This is a note to let you know that I've just added the patch titled
swiotlb-xen: avoid double free
to the 5.14-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:
swiotlb-xen-avoid-double-free.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ce6a80d1b2f923b1839655a1cda786293feaa085 Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@xxxxxxxx>
Date: Tue, 7 Sep 2021 14:04:25 +0200
Subject: swiotlb-xen: avoid double free
From: Jan Beulich <jbeulich@xxxxxxxx>
commit ce6a80d1b2f923b1839655a1cda786293feaa085 upstream.
Of the two paths leading to the "error" label in xen_swiotlb_init() one
didn't allocate anything, while the other did already free what was
allocated.
Fixes: b82776005369 ("xen/swiotlb: Use the swiotlb_late_init_with_tbl to init Xen-SWIOTLB late when PV PCI is used")
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Link: https://lore.kernel.org/r/ce9c2adb-8a52-6293-982a-0d6ece943ac6@xxxxxxxx
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/xen/swiotlb-xen.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -216,7 +216,6 @@ error:
goto retry;
}
pr_err("%s (rc:%d)\n", xen_swiotlb_error(m_ret), rc);
- free_pages((unsigned long)start, order);
return rc;
}
Patches currently in stable-queue which might be from jbeulich@xxxxxxxx are
queue-5.14/swiotlb-xen-fix-late-init-retry.patch
queue-5.14/swiotlb-xen-avoid-double-free.patch
