Skip to content
Commit 9a9e7749 authored by Anant Thazhemadam's avatar Anant Thazhemadam Committed by David S. Miller
Browse files

net: team: fix memory leak in __team_options_register



The variable "i" isn't initialized back correctly after the first loop
under the label inst_rollback gets executed.

The value of "i" is assigned to be option_count - 1, and the ensuing
loop (under alloc_rollback) begins by initializing i--.
Thus, the value of i when the loop begins execution will now become
i = option_count - 2.

Thus, when kfree(dst_opts[i]) is called in the second loop in this
order, (i.e., inst_rollback followed by alloc_rollback),
dst_optsp[option_count - 2] is the first element freed, and
dst_opts[option_count - 1] does not get freed, and thus, a memory
leak is caused.

This memory leak can be fixed, by assigning i = option_count (instead of
option_count - 1).

Fixes: 80f7c668 ("team: add support for per-port options")
Reported-by: default avatar <syzbot+69b804437cfec30deac3@syzkaller.appspotmail.com>
Tested-by: default avatar <syzbot+69b804437cfec30deac3@syzkaller.appspotmail.com>
Signed-off-by: default avatarAnant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 790ca79d
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment