lkml.org 
[lkml]   [2022]   [Jan]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL 5.15 28/44] udf: Fix error handling in udf_new_inode()
Date
From: Jan Kara <jack@suse.cz>

[ Upstream commit f05f2429eec60851b98bdde213de31dab697c01b ]

When memory allocation of iinfo or block allocation fails, already
allocated struct udf_inode_info gets freed with iput() and
udf_evict_inode() may look at inode fields which are not properly
initialized. Fix it by marking inode bad before dropping reference to it
in udf_new_inode().

Reported-by: syzbot+9ca499bb57a2b9e4c652@syzkaller.appspotmail.com
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/udf/ialloc.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index 2ecf0e87660e3..b5d611cee749c 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -77,6 +77,7 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode)
GFP_KERNEL);
}
if (!iinfo->i_data) {
+ make_bad_inode(inode);
iput(inode);
return ERR_PTR(-ENOMEM);
}
@@ -86,6 +87,7 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode)
dinfo->i_location.partitionReferenceNum,
start, &err);
if (err) {
+ make_bad_inode(inode);
iput(inode);
return ERR_PTR(err);
}
--
2.34.1
\
 
 \ /
  Last update: 2022-01-17 18:05    [W:0.858 / U:0.096 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site