Hello, syzbot found the following issue on: HEAD commit: 7993e65fdd0f Merge tag 'mtd/fixes-for-5.17-rc5' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12b8d5bc700000 kernel config: https://syzkaller.appspot.com/x/.config?x=6668288739b7ad26 dashboard link: https://syzkaller.appspot.com/bug?extid=7085977fe51df63eb2bf compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17eae25a700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17a51236700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7085977fe51df63eb2bf@xxxxxxxxxxxxxxxxxxxxxxxxx executing program executing program executing program executing program executing program BUG: memory leak unreferenced object 0xffff888112ec56c0 (size 192): comm "syz-executor313", pid 30410, jiffies 4294958360 (age 18.100s) 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 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff816515c6>] kmalloc_node include/linux/slab.h:599 [inline] [<ffffffff816515c6>] kzalloc_node include/linux/slab.h:726 [inline] [<ffffffff816515c6>] create_io_worker+0x46/0x250 fs/io-wq.c:812 [<ffffffff81652ab2>] create_worker_cb+0xd2/0xf0 fs/io-wq.c:331 [<ffffffff81273853>] task_work_run+0x73/0xb0 kernel/task_work.c:164 [<ffffffff8163dadd>] tracehook_notify_signal include/linux/tracehook.h:213 [inline] [<ffffffff8163dadd>] io_run_task_work fs/io_uring.c:2595 [inline] [<ffffffff8163dadd>] io_run_task_work fs/io_uring.c:2591 [inline] [<ffffffff8163dadd>] io_run_task_work_sig+0x6d/0x110 fs/io_uring.c:7684 [<ffffffff8164ec75>] io_cqring_wait_schedule fs/io_uring.c:7701 [inline] [<ffffffff8164ec75>] io_cqring_wait fs/io_uring.c:7770 [inline] [<ffffffff8164ec75>] __do_sys_io_uring_enter+0x715/0xf60 fs/io_uring.c:10178 [<ffffffff844b4875>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff844b4875>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae --- 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
