From: Pwnverse Date: Mon, 22 Dec 2025 21:22:27 +0000 (+0000) Subject: net: rose: fix invalid array index in rose_kill_by_device() X-Git-Tag: v5.15.198~192 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ed2639414d43ba037f798eaf619e878309310451;p=thirdparty%2Fkernel%2Fstable.git net: rose: fix invalid array index in rose_kill_by_device() [ 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 Signed-off-by: Fatma Alwasmi Signed-off-by: Pwnverse Link: https://patch.msgid.link/20251222212227.4116041-1-ritviktanksalkar@gmail.com Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c index f8cd085c42345..04173c85d92b5 100644 --- a/net/rose/af_rose.c +++ b/net/rose/af_rose.c @@ -204,7 +204,7 @@ start: 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);