https://github.com/torvalds/linux
Revision 74e7e1efdad45580cc3839f2a155174cf158f9b5 authored by Juergen Gross on 06 December 2022, 07:54:24 UTC, committed by Juergen Gross on 06 December 2022, 15:00:33 UTC
It is not allowed to call kfree_skb() from hardware interrupt
context or with interrupts being disabled. So remove kfree_skb()
from the spin_lock_irqsave() section and use the already existing
"drop" label in xenvif_start_xmit() for dropping the SKB. At the
same time replace the dev_kfree_skb() call there with a call of
dev_kfree_skb_any(), as xenvif_start_xmit() can be called with
disabled interrupts.

This is XSA-424 / CVE-2022-42328 / CVE-2022-42329.

Fixes: be81992f9086 ("xen/netback: don't queue unlimited number of packages")
Reported-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
1 parent ad7f402
History
Tip revision: 74e7e1efdad45580cc3839f2a155174cf158f9b5 authored by Juergen Gross on 06 December 2022, 07:54:24 UTC
xen/netback: don't call kfree_skb() with interrupts disabled
Tip revision: 74e7e1e
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.clang-format -rw-r--r-- 19.9 KB
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.rustfmt.toml -rw-r--r-- 369 bytes
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