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sysfs: turn WARN() into pr_warn()

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It's not good to crash the machine if panic_on_warn() is set just
because someone made a stupid mistake of trying to create a sysfs file
with the same name of an existing one.  This makes the automated testing
tools a lot harder to find the real bugs in the kernel.

So just print a warning out and dump the stack to get the attention of
the developer that they did something foolish.  Then keep on trucking,
as this should not be a fatal error at all.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2018-01-22 15:57:59 +01:00
parent a9afc573db
commit 5d54f948aa
1 changed files with 3 additions and 2 deletions
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5
fs/sysfs/dir.c
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@ -10,6 +10,7 @@
* Please see Documentation/filesystems/sysfs.txt for more information.
*/
#define pr_fmt(fmt) "sysfs: " fmt
#undef DEBUG
#include <linux/fs.h>
@ -27,8 +28,8 @@ void sysfs_warn_dup(struct kernfs_node *parent, const char *name)
if (buf)
kernfs_path(parent, buf, PATH_MAX);
WARN(1, KERN_WARNING "sysfs: cannot create duplicate filename '%s/%s'\n",
buf, name);
pr_warn("cannot create duplicate filename '%s/%s'\n", buf, name);
dump_stack();
kfree(buf);
}