mainline inclusion from mainline-v7.2-rc3 commit 76c6f845dc0c614304a6e6ee619b552f97cf24b3 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/17390 CVE: CVE-2026-72106 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- commit 76c6f845dc0c614304a6e6ee619b552f97cf24b3 upstream. sizeof(tt->version) is 12 bytes, but the code writes 16 bytes into the output buffer - info->vers->version[0], info->vers->version[1], info->vers->version[2] and info->vers->next. This can cause buffer overflow. Fix this buffer overflow by replacing "sizeof(tt->version)" with "sizeof(struct dm_target_versions)". Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Assisted-by: Claude:claude-opus-4.6 Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Conflicts: drivers/md/dm-ioctl.c [ctx conflicts] Signed-off-by: Zhou Minqiang <zhouminqiang2@huawei.com> --- drivers/md/dm-ioctl.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index 3bb9c0dced6e..2665e893cf22 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -585,9 +585,7 @@ static void list_version_get_info(struct target_type *tt, void *param) struct vers_iter *info = param; /* Check space - it might have changed since the first iteration */ - if ((char *)info->vers + sizeof(tt->version) + strlen(tt->name) + 1 > - info->end) { - + if ((char *)info->vers + sizeof(struct dm_target_versions) + strlen(tt->name) + 1 > info->end) { info->flags = DM_BUFFER_FULL_FLAG; return; } -- 2.52.0