I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
==================================================================
BUG: KCSAN: data-race in blkdev_read_iter / set_capacity_and_notify

write to 0xffff8881004316c8 of 8 bytes by task 24353 on cpu 1:
 set_capacity block/genhd.c:63 [inline]
 set_capacity_and_notify+0xab/0x1d0 block/genhd.c:77
 loop_set_size drivers/block/loop.c:231 [inline]
 loop_configure+0xd53/0xf50 drivers/block/loop.c:1054
 lo_ioctl+0x633/0x1280
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:588
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881004316c8 of 8 bytes by task 2290 on cpu 0:
 bdev_nr_sectors include/linux/genhd.h:205 [inline]
 bdev_nr_bytes include/linux/genhd.h:210 [inline]
 blkdev_read_iter+0x40/0x350 block/fops.c:568
 call_read_iter include/linux/fs.h:2080 [inline]
 new_sync_read fs/read_write.c:400 [inline]
 vfs_read+0x66c/0x750 fs/read_write.c:481
 ksys_read+0xd9/0x190 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+0x3e/0x50 fs/read_write.c:627
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000000 -> 0x0000000000040800

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2290 Comm: udevd Tainted: G        W         5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
blk_print_req_error: 8 callbacks suppressed
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 261104 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 33008, async page read
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 520 op 0x0:(READ) flags 0x80700 phys_seg 59 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 33008, async page read
Buffer I/O error on dev loop3, logical block 1, async page read
Buffer I/O error on dev loop3, logical block 2, async page read
Buffer I/O error on dev loop3, logical block 3, async page read
Buffer I/O error on dev loop3, logical block 4, async page read
Buffer I/O error on dev loop3, logical block 5, async page read
Buffer I/O error on dev loop3, logical block 6, async page read
Buffer I/O error on dev loop3, logical block 7, async page read
blk_print_req_error: 12 callbacks suppressed
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 61 prio class 0
I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0