Date:   Mon, 25 Nov 2019 11:13:41 +0100
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     syzbot <syzbot+1234691fec1b8ceba8b1@...kaller.appspotmail.com>
Cc:     glider@...gle.com, Jiri Kosina <jikos@...nel.org>,
        "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        syzkaller-bugs@...glegroups.com
Subject: Re: KMSAN: uninit-value in lg4ff_set_autocenter_default

Pretty sure this is already fixed

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git for-next


On Mon, Oct 28, 2019 at 11:32 AM syzbot
<syzbot+1234691fec1b8ceba8b1@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    d86c1556 kmsan: add printk_test()
> git tree:       https://github.com/google/kmsan.git master
> console output: https://syzkaller.appspot.com/x/log.txt?x=125e96e0e00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=c07a3d4f8a59e198
> dashboard link: https://syzkaller.appspot.com/bug?extid=1234691fec1b8ceba8b1
> compiler:       clang version 9.0.0 (/home/glider/llvm/clang
> 80fee25776c2fb61e74c1ecb1a523375c2500b69)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=179da024e00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=157f40a8e00000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+1234691fec1b8ceba8b1@...kaller.appspotmail.com
>
> logitech 0003:046D:CA03.0001: hidraw0: USB HID v0.00 Device [HID 046d:ca03]
> on usb-dummy_hcd.3-1/input0
> =====================================================
> BUG: KMSAN: uninit-value in dev_get_drvdata include/linux/device.h:1388
> [inline]
> BUG: KMSAN: uninit-value in hid_get_drvdata include/linux/hid.h:628 [inline]
> BUG: KMSAN: uninit-value in lg4ff_set_autocenter_default+0x23a/0xa20
> drivers/hid/hid-lg4ff.c:477
> CPU: 1 PID: 49 Comm: kworker/1:1 Not tainted 5.4.0-rc3+ #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: usb_hub_wq hub_event
> Call Trace:
>   __dump_stack lib/dump_stack.c:77 [inline]
>   dump_stack+0x191/0x1f0 lib/dump_stack.c:113
>   kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108
>   __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245
>   dev_get_drvdata include/linux/device.h:1388 [inline]
>   hid_get_drvdata include/linux/hid.h:628 [inline]
>   lg4ff_set_autocenter_default+0x23a/0xa20 drivers/hid/hid-lg4ff.c:477
>   lg4ff_init+0x1e3d/0x33a0 drivers/hid/hid-lg4ff.c:1355
>   lg_probe+0x103d/0x1110 drivers/hid/hid-lg.c:850
>   hid_device_probe+0x490/0x820 drivers/hid/hid-core.c:2209
>   really_probe+0xcc2/0x1f90 drivers/base/dd.c:548
>   driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
>   __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
>   bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
>   __device_attach+0x489/0x750 drivers/base/dd.c:894
>   device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
>   bus_probe_device+0x131/0x390 drivers/base/bus.c:490
>   device_add+0x25b5/0x2df0 drivers/base/core.c:2201
>   hid_add_device+0x12f1/0x1440 drivers/hid/hid-core.c:2365
>   usbhid_probe+0x152b/0x1880 drivers/hid/usbhid/hid-core.c:1386
>   usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
>   really_probe+0xd91/0x1f90 drivers/base/dd.c:552
>   driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
>   __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
>   bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
>   __device_attach+0x489/0x750 drivers/base/dd.c:894
>   device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
>   bus_probe_device+0x131/0x390 drivers/base/bus.c:490
>   device_add+0x25b5/0x2df0 drivers/base/core.c:2201
>   usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027
>   generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210
>   usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266
>   really_probe+0xd91/0x1f90 drivers/base/dd.c:552
>   driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
>   __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
>   bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
>   __device_attach+0x489/0x750 drivers/base/dd.c:894
>   device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
>   bus_probe_device+0x131/0x390 drivers/base/bus.c:490
>   device_add+0x25b5/0x2df0 drivers/base/core.c:2201
>   usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2536
>   hub_port_connect drivers/usb/core/hub.c:5098 [inline]
>   hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
>   port_event drivers/usb/core/hub.c:5359 [inline]
>   hub_event+0x581d/0x72f0 drivers/usb/core/hub.c:5441
>   process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269
>   process_scheduled_works kernel/workqueue.c:2331 [inline]
>   worker_thread+0x189c/0x2460 kernel/workqueue.c:2417
>   kthread+0x4b5/0x4f0 kernel/kthread.c:256
>   ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
>
> Uninit was created at:
>   kmsan_save_stack_with_flags+0x3f/0x90 mm/kmsan/kmsan.c:151
>   kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:362 [inline]
>   kmsan_alloc_page+0x153/0x360 mm/kmsan/kmsan_shadow.c:391
>   __alloc_pages_nodemask+0x149d/0x60c0 mm/page_alloc.c:4794
>   alloc_pages_current+0x68d/0x9a0 mm/mempolicy.c:2188
>   alloc_pages include/linux/gfp.h:511 [inline]
>   alloc_slab_page+0x10e/0x12c0 mm/slub.c:1536
>   allocate_slab mm/slub.c:1681 [inline]
>   new_slab+0x2ca/0x1990 mm/slub.c:1747
>   new_slab_objects mm/slub.c:2498 [inline]
>   ___slab_alloc+0x1423/0x1fb0 mm/slub.c:2649
>   __slab_alloc mm/slub.c:2689 [inline]
>   slab_alloc_node mm/slub.c:2752 [inline]
>   slab_alloc mm/slub.c:2801 [inline]
>   __kmalloc+0x356/0x430 mm/slub.c:3832
>   kmalloc include/linux/slab.h:561 [inline]
>   kzalloc+0x53/0xb0 include/linux/slab.h:690
>   crypto_create_tfm+0xfd/0x640 crypto/api.c:459
>   crypto_alloc_tfm+0x339/0x630 crypto/api.c:538
>   crypto_alloc_shash+0x99/0xb0 crypto/shash.c:450
>   ima_alloc_tfm security/integrity/ima/ima_crypto.c:87 [inline]
>   ima_calc_field_array_hash+0x20c/0xbb0
> security/integrity/ima/ima_crypto.c:519
>   ima_store_template security/integrity/ima/ima_api.c:109 [inline]
>   ima_store_measurement+0x4d6/0xd00 security/integrity/ima/ima_api.c:328
>   process_measurement+0x1f4e/0x2bd0 security/integrity/ima/ima_main.c:334
>   ima_bprm_check+0x13d/0x300 security/integrity/ima/ima_main.c:413
>   security_bprm_check+0x192/0x1e0 security/security.c:787
>   search_binary_handler+0xb2/0xac0 fs/exec.c:1646
>   exec_binprm fs/exec.c:1702 [inline]
>   __do_execve_file+0x2218/0x2e90 fs/exec.c:1822
>   do_execveat_common fs/exec.c:1868 [inline]
>   do_execve fs/exec.c:1885 [inline]
>   __do_sys_execve fs/exec.c:1961 [inline]
>   __se_sys_execve+0xec/0x110 fs/exec.c:1956
>   __x64_sys_execve+0x4a/0x70 fs/exec.c:1956
>   do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
>   entry_SYSCALL_64_after_hwframe+0x63/0xe7
> =====================================================
>
>
> ---
> This bug 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@...glegroups.com.
>
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> syzbot can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches

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