loop2: p3 start 225 is beyond EOD, truncated
loop2: p4 size 3657465856 extends beyond EOD, truncated
==================================================================
BUG: KCSAN: data-race in blkdev_get_whole / blkdev_put

write to 0xffff88810042c0a0 of 4 bytes by task 9787 on cpu 0:
 blkdev_get_whole+0x308/0x350 fs/block_dev.c:1270
 blkdev_get_by_dev+0x2ad/0x8d0 fs/block_dev.c:1417
 blkdev_open+0xb3/0x130 fs/block_dev.c:1512
 do_dentry_open+0x529/0x850 fs/open.c:826
 vfs_open+0x43/0x50 fs/open.c:949
 do_open fs/namei.c:3374 [inline]
 path_openat+0x1787/0x1f20 fs/namei.c:3507
 do_filp_open+0xe9/0x200 fs/namei.c:3534
 do_sys_openat2+0xa3/0x250 fs/open.c:1204
 do_sys_open fs/open.c:1220 [inline]
 __do_sys_openat fs/open.c:1236 [inline]
 __se_sys_openat fs/open.c:1231 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1231
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88810042c0a0 of 4 bytes by task 1040 on cpu 1:
 blkdev_put+0x3b/0x4e0 fs/block_dev.c:1531
 blkdev_reread_part block/ioctl.c:105 [inline]
 blkdev_common_ioctl+0x101d/0x1040 block/ioctl.c:510
 blkdev_ioctl+0x16e/0x3c0 block/ioctl.c:579
 block_ioctl+0x6d/0x80 fs/block_dev.c:1604
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:1055
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:1055
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000003 -> 0x00000004

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1040 Comm: systemd-udevd Not tainted 5.14.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
 loop2: p1 p2 p3 p4
loop2: p1 start 10 is beyond EOD, truncated
loop2: p2 size 1073872896 extends beyond EOD, truncated
loop2: p3 start 225 is beyond EOD, truncated
loop2: p4 size 3657465856 extends beyond EOD, truncated
 loop2: p1 p2 p3 p4
loop2: p1 start 10 is beyond EOD, 
truncated
loop2: p2 size 1073872896 extends beyond EOD, 
truncated
loop2: p3 start 225 is beyond EOD, truncated
loop2: p4 size 3657465856 extends beyond EOD, truncated