Hello, syzbot found the following crash on: HEAD commit: 7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=128a9df2100000 kernel config: https://syzkaller.appspot.com/x/.config?x=9a1aa05456dfd557 dashboard link: https://syzkaller.appspot.com/bug?extid=b005af2cfb0411e617de compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17304a96100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=168a9df2100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b005af2cfb0411e617de@xxxxxxxxxxxxxxxxxxxxxxxxx executing program executing program executing program BUG: memory leak unreferenced object 0xffff88811c797900 (size 128): comm "syz-executor256", pid 6458, jiffies 4294947022 (age 13.050s) 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 00 00 00 00 00 00 00 00 ................ backtrace: [<000000004276332a>] kmalloc include/linux/slab.h:555 [inline] [<000000004276332a>] kzalloc include/linux/slab.h:669 [inline] [<000000004276332a>] ctnetlink_alloc_filter+0x3a/0x2a0 net/netfilter/nf_conntrack_netlink.c:924 [<000000000047e6fb>] ctnetlink_start+0x3a/0x80 net/netfilter/nf_conntrack_netlink.c:998 [<00000000a431a924>] __netlink_dump_start+0x1a3/0x2e0 net/netlink/af_netlink.c:2343 [<0000000016b073fa>] netlink_dump_start include/linux/netlink.h:246 [inline] [<0000000016b073fa>] ctnetlink_get_conntrack+0x26d/0x2f0 net/netfilter/nf_conntrack_netlink.c:1611 [<00000000d311138b>] nfnetlink_rcv_msg+0x32f/0x370 net/netfilter/nfnetlink.c:229 [<0000000008feca87>] netlink_rcv_skb+0x5a/0x180 net/netlink/af_netlink.c:2469 [<0000000088caad78>] nfnetlink_rcv+0x83/0x1b0 net/netfilter/nfnetlink.c:563 [<0000000052160488>] netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] [<0000000052160488>] netlink_unicast+0x20a/0x2f0 net/netlink/af_netlink.c:1329 [<00000000ee36d991>] netlink_sendmsg+0x2b5/0x560 net/netlink/af_netlink.c:1918 [<00000000dee2cafe>] sock_sendmsg_nosec net/socket.c:652 [inline] [<00000000dee2cafe>] sock_sendmsg+0x4c/0x60 net/socket.c:672 [<00000000b0b655cb>] ____sys_sendmsg+0x2c4/0x2f0 net/socket.c:2352 [<000000005bba2f8d>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2406 [<0000000060ac6563>] __sys_sendmsg+0x77/0xe0 net/socket.c:2439 [<000000002f7b34b0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000941009bb>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 --- 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@xxxxxxxxxxxxxxxx. 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
