syzbot

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BUG: KCSAN: assert: race in __block_task kernel/sched/sched.h:2773 [inline]
BUG: KCSAN: assert: race in dequeue_entities+0x6df/0x760 kernel/sched/fair.c:7180

race at unknown origin, with assert no writes to 0xffff8881001cb1e8 of 4 bytes by task 4926 on cpu 0:
 __block_task kernel/sched/sched.h:2773 [inline]
 dequeue_entities+0x6df/0x760 kernel/sched/fair.c:7180
 pick_next_entity kernel/sched/fair.c:5627 [inline]
 pick_task_fair kernel/sched/fair.c:8859 [inline]
 pick_next_task_fair+0x7d/0x410 kernel/sched/fair.c:8879
 __pick_next_task kernel/sched/core.c:5968 [inline]
 pick_next_task kernel/sched/core.c:6490 [inline]
 __schedule+0x284/0x940 kernel/sched/core.c:6644
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x55/0xc0 kernel/sched/core.c:6782
 synchronize_rcu_expedited+0x611/0x7a0 kernel/rcu/tree_exp.h:991
 synchronize_rcu+0x46/0x320 kernel/rcu/tree.c:4095
 __nf_tables_abort net/netfilter/nf_tables_api.c:10911 [inline]
 nf_tables_abort+0x38f5/0x4340 net/netfilter/nf_tables_api.c:10930
 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:593 [inline]
 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline]
 nfnetlink_rcv+0x10ce/0x15c0 net/netfilter/nfnetlink.c:665
 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

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4926 Comm: syz.2.327 Not tainted 6.12.0-rc5-syzkaller-00299-g11066801dd4b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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