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fs/xattr.c: suppress page allocation failure warnings from sys_listxattr() 

This size is user controllable, up to a maximum of XATTR_LIST_MAX (64k).
So it's trivial for someone to trigger a stream of order:4 page
allocation errors.

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Chinner <david@fromorbit.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dave Jones 2012-04-05 14:25:06 -07:00 committed by Linus Torvalds
parent b82c32872d
commit 703bf2d122
1 changed files with 1 additions and 1 deletions
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2
fs/xattr.c
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@ -496,7 +496,7 @@ listxattr(struct dentry *d, char __user *list, size_t size)
if (size) {
if (size > XATTR_LIST_MAX)
size = XATTR_LIST_MAX;
klist = kmalloc(size, GFP_KERNEL);
klist = kmalloc(size, __GFP_NOWARN | GFP_KERNEL);
if (!klist)
return -ENOMEM;
}