The patch titled
Subject: mmap: fix remap_file_pages() regression
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mmap-fix-remap_file_pages-regression.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mmap-fix-remap_file_pages-regression.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Liam Howlett <liam.howlett@xxxxxxxxxx>
Subject: mmap: fix remap_file_pages() regression
Date: Tue, 25 Oct 2022 16:12:49 +0000
When using the VMA iterator, the final execution will set the variable
'next' to NULL which causes the function to fail out. Restore the break
in the loop to exit the VMA iterator early without clearing NULL fixes the
issue.
Link: https://lore.kernel.org/lkml/29344.1666681759@jrobl/
Link: https://lkml.kernel.org/r/20221025161222.2634030-1-Liam.Howlett@xxxxxxxxxx
Fixes: 763ecb035029 (mm: remove the vma linked list)
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reported-by: "J. R. Okajima" <hooanon05g@xxxxxxxxx>
Tested-by: "J. R. Okajima" <hooanon05g@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/mmap.c~mmap-fix-remap_file_pages-regression
+++ a/mm/mmap.c
@@ -2852,6 +2852,9 @@ SYSCALL_DEFINE5(remap_file_pages, unsign
if (next->vm_flags != vma->vm_flags)
goto out;
+ if (start + size <= next->vm_end)
+ break;
+
prev = next;
}
_
Patches currently in -mm which might be from liam.howlett@xxxxxxxxxx are
mmap-fix-remap_file_pages-regression.patch
maple_tree-fix-mas_find_rev-comment.patch
maple_tree-update-copyright-dates-for-test-code.patch
