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scsi: target: Replace all non-returning strlcpy() with strscpy()

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strlcpy() reads the entire source buffer first.  This read may exceed the
destination size limit.  This is both inefficient and can lead to linear
read overflows if a source string is not NUL-terminated [1].  In an effort
to remove strlcpy() completely [2], replace strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Link: https://lore.kernel.org/r/20230516025322.2804923-1-azeemshaikh38@gmail.com
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Azeem Shaikh 2023-05-16 02:53:22 +00:00 committed by Martin K. Petersen
parent 973464fded
commit 0871237a94
4 changed files with 12 additions and 12 deletions
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4
drivers/target/iscsi/iscsi_target_parameters.c
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@ -726,8 +726,8 @@ static int iscsi_add_notunderstood_response(
}
INIT_LIST_HEAD(&extra_response->er_list);
strlcpy(extra_response->key, key, sizeof(extra_response->key));
strlcpy(extra_response->value, NOTUNDERSTOOD,
strscpy(extra_response->key, key, sizeof(extra_response->key));
strscpy(extra_response->value, NOTUNDERSTOOD,
sizeof(extra_response->value));
list_add_tail(&extra_response->er_list,

4
drivers/target/iscsi/iscsi_target_util.c
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@ -1321,7 +1321,7 @@ void iscsit_collect_login_stats(
if (conn->param_list)
intrname = iscsi_find_param_from_key(INITIATORNAME,
conn->param_list);
strlcpy(ls->last_intr_fail_name,
strscpy(ls->last_intr_fail_name,
(intrname ? intrname->value : "Unknown"),
sizeof(ls->last_intr_fail_name));
@ -1360,7 +1360,7 @@ void iscsit_fill_cxn_timeout_err_stats(struct iscsit_session *sess)
return;
spin_lock_bh(&tiqn->sess_err_stats.lock);
strlcpy(tiqn->sess_err_stats.last_sess_fail_rem_name,
strscpy(tiqn->sess_err_stats.last_sess_fail_rem_name,
sess->sess_ops->InitiatorName,
sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name));
tiqn->sess_err_stats.last_sess_failure_type =

10
drivers/target/target_core_configfs.c
View File

@ -649,7 +649,7 @@ static void dev_set_t10_wwn_model_alias(struct se_device *dev)
* here without potentially breaking existing setups, so continue to
* truncate one byte shorter than what can be carried in INQUIRY.
*/
strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
}
static ssize_t emulate_model_alias_store(struct config_item *item,
@ -675,7 +675,7 @@ static ssize_t emulate_model_alias_store(struct config_item *item,
if (flag) {
dev_set_t10_wwn_model_alias(dev);
} else {
strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
sizeof(dev->t10_wwn.model));
}
da->emulate_model_alias = flag;
@ -1426,7 +1426,7 @@ static ssize_t target_wwn_vendor_id_store(struct config_item *item,
}
BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
strscpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
" %s\n", dev->t10_wwn.vendor);
@ -1482,7 +1482,7 @@ static ssize_t target_wwn_product_id_store(struct config_item *item,
}
BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
strscpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
dev->t10_wwn.model);
@ -1538,7 +1538,7 @@ static ssize_t target_wwn_revision_store(struct config_item *item,
}
BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
strscpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
dev->t10_wwn.revision);

6
drivers/target/target_core_device.c
View File

@ -789,10 +789,10 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
xcopy_lun->lun_tpg = &xcopy_pt_tpg;
/* Preload the default INQUIRY const values */
strlcpy(dev->t10_wwn.vendor, "LIO-ORG", sizeof(dev->t10_wwn.vendor));
strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
strscpy(dev->t10_wwn.vendor, "LIO-ORG", sizeof(dev->t10_wwn.vendor));
strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
sizeof(dev->t10_wwn.model));
strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev,
strscpy(dev->t10_wwn.revision, dev->transport->inquiry_rev,
sizeof(dev->t10_wwn.revision));
return dev;