syzbot

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BUG: KCSAN: data-race in _prb_read_valid / prb_reserve

write to 0xffffffff85aaa388 of 8 bytes by task 882 on cpu 1:
 prb_reserve+0x733/0xbd0
 vprintk_store+0x50b/0xad0 kernel/printk/printk.c:2284
 vprintk_emit+0xcc/0x430 kernel/printk/printk.c:2340
 dev_vprintk_emit+0x1c9/0x1f0 drivers/base/core.c:4698
 dev_printk_emit+0x7e/0xb0 drivers/base/core.c:4709
 __dev_printk+0xfa/0x110 drivers/base/core.c:4721
 _dev_warn+0x9d/0xd0 drivers/base/core.c:4765
 hid_parser_main+0x5e0/0x670 drivers/hid/hid-core.c:633
 hid_open_report+0x3ad/0x6c0 drivers/hid/hid-core.c:1265
 hid_parse include/linux/hid.h:1094 [inline]
 hid_generic_probe+0x2f/0x60 drivers/hid/hid-generic.c:63
 hid_device_probe+0x1d2/0x250 drivers/hid/hid-core.c:2603
 really_probe+0x1bf/0x660 drivers/base/dd.c:639
 __driver_probe_device+0x147/0x1a0 drivers/base/dd.c:778
 driver_probe_device drivers/base/dd.c:808 [inline]
 __device_attach_driver+0x235/0x5f0 drivers/base/dd.c:936
 bus_for_each_drv+0xe8/0x150 drivers/base/bus.c:427
 __device_attach+0x1a5/0x2c0 drivers/base/dd.c:1008
 device_initial_probe+0x16/0x20 drivers/base/dd.c:1057
 bus_probe_device+0x79/0x140 drivers/base/bus.c:487
 device_add+0x8bd/0xb20 drivers/base/core.c:3479
 hid_add_device+0x264/0x2e0 drivers/hid/hid-core.c:2755
 uhid_device_add_worker+0x27/0xa0 drivers/hid/uhid.c:73
 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289
 worker_thread+0x618/0xa70 kernel/workqueue.c:2436
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffffffff85aaa388 of 8 bytes by task 2724 on cpu 0:
 desc_read kernel/printk/printk_ringbuffer.c:482 [inline]
 desc_read_finalized_seq kernel/printk/printk_ringbuffer.c:1763 [inline]
 prb_read kernel/printk/printk_ringbuffer.c:1811 [inline]
 _prb_read_valid+0x3b8/0x950 kernel/printk/printk_ringbuffer.c:1891
 prb_read_valid+0x39/0x60 kernel/printk/printk_ringbuffer.c:1940
 syslog_print+0x4b2/0x580 kernel/printk/printk.c:1627
 do_syslog+0x741/0x7e0 kernel/printk/printk.c:1763
 __do_sys_syslog kernel/printk/printk.c:1855 [inline]
 __se_sys_syslog kernel/printk/printk.c:1853 [inline]
 __x64_sys_syslog+0x3f/0x50 kernel/printk/printk.c:1853
 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+0x63/0xcd

value changed: 0x0000000000000607 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2724 Comm: klogd Not tainted 6.2.0-rc6-syzkaller-00003-g22b8077d0fce-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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