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ksym_tracer: Fix validation of length of access type

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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>
This commit is contained in:
Li Zefan 2009-07-07 13:53:47 +08:00 committed by Ingo Molnar
parent f088e54712
commit 92cf9f8f7e
1 changed files with 7 additions and 7 deletions
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14
kernel/trace/trace_ksym.c
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@ -158,21 +158,21 @@ static int ksym_trace_get_access_type(char *str)
static int parse_ksym_trace_str(char *input_string, char **ksymname,
unsigned long *addr)
{
char *delimiter = ":";
int ret;
ret = -EINVAL;
*ksymname = strsep(&input_string, delimiter);
strstrip(input_string);
*ksymname = strsep(&input_string, ":");
*addr = kallsyms_lookup_name(*ksymname);
/* Check for malformed request: (2), (1) and (5) */
if ((!input_string) ||
(strlen(input_string) != (KSYM_TRACER_OP_LEN + 1)) ||
(*addr == 0))
goto return_code;
(strlen(input_string) != KSYM_TRACER_OP_LEN) ||
(*addr == 0))
return -EINVAL;;
ret = ksym_trace_get_access_type(input_string);
return_code:
return ret;
}