From: Dave Kleikamp <shaggy@austin.ibm.com>
Date: Tue, 20 Sep 2005 19:58:11 +0000 (-0500)
Subject: JFS: don't dereference tlck->ip from txUpdateMap
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=438282d85de2c8f8c5183fdf55140e51a0b18670;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

JFS: don't dereference tlck->ip from txUpdateMap

The inode pointer may no longer be valid

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
---

diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 8132fce80993..9b71ed2674fe 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -725,6 +725,9 @@ struct tlock *txLock(tid_t tid, struct inode *ip, struct metapage * mp,
 	else
 		tlck->flag = tlckINODELOCK;
 
+	if (S_ISDIR(ip->i_mode))
+		tlck->flag |= tlckDIRECTORY;
+
 	tlck->type = 0;
 
 	/* bind the tlock and the page */
@@ -1009,6 +1012,8 @@ struct tlock *txMaplock(tid_t tid, struct inode *ip, int type)
 
 	/* bind the tlock and the object */
 	tlck->flag = tlckINODELOCK;
+	if (S_ISDIR(ip->i_mode))
+		tlck->flag |= tlckDIRECTORY;
 	tlck->ip = ip;
 	tlck->mp = NULL;
 
@@ -1077,6 +1082,8 @@ struct linelock *txLinelock(struct linelock * tlock)
 	linelock->flag = tlckLINELOCK;
 	linelock->maxcnt = TLOCKLONG;
 	linelock->index = 0;
+	if (tlck->flag & tlckDIRECTORY)
+		linelock->flag |= tlckDIRECTORY;
 
 	/* append linelock after tlock */
 	linelock->next = tlock->next;
@@ -2358,7 +2365,7 @@ static void txUpdateMap(struct tblock * tblk)
 			 */
 			else {	/* (maplock->flag & mlckFREE) */
 
-				if (S_ISDIR(tlck->ip->i_mode))
+				if (tlck->flag & tlckDIRECTORY)
 					txFreeMap(ipimap, maplock,
 						  tblk, COMMIT_PWMAP);
 				else
diff --git a/fs/jfs/jfs_txnmgr.h b/fs/jfs/jfs_txnmgr.h
index 59ad0f6b7231..0e4dc4514c47 100644
--- a/fs/jfs/jfs_txnmgr.h
+++ b/fs/jfs/jfs_txnmgr.h
@@ -122,6 +122,7 @@ extern struct tlock *TxLock;	/* transaction lock table */
 #define tlckLOG			0x0800
 /* updateMap state */
 #define	tlckUPDATEMAP		0x0080
+#define	tlckDIRECTORY		0x0040
 /* freeLock state */
 #define tlckFREELOCK		0x0008
 #define tlckWRITEPAGE		0x0004