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authorDan Carpenter <dan.carpenter@oracle.com>2020-06-10 20:22:13 +0300
committerNamjae Jeon <namjae.jeon@samsung.com>2020-06-29 17:11:05 +0900
commite8dd3cda8667118b70d9fe527f61fe22623de04d (patch)
tree2d69cb34596b1d3966b324739a8fcc9fa6d094df
parent4ba6ccd695f5ed3ae851e59b443b757bbe4557fe (diff)
downloadlinux-e8dd3cda8667118b70d9fe527f61fe22623de04d.tar.bz2
exfat: add missing brelse() calls on error paths
If the second exfat_get_dentry() call fails then we need to release "old_bh" before returning. There is a similar bug in exfat_move_file(). Fixes: 5f2aa075070c ("exfat: add inode operations") Reported-by: Markus Elfring <Markus.Elfring@web.de> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
-rw-r--r--fs/exfat/namei.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c
index 5b0f35329d63..edd8023865a0 100644
--- a/fs/exfat/namei.c
+++ b/fs/exfat/namei.c
@@ -1077,10 +1077,14 @@ static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
epold = exfat_get_dentry(sb, p_dir, oldentry + 1, &old_bh,
&sector_old);
+ if (!epold)
+ return -EIO;
epnew = exfat_get_dentry(sb, p_dir, newentry + 1, &new_bh,
&sector_new);
- if (!epold || !epnew)
+ if (!epnew) {
+ brelse(old_bh);
return -EIO;
+ }
memcpy(epnew, epold, DENTRY_SIZE);
exfat_update_bh(sb, new_bh, sync);
@@ -1161,10 +1165,14 @@ static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir,
epmov = exfat_get_dentry(sb, p_olddir, oldentry + 1, &mov_bh,
&sector_mov);
+ if (!epmov)
+ return -EIO;
epnew = exfat_get_dentry(sb, p_newdir, newentry + 1, &new_bh,
&sector_new);
- if (!epmov || !epnew)
+ if (!epnew) {
+ brelse(mov_bh);
return -EIO;
+ }
memcpy(epnew, epmov, DENTRY_SIZE);
exfat_update_bh(sb, new_bh, IS_DIRSYNC(inode));