diff mbox series

devres: Use kmalloc_size_roundup() to match ksize() usage

Message ID 20221018090406.never.856-kees@kernel.org
State New
Headers
Series devres: Use kmalloc_size_roundup() to match ksize() usage |

Commit Message

Kees Cook Oct. 18, 2022, 9:04 a.m. UTC 
  Round up allocations with kmalloc_size_roundup() so that devres's use
of ksize() is always accurate and no special handling of the memory is
needed by KASAN, UBSAN_BOUNDS, nor FORTIFY_SOURCE.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 drivers/base/devres.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 4ab2b50ee38f..c0e100074aa3 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -101,6 +101,9 @@  static bool check_dr_size(size_t size, size_t *tot_size)
 					size, tot_size)))
 		return false;
 
+	/* Actually allocate the full kmalloc bucket size. */
+	*tot_size = kmalloc_size_roundup(*tot_size);
+
 	return true;
 }