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| author | Chun-Yi Lee <jlee@suse.com> | 2024-03-05 11:20:48 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-03-06 18:32:46 +0300 |
| commit | f98364e926626c678fb4b9004b75cacf92ff0662 (patch) | |
| tree | 5c74cb0123a7db87e631d35e05fa05e3682a1a03 /include/linux/fpga/fpga-mgr.h | |
| parent | b9355185d2aeef11f6e365dd98def82212637936 (diff) | |
| download | linux-f98364e926626c678fb4b9004b75cacf92ff0662.tar.xz | |
aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts
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: 7562f876cd93 ("[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>
Diffstat (limited to 'include/linux/fpga/fpga-mgr.h')
0 files changed, 0 insertions, 0 deletions