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authorJoe Perches <joe@perches.com>2010-04-14 09:27:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-04-14 10:32:35 -0700
commit4e310fda91cb095915395f811d10b2c900c9589e (patch)
tree5e4d6b2bd76abe6f2bb0db12d6d82f697007d1e5 /lib/vsprintf.c
parent2ba3abd8186f24c7fb418927025b4e2120e3a362 (diff)
downloadlinux-4e310fda91cb095915395f811d10b2c900c9589e.tar.gz
vsprintf: Change struct printf_spec.precision from s8 to s16
Commit ef0658f3de484bf9b173639cd47544584e01efa5 changed precision from int to s8. There is existing kernel code that uses a larger precision. An example from the audit code: vsnprintf(...,..., " msg='%.1024s'", (char *)data); which overflows precision and truncates to nothing. Extending precision size fixes the audit system issue. Other changes: Change the size of the struct printf_spec.type from u16 to u8 so sizeof(struct printf_spec) stays as small as possible. Reorder the struct members so sizeof(struct printf_spec) remains 64 bits without alignment holes. Document the struct members a bit more. Original-patch-by: Eric Paris <eparis@redhat.com> Signed-off-by: Joe Perches <joe@perches.com> Tested-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/vsprintf.c')
-rw-r--r--lib/vsprintf.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 24112e5a578..7376b7c55ff 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -408,12 +408,12 @@ enum format_type {
};
struct printf_spec {
- u16 type;
- s16 field_width; /* width of output field */
+ u8 type; /* format_type enum */
u8 flags; /* flags to number() */
- u8 base;
- s8 precision; /* # of digits/chars */
- u8 qualifier;
+ u8 base; /* number base, 8, 10 or 16 only */
+ u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */
+ s16 field_width; /* width of output field */
+ s16 precision; /* # of digits/chars */
};
static char *number(char *buf, char *end, unsigned long long num,