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authorDavid Hildenbrand <david@redhat.com>2021-04-23 09:38:14 +0200
committerDavid Hildenbrand <david@redhat.com>2021-09-03 18:42:01 +0200
commit6128b3af2a5e42386aa7faf37609b57f39fb7d00 (patch)
tree6b563660608582f8b1e50e43ee1df97e6028e611 /mm/mmap.c
parentmm: remove VM_DENYWRITE (diff)
downloadlinux-dev-6128b3af2a5e42386aa7faf37609b57f39fb7d00.tar.xz
linux-dev-6128b3af2a5e42386aa7faf37609b57f39fb7d00.zip
mm: ignore MAP_DENYWRITE in ksys_mmap_pgoff()
Let's also remove masking off MAP_DENYWRITE from ksys_mmap_pgoff(): the last in-tree occurrence of MAP_DENYWRITE is now in LEGACY_MAP_MASK, which accepts the flag e.g., for MAP_SHARED_VALIDATE; however, the flag is ignored throughout the kernel now. Add a comment to LEGACY_MAP_MASK stating that MAP_DENYWRITE is ignored. Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Christian K├Ânig <christian.koenig@amd.com> Signed-off-by: David Hildenbrand <david@redhat.com>
Diffstat (limited to 'mm/mmap.c')
-rw-r--r--mm/mmap.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 589dc1dc13db..bf11fc6e8311 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1626,8 +1626,6 @@ unsigned long ksys_mmap_pgoff(unsigned long addr, unsigned long len,
return PTR_ERR(file);
}
- flags &= ~MAP_DENYWRITE;
-
retval = vm_mmap_pgoff(file, addr, len, prot, flags, pgoff);
out_fput:
if (file)