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authorAl Viro <viro@zeniv.linux.org.uk>2015-11-17 09:07:57 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2015-12-09 06:41:36 +0300
commit21fc61c73c3903c4c312d0802da01ec2b323d174 (patch)
treea26c29e3fbb766f00b023724e9e5b8b9bba9b879 /fs/exofs/namei.c
parentaa80deab33a8fb180e718f5e45514db19aade165 (diff)
downloadlinux-21fc61c73c3903c4c312d0802da01ec2b323d174.tar.xz
don't put symlink bodies in pagecache into highmem
kmap() in page_follow_link_light() needed to go - allowing to hold an arbitrary number of kmaps for long is a great way to deadlocking the system. new helper (inode_nohighmem(inode)) needs to be used for pagecache symlinks inodes; done for all in-tree cases. page_follow_link_light() instrumented to yell about anything missed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/exofs/namei.c')
-rw-r--r--fs/exofs/namei.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c
index 994e078da4bb..c20d77df2679 100644
--- a/fs/exofs/namei.c
+++ b/fs/exofs/namei.c
@@ -111,6 +111,7 @@ static int exofs_symlink(struct inode *dir, struct dentry *dentry,
if (l > sizeof(oi->i_data)) {
/* slow symlink */
inode->i_op = &page_symlink_inode_operations;
+ inode_nohighmem(inode);
inode->i_mapping->a_ops = &exofs_aops;
memset(oi->i_data, 0, sizeof(oi->i_data));