Merge tag 'nfs-rdma-for-4.0-3' of git://git.linux-nfs.org/projects/anna/nfs-rdma

[firefly-linux-kernel-4.4.55.git] / kernel / debug / kdb / kdb_main.c

diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index c6d2c0b1565d67ab2fa94b86ef0a28533bb5cabc..4121345498e0e48f10b414a4b12e0b5f15daeabd 100644 (file)
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -50,8 +50,7 @@
 static int kdb_cmd_enabled = CONFIG_KDB_DEFAULT_ENABLE;
 module_param_named(cmd_enable, kdb_cmd_enabled, int, 0600);
 
-#define GREP_LEN 256
-char kdb_grep_string[GREP_LEN];
+char kdb_grep_string[KDB_GREP_STRLEN];
 int kdb_grepping_flag;
 EXPORT_SYMBOL(kdb_grepping_flag);
 int kdb_grep_leading;
@@ -870,7 +869,7 @@ static void parse_grep(const char *str)
        len = strlen(cp);
        if (!len)
                return;
-       if (len >= GREP_LEN) {
+       if (len >= KDB_GREP_STRLEN) {
                kdb_printf("search string too long\n");
                return;
        }
@@ -915,13 +914,12 @@ int kdb_parse(const char *cmdstr)
        char *cp;
        char *cpp, quoted;
        kdbtab_t *tp;
-       int i, escaped, ignore_errors = 0, check_grep;
+       int i, escaped, ignore_errors = 0, check_grep = 0;
 
        /*
         * First tokenize the command string.
         */
        cp = (char *)cmdstr;
-       kdb_grepping_flag = check_grep = 0;
 
        if (KDB_FLAG(CMD_INTERRUPT)) {
                /* Previous command was interrupted, newline must not
@@ -1247,7 +1245,6 @@ static int kdb_local(kdb_reason_t reason, int error, struct pt_regs *regs,
                kdb_printf("due to NonMaskable Interrupt @ "
                           kdb_machreg_fmt "\n",
                           instruction_pointer(regs));
-               kdb_dumpregs(regs);
                break;
        case KDB_REASON_SSTEP:
        case KDB_REASON_BREAK:
@@ -1281,6 +1278,9 @@ static int kdb_local(kdb_reason_t reason, int error, struct pt_regs *regs,
                 */
                kdb_nextline = 1;
                KDB_STATE_CLEAR(SUPPRESS);
+               kdb_grepping_flag = 0;
+               /* ensure the old search does not leak into '/' commands */
+               kdb_grep_string[0] = '\0';
 
                cmdbuf = cmd_cur;
                *cmdbuf = '\0';
@@ -2256,7 +2256,7 @@ static int kdb_cpu(int argc, const char **argv)
        /*
         * Validate cpunum
         */
-       if ((cpunum > NR_CPUS) || !kgdb_info[cpunum].enter_kgdb)
+       if ((cpunum >= CONFIG_NR_CPUS) || !kgdb_info[cpunum].enter_kgdb)
                return KDB_BADCPUNUM;
 
        dbg_switch_cpu = cpunum;