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scsi: message: fusion: 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/20230530160248.411637-1-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 2023-05-30 16:02:48 +00:00 committed by Martin K. Petersen
parent 4dae0262fb
commit dbe37c71d1
2 changed files with 3 additions and 3 deletions
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4
drivers/message/fusion/mptbase.c
View File

@ -712,7 +712,7 @@ mpt_register(MPT_CALLBACK cbfunc, MPT_DRIVER_CLASS dclass, char *func_name)
MptDriverClass[cb_idx] = dclass;
MptEvHandlers[cb_idx] = NULL;
last_drv_idx = cb_idx;
strlcpy(MptCallbacksName[cb_idx], func_name,
strscpy(MptCallbacksName[cb_idx], func_name,
MPT_MAX_CALLBACKNAME_LEN+1);
break;
}
@ -7666,7 +7666,7 @@ mpt_display_event_info(MPT_ADAPTER *ioc, EventNotificationReply_t *pEventReply)
break;
}
if (ds)
strlcpy(evStr, ds, EVENT_DESCR_STR_SZ);
strscpy(evStr, ds, EVENT_DESCR_STR_SZ);
devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT

2
drivers/message/fusion/mptctl.c
View File

@ -2408,7 +2408,7 @@ mptctl_hp_hostinfo(MPT_ADAPTER *ioc, unsigned long arg, unsigned int data_size)
if (mpt_config(ioc, &cfg) == 0) {
ManufacturingPage0_t *pdata = (ManufacturingPage0_t *) pbuf;
if (strlen(pdata->BoardTracerNumber) > 1) {
strlcpy(karg.serial_number,
strscpy(karg.serial_number,
pdata->BoardTracerNumber, 24);
}
}