Hello, syzbot found the following issue on: HEAD commit: a68a0262 mm/madvise: remove racy mm ownership check git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=165b9413500000 kernel config: https://syzkaller.appspot.com/x/.config?x=4305fa9ea70c7a9f dashboard link: https://syzkaller.appspot.com/bug?extid=cfa88ddd0655afa88763 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1180a237500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=114067cf500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cfa88ddd0655afa88763@xxxxxxxxxxxxxxxxxxxxxxxxx Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. executing program executing program BUG: memory leak unreferenced object 0xffff88810f897940 (size 64): comm "syz-executor991", pid 8502, jiffies 4294942194 (age 14.080s) hex dump (first 32 bytes): 7f 00 00 00 80 00 00 00 00 00 00 00 00 00 00 00 ................ 00 a0 37 0c 81 88 ff ff 00 00 00 00 00 00 00 00 ..7............. backtrace: [<00000000639d0dd1>] xskq_create+0x23/0xd0 include/linux/slab.h:552 [<00000000b680b035>] xsk_init_queue net/xdp/xsk.c:508 [inline] [<00000000b680b035>] xsk_setsockopt+0x1c4/0x590 net/xdp/xsk.c:875 [<000000002b302260>] __sys_setsockopt+0x1b0/0x360 net/socket.c:2132 [<00000000ae03723e>] __do_sys_setsockopt net/socket.c:2143 [inline] [<00000000ae03723e>] __se_sys_setsockopt net/socket.c:2140 [inline] [<00000000ae03723e>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2140 [<0000000005c2b4a0>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 [<0000000003db140f>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810f8979c0 (size 64): comm "syz-executor991", pid 8503, jiffies 4294942194 (age 14.080s) hex dump (first 32 bytes): ff 03 00 00 00 04 00 00 00 00 00 00 00 00 00 00 ................ 00 00 13 12 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000639d0dd1>] xskq_create+0x23/0xd0 include/linux/slab.h:552 [<00000000b680b035>] xsk_init_queue net/xdp/xsk.c:508 [inline] [<00000000b680b035>] xsk_setsockopt+0x1c4/0x590 net/xdp/xsk.c:875 [<000000002b302260>] __sys_setsockopt+0x1b0/0x360 net/socket.c:2132 [<00000000ae03723e>] __do_sys_setsockopt net/socket.c:2143 [inline] [<00000000ae03723e>] __se_sys_setsockopt net/socket.c:2140 [inline] [<00000000ae03723e>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2140 [<0000000005c2b4a0>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 [<0000000003db140f>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
