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net: rose: fix invalid array index in rose_kill_by_device()

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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>
This commit is contained in:
Pwnverse 2025-12-22 21:22:27 +00:00 committed by Paolo Abeni
parent 5939b6dbcd
commit 6595beb40f
1 changed files with 1 additions and 1 deletions
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2
net/rose/af_rose.c
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@ -205,7 +205,7 @@ 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);