===================================================== BUG: KMSAN: uninit-value in mac_address_string+0x1040/0x1170 lib/vsprintf.c:1281 CPU: 0 PID: 26873 Comm: kworker/0:4 Not tainted 5.12.0-rc6-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+0x24c/0x2e0 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197 mac_address_string+0x1040/0x1170 lib/vsprintf.c:1281 pointer+0xa87/0x1ea0 lib/vsprintf.c:2267 vsnprintf+0x15f2/0x3600 lib/vsprintf.c:2655 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1990 vprintk_emit+0x28e/0x8b0 kernel/printk/printk.c:2098 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2132 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:401 printk+0x180/0x1cd kernel/printk/printk.c:2163 dvb_usb_adapter_dvb_init+0x818/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:166 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:294 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+0x54/0xa0 mm/kmsan/kmsan_instr.c:147 nova_t_read_mac_address+0x2d4/0x2f0 drivers/media/usb/dvb-usb/nova-t-usb2.c:144 dvb_usb_adapter_dvb_init+0x774/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:165 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:294 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+0x54/0xa0 mm/kmsan/kmsan_instr.c:147 dibusb_read_eeprom_byte+0x53d/0x560 drivers/media/usb/dvb-usb/dibusb-common.c:233 nova_t_read_mac_address+0x1e5/0x2f0 drivers/media/usb/dvb-usb/nova-t-usb2.c:142 dvb_usb_adapter_dvb_init+0x774/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:165 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:294 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104 kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76 slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2931 [inline] kmem_cache_alloc_trace+0x8c7/0x1030 mm/slub.c:2948 kmalloc include/linux/slab.h:554 [inline] dibusb_read_eeprom_byte+0xbb/0x560 drivers/media/usb/dvb-usb/dibusb-common.c:226 nova_t_read_mac_address+0x1e5/0x2f0 drivers/media/usb/dvb-usb/nova-t-usb2.c:142 dvb_usb_adapter_dvb_init+0x774/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:165 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:294 ===================================================== ===================================================== BUG: KMSAN: uninit-value in mac_address_string+0x1061/0x1170 lib/vsprintf.c:1281 CPU: 0 PID: 26873 Comm: kworker/0:4 Tainted: G B 5.12.0-rc6-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+0x24c/0x2e0 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197 mac_address_string+0x1061/0x1170 lib/vsprintf.c:1281 pointer+0xa87/0x1ea0 lib/vsprintf.c:2267 vsnprintf+0x15f2/0x3600 lib/vsprintf.c:2655 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1990 vprintk_emit+0x28e/0x8b0 kernel/printk/printk.c:2098 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2132 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:401 printk+0x180/0x1cd kernel/printk/printk.c:2163 dvb_usb_adapter_dvb_init+0x818/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:166 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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 Lost 1890 message(s)! ===================================================== BUG: KMSAN: uninit-value in mac_address_string+0x1040/0x1170 lib/vsprintf.c:1281 CPU: 0 PID: 26873 Comm: kworker/0:4 Tainted: G B 5.12.0-rc6-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+0x24c/0x2e0 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197 mac_address_string+0x1040/0x1170 lib/vsprintf.c:1281 pointer+0xa87/0x1ea0 lib/vsprintf.c:2267 vsnprintf+0x15f2/0x3600 lib/vsprintf.c:2655 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1990 vprintk_emit+0x28e/0x8b0 kernel/printk/printk.c:2098 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2132 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:401 printk+0x180/0x1cd kernel/printk/printk.c:2163 dvb_usb_adapter_dvb_init+0x818/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:166 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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 process_scheduled_works kernel/workqueue.c:2337 [inline] worker_thread+0x12bc/0x2340 kernel/workqueue.c:2423 kthread+0x521/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 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+0x54/0xa0 mm/kmsan/kmsan_instr.c:147 nova_t_read_mac_address+0x2d4/0x2f0 drivers/media/usb/dvb-usb/nova-t-usb2.c:144 dvb_usb_adapter_dvb_init+0x774/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:165 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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 process_scheduled_works kernel/workqueue.c:2337 [inline] worker_thread+0x12bc/0x2340 kernel/workqueue.c:2423 kthread+0x521/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 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+0x54/0xa0 mm/kmsan/kmsan_instr.c:147 dibusb_read_eeprom_byte+0x53d/0x560 drivers/media/usb/dvb-usb/dibusb-common.c:233 nova_t_read_mac_address+0x1e5/0x2f0 drivers/media/usb/dvb-usb/nova-t-usb2.c:142 dvb_usb_adapter_dvb_init+0x774/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:165 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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 process_scheduled_works kernel/workqueue.c:2337 [inline] worker_thread+0x12bc/0x2340 kernel/workqueue.c:2423 kthread+0x521/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104 kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76 slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2931 [inline] kmem_cache_alloc_trace+0x8c7/0x1030 mm/slub.c:2948 kmalloc include/linux/slab.h:554 [inline] dibusb_read_eeprom_byte+0xbb/0x560 drivers/media/usb/dvb-usb/dibusb-common.c:226 nova_t_read_mac_address+0x1e5/0x2f0 drivers/media/usb/dvb-usb/nova-t-usb2.c:142 dvb_usb_adapter_dvb_init+0x774/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:165 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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 process_scheduled_works kernel/workqueue.c:2337 [inline] worker_thread+0x12bc/0x2340 kernel/workqueue.c:2423 kthread+0x521/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 ===================================================== ===================================================== BUG: KMSAN: uninit-value in mac_address_string+0x1061/0x1170 lib/vsprintf.c:1281 CPU: 0 PID: 26873 Comm: kworker/0:4 Tainted: G B 5.12.0-rc6-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+0x24c/0x2e0 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197 mac_address_string+0x1061/0x1170 lib/vsprintf.c:1281 pointer+0xa87/0x1ea0 lib/vsprintf.c:2267 vsnprintf+0x15f2/0x3600 lib/vsprintf.c:2655 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1990 vprintk_emit+0x28e/0x8b0 kernel/printk/printk.c:2098 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2132 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:401 printk+0x180/0x1cd kernel/printk/printk.c:2163 dvb_usb_adapter_dvb_init+0x818/0x1300 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:166 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x2817/0x3370 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 nova_t_probe+0x73/0x80 drivers/media/usb/dvb-usb/nova-t-usb2.c:156 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xe15/0x24d0 drivers/base/dd.c:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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:561 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431 __device_attach+0x56a/0x890 drivers/base/dd.c:917 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491 device_add+0x2c15/0x31d0 drivers/base/core.c:3242 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 Lost 1902 message(s)!