syzbot has found a reproducer for the following issue on: HEAD commit: 33d9269ef6e0 Revert "kernel: kmsan: don't instrument stack.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=158ddbcf700000 kernel config: https://syzkaller.appspot.com/x/.config?x=d830111cc3be873 dashboard link: https://syzkaller.appspot.com/bug?extid=d3dbdf31fbe9d8f5f311 compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=146e3dc3700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d3dbdf31fbe9d8f5f311@xxxxxxxxxxxxxxxxxxxxxxxxx ax88179_178a 2-1:0.252 (unnamed net_device) (uninitialized): Failed to read reg index 0x0001: -71 ax88179_178a 2-1:0.252 (unnamed net_device) (uninitialized): Failed to read reg index 0x0002: -71 ===================================================== BUG: KMSAN: uninit-value in ax88179_check_eeprom drivers/net/usb/ax88179_178a.c:1074 [inline] BUG: KMSAN: uninit-value in ax88179_led_setting+0x884/0x30b0 drivers/net/usb/ax88179_178a.c:1168 ax88179_check_eeprom drivers/net/usb/ax88179_178a.c:1074 [inline] ax88179_led_setting+0x884/0x30b0 drivers/net/usb/ax88179_178a.c:1168 ax88179_bind+0xf00/0x1a50 drivers/net/usb/ax88179_178a.c:1412 usbnet_probe+0x1251/0x4160 drivers/net/usb/usbnet.c:1747 usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 really_probe+0x653/0x14b0 drivers/base/dd.c:596 __driver_probe_device+0x3e9/0x530 drivers/base/dd.c:755 driver_probe_device drivers/base/dd.c:785 [inline] __device_attach_driver+0x79f/0x1120 drivers/base/dd.c:902 bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 __device_attach+0x593/0x8e0 drivers/base/dd.c:973 device_initial_probe+0x4a/0x60 drivers/base/dd.c:1020 bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 device_add+0x1fff/0x26e0 drivers/base/core.c:3405 usb_set_configuration+0x37e9/0x3ed0 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x13c/0x300 drivers/usb/core/generic.c:238 usb_probe_device+0x309/0x570 drivers/usb/core/driver.c:293 really_probe+0x653/0x14b0 drivers/base/dd.c:596 __driver_probe_device+0x3e9/0x530 drivers/base/dd.c:755 driver_probe_device drivers/base/dd.c:785 [inline] __device_attach_driver+0x79f/0x1120 drivers/base/dd.c:902 bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 __device_attach+0x593/0x8e0 drivers/base/dd.c:973 device_initial_probe+0x4a/0x60 drivers/base/dd.c:1020 bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 device_add+0x1fff/0x26e0 drivers/base/core.c:3405 usb_new_device+0x1b8e/0x2950 drivers/usb/core/hub.c:2566 hub_port_connect drivers/usb/core/hub.c:5358 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5660 [inline] hub_event+0x58e3/0x89e0 drivers/usb/core/hub.c:5742 process_one_work+0xdb6/0x1820 kernel/workqueue.c:2307 worker_thread+0x10b3/0x21e0 kernel/workqueue.c:2454 kthread+0x3c7/0x500 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Local variable eeprom.i created at: ax88179_check_eeprom drivers/net/usb/ax88179_178a.c:1045 [inline] ax88179_led_setting+0x2e2/0x30b0 drivers/net/usb/ax88179_178a.c:1168 ax88179_bind+0xf00/0x1a50 drivers/net/usb/ax88179_178a.c:1412 CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.17.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event =====================================================
