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nvme-core: fix memory leak in dhchap_secret_store

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Free dhchap_secret in nvme_ctrl_dhchap_secret_store() before we return
fix following kmemleack:-

unreferenced object 0xffff8886376ea800 (size 64):
  comm "check", pid 22048, jiffies 4344316705 (age 92.199s)
  hex dump (first 32 bytes):
    44 48 48 43 2d 31 3a 30 30 3a 6e 78 72 35 4b 67  DHHC-1:00:nxr5Kg
    75 58 34 75 6f 41 78 73 4a 61 34 63 2f 68 75 4c  uX4uoAxsJa4c/huL
  backtrace:
    [<0000000030ce5d4b>] __kmalloc+0x4b/0x130
    [<000000009be1cdc1>] nvme_ctrl_dhchap_secret_store+0x8f/0x160 [nvme_core]
    [<00000000ac06c96a>] kernfs_fop_write_iter+0x12b/0x1c0
    [<00000000437e7ced>] vfs_write+0x2ba/0x3c0
    [<00000000f9491baf>] ksys_write+0x5f/0xe0
    [<000000001c46513d>] do_syscall_64+0x3b/0x90
    [<00000000ecf348fe>] entry_SYSCALL_64_after_hwframe+0x72/0xdc
unreferenced object 0xffff8886376eaf00 (size 64):
  comm "check", pid 22048, jiffies 4344316736 (age 92.168s)
  hex dump (first 32 bytes):
    44 48 48 43 2d 31 3a 30 30 3a 6e 78 72 35 4b 67  DHHC-1:00:nxr5Kg
    75 58 34 75 6f 41 78 73 4a 61 34 63 2f 68 75 4c  uX4uoAxsJa4c/huL
  backtrace:
    [<0000000030ce5d4b>] __kmalloc+0x4b/0x130
    [<000000009be1cdc1>] nvme_ctrl_dhchap_secret_store+0x8f/0x160 [nvme_core]
    [<00000000ac06c96a>] kernfs_fop_write_iter+0x12b/0x1c0
    [<00000000437e7ced>] vfs_write+0x2ba/0x3c0
    [<00000000f9491baf>] ksys_write+0x5f/0xe0
    [<000000001c46513d>] do_syscall_64+0x3b/0x90
    [<00000000ecf348fe>] entry_SYSCALL_64_after_hwframe+0x72/0xdc

Fixes: f50fff73d6 ("nvme: implement In-Band authentication")
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Yi Zhang <yi.zhang@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Chaitanya Kulkarni 2023-04-28 00:31:12 -07:00 committed by Keith Busch
parent 4f1731df60
commit a836ca33c5
1 changed files with 5 additions and 2 deletions
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7
drivers/nvme/host/core.c
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@ -3825,8 +3825,10 @@ static ssize_t nvme_ctrl_dhchap_secret_store(struct device *dev,
int ret;
ret = nvme_auth_generate_key(dhchap_secret, &key);
if (ret)
if (ret) {
kfree(dhchap_secret);
return ret;
}
kfree(opts->dhchap_secret);
opts->dhchap_secret = dhchap_secret;
host_key = ctrl->host_key;
@ -3834,7 +3836,8 @@ static ssize_t nvme_ctrl_dhchap_secret_store(struct device *dev,
ctrl->host_key = key;
mutex_unlock(&ctrl->dhchap_auth_mutex);
nvme_auth_free_key(host_key);
}
} else
kfree(dhchap_secret);
/* Start re-authentication */
dev_info(ctrl->device, "re-authenticating controller\n");
queue_work(nvme_wq, &ctrl->dhchap_auth_work);