truncated
==================================================================
BUG: KCSAN: data-race in data_push_tail / number

write to 0xffffffff86e86a7a of 1 bytes by task 14144 on cpu 1:
 number+0x8a7/0xbe0 lib/vsprintf.c:561
 vsnprintf+0xa5e/0xe80 lib/vsprintf.c:2848
 vscnprintf+0x3e/0x80 lib/vsprintf.c:2888
 printk_sprint kernel/printk/printk.c:2225 [inline]
 vprintk_store+0x5f2/0xb50 kernel/printk/printk.c:2339
 vprintk_emit+0xcc/0x4e0 kernel/printk/printk.c:2385
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2415
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:52
 _printk+0x76/0x96 kernel/printk/printk.c:2425
 blk_add_partition block/partitions/core.c:553 [inline]
 blk_add_partitions block/partitions/core.c:644 [inline]
 bdev_disk_changed+0x805/0xc30 block/partitions/core.c:686
 loop_reread_partitions drivers/block/loop.c:518 [inline]
 loop_set_status+0x44f/0x4f0 drivers/block/loop.c:1317
 lo_ioctl+0x83e/0x1290
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:614
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

read to 0xffffffff86e86a78 of 8 bytes by task 14143 on cpu 0:
 data_make_reusable kernel/printk/printk_ringbuffer.c:590 [inline]
 data_push_tail+0x10f/0x440 kernel/printk/printk_ringbuffer.c:675
 data_alloc+0xbc/0x2b0 kernel/printk/printk_ringbuffer.c:1046
 prb_reserve+0x897/0xbd0 kernel/printk/printk_ringbuffer.c:1555
 vprintk_store+0x51c/0xb50 kernel/printk/printk.c:2329
 vprintk_emit+0xcc/0x4e0 kernel/printk/printk.c:2385
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2415
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:52
 _printk+0x76/0x96 kernel/printk/printk.c:2425
 disk_unlock_native_capacity block/partitions/core.c:522 [inline]
 blk_add_partition block/partitions/core.c:556 [inline]
 blk_add_partitions block/partitions/core.c:644 [inline]
 bdev_disk_changed+0x8ed/0xc30 block/partitions/core.c:686
 loop_reread_partitions drivers/block/loop.c:518 [inline]
 loop_set_status+0x44f/0x4f0 drivers/block/loop.c:1317
 lo_ioctl+0x83e/0x1290
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:614
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

value changed: 0x0000000100031ce0 -> 0x0000003632317020

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14143 Comm: syz-executor.1 Not tainted 5.19.0-rc3-syzkaller-00038-gca1fdab7fd27-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
loop1: p116 start 10 is beyond EOD, truncated
loop1: p117 start 10 is beyond EOD, truncated