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| author | Arnd Bergmann <arnd@arndb.de> | 2024-04-09 16:00:57 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-25 21:07:08 -0700 |
| commit | 051e7503070179f2278c0d4fa7dee441adb558ca (patch) | |
| tree | 7cea9d9163f5a870eb613ab55de613dcecd213f2 | |
| parent | 597bc741e5ac2608e3ec0afd4256163879ab506b (diff) | |
| download | linux-stable-051e7503070179f2278c0d4fa7dee441adb558ca.tar.gz linux-stable-051e7503070179f2278c0d4fa7dee441adb558ca.tar.bz2 linux-stable-051e7503070179f2278c0d4fa7dee441adb558ca.zip | |
blktrace: convert strncpy() to strscpy_pad()
gcc-9 warns about a possibly non-terminated string copy:
kernel/trace/blktrace.c: In function 'do_blk_trace_setup':
kernel/trace/blktrace.c:527:2: error: 'strncpy' specified bound 32 equals destination size [-Werror=stringop-truncation]
Newer versions are fine here because they see the following explicit
nul-termination. Using strscpy_pad() avoids the warning and
simplifies the code a little. The padding helps give a clean
buffer to userspace.
Link: https://lkml.kernel.org/r/20240409140059.3806717-5-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Justin Stitt <justinstitt@google.com>
Cc: Alexey Starikovskiy <astarikovskiy@suse.de>
Cc: Bob Moore <robert.moore@intel.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Len Brown <lenb@kernel.org>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nicolas Schier <nicolas@fjasle.eu>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: "Richard Russon (FlatCap)" <ldm@flatcap.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | kernel/trace/blktrace.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index d5d94510afd3..8fd292d34d89 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -524,8 +524,7 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev, if (!buts->buf_size || !buts->buf_nr) return -EINVAL; - strncpy(buts->name, name, BLKTRACE_BDEV_SIZE); - buts->name[BLKTRACE_BDEV_SIZE - 1] = '\0'; + strscpy_pad(buts->name, name, BLKTRACE_BDEV_SIZE); /* * some device names have larger paths - convert the slashes |