syzbot has found a reproducer for 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=115abb3ed00000 kernel config: https://syzkaller.appspot.com/x/.config?x=8b976581f6bd1e7d dashboard link: https://syzkaller.appspot.com/bug?extid=a4e309017a5f3a24c7b3 compiler: Debian clang version 11.0.1-2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1488adc6d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c409b2d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a4e309017a5f3a24c7b3@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in number+0x54f/0x2540 lib/vsprintf.c:442 CPU: 0 PID: 1983 Comm: kworker/0:2 Not tainted 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 number+0x54f/0x2540 lib/vsprintf.c:442 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ===================================================== BUG: KMSAN: uninit-value in number+0x8d9/0x2540 lib/vsprintf.c:463 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 number+0x8d9/0x2540 lib/vsprintf.c:463 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ===================================================== BUG: KMSAN: uninit-value in put_dec+0x1dc/0x260 lib/vsprintf.c:258 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 put_dec+0x1dc/0x260 lib/vsprintf.c:258 number+0x896/0x2540 lib/vsprintf.c:476 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ===================================================== BUG: KMSAN: uninit-value in put_dec_trunc8+0x31a/0x3c lib/vsprintf.c:193 Lost 539 message(s)! ===================================================== BUG: KMSAN: uninit-value in number+0x54f/0x2540 lib/vsprintf.c:442 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 number+0x54f/0x2540 lib/vsprintf.c:442 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 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:296 Local variable ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ===================================================== BUG: KMSAN: uninit-value in number+0x8d9/0x2540 lib/vsprintf.c:463 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 number+0x8d9/0x2540 lib/vsprintf.c:463 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 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:296 Local variable ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ===================================================== BUG: KMSAN: uninit-value in put_dec+0x1dc/0x260 lib/vsprintf.c:258 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 put_dec+0x1dc/0x260 lib/vsprintf.c:258 number+0x896/0x2540 lib/vsprintf.c:476 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 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:296 Local variable ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ====================================== Lost 547 message(s)! ===================================================== BUG: KMSAN: uninit-value in number+0x54f/0x2540 lib/vsprintf.c:442 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 number+0x54f/0x2540 lib/vsprintf.c:442 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 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:296 Local variable ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ===================================================== BUG: KMSAN: uninit-value in number+0x8d9/0x2540 lib/vsprintf.c:463 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 number+0x8d9/0x2540 lib/vsprintf.c:463 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 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:296 Local variable ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ===================================================== BUG: KMSAN: uninit-value in put_dec+0x1dc/0x260 lib/vsprintf.c:258 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 put_dec+0x1dc/0x260 lib/vsprintf.c:258 number+0x896/0x2540 lib/vsprintf.c:476 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2126 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2157 sq905_read_data+0x630/0x650 drivers/media/usb/gspca/sq905.c:184 sd_init+0x184/0x530 drivers/media/usb/gspca/sq905.c:329 gspca_dev_probe2+0x129f/0x23f0 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x3db/0x440 drivers/media/usb/gspca/gspca.c:1606 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 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 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:296 Local variable ----act_len@sq905_read_data created at: sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 sq905_read_data+0x87/0x650 drivers/media/usb/gspca/sq905.c:163 ===================================================== ====================================== Lost 547 message(s)! ===================================================== BUG: KMSAN: uninit-value in number+0x54f/0x2540 lib/vsprintf.c:442 CPU: 0 PID: 1983 Comm: kworker/0:2 Tainted: G B 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 number+0x54f/0x2540 lib/vsprintf.c:442 vsnprintf+0x1cd6/0x3600 lib/vsprintf.c:2685 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984
