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ANDROID: sdcardfs: d_splice_alias can return error values
author
Daniel Rosenberg
<drosen@google.com>
Wed, 7 Jun 2017 19:44:50 +0000
(12:44 -0700)
committer
Amit Pundir
<amit.pundir@linaro.org>
Tue, 14 Aug 2018 12:17:11 +0000
(17:47 +0530)
We must check that d_splice_alias was successful before using its
output.
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Bug:
62390017
Change-Id: Ifda0a052fb3f67e35c635a4e5e907876c5400978
fs/sdcardfs/lookup.c
patch
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diff --git
a/fs/sdcardfs/lookup.c
b/fs/sdcardfs/lookup.c
index
83f6083
..
7dab5f7
100644
(file)
--- a/
fs/sdcardfs/lookup.c
+++ b/
fs/sdcardfs/lookup.c
@@
-199,7
+199,8
@@
static struct dentry *__sdcardfs_interpose(struct dentry *dentry,
ret_dentry = d_splice_alias(inode, dentry);
dentry = ret_dentry ?: dentry;
- update_derived_permission_lock(dentry);
+ if (!IS_ERR(dentry))
+ update_derived_permission_lock(dentry);
out:
return ret_dentry;
}