Messages in this thread | | | Date | Thu, 06 Jun 2019 02:42:04 -0700 | Subject | KMSAN: uninit-value in rt2500usb_bbp_read | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: f75e4cfe kmsan: use kmsan_handle_urb() in urb.c git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=12f8b01ea00000 kernel config: https://syzkaller.appspot.com/x/.config?x=602468164ccdc30a dashboard link: https://syzkaller.appspot.com/bug?extid=a106a5b084a6890d2607 compiler: clang version 9.0.0 (/home/glider/llvm/clang 06d00afa61eef8f7f501ebdb4e8612ea43ec2d78) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14f746f2a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=153072d2a00000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+a106a5b084a6890d2607@syzkaller.appspotmail.com
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? usb 1-1: reset high-speed USB device number 2 using dummy_hcd usb 1-1: device descriptor read/64, error -71 ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x09 failed for offset 0x0000 with error -71 ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x04d0 with error -71 ================================================================== BUG: KMSAN: uninit-value in rt2500usb_regbusy_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:116 [inline] BUG: KMSAN: uninit-value in rt2500usb_bbp_read+0x174/0x640 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:172 CPU: 1 PID: 4943 Comm: kworker/1:2 Not tainted 5.1.0+ #1 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+0x130/0x2a0 mm/kmsan/kmsan.c:622 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:310 rt2500usb_regbusy_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:116 [inline] rt2500usb_bbp_read+0x174/0x640 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:172 rt2500usb_validate_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1387 [inline] rt2500usb_probe_hw+0x3b1/0x2230 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1764 rt2x00lib_probe_dev+0xb81/0x3090 drivers/net/wireless/ralink/rt2x00/rt2x00dev.c:1427 rt2x00usb_probe+0x7c7/0xf70 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c:837 rt2500usb_probe+0x50/0x60 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1977 usb_probe_interface+0xd66/0x1320 drivers/usb/core/driver.c:361 really_probe+0xdae/0x1d80 drivers/base/dd.c:513 driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x454/0x730 drivers/base/dd.c:844 device_initial_probe+0x4a/0x60 drivers/base/dd.c:891 bus_probe_device+0x137/0x390 drivers/base/bus.c:514 device_add+0x288d/0x30e0 drivers/base/core.c:2106 usb_set_configuration+0x30dc/0x3750 drivers/usb/core/message.c:2027 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210 usb_probe_device+0x14c/0x200 drivers/usb/core/driver.c:266 really_probe+0xdae/0x1d80 drivers/base/dd.c:513 driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x454/0x730 drivers/base/dd.c:844 device_initial_probe+0x4a/0x60 drivers/base/dd.c:891 bus_probe_device+0x137/0x390 drivers/base/bus.c:514 device_add+0x288d/0x30e0 drivers/base/core.c:2106 usb_new_device+0x23e5/0x2ff0 drivers/usb/core/hub.c:2534 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x48d1/0x7290 drivers/usb/core/hub.c:5432 process_one_work+0x1572/0x1f00 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:254 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
Local variable description: ----reg.i.i@rt2500usb_bbp_read Variable was created at: rt2500usb_register_read_lock drivers/net/wireless/ralink/rt2x00/rt2500usb.c:72 [inline] rt2500usb_regbusy_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:115 [inline] rt2500usb_bbp_read+0xa4/0x640 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:172 rt2500usb_validate_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1387 [inline] rt2500usb_probe_hw+0x3b1/0x2230 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1764 ==================================================================
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