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authorHugh Dickins <hugh@veritas.com>2008-12-09 13:14:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-10 08:01:54 -0800
commit9c24624727f6d6c460e45762a408ca5f5b9b8ef2 (patch)
tree39f41dc5e46a9f0e1151963eb1d4f2b7ff77ee3d /include/linux/ftrace.h
parent6ee5a399d6a92a52646836a6e10faf255c16393e (diff)
KSYM_SYMBOL_LEN fixes
Miles Lane tailing /sys files hit a BUG which Pekka Enberg has tracked to my 966c8c12dc9e77f931e2281ba25d2f0244b06949 sprint_symbol(): use less stack exposing a bug in slub's list_locations() - kallsyms_lookup() writes a 0 to namebuf[KSYM_NAME_LEN-1], but that was beyond the end of page provided. The 100 slop which list_locations() allows at end of page looks roughly enough for all the other stuff it might print after the symbol before it checks again: break out KSYM_SYMBOL_LEN earlier than before. Latencytop and ftrace and are using KSYM_NAME_LEN buffers where they need KSYM_SYMBOL_LEN buffers, and vmallocinfo a 2*KSYM_NAME_LEN buffer where it wants a KSYM_SYMBOL_LEN buffer: fix those before anyone copies them. [akpm@linux-foundation.org: ftrace.h needs module.h] Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc Miles Lane <miles.lane@gmail.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Steven Rostedt <srostedt@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/ftrace.h')
-rw-r--r--include/linux/ftrace.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 703eb53cfa2..9c5bc6be2b0 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -6,6 +6,7 @@
#include <linux/ktime.h>
#include <linux/init.h>
#include <linux/types.h>
+#include <linux/module.h>
#include <linux/kallsyms.h>
#ifdef CONFIG_FUNCTION_TRACER
@@ -231,7 +232,7 @@ ftrace_init_module(unsigned long *start, unsigned long *end) { }
struct boot_trace {
pid_t caller;
- char func[KSYM_NAME_LEN];
+ char func[KSYM_SYMBOL_LEN];
int result;
unsigned long long duration; /* usecs */
ktime_t calltime;