=====================================================
BUG: KMSAN: uninit-value in number+0x851/0x23d0 lib/vsprintf.c:490
 number+0x851/0x23d0 lib/vsprintf.c:490
 vsnprintf+0x1f0d/0x3650 lib/vsprintf.c:2861
 vprintk_store+0x537/0x2150 kernel/printk/printk.c:2135
 vprintk_emit+0x25c/0x950 kernel/printk/printk.c:2229
 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2256
 vprintk+0x15f/0x180 kernel/printk/printk_safe.c:50
 _printk+0x18d/0x1cf kernel/printk/printk.c:2266
 blk_print_req_error+0x45f/0x4d0 block/blk-mq.c:701
 blk_update_request+0x1564/0x1d90 block/blk-mq.c:793
 blk_mq_end_request block/blk-mq.c:928 [inline]
 blk_mq_plug_issue_direct+0x50f/0x1110 block/blk-mq.c:2538
 blk_mq_flush_plug_list+0x883/0x1500 block/blk-mq.c:2596
 blk_flush_plug+0x775/0x820 block/blk-core.c:1282
 blk_finish_plug+0xad/0xe0 block/blk-core.c:1306
 read_pages+0xb54/0x16f0 mm/readahead.c:149
 page_cache_ra_unbounded+0xcb5/0xd50 mm/readahead.c:238
 do_page_cache_ra mm/readahead.c:268 [inline]
 force_page_cache_ra+0x635/0x7a0 mm/readahead.c:300
 page_cache_sync_ra+0x4aa/0x510 mm/readahead.c:574
 page_cache_sync_readahead include/linux/pagemap.h:1056 [inline]
 filemap_get_pages mm/filemap.c:2589 [inline]
 filemap_read+0xb52/0x41c0 mm/filemap.c:2676
 blkdev_read_iter+0xa76/0xd30 block/fops.c:614
 call_read_iter include/linux/fs.h:2068 [inline]
 new_sync_read fs/read_write.c:400 [inline]
 vfs_read+0x1631/0x1980 fs/read_write.c:481
 ksys_read+0x28b/0x510 fs/read_write.c:619
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0xdb/0x120 fs/read_write.c:627
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Local variable wait created at:
 mempool_alloc+0x68/0x800 mm/mempool.c:378
 bio_alloc_bioset+0x32c/0x11c0 block/bio.c:468

CPU: 1 PID: 3791 Comm: udevd Not tainted 5.17.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================