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authorLi Zefan <lizf@cn.fujitsu.com>2009-07-07 01:53:47 -0400
committerIngo Molnar <mingo@elte.hu>2009-07-10 05:59:42 -0400
commit92cf9f8f7e89c6bdbb1a724f879b8b18fc0dfe0f (patch)
treecb7f7598bc6c9fade407b24fcbf1a83a92a997b7 /kernel/trace/trace_ksym.c
parentf088e5471297cc78d7465e1fd997cb1a91a48019 (diff)
ksym_tracer: Fix validation of length of access type
Don't take newline into account, otherwise: # echo 'pid_max:-w-' > ksym_trace_filter # echo -n 'pid_max:rw-' > ksym_trace_filter bash: echo: write error: Invalid argument Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "K.Prasad" <prasad@linux.vnet.ibm.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4A52E2EB.9070503@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_ksym.c')
-rw-r--r--kernel/trace/trace_ksym.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/kernel/trace/trace_ksym.c b/kernel/trace/trace_ksym.c
index 955600929907..72fcb46c39c0 100644
--- a/kernel/trace/trace_ksym.c
+++ b/kernel/trace/trace_ksym.c
@@ -158,21 +158,21 @@ static int ksym_trace_get_access_type(char *str)
158static int parse_ksym_trace_str(char *input_string, char **ksymname, 158static int parse_ksym_trace_str(char *input_string, char **ksymname,
159 unsigned long *addr) 159 unsigned long *addr)
160{ 160{
161 char *delimiter = ":";
162 int ret; 161 int ret;
163 162
164 ret = -EINVAL; 163 strstrip(input_string);
165 *ksymname = strsep(&input_string, delimiter); 164
165 *ksymname = strsep(&input_string, ":");
166 *addr = kallsyms_lookup_name(*ksymname); 166 *addr = kallsyms_lookup_name(*ksymname);
167 167
168 /* Check for malformed request: (2), (1) and (5) */ 168 /* Check for malformed request: (2), (1) and (5) */
169 if ((!input_string) || 169 if ((!input_string) ||
170 (strlen(input_string) != (KSYM_TRACER_OP_LEN + 1)) || 170 (strlen(input_string) != KSYM_TRACER_OP_LEN) ||
171 (*addr == 0)) 171 (*addr == 0))
172 goto return_code; 172 return -EINVAL;;
173
173 ret = ksym_trace_get_access_type(input_string); 174 ret = ksym_trace_get_access_type(input_string);
174 175
175return_code:
176 return ret; 176 return ret;
177} 177}
178 178