Hello, syzbot found the following issue on: HEAD commit: 8155b4ef3466 Add linux-next specific files for 20241220 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=111cafe8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9c90bb7161a56c88 dashboard link: https://syzkaller.appspot.com/bug?extid=dd5f8d6456680e55eb0a compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12ea52df980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111600c4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/98a974fc662d/disk-8155b4ef.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2dea9b72f624/vmlinux-8155b4ef.xz kernel image: https://storage.googleapis.com/syzbot-assets/593a42b9eb34/bzImage-8155b4ef.xz The issue was bisected to: commit 5203b3a18c1bbf50ec5fff27489da8e9bce48ddb Author: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Date: Thu Nov 7 07:15:29 2024 +0000 Input: ff-core - make use of __free() cleanup facility bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14ffd2df980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=16ffd2df980000 console output: https://syzkaller.appspot.com/x/log.txt?x=12ffd2df980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+dd5f8d6456680e55eb0a@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 5203b3a18c1b ("Input: ff-core - make use of __free() cleanup facility") usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: Product: syz usb 1-1: Manufacturer: syz usb 1-1: SerialNumber: syz usb 1-1: config 0 descriptor?? ================================================================== BUG: KASAN: null-ptr-deref in instrument_write include/linux/instrumented.h:40 [inline] BUG: KASAN: null-ptr-deref in ___set_bit include/asm-generic/bitops/instrumented-non-atomic.h:28 [inline] BUG: KASAN: null-ptr-deref in input_ff_create+0x1aa/0x2f0 drivers/input/ff-core.c:325 Write of size 8 at addr 0000000000000040 by task kworker/0:2/975 CPU: 0 UID: 0 PID: 975 Comm: kworker/0:2 Not tainted 6.13.0-rc3-next-20241220-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_report+0xe8/0x550 mm/kasan/report.c:492 kasan_report+0x143/0x180 mm/kasan/report.c:602 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_write include/linux/instrumented.h:40 [inline] ___set_bit include/asm-generic/bitops/instrumented-non-atomic.h:28 [inline] input_ff_create+0x1aa/0x2f0 drivers/input/ff-core.c:325 input_ff_create_memless+0x133/0x630 drivers/input/ff-memless.c:522 xpad_init_ff drivers/input/joystick/xpad.c:1562 [inline] xpad_init_input+0xcef/0x1440 drivers/input/joystick/xpad.c:1960 xpad_probe+0x1427/0x1b90 drivers/input/joystick/xpad.c:2143 usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396 really_probe+0x2b9/0xad0 drivers/base/dd.c:658 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800 driver_probe_device+0x50/0x430 drivers/base/dd.c:830 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:459 __device_attach+0x333/0x520 drivers/base/dd.c:1030 bus_probe_device+0x189/0x260 drivers/base/bus.c:534 device_add+0x856/0xbf0 drivers/base/core.c:3665 usb_set_configuration+0x1976/0x1fb0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x88/0x140 drivers/usb/core/generic.c:254 usb_probe_device+0x1b8/0x380 drivers/usb/core/driver.c:291 really_probe+0x2b9/0xad0 drivers/base/dd.c:658 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800 driver_probe_device+0x50/0x430 drivers/base/dd.c:830 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:459 __device_attach+0x333/0x520 drivers/base/dd.c:1030 bus_probe_device+0x189/0x260 drivers/base/bus.c:534 device_add+0x856/0xbf0 drivers/base/core.c:3665 usb_new_device+0x104a/0x19a0 drivers/usb/core/hub.c:2651 hub_port_connect drivers/usb/core/hub.c:5521 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x2d6d/0x5150 drivers/usb/core/hub.c:5903 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> ================================================================== --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, 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 overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
