From: Shiyong Li <a22381@motorola.com>
Date: Sat, 9 Dec 2017 01:38:24 +0000 (-0800)
Subject: fs/exfat: do error check for d_splice_alias return
X-Git-Tag: MMI-QSB30.62-17~313
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=720451566c14eaf558fdac5707aa841ea806f14e;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

fs/exfat: do error check for d_splice_alias return

This patch adds error check in case a Defenderect exFAT SD cards is inserted.

Change-Id: I37f6b8716abd556908aad72b18fcc7ac5719766e
Signed-off-by: Min Shi <e13386@motorola.com>
Signed-off-by: Shiyong Li <a22381@motorola.com>
Reviewed-on: https://gerrit.mot.com/1102184
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Igor Kovalenko <igork@motorola.com>
Submit-Approved: Jira Key
Reviewed-on: https://gerrit.mot.com/1276885
Reviewed-by: Hua Tan <tanhua1@motorola.com>
---

diff --git a/fs/exfat/exfat_super.c b/fs/exfat/exfat_super.c
index 2e041cdede7e..24159668960f 100644
--- a/fs/exfat/exfat_super.c
+++ b/fs/exfat/exfat_super.c
@@ -873,7 +873,7 @@ out:
 	}
 #else
 	dentry = d_splice_alias(inode, dentry);
-	if (dentry)
+	if (dentry && !IS_ERR(dentry))
 		dentry->d_time = dentry->d_parent->d_inode->i_version;
 #endif
 	DPRINTK("exfat_lookup exited 2\n");