Hello, syzbot found the following issue on: HEAD commit: 22b8cc3e78f5 Merge tag 'x86_mm_for_6.4' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16fc7958280000 kernel config: https://syzkaller.appspot.com/x/.config?x=5046ebeca744dd40 dashboard link: https://syzkaller.appspot.com/bug?extid=e7afd76ad060fa0d2605 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=1599a2b4280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14eb395fc80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3ad2088c196b/disk-22b8cc3e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/61919a5b89c6/vmlinux-22b8cc3e.xz kernel image: https://storage.googleapis.com/syzbot-assets/a7adb5503ac8/bzImage-22b8cc3e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e7afd76ad060fa0d2605@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff88810af67080 (size 96): comm "kworker/0:2", pid 4402, jiffies 4294950769 (age 14.190s) hex dump (first 32 bytes): bf 03 9b 85 ff ff ff ff 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: [<ffffffff81544e14>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057 [<ffffffff82b65445>] kmalloc include/linux/slab.h:559 [inline] [<ffffffff82b65445>] kzalloc include/linux/slab.h:680 [inline] [<ffffffff82b65445>] class_create+0x25/0x90 drivers/base/class.c:261 [<ffffffff831f7a80>] init_usb_class drivers/usb/core/file.c:91 [inline] [<ffffffff831f7a80>] usb_register_dev+0x290/0x3d0 drivers/usb/core/file.c:179 [<ffffffff832cffc4>] usblp_probe+0x4e4/0x750 drivers/usb/class/usblp.c:1208 [<ffffffff831f39a9>] usb_probe_interface+0x179/0x3c0 drivers/usb/core/driver.c:396 [<ffffffff82b62d7d>] call_driver_probe drivers/base/dd.c:579 [inline] [<ffffffff82b62d7d>] really_probe+0x12d/0x430 drivers/base/dd.c:658 [<ffffffff82b63141>] __driver_probe_device+0xc1/0x1a0 drivers/base/dd.c:800 [<ffffffff82b6324a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:830 [<ffffffff82b6343b>] __device_attach_driver+0xfb/0x150 drivers/base/dd.c:958 [<ffffffff82b60191>] bus_for_each_drv+0xc1/0x110 drivers/base/bus.c:457 [<ffffffff82b63962>] __device_attach+0x102/0x2a0 drivers/base/dd.c:1030 [<ffffffff82b618fa>] bus_probe_device+0xca/0xd0 drivers/base/bus.c:532 [<ffffffff82b5def3>] device_add+0x993/0xc60 drivers/base/core.c:3625 [<ffffffff831f0a89>] usb_set_configuration+0x9a9/0xc90 drivers/usb/core/message.c:2211 [<ffffffff832033a1>] usb_generic_driver_probe+0xa1/0x100 drivers/usb/core/generic.c:238 [<ffffffff831f3080>] usb_probe_device+0x60/0x140 drivers/usb/core/driver.c:293 BUG: memory leak unreferenced object 0xffff8881051f1a00 (size 512): comm "kworker/0:2", pid 4402, jiffies 4294950769 (age 14.190s) hex dump (first 32 bytes): 00 1a 1f 05 81 88 ff ff 00 1a 1f 05 81 88 ff ff ................ 00 00 00 00 00 00 00 00 bf 03 9b 85 ff ff ff ff ................ backtrace: [<ffffffff81544e14>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057 [<ffffffff82b65308>] kmalloc include/linux/slab.h:559 [inline] [<ffffffff82b65308>] kzalloc include/linux/slab.h:680 [inline] [<ffffffff82b65308>] class_register+0x28/0x140 drivers/base/class.c:186 [<ffffffff82b65467>] class_create+0x47/0x90 drivers/base/class.c:270 [<ffffffff831f7a80>] init_usb_class drivers/usb/core/file.c:91 [inline] [<ffffffff831f7a80>] usb_register_dev+0x290/0x3d0 drivers/usb/core/file.c:179 [<ffffffff832cffc4>] usblp_probe+0x4e4/0x750 drivers/usb/class/usblp.c:1208 [<ffffffff831f39a9>] usb_probe_interface+0x179/0x3c0 drivers/usb/core/driver.c:396 [<ffffffff82b62d7d>] call_driver_probe drivers/base/dd.c:579 [inline] [<ffffffff82b62d7d>] really_probe+0x12d/0x430 drivers/base/dd.c:658 [<ffffffff82b63141>] __driver_probe_device+0xc1/0x1a0 drivers/base/dd.c:800 [<ffffffff82b6324a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:830 [<ffffffff82b6343b>] __device_attach_driver+0xfb/0x150 drivers/base/dd.c:958 [<ffffffff82b60191>] bus_for_each_drv+0xc1/0x110 drivers/base/bus.c:457 [<ffffffff82b63962>] __device_attach+0x102/0x2a0 drivers/base/dd.c:1030 [<ffffffff82b618fa>] bus_probe_device+0xca/0xd0 drivers/base/bus.c:532 [<ffffffff82b5def3>] device_add+0x993/0xc60 drivers/base/core.c:3625 [<ffffffff831f0a89>] usb_set_configuration+0x9a9/0xc90 drivers/usb/core/message.c:2211 [<ffffffff832033a1>] usb_generic_driver_probe+0xa1/0x100 drivers/usb/core/generic.c:238 --- 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
