sd 1:0:0:0: [sdb] 0 512-byte logical blocks: (0 B/0 B)
sd 1:0:0:0: [sdb] 0-byte physical blocks
=====================================================
BUG: KMSAN: uninit-value in scsi_mode_sense+0x1064/0x1710 drivers/scsi/scsi_lib.c:2142
CPU: 0 PID: 8854 Comm: kworker/u4:3 Not tainted 5.10.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound async_run_entry_fn
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 scsi_mode_sense+0x1064/0x1710 drivers/scsi/scsi_lib.c:2142
 sd_read_write_protect_flag drivers/scsi/sd.c:2635 [inline]
 sd_revalidate_disk+0x51ed/0xdb90 drivers/scsi/sd.c:3225
 sd_probe+0xfad/0x1790 drivers/scsi/sd.c:3460
 really_probe+0xebd/0x2420 drivers/base/dd.c:558
 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:738
 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:844
 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
 __device_attach_async_helper+0x311/0x3e0 drivers/base/dd.c:870
 async_run_entry_fn+0x1a2/0x7c0 kernel/async.c:123
 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2272
 worker_thread+0x123c/0x2730 kernel/workqueue.c:2418
 kthread+0x51c/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
 kmsan_memcpy_memmove_metadata+0x25e/0x2d0 mm/kmsan/kmsan.c:226
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:246
 __msan_memcpy+0x46/0x60 mm/kmsan/kmsan_instr.c:110
 bio_copy_kern_endio_read+0x484/0x5e0 block/blk-map.c:445
 bio_endio+0x838/0x9c0 block/bio.c:1452
 req_bio_endio block/blk-core.c:263 [inline]
 blk_update_request+0xf3f/0x26c0 block/blk-core.c:1467
 scsi_end_request+0x117/0xe20 drivers/scsi/scsi_lib.c:569
 scsi_io_completion+0x351/0x3180 drivers/scsi/scsi_lib.c:965
 scsi_finish_command+0x82e/0x850 drivers/scsi/scsi.c:214
 scsi_softirq_done+0x24d/0xb00 drivers/scsi/scsi_lib.c:1443
 blk_done_softirq+0x2e9/0x4e0 block/blk-mq.c:586
 __do_softirq+0x1a9/0x6fa kernel/softirq.c:298

Uninit was created at:
 kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:121
 kmsan_alloc_page+0xd3/0x1f0 mm/kmsan/kmsan_shadow.c:274
 __alloc_pages_nodemask+0x827/0xf90 mm/page_alloc.c:4989
 alloc_pages_current+0x7b6/0xb60 mm/mempolicy.c:2271
 alloc_pages include/linux/gfp.h:547 [inline]
 bio_copy_kern block/blk-map.c:491 [inline]
 blk_rq_map_kern+0xd97/0x1500 block/blk-map.c:698
 __scsi_execute+0x325/0xc10 drivers/scsi/scsi_lib.c:257
 scsi_execute_req include/scsi/scsi_device.h:461 [inline]
 scsi_mode_sense+0x652/0x1710 drivers/scsi/scsi_lib.c:2119
 sd_read_write_protect_flag drivers/scsi/sd.c:2635 [inline]
 sd_revalidate_disk+0x51ed/0xdb90 drivers/scsi/sd.c:3225
 sd_probe+0xfad/0x1790 drivers/scsi/sd.c:3460
 really_probe+0xebd/0x2420 drivers/base/dd.c:558
 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:738
 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:844
 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
 __device_attach_async_helper+0x311/0x3e0 drivers/base/dd.c:870
 async_run_entry_fn+0x1a2/0x7c0 kernel/async.c:123
 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2272
 worker_thread+0x123c/0x2730 kernel/workqueue.c:2418
 kthread+0x51c/0x560 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
=====================================================