 digits for a u64 block number, and a NUL terminator:
    that's 46 bytes. The buffer is 42 bytes. For block numbers >= 16 decimal
    digits (devices larger than ~16 EB with 4K blocks), snprintf silently
    truncates the uevent environment variable.

    Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
    Assisted-by: Claude:claude-opus-4.6
    Fixes: 65ff5b7ddf05 ("dm verity: add error handling modes for corrupted blocks")
    Cc: stable@vger.kernel.org

diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index adfda1fdab6a..e63a8290bd3a 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -26,7 +26,7 @@

 #define DM_MSG_PREFIX			"verity"

-#define DM_VERITY_ENV_LENGTH		42
+#define DM_VERITY_ENV_LENGTH		46
 #define DM_VERITY_ENV_VAR_NAME		"DM_VERITY_ERR_BLOCK_NR"

 #define DM_VERITY_DEFAULT_PREFETCH_SIZE	262144