6.6-stable review patch. If anyone has any objections, please let me know.
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From: Zongmin Zhou zhouzongmin@kylinos.cn
[ Upstream commit 90044481e7cca6cb3125b3906544954a25f1309f ]
When allocated memory for 'new' failed,just return will cause memory leak of 'ar'.
Fixes: 1819a9042999 ("ksmbd: reorganize ksmbd_iov_pin_rsp()") Reported-by: kernel test robot lkp@intel.com Reported-by: Dan Carpenter error27@gmail.com Closes: https://lore.kernel.org/r/202311031837.H3yo7JVl-lkp@intel.com/ Signed-off-by: Zongmin Zhouzhouzongmin@kylinos.cn Acked-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/smb/server/ksmbd_work.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/smb/server/ksmbd_work.c b/fs/smb/server/ksmbd_work.c index a2ed441e837ae..2510b9f3c8c14 100644 --- a/fs/smb/server/ksmbd_work.c +++ b/fs/smb/server/ksmbd_work.c @@ -106,7 +106,7 @@ static inline void __ksmbd_iov_pin(struct ksmbd_work *work, void *ib, static int __ksmbd_iov_pin_rsp(struct ksmbd_work *work, void *ib, int len, void *aux_buf, unsigned int aux_size) { - struct aux_read *ar; + struct aux_read *ar = NULL; int need_iov_cnt = 1;
if (aux_size) { @@ -123,8 +123,11 @@ static int __ksmbd_iov_pin_rsp(struct ksmbd_work *work, void *ib, int len, new = krealloc(work->iov, sizeof(struct kvec) * work->iov_alloc_cnt, GFP_KERNEL | __GFP_ZERO); - if (!new) + if (!new) { + kfree(ar); + work->iov_alloc_cnt -= 4; return -ENOMEM; + } work->iov = new; }