===================================================== BUG: KMSAN: uninit-value in hex_string+0x917/0xa20 lib/vsprintf.c:1145 CPU: 0 PID: 32246 Comm: systemd-udevd Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 hex_string+0x917/0xa20 lib/vsprintf.c:1145 pointer+0x1012/0x1c30 lib/vsprintf.c:2231 vsnprintf+0x1b35/0x35c0 lib/vsprintf.c:2624 vscnprintf lib/vsprintf.c:2723 [inline] scnprintf+0x238/0x350 lib/vsprintf.c:2777 sysfs_format_mac+0xde/0x100 net/ethernet/eth.c:405 address_show+0x175/0x200 net/core/net-sysfs.c:150 dev_attr_show+0xdb/0x210 drivers/base/core.c:1426 sysfs_kf_seq_show+0x4df/0x8e0 fs/sysfs/file.c:60 kernfs_seq_show+0x15f/0x1e0 fs/kernfs/file.c:167 seq_read+0xb47/0x20a0 fs/seq_file.c:208 kernfs_fop_read+0x2fd/0xa90 fs/kernfs/file.c:251 vfs_read+0x577/0x14d0 fs/read_write.c:479 ksys_read+0x275/0x500 fs/read_write.c:607 __do_sys_read fs/read_write.c:617 [inline] __se_sys_read+0x92/0xb0 fs/read_write.c:615 __x64_sys_read+0x4a/0x70 fs/read_write.c:615 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fa7d3dc6910 Code: Bad RIP value. RSP: 002b:00007fffbded68d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000056423f24c550 RCX: 00007fa7d3dc6910 RDX: 0000000000001000 RSI: 000056423f259f50 RDI: 0000000000000007 RBP: 00007fa7d4081440 R08: 00007fa7d4085288 R09: 0000000000001010 R10: 000056423f24c550 R11: 0000000000000246 R12: 0000000000001000 R13: 0000000000000d68 R14: 000056423f259f50 R15: 00007fa7d4080900 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116 set_ethernet_addr drivers/net/usb/rtl8150.c:282 [inline] rtl8150_probe+0x1236/0x15b0 drivers/net/usb/rtl8150.c:912 usb_probe_interface+0xece/0x1550 drivers/usb/core/driver.c:374 really_probe+0xf20/0x20b0 drivers/base/dd.c:529 driver_probe_device+0x293/0x390 drivers/base/dd.c:701 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:807 bus_for_each_drv+0x2ca/0x3f0 drivers/base/bus.c:431 __device_attach+0x4e2/0x7f0 drivers/base/dd.c:873 device_initial_probe+0x4a/0x60 drivers/base/dd.c:920 bus_probe_device+0x177/0x3d0 drivers/base/bus.c:491 device_add+0x3b0e/0x40d0 drivers/base/core.c:2680 usb_set_configuration+0x380f/0x3f10 drivers/usb/core/message.c:2032 usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:241 usb_probe_device+0x311/0x490 drivers/usb/core/driver.c:272 really_probe+0xf20/0x20b0 drivers/base/dd.c:529 driver_probe_device+0x293/0x390 drivers/base/dd.c:701 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:807 bus_for_each_drv+0x2ca/0x3f0 drivers/base/bus.c:431 __device_attach+0x4e2/0x7f0 drivers/base/dd.c:873 device_initial_probe+0x4a/0x60 drivers/base/dd.c:920 bus_probe_device+0x177/0x3d0 drivers/base/bus.c:491 device_add+0x3b0e/0x40d0 drivers/base/core.c:2680 usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5208 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x5e7b/0x8a70 drivers/usb/core/hub.c:5576 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269 worker_thread+0x10bc/0x2730 kernel/workqueue.c:2415 kthread+0x551/0x590 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Local variable ----node_id.i@rtl8150_probe created at: get_registers drivers/net/usb/rtl8150.c:911 [inline] set_ethernet_addr drivers/net/usb/rtl8150.c:281 [inline] rtl8150_probe+0xea7/0x15b0 drivers/net/usb/rtl8150.c:912 get_registers drivers/net/usb/rtl8150.c:911 [inline] set_ethernet_addr drivers/net/usb/rtl8150.c:281 [inline] rtl8150_probe+0xea7/0x15b0 drivers/net/usb/rtl8150.c:912 =====================================================