[syzbot] KMSAN: uninit-value in efuse_one_byte_read

From: syzbot
Date: Mon Mar 29 2021 - 15:45:07 EST

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Hello,

syzbot found the following issue on:

HEAD commit: 29ad81a1 arch/x86: add missing include to sparsemem.h
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=12d4e126d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=b573c14b733efb1c
dashboard link: https://syzkaller.appspot.com/bug?extid=6610740013f861b6e829
compiler: Debian clang version 11.0.1-2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6610740013f861b6e829@xxxxxxxxxxxxxxxxxxxxxxxxx

r8712u: register rtl8712_netdev_ops to netdev_ops
usb 2-1: r8712u: USB_SPEED_HIGH with 0 endpoints
usb 2-1: r8712u: Boot from EEPROM: Autoload OK
=====================================================
BUG: KMSAN: uninit-value in efuse_one_byte_read+0x206/0x2e0 drivers/staging/rtl8712/rtl8712_efuse.c:76
CPU: 1 PID: 4662 Comm: kworker/1:3 Tainted: G W 5.11.0-rc7-syzkaller #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:79 [inline]
dump_stack+0x21c/0x280 lib/dump_stack.c:120
kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
efuse_one_byte_read+0x206/0x2e0 drivers/staging/rtl8712/rtl8712_efuse.c:76
r8712_efuse_pg_packet_read+0x29c/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:245
r871xu_drv_init+0x1cfb/0x2fe0 drivers/staging/rtl8712/usb_intf.c:443
usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_set_configuration+0x3872/0x3eb0 drivers/usb/core/message.c:2164
usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2555
hub_port_connect drivers/usb/core/hub.c:5223 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
port_event drivers/usb/core/hub.c:5509 [inline]
hub_event+0x5b99/0x8870 drivers/usb/core/hub.c:5591
process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
kthread+0x521/0x560 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Local variable ----data@usb_read8 created at:
usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
=====================================================
=====================================================
BUG: KMSAN: uninit-value in r8712_efuse_pg_packet_read+0x77c/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:246
CPU: 1 PID: 4662 Comm: kworker/1:3 Tainted: G B W 5.11.0-rc7-syzkaller #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:79 [inline]
dump_stack+0x21c/0x280 lib/dump_stack.c:120
kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
r8712_efuse_pg_packet_read+0x77c/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:246
r871xu_drv_init+0x1cfb/0x2fe0 drivers/staging/rtl8712/usb_intf.c:443
usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_set_configuration+0x3872/0x3eb0 drivers/usb/core/message.c:2164
usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2555
hub_port_connect drivers/usb/core/hub.c:5223 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
port_event drivers/usb/core/hub.c:5509 [inline]
hub_event+0x5b99/0x8870 drivers/usb/core/hub.c:5591
process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
kthread+0x521/0x560 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Uninit was stored to memory at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
__msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
efuse_one_byte_read+0x2cd/0x2e0 drivers/staging/rtl8712/rtl8712_efuse.c:86
r8712_efuse_pg_packet_read+0x29c/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:245
r871xu_drv_init+0x1cfb/0x2fe0 drivers/staging/rtl8712/usb_intf.c:443
usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_set_configuration+0x3872/0x3eb0 drivers/usb/core/message.c:2164
usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2555
hub_port_connect drivers/usb/core/hub.c:5223 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
port_event drivers/usb/core/hub.c:5509 [inline]
hub_event+0x5b99/0x8870 drivers/usb/core/hub.c:5591
process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
kthread+0x521/0x560 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Local variable ----data@usb_read8 created at:
usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
=====================================================
=====================================================
BUG: KMSAN: uninit-value in r8712_efuse_pg_packet_read+0x79b/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:251
CPU: 1 PID: 4662 Comm: kworker/1:3 Tainted: G B W 5.11.0-rc7-syzkaller #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:79 [inline]
dump_stack+0x21c/0x280 lib/dump_stack.c:120
kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
r8712_efuse_pg_packet_read+0x79b/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:251
r871xu_drv_init+0x1cfb/0x2fe0 drivers/staging/rtl8712/usb_intf.c:443
usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_set_configuration+0x3872/0x3eb0 drivers/usb/core/message.c:2164
usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2555
hub_port_connect drivers/usb/core/hub.c:5223 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
port_event drivers/usb/core/hub.c:5509 [inline]
hub_event+0x5b99/0x8870 drivers/usb/core/hub.c:5591
process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
kthread+0x521/0x560 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Uninit was stored to memory at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
__msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
efuse_one_byte_read+0x2cd/0x2e0 drivers/staging/rtl8712/rtl8712_efuse.c:86
r8712_efuse_pg_packet_read+0x29c/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:245
r871xu_drv_init+0x1cfb/0x2fe0 drivers/staging/rtl8712/usb_intf.c:443
usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_set_configuration+0x3872/0x3eb0 drivers/usb/core/message.c:2164
usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2555
hub_port_connect drivers/usb/core/hub.c:5223 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
port_event drivers/usb/core/hub.c:5509 [inline]
hub_event+0x5b99/0x8870 drivers/usb/core/hub.c:5591
process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
kthread+0x521/0x560 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Local variable ----data@usb_read8 created at:
usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
=====================================================
=====================================================
BUG: KMSAN: uninit-value in r8712_efuse_pg_packet_read+0xb56/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:244
CPU: 1 PID: 4662 Comm: kworker/1:3 Tainted: G B W 5.11.0-rc7-syzkaller #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:79 [inline]
dump_stack+0x21c/0x280 lib/dump_stack.c:120
kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
r8712_efuse_pg_packet_read+0xb56/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:244
r871xu_drv_init+0x1cfb/0x2fe0 drivers/staging/rtl8712/usb_intf.c:443
usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_set_configuration+0x3872/0x3eb0 drivers/usb/core/message.c:2164
usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2555
hub_port_connect drivers/usb/core/hub.c:5223 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
port_event drivers/usb/core/hub.c:5509 [inline]
hub_event+0x5b99/0x8870 drivers/usb/core/hub.c:5591
process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
kthread+0x521/0x560 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Uninit was stored to memory at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
__msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
efuse_one_byte_read+0x2cd/0x2e0 drivers/staging/rtl8712/rtl8712_efuse.c:86
r8712_efuse_pg_packet_read+0x29c/0xcd0 drivers/staging/rtl8712/rtl8712_efuse.c:245
r871xu_drv_init+0x1cfb/0x2fe0 drivers/staging/rtl8712/usb_intf.c:443
usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_set_configuration+0x3872/0x3eb0 drivers/usb/core/message.c:2164
usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293
really_probe+0xe15/0x24d0 drivers/base/dd.c:558
driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
__device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
__device_attach+0x56a/0x890 drivers/base/dd.c:914
device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
device_add+0x2c15/0x31d0 drivers/base/core.c:3109
usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2555
hub_port_connect drivers/usb/core/hub.c:5223 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
port_event drivers/usb/core/hub.c:5509 [inline]
hub_event+0x5b99/0x8870 drivers/usb/core/hub.c:5591
process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
kthread+0x521/0x560 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Local variable ----data@usb_read8 created at:
usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
=====================================================

---
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