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nvme: fix potential memory leak in option parsing 

[ Upstream commit 59a2f3f00f ]

When specifying same string type option several times,
current option parsing may cause memory leak. Hence,
call kfree for previous one in this case.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Chengguang Xu 2018-04-14 20:06:19 +08:00 committed by Greg Kroah-Hartman
parent 665d3c7f1e
commit b19122a48f
1 changed files with 6 additions and 0 deletions
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6
drivers/nvme/host/fabrics.c
View File

@ -587,6 +587,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
ret = -ENOMEM;
goto out;
}
kfree(opts->transport);
opts->transport = p;
break;
case NVMF_OPT_NQN:
@ -595,6 +596,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
ret = -ENOMEM;
goto out;
}
kfree(opts->subsysnqn);
opts->subsysnqn = p;
nqnlen = strlen(opts->subsysnqn);
if (nqnlen >= NVMF_NQN_SIZE) {
@ -617,6 +619,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
ret = -ENOMEM;
goto out;
}
kfree(opts->traddr);
opts->traddr = p;
break;
case NVMF_OPT_TRSVCID:
@ -625,6 +628,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
ret = -ENOMEM;
goto out;
}
kfree(opts->trsvcid);
opts->trsvcid = p;
break;
case NVMF_OPT_QUEUE_SIZE:
@ -706,6 +710,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
ret = -EINVAL;
goto out;
}
nvmf_host_put(opts->host);
opts->host = nvmf_host_add(p);
kfree(p);
if (!opts->host) {
@ -731,6 +736,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
ret = -ENOMEM;
goto out;
}
kfree(opts->host_traddr);
opts->host_traddr = p;
break;
case NVMF_OPT_HOST_ID: