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Message-ID: <20150825151841.GB29462@redhat.com>
Date: Tue, 25 Aug 2015 17:18:41 +0200
From: Oleg Nesterov <oleg@...hat.com>
To: Rusty Russell <rusty@...tcorp.com.au>
Cc: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
Ingo Molnar <mingo@...hat.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Peter Zijlstra <peterz@...radead.org>,
Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] params: don't ignore the rest of cmdline if
parse_one() fails
parse_args() just aborts after it hits an error, so other args
at the same initcall level are simply ignored. This can lead to
other hard-to-understand problems, for example my testing machine
panics during the boot if I pass "locktorture.verbose=true".
Change parse_args() to save the err code for return and continue.
Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---
kernel/params.c | 17 +++++++++--------
1 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/kernel/params.c b/kernel/params.c
index a22d6a7..b21139f 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -223,7 +223,7 @@ char *parse_args(const char *doing,
int (*unknown)(char *param, char *val,
const char *doing, void *arg))
{
- char *param, *val;
+ char *param, *val, *err = NULL;
/* Chew leading spaces */
args = skip_spaces(args);
@@ -238,7 +238,7 @@ char *parse_args(const char *doing,
args = next_arg(args, ¶m, &val);
/* Stop at -- */
if (!val && strcmp(param, "--") == 0)
- return args;
+ return err ?: args;
irq_was_disabled = irqs_disabled();
ret = parse_one(param, val, doing, params, num,
min_level, max_level, arg, unknown);
@@ -247,24 +247,25 @@ char *parse_args(const char *doing,
doing, param);
switch (ret) {
+ case 0:
+ continue;
case -ENOENT:
pr_err("%s: Unknown parameter `%s'\n", doing, param);
- return ERR_PTR(ret);
+ break;
case -ENOSPC:
pr_err("%s: `%s' too large for parameter `%s'\n",
doing, val ?: "", param);
- return ERR_PTR(ret);
- case 0:
break;
default:
pr_err("%s: `%s' invalid for parameter `%s'\n",
doing, val ?: "", param);
- return ERR_PTR(ret);
+ break;
}
+
+ err = ERR_PTR(ret);
}
- /* All parsed OK. */
- return NULL;
+ return err;
}
/* Lazy bastard, eh? */
--
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