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| author | Nicolas Iooss <nicolas.iooss_linux@m4x.org> | 2015-06-25 15:03:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-25 17:00:43 -0700 |
| commit | b4176b7c135ed28e78752552358919e5b14ad2bf (patch) | |
| tree | 09f9c9431b7fd0dee8fca86f75cb211132ae648c /fs | |
| parent | 5202efe544c279be152f44f2821010ff7b2d7e5b (diff) | |
| download | lwn-b4176b7c135ed28e78752552358919e5b14ad2bf.tar.gz lwn-b4176b7c135ed28e78752552358919e5b14ad2bf.zip | |
coredump: add __printf attribute to cn_*printf functions
This allows detecting improper format string at build time, like:
fs/coredump.c:225:5: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int' [-Wformat=]
err = cn_printf(cn, "%ld", cprm->siginfo->si_signo);
^
As si_signo is always an int, the format should be %d here.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/coredump.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/coredump.c b/fs/coredump.c index 833a57bc856c..e52e0064feac 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -70,7 +70,8 @@ static int expand_corename(struct core_name *cn, int size) return 0; } -static int cn_vprintf(struct core_name *cn, const char *fmt, va_list arg) +static __printf(2, 0) int cn_vprintf(struct core_name *cn, const char *fmt, + va_list arg) { int free, need; va_list arg_copy; @@ -93,7 +94,7 @@ again: return -ENOMEM; } -static int cn_printf(struct core_name *cn, const char *fmt, ...) +static __printf(2, 3) int cn_printf(struct core_name *cn, const char *fmt, ...) { va_list arg; int ret; @@ -105,7 +106,8 @@ static int cn_printf(struct core_name *cn, const char *fmt, ...) return ret; } -static int cn_esc_printf(struct core_name *cn, const char *fmt, ...) +static __printf(2, 3) +int cn_esc_printf(struct core_name *cn, const char *fmt, ...) { int cur = cn->used; va_list arg; @@ -225,7 +227,8 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm) break; /* signal that caused the coredump */ case 's': - err = cn_printf(cn, "%ld", cprm->siginfo->si_signo); + err = cn_printf(cn, "%d", + cprm->siginfo->si_signo); break; /* UNIX time of coredump */ case 't': { |