path: root/fs
diff options
authorLinus Torvalds <torvalds@linux-foundation.org>2020-01-10 13:25:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-10 13:25:24 -0800
commit9fb7007de8a2a80e4b55a850311fca10de62f1b5 (patch)
tree385d22388e16847c4fc6c4694099ffd374f1012d /fs
parent7da37cd0520e71707a1190022377941b9cec3b0b (diff)
parent68faa679b8be1a74e6663c21c3a9d25d32f1c079 (diff)
Merge tag 'char-misc-5.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc fix from Greg KH: "Here is a single fix, for the chrdev core, for 5.5-rc6 There's been a long-standing race condition triggered by syzbot, and occasionally real people, in the chrdev open() path. Will finally took the time to track it down and fix it for real before the holidays. Here's that one patch, it's been in linux-next for a while with no reported issues and it does fix the reported problem" * tag 'char-misc-5.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: chardev: Avoid potential use-after-free in 'chrdev_open()'
Diffstat (limited to 'fs')
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/char_dev.c b/fs/char_dev.c
index 00dfe17871ac..c5e6eff5a381 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -352,7 +352,7 @@ static struct kobject *cdev_get(struct cdev *p)
if (owner && !try_module_get(owner))
return NULL;
- kobj = kobject_get(&p->kobj);
+ kobj = kobject_get_unless_zero(&p->kobj);
if (!kobj)
return kobj;

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