6.1-stable review patch. If anyone has any objections, please let me know.
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From: Pwnverse stanksal@purdue.edu
[ Upstream commit 6595beb40fb0ec47223d3f6058ee40354694c8e4 ]
rose_kill_by_device() collects sockets into a local array[] and then iterates over them to disconnect sockets bound to a device being brought down.
The loop mistakenly indexes array[cnt] instead of array[i]. For cnt < ARRAY_SIZE(array), this reads an uninitialized entry; for cnt == ARRAY_SIZE(array), it is an out-of-bounds read. Either case can lead to an invalid socket pointer dereference and also leaks references taken via sock_hold().
Fix the index to use i.
Fixes: 64b8bc7d5f143 ("net/rose: fix races in rose_kill_by_device()") Co-developed-by: Fatma Alwasmi falwasmi@purdue.edu Signed-off-by: Fatma Alwasmi falwasmi@purdue.edu Signed-off-by: Pwnverse stanksal@purdue.edu Link: https://patch.msgid.link/20251222212227.4116041-1-ritviktanksalkar@gmail.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/rose/af_rose.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c index 5a0bf022a84b..d13ec76a1fec 100644 --- a/net/rose/af_rose.c +++ b/net/rose/af_rose.c @@ -205,7 +205,7 @@ static void rose_kill_by_device(struct net_device *dev) spin_unlock_bh(&rose_list_lock);
for (i = 0; i < cnt; i++) { - sk = array[cnt]; + sk = array[i]; rose = rose_sk(sk); lock_sock(sk); spin_lock_bh(&rose_list_lock);