loop1: p220 size 32768 extends beyond EOD, truncated
loop1: p221 start 8388608 is beyond EOD, truncated
loop1: p222 size 32768 extends beyond EOD, truncated
loop1: p223 start 8388608 is beyond EOD, truncated
loop1: p224 size 32768 extends beyond EOD, truncated
loop1: p225 start 8388608 is beyond EOD, 
==================================================================
BUG: KCSAN: data-race in data_alloc / data_push_tail

write to 0xffffffff883f1628 of 8 bytes by task 25722 on cpu 0:
 data_alloc+0x216/0x2c0 kernel/printk/printk_ringbuffer.c:1082
 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2266
 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2326
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2360
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45
 _printk+0x7a/0xa0 kernel/printk/printk.c:2370
 __netdev_printk+0x2d1/0x3e0 net/core/dev.c:11633
 netdev_info+0x99/0xc0 net/core/dev.c:11680
 __dev_set_promiscuity+0x165/0x340 net/core/dev.c:8570
 dev_set_promiscuity+0x3b/0x90 net/core/dev.c:8608
 nbp_delete_promisc net/bridge/br_if.c:254 [inline]
 del_nbp+0xc3/0x770 net/bridge/br_if.c:340
 br_dev_delete+0x4e/0xe0 net/bridge/br_if.c:386
 br_net_exit_batch_rtnl+0xca/0x170 net/bridge/br.c:369
 cleanup_net+0x3df/0x830 net/core/net_namespace.c:633
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3312
 worker_thread+0x526/0x730 kernel/workqueue.c:3393
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffffffff883f1628 of 8 bytes by task 27090 on cpu 1:
 data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline]
 data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:679
 data_realloc kernel/printk/printk_ringbuffer.c:1143 [inline]
 prb_reserve_in_last+0x773/0xc10 kernel/printk/printk_ringbuffer.c:1440
 vprintk_store+0x45b/0x810 kernel/printk/printk.c:2243
 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2326
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2360
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45
 _printk+0x7a/0xa0 kernel/printk/printk.c:2370
 disk_unlock_native_capacity block/partitions/core.c:512 [inline]
 blk_add_partition block/partitions/core.c:535 [inline]
 blk_add_partitions block/partitions/core.c:623 [inline]
 bdev_disk_changed+0x969/0xbb0 block/partitions/core.c:683
 loop_reread_partitions drivers/block/loop.c:537 [inline]
 loop_set_status+0x4ab/0x550 drivers/block/loop.c:1339