=====================================================
BUG: KMSAN: uninit-value in hex_string+0x917/0xa20 lib/vsprintf.c:1145
CPU: 1 PID: 10767 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: 0033:0x7fa626fc5910
Code: Bad RIP value.
RSP: 002b:00007ffc3e17c128 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000564a2e1fe340 RCX: 00007fa626fc5910
RDX: 0000000000001000 RSI: 0000564a2e2140f0 RDI: 000000000000000f
RBP: 00007fa627280440 R08: 00007fa627284278 R09: 0000000000001010
R10: 0000564a2e1fe340 R11: 0000000000000246 R12: 0000000000001000
R13: 0000000000000d68 R14: 0000564a2e2140f0 R15: 00007fa62727f900

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
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x128c/0x2730 kernel/workqueue.c:2417
 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
=====================================================