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Fix memory leak in posix_clock_open()

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commit 5b4cdd9c56 upstream.

If the clk ops.open() function returns an error, we don't release the
pccontext we allocated for this clock.

Re-organize the code slightly to make it all more obvious.

Reported-by: Rohit Keshri <rkeshri@redhat.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Fixes: 60c6946675 ("posix-clock: introduce posix_clock_context concept")
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Torvalds 2024-03-26 14:59:48 -07:00 committed by Greg Kroah-Hartman
parent 3e52444ed1
commit 0200dd7ed2
1 changed files with 9 additions and 7 deletions
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16
kernel/time/posix-clock.c
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@ -129,15 +129,17 @@ static int posix_clock_open(struct inode *inode, struct file *fp)
goto out;
}
pccontext->clk = clk;
fp->private_data = pccontext;
if (clk->ops.open)
if (clk->ops.open) {
err = clk->ops.open(pccontext, fp->f_mode);
else
err = 0;
if (!err) {
get_device(clk->dev);
if (err) {
kfree(pccontext);
goto out;
}
}
fp->private_data = pccontext;
get_device(clk->dev);
err = 0;
out:
up_read(&clk->rwsem);
return err;