Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 029/157] Bluetooth: cmtp: fix possible panic when cmtp_init_sockets() fails | Date | Mon, 24 Jan 2022 19:41:59 +0100 |
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From: Wang Hai <wanghai38@huawei.com>
[ Upstream commit 2a7ca7459d905febf519163bd9e3eed894de6bb7 ]
I got a kernel BUG report when doing fault injection test:
------------[ cut here ]------------ kernel BUG at lib/list_debug.c:45! ... RIP: 0010:__list_del_entry_valid.cold+0x12/0x4d ... Call Trace: proto_unregister+0x83/0x220 cmtp_cleanup_sockets+0x37/0x40 [cmtp] cmtp_exit+0xe/0x1f [cmtp] do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae
If cmtp_init_sockets() in cmtp_init() fails, cmtp_init() still returns success. This will cause a kernel bug when accessing uncreated ctmp related data when the module exits.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wang Hai <wanghai38@huawei.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- net/bluetooth/cmtp/core.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c index 0bb150e68c53f..e2e580c747f4b 100644 --- a/net/bluetooth/cmtp/core.c +++ b/net/bluetooth/cmtp/core.c @@ -499,9 +499,7 @@ static int __init cmtp_init(void) { BT_INFO("CMTP (CAPI Emulation) ver %s", VERSION); - cmtp_init_sockets(); - - return 0; + return cmtp_init_sockets(); } static void __exit cmtp_exit(void) -- 2.34.1
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