]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
ax25: fix reference count leaks of ax25_dev
authorDuoming Zhou <duoming@zju.edu.cn>
Thu, 3 Feb 2022 15:08:11 +0000 (23:08 +0800)
committerJakub Kicinski <kuba@kernel.org>
Thu, 3 Feb 2022 22:20:36 +0000 (14:20 -0800)
commit87563a043cef044fed5db7967a75741cc16ad2b1
tree4afe345736b9d1e946ddd4ad5fdbc349b046900f
parent80d4609008e6d696a279e39ae7458c916fcd44c1
ax25: fix reference count leaks of ax25_dev

The previous commit d01ffb9eee4a ("ax25: add refcount in ax25_dev
to avoid UAF bugs") introduces refcount into ax25_dev, but there
are reference leak paths in ax25_ctl_ioctl(), ax25_fwd_ioctl(),
ax25_rt_add(), ax25_rt_del() and ax25_rt_opt().

This patch uses ax25_dev_put() and adjusts the position of
ax25_addr_ax25dev() to fix reference cout leaks of ax25_dev.

Fixes: d01ffb9eee4a ("ax25: add refcount in ax25_dev to avoid UAF bugs")
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220203150811.42256-1-duoming@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
include/net/ax25.h
net/ax25/af_ax25.c
net/ax25/ax25_dev.c
net/ax25/ax25_route.c