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Tue, 21 Jan 2020 11:27:10 -0800 (PST) Date: Tue, 21 Jan 2020 11:27:10 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f35c6a059cab64c5@google.com> Subject: memory leak in mrp_request_join From: syzbot To: allison@lohutok.net, davem@davemloft.net, keescook@chromium.org, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pankaj.laxminarayan.bharadiya@intel.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: d96d875e Merge tag 'fixes_for_v5.5-rc8' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14cd8185e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=15478c61c836a72e dashboard link: https://syzkaller.appspot.com/bug?extid=5cfab121b54dff775399 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14dbe201e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13e03cf1e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+5cfab121b54dff775399@syzkaller.appspotmail.com executing program BUG: memory leak unreferenced object 0xffff888120b85c40 (size 64): comm "syz-executor783", pid 7302, jiffies 4294942613 (age 14.030s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 01 00 00 00 01 02 00 00 ................ backtrace: [<000000000312cb0f>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000000312cb0f>] slab_post_alloc_hook mm/slab.h:586 [inline] [<000000000312cb0f>] slab_alloc mm/slab.c:3320 [inline] [<000000000312cb0f>] __do_kmalloc mm/slab.c:3654 [inline] [<000000000312cb0f>] __kmalloc+0x169/0x300 mm/slab.c:3665 [<0000000011736472>] kmalloc include/linux/slab.h:561 [inline] [<0000000011736472>] mrp_attr_create net/802/mrp.c:276 [inline] [<0000000011736472>] mrp_request_join+0x13d/0x220 net/802/mrp.c:530 [<000000003ff9bf8f>] vlan_mvrp_request_join+0x86/0x90 net/8021q/vlan_mvrp.c:40 [<0000000020a13a26>] vlan_dev_open+0x154/0x290 net/8021q/vlan_dev.c:293 [<0000000010d96d5d>] __dev_open+0x109/0x1b0 net/core/dev.c:1431 [<00000000e9578876>] __dev_change_flags+0x246/0x2c0 net/core/dev.c:8103 [<000000002c92e0e1>] rtnl_configure_link+0x57/0x100 net/core/rtnetlink.c:2996 [<000000000504898e>] __rtnl_newlink+0x8b9/0xb80 net/core/rtnetlink.c:3323 [<00000000eb645fa3>] rtnl_newlink+0x4e/0x80 net/core/rtnetlink.c:3363 [<0000000034f28a5d>] rtnetlink_rcv_msg+0x178/0x4b0 net/core/rtnetlink.c:5424 [<00000000dc499e73>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477 [<00000000b6cd4d73>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5442 [<0000000092a30a6a>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] [<0000000092a30a6a>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328 [<0000000006ceb85b>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917 [<000000009199ec36>] sock_sendmsg_nosec net/socket.c:639 [inline] [<000000009199ec36>] sock_sendmsg+0x54/0x70 net/socket.c:659 [<000000002acd085e>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2330 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches