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BUG: KCSAN: data-race in _prb_read_valid / prb_reserve

write to 0xffffffff866a26e8 of 8 bytes by task 7056 on cpu 1:
 prb_reserve+0x740/0xb60
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2301
 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2383
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2422
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:68
 _printk+0x7a/0xa0 kernel/printk/printk.c:2432
 __netdev_printk+0x2d1/0x3e0 net/core/dev.c:11825
 netdev_info+0x99/0xc0 net/core/dev.c:11872
 __dev_set_promiscuity+0x165/0x340 net/core/dev.c:8634
 __dev_set_rx_mode+0x128/0x180
 dev_uc_sync_multiple+0x1d7/0x200 net/core/dev_addr_lists.c:773
 bond_set_rx_mode+0x129/0x1a0 drivers/net/bonding/bond_main.c:4733
 __dev_set_rx_mode+0x15e/0x180 net/core/dev.c:8766
 dev_uc_del+0x82/0xa0 net/core/dev_addr_lists.c:714
 macsec_dev_stop+0x366/0x3a0 drivers/net/macsec.c:3651
 __dev_close_many+0x127/0x1e0 net/core/dev.c:1560
 dev_close_many+0x103/0x240 net/core/dev.c:1585
 unregister_netdevice_many_notify+0x263/0x11b0 net/core/dev.c:11381
 unregister_netdevice_many+0x19/0x20 net/core/dev.c:11469
 rtnl_newlink_create net/core/rtnetlink.c:3570 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3759 [inline]
 rtnl_newlink+0x140c/0x1690 net/core/rtnetlink.c:3772
 rtnetlink_rcv_msg+0x6aa/0x710 net/core/rtnetlink.c:6675
 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2551
 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6693
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:744
 ____sys_sendmsg+0x312/0x410 net/socket.c:2607
 ___sys_sendmsg net/socket.c:2661 [inline]
 __sys_sendmsg+0x1d9/0x270 net/socket.c:2690
 __do_sys_sendmsg net/socket.c:2699 [inline]
 __se_sys_sendmsg net/socket.c:2697 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2697
 x64_sys_call+0x2689/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff866a26e8 of 8 bytes by task 3008 on cpu 0:
 desc_read kernel/printk/printk_ringbuffer.c:486 [inline]
 desc_read_finalized_seq kernel/printk/printk_ringbuffer.c:1874 [inline]
 prb_read kernel/printk/printk_ringbuffer.c:1922 [inline]
 _prb_read_valid+0x1ec/0xba0 kernel/printk/printk_ringbuffer.c:2113
 prb_read_valid+0x3d/0x60 kernel/printk/printk_ringbuffer.c:2182
 syslog_print+0x26f/0x760 kernel/printk/printk.c:1631
 do_syslog+0x397/0x7e0 kernel/printk/printk.c:1766
 __do_sys_syslog kernel/printk/printk.c:1858 [inline]
 __se_sys_syslog kernel/printk/printk.c:1856 [inline]
 __x64_sys_syslog+0x43/0x50 kernel/printk/printk.c:1856
 x64_sys_call+0x1677/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:104
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x000000000000029b -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3008 Comm: klogd Tainted: G        W          6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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