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scsi: wd33c93: Replace deprecated strncpy() with strscpy()

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@p1 is assigned to @setup_buffer and then we manually assign a NUL-byte at
the first index. This renders the following strlen() call useless.
Moreover, we don't need to reassign p1 to setup_buffer for any reason --
neither do we need to manually set a NUL-byte at the end. strscpy()
resolves all this code making it easier to read.

Even considering the path where @str is falsey, the manual NUL-byte
assignment is useless as setup_buffer is declared with static storage
duration in the top-level scope which should NUL-initialize the whole
buffer.

Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Justin Stitt <justinstitt@google.com>
Link: https://lore.kernel.org/r/20240305-strncpy-drivers-scsi-mpi3mr-mpi3mr_fw-c-v3-7-5b78a13ff984@google.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Justin Stitt 2024-03-05 23:34:42 +00:00 committed by Martin K. Petersen
parent 8fd4c9c8e1
commit 855ce06f91
1 changed files with 1 additions and 3 deletions
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4
drivers/scsi/wd33c93.c
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@ -1721,9 +1721,7 @@ wd33c93_setup(char *str)
p1 = setup_buffer;
*p1 = '\0';
if (str)
strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer));
setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0';
p1 = setup_buffer;
strscpy(p1, str, SETUP_BUFFER_SIZE);
i = 0;
while (*p1 && (i < MAX_SETUP_ARGS)) {
p2 = strchr(p1, ',');