lkml.org 
[lkml]   [2019]   [Feb]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] dm crypt: fix memory leak in dm_crypt_integrity_io_alloc() error path
Date
From: Sultan Alsawaf <sultan@kerneltoast.com>

dm_crypt_integrity_io_alloc() allocates space for an integrity payload but
doesn't free it in the error path, leaking memory. Add a bio_integrity_free()
invocation upon error to fix the memory leak.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
---
drivers/md/dm-crypt.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index dd538e6b2..f731e1fe0 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -939,8 +939,10 @@ static int dm_crypt_integrity_io_alloc(struct dm_crypt_io *io, struct bio *bio)

ret = bio_integrity_add_page(bio, virt_to_page(io->integrity_metadata),
tag_len, offset_in_page(io->integrity_metadata));
- if (unlikely(ret != tag_len))
+ if (unlikely(ret != tag_len)) {
+ bio_integrity_free(bio);
return -ENOMEM;
+ }

return 0;
}
--
2.20.1
\
 
 \ /
  Last update: 2019-02-16 22:03    [W:0.063 / U:0.160 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site