Chun-Yi Lee 74ca3ef68d aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts ... [ Upstream commit f98364e926 ] This patch is against CVE-2023-6270. The description of cve is: A flaw was found in the ATA over Ethernet (AoE) driver in the Linux kernel. The aoecmd_cfg_pkts() function improperly updates the refcnt on `struct net_device`, and a use-after-free can be triggered by racing between the free on the struct and the access through the `skbtxq` global queue. This could lead to a denial of service condition or potential code execution. In aoecmd_cfg_pkts(), it always calls dev_put(ifp) when skb initial code is finished. But the net_device ifp will still be used in later tx()->dev_queue_xmit() in kthread. Which means that the dev_put(ifp) should NOT be called in the success path of skb initial code in aoecmd_cfg_pkts(). Otherwise tx() may run into use-after-free because the net_device is freed. This patch removed the dev_put(ifp) in the success path in aoecmd_cfg_pkts(), and added dev_put() after skb xmit in tx(). Link: https://nvd.nist.gov/vuln/detail/CVE-2023-6270 Fixes: 7562f876cd ("[NET]: Rework dev_base via list_head (v3)") Signed-off-by: Chun-Yi Lee <jlee@suse.com> Link: https://lore.kernel.org/r/20240305082048.25526-1-jlee@suse.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-03-26 18:20:29 -04:00
..
Makefile	…
aoe.h	…
aoeblk.c	…
aoechr.c	…
aoecmd.c	aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts	2024-03-26 18:20:29 -04:00
aoedev.c	…
aoemain.c	…
aoenet.c	aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts	2024-03-26 18:20:29 -04:00