============================= WARNING: suspicious RCU usage 5.15.178-syzkaller #0 Not tainted ----------------------------- include/linux/rhashtable.h:594 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz.2.98/4479: #0: ffff800016cb4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 stack backtrace: CPU: 1 PID: 4479 Comm: syz.2.98 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x188/0x1e0 kernel/locking/lockdep.c:6571 __rhashtable_lookup include/linux/rhashtable.h:594 [inline] rhltable_lookup+0x6a0/0x6a8 include/linux/rhashtable.h:688 mr_mfc_find_any_parent+0xe8/0x20c net/ipv4/ipmr_base.c:83 ip_mr_forward+0x214/0xe10 net/ipv4/ipmr.c:1949 ipmr_cache_resolve net/ipv4/ipmr.c:1003 [inline] ipmr_mfc_add+0x1ea0/0x28a0 net/ipv4/ipmr.c:1262 ip_mroute_setsockopt+0xaf8/0xe94 net/ipv4/ipmr.c:1459 do_ip_setsockopt net/ipv4/ip_sockglue.c:947 [inline] ip_setsockopt+0x618/0x32cc net/ipv4/ip_sockglue.c:1430 raw_setsockopt+0x104/0x2b8 net/ipv4/raw.c:863 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3448 __sys_setsockopt+0x3a8/0x6b4 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2211 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 ============================= WARNING: suspicious RCU usage 5.15.178-syzkaller #0 Not tainted ----------------------------- include/linux/rhashtable.h:369 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz.2.98/4479: #0: ffff800016cb4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 stack backtrace: CPU: 1 PID: 4479 Comm: syz.2.98 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x188/0x1e0 kernel/locking/lockdep.c:6571 rht_ptr_rcu include/linux/rhashtable.h:369 [inline] __rhashtable_lookup include/linux/rhashtable.h:599 [inline] rhltable_lookup+0x45c/0x6a8 include/linux/rhashtable.h:688 mr_mfc_find_any_parent+0xe8/0x20c net/ipv4/ipmr_base.c:83 ip_mr_forward+0x214/0xe10 net/ipv4/ipmr.c:1949 ipmr_cache_resolve net/ipv4/ipmr.c:1003 [inline] ipmr_mfc_add+0x1ea0/0x28a0 net/ipv4/ipmr.c:1262 ip_mroute_setsockopt+0xaf8/0xe94 net/ipv4/ipmr.c:1459 do_ip_setsockopt net/ipv4/ip_sockglue.c:947 [inline] ip_setsockopt+0x618/0x32cc net/ipv4/ip_sockglue.c:1430 raw_setsockopt+0x104/0x2b8 net/ipv4/raw.c:863 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3448 __sys_setsockopt+0x3a8/0x6b4 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2211 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 ============================= WARNING: suspicious RCU usage 5.15.178-syzkaller #0 Not tainted ----------------------------- include/linux/rhashtable.h:614 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz.2.98/4479: #0: ffff800016cb4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 stack backtrace: CPU: 1 PID: 4479 Comm: syz.2.98 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x188/0x1e0 kernel/locking/lockdep.c:6571 __rhashtable_lookup include/linux/rhashtable.h:614 [inline] rhltable_lookup+0x554/0x6a8 include/linux/rhashtable.h:688 mr_mfc_find_any_parent+0xe8/0x20c net/ipv4/ipmr_base.c:83 ip_mr_forward+0x214/0xe10 net/ipv4/ipmr.c:1949 ipmr_cache_resolve net/ipv4/ipmr.c:1003 [inline] ipmr_mfc_add+0x1ea0/0x28a0 net/ipv4/ipmr.c:1262 ip_mroute_setsockopt+0xaf8/0xe94 net/ipv4/ipmr.c:1459 do_ip_setsockopt net/ipv4/ip_sockglue.c:947 [inline] ip_setsockopt+0x618/0x32cc net/ipv4/ip_sockglue.c:1430 raw_setsockopt+0x104/0x2b8 net/ipv4/raw.c:863 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3448 __sys_setsockopt+0x3a8/0x6b4 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2211 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584