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BUG: KCSAN: data-race in page_pool_put_unrefed_netmem / page_pool_release

write to 0xffff88811a138900 of 8 bytes by task 4163 on cpu 0:
 __ptr_ring_discard_one include/linux/ptr_ring.h:280 [inline]
 __ptr_ring_consume include/linux/ptr_ring.h:301 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:366 [inline]
 page_pool_empty_ring net/core/page_pool.c:1073 [inline]
 page_pool_scrub net/core/page_pool.c:1145 [inline]
 page_pool_release+0x28d/0x860 net/core/page_pool.c:1153
 page_pool_destroy+0x202/0x370 net/core/page_pool.c:1233
 xdp_test_run_teardown net/bpf/test_run.c:218 [inline]
 bpf_test_run_xdp_live+0xf79/0xfe0 net/bpf/test_run.c:396
 bpf_prog_test_run_xdp+0x4f5/0x910 net/bpf/test_run.c:1322
 bpf_prog_test_run+0x22a/0x390 kernel/bpf/syscall.c:4590
 __sys_bpf+0x4b9/0x7b0 kernel/bpf/syscall.c:6047
 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
 __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6137
 x64_sys_call+0x2aea/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88811a138900 of 8 bytes by task 4176 on cpu 1:
 __ptr_ring_produce include/linux/ptr_ring.h:106 [inline]
 page_pool_recycle_in_ring net/core/page_pool.c:748 [inline]
 page_pool_put_unrefed_netmem+0x38b/0x4b0 net/core/page_pool.c:869
 page_pool_put_netmem include/net/page_pool/helpers.h:343 [inline]
 page_pool_put_full_netmem include/net/page_pool/helpers.h:373 [inline]
 napi_pp_put_page+0xe9/0x200 net/core/skbuff.c:997
 skb_pp_recycle net/core/skbuff.c:1008 [inline]
 skb_free_head+0x12c/0x150 net/core/skbuff.c:1055
 skb_release_data+0x33b/0x370 net/core/skbuff.c:1086
 skb_release_all net/core/skbuff.c:1151 [inline]
 __kfree_skb+0x44/0x150 net/core/skbuff.c:1165
 sk_skb_reason_drop+0xbd/0x270 net/core/skbuff.c:1203
 kfree_skb_reason include/linux/skbuff.h:1275 [inline]
 udpv6_recvmsg+0x1d1/0xc30 net/ipv6/udp.c:590
 inet6_recvmsg+0x143/0x290 net/ipv6/af_inet6.c:678
 sock_recvmsg_nosec net/socket.c:1065 [inline]
 sock_recvmsg+0x95/0x170 net/socket.c:1087
 ____sys_recvmsg+0xf5/0x280 net/socket.c:2834
 ___sys_recvmsg+0x11f/0x370 net/socket.c:2876
 do_recvmmsg+0x1ef/0x540 net/socket.c:2971
 __sys_recvmmsg net/socket.c:3045 [inline]
 __do_sys_recvmmsg net/socket.c:3068 [inline]
 __se_sys_recvmmsg net/socket.c:3061 [inline]
 __x64_sys_recvmmsg+0xe5/0x170 net/socket.c:3061
 x64_sys_call+0x27a6/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:300
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffffea000410e680 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 4176 Comm: syz.4.197 Not tainted 6.17.0-rc1-syzkaller-00038-g0cc53520e68b #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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