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BUG: KCSAN: data-race in desc_read_finalized_seq / prb_reserve

write to 0xffffffff866b5970 of 8 bytes by task 16818 on cpu 1:
 prb_reserve+0x740/0xb60
 vprintk_store+0x558/0x870 kernel/printk/printk.c:2326
 vprintk_emit+0x168/0x690 kernel/printk/printk.c:2408
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447
 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82
 _printk+0x7a/0xa0 kernel/printk/printk.c:2457
 seq_buf_do_printk+0xf2/0x190 lib/seq_buf.c:126
 mem_cgroup_print_oom_meminfo+0x156/0x230 mm/memcontrol.c:1595
 dump_header+0xa5/0x2d0 mm/oom_kill.c:469
 oom_kill_process+0x341/0x4c0 mm/oom_kill.c:1040
 out_of_memory+0x9af/0xbe0 mm/oom_kill.c:1178
 mem_cgroup_out_of_memory+0x13e/0x190 mm/memcontrol.c:1647
 mem_cgroup_oom mm/memcontrol.c:1670 [inline]
 try_charge_memcg+0x508/0x7f0 mm/memcontrol.c:2297
 obj_cgroup_charge_pages+0xbd/0x1a0 mm/memcontrol.c:2636
 __memcg_kmem_charge_page+0x9d/0x170 mm/memcontrol.c:2663
 __alloc_frozen_pages_noprof+0x1bc/0x340 mm/page_alloc.c:4756
 alloc_pages_mpol+0xb4/0x260 mm/mempolicy.c:2270
 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline]
 alloc_pages_noprof+0xe8/0x130 mm/mempolicy.c:2361
 vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
 __vmalloc_area_node mm/vmalloc.c:3669 [inline]
 __vmalloc_node_range_noprof+0x6e5/0xe70 mm/vmalloc.c:3846
 __kvmalloc_node_noprof+0x121/0x170 mm/util.c:684
 ip_set_alloc+0x1f/0x30 net/netfilter/ipset/ip_set_core.c:261
 hash_netiface_create+0x273/0x730 net/netfilter/ipset/ip_set_hash_gen.h:1568
 ip_set_create+0x3b1/0x970 net/netfilter/ipset/ip_set_core.c:1109
 nfnetlink_rcv_msg+0x4a9/0x570 net/netfilter/nfnetlink.c:302
 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2543
 nfnetlink_rcv+0x16c/0x15d0 net/netfilter/nfnetlink.c:667
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:733
 ____sys_sendmsg+0x326/0x4b0 net/socket.c:2573
 ___sys_sendmsg net/socket.c:2627 [inline]
 __sys_sendmsg+0x19d/0x230 net/socket.c:2659
 __do_sys_sendmsg net/socket.c:2664 [inline]
 __se_sys_sendmsg net/socket.c:2662 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2662
 x64_sys_call+0x2734/0x2dc0 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 0xffffffff866b5970 of 8 bytes by task 2989 on cpu 0:
 desc_read kernel/printk/printk_ringbuffer.c:486 [inline]
 desc_read_finalized_seq+0x157/0x280 kernel/printk/printk_ringbuffer.c:1874
 prb_read kernel/printk/printk_ringbuffer.c:1922 [inline]
 _prb_read_valid+0x140/0x6c0 kernel/printk/printk_ringbuffer.c:2113
 prb_read_valid+0x3d/0x60 kernel/printk/printk_ringbuffer.c:2182
 syslog_print+0x259/0x540 kernel/printk/printk.c:1650
 do_syslog+0x3a1/0x7f0 kernel/printk/printk.c:1785
 __do_sys_syslog kernel/printk/printk.c:1877 [inline]
 __se_sys_syslog kernel/printk/printk.c:1875 [inline]
 __x64_sys_syslog+0x43/0x50 kernel/printk/printk.c:1875
 x64_sys_call+0x29be/0x2dc0 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: 0x00000000000005dc -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 2989 Comm: klogd Not tainted 6.14.0-rc2-syzkaller-00185-g128c8f96eb86 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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