This is a note to let you know that I've just added the patch titled
Fix memory leak in posix_clock_open()
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
fix-memory-leak-in-posix_clock_open.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5b4cdd9c5676559b8a7c944ac5269b914b8c0bb8 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 26 Mar 2024 14:59:48 -0700
Subject: Fix memory leak in posix_clock_open()
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
commit 5b4cdd9c5676559b8a7c944ac5269b914b8c0bb8 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@xxxxxxxxxx>
Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Fixes: 60c6946675fc ("posix-clock: introduce posix_clock_context concept")
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/time/posix-clock.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
--- a/kernel/time/posix-clock.c
+++ b/kernel/time/posix-clock.c
@@ -129,15 +129,17 @@ static int posix_clock_open(struct inode
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;
Patches currently in stable-queue which might be from torvalds@xxxxxxxxxxxxxxxxxxxx are
queue-6.7/x86-cpu-amd-update-the-zenbleed-microcode-revisions.patch
queue-6.7/ring-buffer-fix-resetting-of-shortest_full.patch
queue-6.7/fix-memory-leak-in-posix_clock_open.patch
queue-6.7/ring-buffer-use-wait_event_interruptible-in-ring_buf.patch
queue-6.7/ring-buffer-fix-waking-up-ring-buffer-readers.patch
queue-6.7/tracing-use-.flush-call-to-wake-up-readers.patch
queue-6.7/x86-pm-work-around-false-positive-kmemleak-report-in.patch
