The quilt patch titled
Subject: mm/madvise: split out madvise input validity check
has been removed from the -mm tree. Its filename was
mm-madvise-split-out-madvise-input-validity-check.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/madvise: split out madvise input validity check
Date: Wed, 5 Feb 2025 22:15:15 -0800
Split out the madvise parameters validation logic from do_madvise(), for
easy reuse of the logic from a future change.
Link: https://lkml.kernel.org/r/20250206061517.2958-3-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Reviewed-by: Shakeel Butt <shakeel.butt@xxxxxxxxx>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
Reviewed-by: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Reviewed-by: Liam R. Howlett <howlett@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/madvise.c | 32 ++++++++++++++++++++++----------
1 file changed, 22 insertions(+), 10 deletions(-)
--- a/mm/madvise.c~mm-madvise-split-out-madvise-input-validity-check
+++ a/mm/madvise.c
@@ -1618,6 +1618,27 @@ static void madvise_unlock(struct mm_str
mmap_read_unlock(mm);
}
+static bool is_valid_madvise(unsigned long start, size_t len_in, int behavior)
+{
+ size_t len;
+
+ if (!madvise_behavior_valid(behavior))
+ return false;
+
+ if (!PAGE_ALIGNED(start))
+ return false;
+ len = PAGE_ALIGN(len_in);
+
+ /* Check to see whether len was rounded up from small -ve to zero */
+ if (len_in && !len)
+ return false;
+
+ if (start + len < start)
+ return false;
+
+ return true;
+}
+
/*
* The madvise(2) system call.
*
@@ -1697,20 +1718,11 @@ int do_madvise(struct mm_struct *mm, uns
size_t len;
struct blk_plug plug;
- if (!madvise_behavior_valid(behavior))
+ if (!is_valid_madvise(start, len_in, behavior))
return -EINVAL;
- if (!PAGE_ALIGNED(start))
- return -EINVAL;
len = PAGE_ALIGN(len_in);
-
- /* Check to see whether len was rounded up from small -ve to zero */
- if (len_in && !len)
- return -EINVAL;
-
end = start + len;
- if (end < start)
- return -EINVAL;
if (end == start)
return 0;
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
mm-damon-sysfs-schemes-let-damon_sysfs_scheme_set_filters-be-used-for-different-named-directories.patch
mm-damon-sysfs-schemes-implement-core_filters-and-ops_filters-directories.patch
mm-damon-sysfs-schemes-commit-filters-in-coreops_filters-directories.patch
mm-damon-core-expose-damos_filter_for_ops-to-damon-kernel-api-callers.patch
mm-damon-sysfs-schemes-record-filters-of-which-layer-should-be-added-to-the-given-filters-directory.patch
mm-damon-sysfs-schemes-return-error-when-for-attempts-to-install-filters-on-wrong-sysfs-directory.patch
docs-abi-damon-document-coreops_filters-directories.patch
docs-admin-guide-mm-damon-usage-update-for-coreops_filters-directories.patch
mm-damon-sysfs-validate-user-inputs-from-damon_sysfs_commit_input.patch
mm-damon-core-invoke-kdamond_call-after-merging-is-done-if-possible.patch
mm-damon-core-make-damon_set_attrs-be-safe-to-be-called-from-damon_call.patch
mm-damon-sysfs-handle-commit-command-using-damon_call.patch
mm-damon-sysfs-remove-damon_sysfs_cmd_request-code-from-damon_sysfs_handle_cmd.patch
mm-damon-sysfs-remove-damon_sysfs_cmd_request_callback-and-its-callers.patch
mm-damon-sysfs-remove-damon_sysfs_cmd_request-and-its-readers.patch
mm-damon-sysfs-schemes-remove-obsolete-comment-for-damon_sysfs_schemes_clear_regions.patch
mm-damon-remove-damon_callback-private.patch
mm-damon-remove-before_start-of-damon_callback.patch
mm-damon-remove-damon_callback-after_sampling.patch
mm-damon-remove-damon_callback-before_damos_apply.patch
mm-damon-remove-damon_operations-reset_aggregated.patch
mm-damon-sysfs-schemes-avoid-wformat-security-warning-on-damon_sysfs_access_pattern_add_range_dir.patch
mm-madvise-use-is_memory_failure-from-madvise_do_behavior.patch
mm-madvise-split-out-populate-behavior-check-logic.patch
mm-madvise-deduplicate-madvise_do_behavior-skip-case-handlings.patch
mm-madvise-remove-len-parameter-of-madvise_do_behavior.patch
