[PATCH 2/2] vmalloc: reject vmap with VM_FLUSH_RESET_PERMS

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



VM_FLUSH_RESET_PERMS is just for use with vmalloc as it is tied to freeing
the underlying pages.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 mm/vmalloc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9e30f0b3920325..88a644cde9fb12 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2849,6 +2849,9 @@ void *vmap(struct page **pages, unsigned int count,
 
 	might_sleep();
 
+	if (WARN_ON_ONCE(flags & VM_FLUSH_RESET_PERMS))
+		return NULL;
+
 	/*
 	 * Your top guard is someone else's bottom guard. Not having a top
 	 * guard compromises someone else's mappings too.
-- 
2.35.1




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [Linux for Sparc]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux