truncated
loop5: p2 size 1073741824 extends beyond EOD, truncated
loop5: p3 start 6815744 is beyond EOD, truncated
loop5: p4 size 32768 extends beyond EOD, 
==================================================================
BUG: KCSAN: data-race in data_push_tail / vsnprintf

write to 0xffffffff86e808f4 of 1 bytes by task 23350 on cpu 1:
 vsnprintf+0xe2a/0xe80
 vscnprintf+0x3e/0x80 lib/vsprintf.c:2888
 printk_sprint kernel/printk/printk.c:2092 [inline]
 vprintk_store+0x5f2/0xb50 kernel/printk/printk.c:2206
 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:522 [inline]
 blk_add_partition block/partitions/core.c:566 [inline]
 blk_add_partitions block/partitions/core.c:644 [inline]
 bdev_disk_changed+0x924/0xc30 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 0xffffffff86e808f0 of 8 bytes by task 23342 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_partition block/partitions/core.c:562 [inline]
 blk_add_partitions block/partitions/core.c:644 [inline]
 bdev_disk_changed+0x858/0xc30 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: 0x00000000fffff959 -> 0x000000000a646564

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 23342 Comm: syz-executor.5 Not tainted 5.19.0-rc4-syzkaller-00044-g1a0e93df1e10-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2022
==================================================================
truncated