Hello, syzbot found the following issue on: HEAD commit: d6efb3ac Merge tag 'tty-5.9-rc1' of git://git.kernel.org/p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13cb0762900000 kernel config: https://syzkaller.appspot.com/x/.config?x=42163327839348a9 dashboard link: https://syzkaller.appspot.com/bug?extid=a730016dc0bdce4f6ff5 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16e877dc900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1608291a900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a730016dc0bdce4f6ff5@xxxxxxxxxxxxxxxxxxxxxxxxx executing program executing program executing program executing program executing program BUG: memory leak unreferenced object 0xffff888124949100 (size 256): comm "syz-executor808", pid 6480, jiffies 4294949911 (age 33.960s) hex dump (first 32 bytes): 00 78 74 2a 81 88 ff ff 00 00 00 00 00 00 00 00 .xt*............ 90 b0 51 81 ff ff ff ff 00 00 00 00 00 00 00 00 ..Q............. backtrace: [<0000000084e46f34>] io_alloc_req fs/io_uring.c:1503 [inline] [<0000000084e46f34>] io_submit_sqes+0x5dc/0xc00 fs/io_uring.c:6306 [<000000006d4e19eb>] __do_sys_io_uring_enter+0x582/0x830 fs/io_uring.c:8036 [<00000000a4116b07>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 [<0000000067b2aefc>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88811751d200 (size 96): comm "syz-executor808", pid 6480, jiffies 4294949911 (age 33.960s) hex dump (first 32 bytes): 00 78 74 2a 81 88 ff ff 00 00 00 00 00 00 00 00 .xt*............ 0e 01 00 00 00 00 75 22 00 00 00 00 00 0f 1f 04 ......u"........ backtrace: [<00000000073ea2ba>] kmalloc include/linux/slab.h:555 [inline] [<00000000073ea2ba>] io_arm_poll_handler fs/io_uring.c:4773 [inline] [<00000000073ea2ba>] __io_queue_sqe+0x445/0x6b0 fs/io_uring.c:5988 [<000000001551bde0>] io_queue_sqe+0x309/0x550 fs/io_uring.c:6060 [<000000002dfb908f>] io_submit_sqe fs/io_uring.c:6130 [inline] [<000000002dfb908f>] io_submit_sqes+0x8b8/0xc00 fs/io_uring.c:6327 [<000000006d4e19eb>] __do_sys_io_uring_enter+0x582/0x830 fs/io_uring.c:8036 [<00000000a4116b07>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 [<0000000067b2aefc>] 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
