5.4-stable review patch. If anyone has any objections, please let me know.
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From: Corey Minyard corey@minyard.net
[ Upstream commit 8ffcb7560b4a15faf821df95e3ab532b2b020f8c ]
The source and destination of some strcpy operations was the same. Split out the part of the operations that needed to be done for those particular calls so the unnecessary copy wasn't done.
Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202506140756.EFXXvIP4-lkp@intel.com/ Signed-off-by: Corey Minyard corey@minyard.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/char/ipmi/ipmi_watchdog.c | 59 ++++++++++++++++++++++--------- 1 file changed, 42 insertions(+), 17 deletions(-)
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c index ccb62c480bdd..ac2099f3f41a 100644 --- a/drivers/char/ipmi/ipmi_watchdog.c +++ b/drivers/char/ipmi/ipmi_watchdog.c @@ -1192,14 +1192,8 @@ static struct ipmi_smi_watcher smi_watcher = { .smi_gone = ipmi_smi_gone };
-static int action_op(const char *inval, char *outval) +static int action_op_set_val(const char *inval) { - if (outval) - strcpy(outval, action); - - if (!inval) - return 0; - if (strcmp(inval, "reset") == 0) action_val = WDOG_TIMEOUT_RESET; else if (strcmp(inval, "none") == 0) @@ -1210,18 +1204,26 @@ static int action_op(const char *inval, char *outval) action_val = WDOG_TIMEOUT_POWER_DOWN; else return -EINVAL; - strcpy(action, inval); return 0; }
-static int preaction_op(const char *inval, char *outval) +static int action_op(const char *inval, char *outval) { + int rv; + if (outval) - strcpy(outval, preaction); + strcpy(outval, action);
if (!inval) return 0; + rv = action_op_set_val(inval); + if (!rv) + strcpy(action, inval); + return rv; +}
+static int preaction_op_set_val(const char *inval) +{ if (strcmp(inval, "pre_none") == 0) preaction_val = WDOG_PRETIMEOUT_NONE; else if (strcmp(inval, "pre_smi") == 0) @@ -1234,18 +1236,26 @@ static int preaction_op(const char *inval, char *outval) preaction_val = WDOG_PRETIMEOUT_MSG_INT; else return -EINVAL; - strcpy(preaction, inval); return 0; }
-static int preop_op(const char *inval, char *outval) +static int preaction_op(const char *inval, char *outval) { + int rv; + if (outval) - strcpy(outval, preop); + strcpy(outval, preaction);
if (!inval) return 0; + rv = preaction_op_set_val(inval); + if (!rv) + strcpy(preaction, inval); + return 0; +}
+static int preop_op_set_val(const char *inval) +{ if (strcmp(inval, "preop_none") == 0) preop_val = WDOG_PREOP_NONE; else if (strcmp(inval, "preop_panic") == 0) @@ -1254,7 +1264,22 @@ static int preop_op(const char *inval, char *outval) preop_val = WDOG_PREOP_GIVE_DATA; else return -EINVAL; - strcpy(preop, inval); + return 0; +} + +static int preop_op(const char *inval, char *outval) +{ + int rv; + + if (outval) + strcpy(outval, preop); + + if (!inval) + return 0; + + rv = preop_op_set_val(inval); + if (!rv) + strcpy(preop, inval); return 0; }
@@ -1291,18 +1316,18 @@ static int __init ipmi_wdog_init(void) { int rv;
- if (action_op(action, NULL)) { + if (action_op_set_val(action)) { action_op("reset", NULL); pr_info("Unknown action '%s', defaulting to reset\n", action); }
- if (preaction_op(preaction, NULL)) { + if (preaction_op_set_val(preaction)) { preaction_op("pre_none", NULL); pr_info("Unknown preaction '%s', defaulting to none\n", preaction); }
- if (preop_op(preop, NULL)) { + if (preop_op_set_val(preop)) { preop_op("preop_none", NULL); pr_info("Unknown preop '%s', defaulting to none\n", preop); }