Hello, syzbot found the following issue on: HEAD commit: 1c7873e33645 mm: lock newly mapped VMA with corrected orde.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1517663ca80000 kernel config: https://syzkaller.appspot.com/x/.config?x=832b404e095b70c0 dashboard link: https://syzkaller.appspot.com/bug?extid=feb045d335c1fdde5bf7 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=1776519ca80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117f9778a80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/43b42bd2cf70/disk-1c7873e3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/011ba1b9e8c1/vmlinux-1c7873e3.xz kernel image: https://storage.googleapis.com/syzbot-assets/18b349342595/bzImage-1c7873e3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+feb045d335c1fdde5bf7@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff88810b172000 (size 4096): comm "syz-executor103", pid 5067, jiffies 4294964128 (age 13.070s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 bc 96 0e 81 88 ff ff ................ 5d b6 9e 85 ff ff ff ff 03 00 00 00 00 00 00 00 ]............... backtrace: [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076 [<ffffffff8347eb55>] kmalloc include/linux/slab.h:582 [inline] [<ffffffff8347eb55>] kzalloc include/linux/slab.h:703 [inline] [<ffffffff8347eb55>] dev_new drivers/usb/gadget/legacy/raw_gadget.c:191 [inline] [<ffffffff8347eb55>] raw_open+0x45/0x110 drivers/usb/gadget/legacy/raw_gadget.c:385 [<ffffffff827d1d09>] misc_open+0x1a9/0x1f0 drivers/char/misc.c:165 [<ffffffff8166763b>] chrdev_open+0x11b/0x340 fs/char_dev.c:414 [<ffffffff8165573f>] do_dentry_open+0x30f/0x990 fs/open.c:914 [<ffffffff8167cabb>] do_open fs/namei.c:3636 [inline] [<ffffffff8167cabb>] path_openat+0x178b/0x1b20 fs/namei.c:3793 [<ffffffff8167e995>] do_filp_open+0xc5/0x1b0 fs/namei.c:3820 [<ffffffff81659453>] do_sys_openat2+0xe3/0x140 fs/open.c:1407 [<ffffffff81659de3>] do_sys_open fs/open.c:1422 [inline] [<ffffffff81659de3>] __do_sys_openat fs/open.c:1438 [inline] [<ffffffff81659de3>] __se_sys_openat fs/open.c:1433 [inline] [<ffffffff81659de3>] __x64_sys_openat+0x83/0xe0 fs/open.c:1433 [<ffffffff84a77ff9>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84a77ff9>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd BUG: memory leak unreferenced object 0xffff88810ad20d60 (size 32): comm "syz-executor103", pid 5067, jiffies 4294964128 (age 13.070s) hex dump (first 32 bytes): 72 61 77 2d 67 61 64 67 65 74 2e 30 00 00 00 00 raw-gadget.0.... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076 [<ffffffff8347cd2f>] kmalloc include/linux/slab.h:582 [inline] [<ffffffff8347cd2f>] raw_ioctl_init+0xdf/0x410 drivers/usb/gadget/legacy/raw_gadget.c:460 [<ffffffff8347dfe9>] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250 [<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81685173>] __do_sys_ioctl fs/ioctl.c:870 [inline] [<ffffffff81685173>] __se_sys_ioctl fs/ioctl.c:856 [inline] [<ffffffff81685173>] __x64_sys_ioctl+0x103/0x140 fs/ioctl.c:856 [<ffffffff84a77ff9>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84a77ff9>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd BUG: memory leak unreferenced object 0xffff88810e96bc00 (size 128): comm "syz-executor103", pid 5067, jiffies 4294964128 (age 13.070s) hex dump (first 32 bytes): 64 75 6d 6d 79 5f 75 64 63 00 00 00 00 00 00 00 dummy_udc....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076 [<ffffffff8347cd6d>] kmalloc include/linux/slab.h:582 [inline] [<ffffffff8347cd6d>] raw_ioctl_init+0x11d/0x410 drivers/usb/gadget/legacy/raw_gadget.c:468 [<ffffffff8347dfe9>] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250 [<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81685173>] __do_sys_ioctl fs/ioctl.c:870 [inline] [<ffffffff81685173>] __se_sys_ioctl fs/ioctl.c:856 [inline] [<ffffffff81685173>] __x64_sys_ioctl+0x103/0x140 fs/ioctl.c:856 [<ffffffff84a77ff9>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84a77ff9>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd BUG: memory leak unreferenced object 0xffff88810e96ba80 (size 128): comm "syz-executor103", pid 5067, jiffies 4294964128 (age 13.070s) hex dump (first 32 bytes): 64 75 6d 6d 79 5f 75 64 63 2e 30 00 00 00 00 00 dummy_udc.0..... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076 [<ffffffff8347cdfc>] kmalloc include/linux/slab.h:582 [inline] [<ffffffff8347cdfc>] raw_ioctl_init+0x1ac/0x410 drivers/usb/gadget/legacy/raw_gadget.c:479 [<ffffffff8347dfe9>] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250 [<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81685173>] __do_sys_ioctl fs/ioctl.c:870 [inline] [<ffffffff81685173>] __se_sys_ioctl fs/ioctl.c:856 [inline] [<ffffffff81685173>] __x64_sys_ioctl+0x103/0x140 fs/ioctl.c:856 [<ffffffff84a77ff9>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84a77ff9>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd BUG: memory leak unreferenced object 0xffff88810e96bd00 (size 128): comm "syz-executor103", pid 5067, jiffies 4294964128 (age 13.070s) hex dump (first 32 bytes): 00 bd 96 0e 81 88 ff ff 00 bd 96 0e 81 88 ff ff ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076 [<ffffffff833ecc6a>] kmalloc include/linux/slab.h:582 [inline] [<ffffffff833ecc6a>] kzalloc include/linux/slab.h:703 [inline] [<ffffffff833ecc6a>] dummy_alloc_request+0x5a/0xe0 drivers/usb/gadget/udc/dummy_hcd.c:665 [<ffffffff833e9132>] usb_ep_alloc_request+0x22/0xd0 drivers/usb/gadget/udc/core.c:196 [<ffffffff8347f13d>] gadget_bind+0x6d/0x370 drivers/usb/gadget/legacy/raw_gadget.c:292 [<ffffffff833e9e83>] gadget_bind_driver+0xe3/0x2e0 drivers/usb/gadget/udc/core.c:1591 [<ffffffff82ba069d>] call_driver_probe drivers/base/dd.c:579 [inline] [<ffffffff82ba069d>] really_probe+0x12d/0x430 drivers/base/dd.c:658 [<ffffffff82ba0a61>] __driver_probe_device+0xc1/0x1a0 drivers/base/dd.c:798 [<ffffffff82ba0b6a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:828 [<ffffffff82ba0eae>] __driver_attach drivers/base/dd.c:1214 [inline] [<ffffffff82ba0eae>] __driver_attach+0xfe/0x1f0 drivers/base/dd.c:1154 [<ffffffff82b9d985>] bus_for_each_dev+0xa5/0x110 drivers/base/bus.c:368 [<ffffffff82b9f486>] bus_add_driver+0x126/0x2a0 drivers/base/bus.c:673 [<ffffffff82ba25da>] driver_register+0x8a/0x190 drivers/base/driver.c:246 [<ffffffff833e7524>] usb_gadget_register_driver_owner+0x64/0x160 drivers/usb/gadget/udc/core.c:1665 [<ffffffff8347e0e6>] raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:546 [inline] [<ffffffff8347e0e6>] raw_ioctl+0x6f6/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1253 [<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81685173>] __do_sys_ioctl fs/ioctl.c:870 [inline] [<ffffffff81685173>] __se_sys_ioctl fs/ioctl.c:856 [inline] [<ffffffff81685173>] __x64_sys_ioctl+0x103/0x140 fs/ioctl.c:856 [<ffffffff84a77ff9>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84a77ff9>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 --- 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. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
