loop3: p2 < > p4
loop3: partition table partially beyond EOD, 
==================================================================
BUG: KCSAN: data-race in data_alloc / data_push_tail

write to 0xffffffff8707f0e8 of 8 bytes by task 2173 on cpu 1:
 data_alloc+0x205/0x2b0 kernel/printk/printk_ringbuffer.c:1074
 prb_reserve+0x897/0xbd0 kernel/printk/printk_ringbuffer.c:1555
 vprintk_store+0x51c/0xb50 kernel/printk/printk.c:2196
 vprintk_emit+0xcc/0x430 kernel/printk/printk.c:2252
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2282
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
 _printk+0x76/0x96 kernel/printk/printk.c:2292
 disk_unlock_native_capacity block/partitions/core.c:521 [inline]
 blk_add_partition block/partitions/core.c:555 [inline]
 blk_add_partitions block/partitions/core.c:643 [inline]
 bdev_disk_changed+0x8ed/0xc30 block/partitions/core.c:685
 blkdev_get_whole block/bdev.c:684 [inline]
 blkdev_get_by_dev+0x3c0/0x9c0 block/bdev.c:821
 blkdev_open+0xac/0x140 block/fops.c:485
 do_dentry_open+0x51a/0x8b0 fs/open.c:878
 vfs_open+0x43/0x50 fs/open.c:1014
 do_open fs/namei.c:3499 [inline]
 path_openat+0x1671/0x1ad0 fs/namei.c:3632
 do_filp_open+0x105/0x220 fs/namei.c:3659
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1311
 do_sys_open fs/open.c:1327 [inline]
 __do_sys_openat fs/open.c:1343 [inline]
 __se_sys_openat fs/open.c:1338 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1338
 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+0x63/0xcd

read to 0xffffffff8707f0e8 of 8 bytes by task 28525 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:2196
 vprintk_emit+0xcc/0x430 kernel/printk/printk.c:2252
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2282
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
 _printk+0x76/0x96 kernel/printk/printk.c:2292
 blk_add_partitions block/partitions/core.c:632 [inline]
 bdev_disk_changed+0xa73/0xc30 block/partitions/core.c:685
 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+0x63/0xcd

value changed: 0x000000010001761d -> 0x0000000100018946

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 28525 Comm: syz-executor.3 Not tainted 5.19.0-syzkaller-09084-gc040862bfbd9-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
==================================================================
truncated
loop3: p2 start 2359808 is beyond EOD, truncated
loop3: p4 size 2097152 extends beyond EOD, truncated