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| author |   Wenwen Wang <wenwen@cs.uga.edu> | 2019-08-19 22:24:50 -0500 |
|---|---|---|
| committer |   Richard Weinberger <richard@nod.at> | 2019-09-15 22:11:58 +0200 |
| commit | 7992e00469c485f108a7f0da08be34b0fa441f79 (patch) | |
| tree | 57d0538e97c1a1b1c4a8bf0eb98d90f94043af6f /fs/ubifs/auth.c | |
| parent | ubifs: Fix memory leak in read_znode() error path (diff) | |
| download | linux-dev-7992e00469c485f108a7f0da08be34b0fa441f79.tar.xz linux-dev-7992e00469c485f108a7f0da08be34b0fa441f79.zip | |
ubifs: Fix memory leak in __ubifs_node_verify_hmac error path
In __ubifs_node_verify_hmac(), 'hmac' is allocated through kmalloc().
However, it is not deallocated in the following execution if
ubifs_node_calc_hmac() fails, leading to a memory leak bug. To fix this
issue, free 'hmac' before returning the error.
Fixes: 49525e5eecca ("ubifs: Add helper functions for authentication support")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs/ubifs/auth.c')
| -rw-r--r-- | fs/ubifs/auth.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ubifs/auth.c b/fs/ubifs/auth.c index d9af2de9084a..8cdbd53d780c 100644 --- a/fs/ubifs/auth.c +++ b/fs/ubifs/auth.c @@ -479,8 +479,10 @@ int __ubifs_node_verify_hmac(const struct ubifs_info *c, const void *node, return -ENOMEM; err = ubifs_node_calc_hmac(c, node, len, ofs_hmac, hmac); - if (err) + if (err) { + kfree(hmac); return err; + } err = crypto_memneq(hmac, node + ofs_hmac, hmac_len); |