On Thu, 2016-02-04 at 10:47 +0100, Dmitry Vyukov wrote: > Hello, > > I've hit the following memory leak while running syzkaller fuzzer: > > unreferenced object 0xffff88002ea39708 (size 64): > comm "syz-executor", pid 19887, jiffies 4295848369 (age 8.676s) > hex dump (first 32 bytes): > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 00 00 00 00 00 00 00 00 04 00 00 00 04 00 00 00 ................ > backtrace: > [< inline >] kzalloc include/linux/slab.h:607 > [< inline >] ip_options_get_alloc net/ipv4/ip_options.c:515 > [<ffffffff85836ea4>] ip_options_get+0x34/0x90 net/ipv4/ip_options.c:551 > [<ffffffff8584924d>] ip_cmsg_send+0x5bd/0x6f0 net/ipv4/ip_sockglue.c:252 > [<ffffffff858e8502>] raw_sendmsg+0xa52/0x25a0 net/ieee802154/socket.c:738 > [<ffffffff859246e7>] inet_sendmsg+0x2f7/0x4c0 net/ipv4/af_inet.c:736 > [< inline >] sock_sendmsg_nosec net/socket.c:611 > [<ffffffff854cdffa>] sock_sendmsg+0xca/0x110 net/socket.c:621 > [<ffffffff854cfe3a>] ___sys_sendmsg+0x72a/0x840 net/socket.c:1947 > [<ffffffff854d1e0e>] __sys_sendmsg+0xce/0x170 net/socket.c:1981 > [< inline >] SYSC_sendmsg net/socket.c:1992 > [<ffffffff854d1edd>] SyS_sendmsg+0x2d/0x50 net/socket.c:1988 > > ip_cmsg_send seems to forget to free ipc->opt when it returns an error > (all callers expect that there is nothing to cleanup if it returns an > error). > > On commit 34229b277480f46c1e9a19f027f30b074512e68b.
Hmmm... thanks for the report, I am testing a patch.
