Pavel Skripkin c47cc30499 net: kcm: fix memory leak in kcm_sendmsg ... Syzbot reported memory leak in kcm_sendmsg()[1]. The problem was in non-freed frag_list in case of error. In the while loop: if (head == skb) skb_shinfo(head)->frag_list = tskb; else skb->next = tskb; frag_list filled with skbs, but nothing was freeing them. backtrace: [<0000000094c02615>] __alloc_skb+0x5e/0x250 net/core/skbuff.c:198 [<00000000e5386cbd>] alloc_skb include/linux/skbuff.h:1083 [inline] [<00000000e5386cbd>] kcm_sendmsg+0x3b6/0xa50 net/kcm/kcmsock.c:967 [1] [<00000000f1613a8a>] sock_sendmsg_nosec net/socket.c:652 [inline] [<00000000f1613a8a>] sock_sendmsg+0x4c/0x60 net/socket.c:672 Reported-and-tested-by: syzbot+b039f5699bd82e1fb011@syzkaller.appspotmail.com Fixes: ab7ac4eb98 ("kcm: Kernel Connection Multiplexor module") Cc: stable@vger.kernel.org Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2021-06-03 14:13:26 -07:00
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kcmproc.c	net: kcm: kcmproc.c: Fix RCU list suspicious usage warning	2020-03-16 17:14:02 -07:00
kcmsock.c	net: kcm: fix memory leak in kcm_sendmsg	2021-06-03 14:13:26 -07:00
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00