loop5: detected capacity change from 0 to 255
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BUG: KCSAN: data-race in blkdev_get_by_dev / blkdev_put

write to 0xffff888101b9e728 of 4 bytes by task 13633 on cpu 0:
 blkdev_get_by_dev+0x88b/0x9e0
 blkdev_open+0xac/0x140 block/fops.c:498
 do_dentry_open+0x519/0x830 fs/open.c:824
 vfs_open+0x43/0x50 fs/open.c:958
 do_open fs/namei.c:3476 [inline]
 path_openat+0x16cf/0x1b30 fs/namei.c:3609
 do_filp_open+0x105/0x220 fs/namei.c:3636
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1213
 do_sys_open fs/open.c:1229 [inline]
 __do_sys_openat fs/open.c:1245 [inline]
 __se_sys_openat fs/open.c:1240 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1240
 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+0x44/0xae

read to 0xffff888101b9e728 of 4 bytes by task 28240 on cpu 1:
 blkdev_put+0x3b/0x440 block/bdev.c:902
 kill_block_super+0x7b/0x90 fs/super.c:1397
 deactivate_locked_super+0x6a/0xb0 fs/super.c:332
 mount_bdev+0x1fe/0x280 fs/super.c:1369
 isofs_mount+0x2d/0x40 fs/isofs/inode.c:1567
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610
 vfs_get_tree+0x49/0x190 fs/super.c:1497
 do_new_mount+0x200/0x650 fs/namespace.c:3040
 path_mount+0x4b1/0xb60 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x281/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3568
 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+0x44/0xae

value changed: 0x00000003 -> 0x00000004

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 28240 Comm: syz-executor.5 Not tainted 5.18.0-rc4-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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