netlink: 28 bytes leftover after parsing attributes in process `syz.2.521'.
netlink: 28 bytes leftover after parsing attributes in process `syz.2.521'.
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 6342 Comm: syz.2.521 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b30/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 fs_reclaim_acquire+0x118/0x1c4 mm/page_alloc.c:4597
 might_alloc include/linux/sched/mm.h:206 [inline]
 slab_pre_alloc_hook+0x38/0xec mm/slab.h:492
 slab_alloc_node mm/slub.c:3134 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x94/0x3e4 mm/slub.c:3233
 radix_tree_node_alloc+0xa0/0x340 lib/radix-tree.c:274
 idr_get_free+0x240/0x8fc lib/radix-tree.c:1504
 idr_alloc_u32+0x10c/0x268 lib/idr.c:46
 tcf_idr_check_alloc+0x548/0x6fc net/sched/act_api.c:613
 tcf_ct_init+0x278/0xf70 net/sched/act_ct.c:1287
 tcf_action_init_1+0x33c/0x5b4 net/sched/act_api.c:1071
 tcf_action_init+0x1dc/0x55c net/sched/act_api.c:1130
 tcf_action_add net/sched/act_api.c:1542 [inline]
 tc_ctl_action+0x308/0x9a8 net/sched/act_api.c:1601
 rtnetlink_rcv_msg+0x9d4/0xd04 net/core/rtnetlink.c:5650
 netlink_rcv_skb+0x208/0x3c4 net/netlink/af_netlink.c:2507
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5668
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x624/0x8b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x6e8/0x9cc net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x61c/0x920 net/socket.c:2436
 ___sys_sendmsg+0x1d0/0x240 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg net/socket.c:2526 [inline]
 __arm64_sys_sendmsg+0x1a8/0x254 net/socket.c:2526
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584