KCSAN: data-race in __perf_event_overflow / perf_event_attach_bpf

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __perf_event_overflow / perf_event_attach_bpf_prog bpf trace	6				1	332d	332d	0/29	auto-obsoleted due to no activity on 2025/04/12 23:45
==================================================================
BUG: KCSAN: data-race in __perf_event_overflow / perf_event_attach_bpf_prog

write to 0xffff88811ae674e8 of 8 bytes by task 18281 on cpu 1:
 perf_event_attach_bpf_prog+0x138/0x1d0 kernel/trace/bpf_trace.c:1940
 __perf_event_set_bpf_prog+0x44c/0x470 kernel/events/core.c:11328
 _perf_ioctl kernel/events/core.c:6376 [inline]
 perf_ioctl+0x717/0x12e0 kernel/events/core.c:6436
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583
 x64_sys_call+0x14b0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88811ae674e8 of 8 bytes by task 18249 on cpu 0:
 __perf_event_overflow+0x252/0x910 kernel/events/core.c:10401
 perf_swevent_overflow kernel/events/core.c:10536 [inline]
 perf_swevent_event+0x39e/0x450 kernel/events/core.c:10574
 perf_tp_event+0x2ec/0x9f0 kernel/events/core.c:11081
 perf_trace_run_bpf_submit+0xac/0x110 kernel/events/core.c:11005
 do_perf_trace_kmalloc include/trace/events/kmem.h:57 [inline]
 perf_trace_kmalloc+0xe1/0x110 include/trace/events/kmem.h:57
 __do_trace_kmalloc include/trace/events/kmem.h:57 [inline]
 trace_kmalloc include/trace/events/kmem.h:57 [inline]
 __do_kmalloc_node mm/slub.c:5658 [inline]
 __kmalloc_noprof+0x4bf/0x5a0 mm/slub.c:5669
 kmalloc_noprof include/linux/slab.h:961 [inline]
 kzalloc_noprof include/linux/slab.h:1094 [inline]
 hash_ipmark4_add+0xd5c/0xff0 net/netfilter/ipset/ip_set_hash_gen.h:950
 hash_ipmark4_uadt+0x48b/0x550 net/netfilter/ipset/ip_set_hash_ipmark.c:159
 call_ad+0x231/0x630 net/netfilter/ipset/ip_set_core.c:1751
 ip_set_ad+0x5c0/0x690 net/netfilter/ipset/ip_set_core.c:1841
 ip_set_uadd+0x41/0x50 net/netfilter/ipset/ip_set_core.c:1864
 nfnetlink_rcv_msg+0x4c6/0x590 net/netfilter/nfnetlink.c:302
 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2550
 nfnetlink_rcv+0x167/0x16c0 net/netfilter/nfnetlink.c:669
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5c0/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x145/0x180 net/socket.c:742
 ____sys_sendmsg+0x31e/0x4a0 net/socket.c:2592
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2646
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2683 [inline]
 __se_sys_sendmsg net/socket.c:2681 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2681
 x64_sys_call+0x17ba/0x3000 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000000 -> 0xffffc900045bd000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 18249 Comm: syz.1.4737 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
==================================================================
Set syz1 is full, maxelem 65536 reached
syz.1.4737 (18249) used greatest stack depth: 8184 bytes left