============================= WARNING: suspicious RCU usage 5.15.177-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.7.4839/24933: #0: ffffffff8dc42708 (rtnl_mutex){+.+.}-{3:3}, at: ip_mroute_setsockopt+0x15e/0x1540 net/ipv4/ipmr.c:1362 stack backtrace: CPU: 0 PID: 24933 Comm: syz.7.4839 Not tainted 5.15.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 __rhashtable_lookup include/linux/rhashtable.h:594 [inline] rhltable_lookup+0x7e5/0x7f0 include/linux/rhashtable.h:688 mr_mfc_find_any_parent+0xb4/0x1e0 net/ipv4/ipmr_base.c:83 ip_mr_forward+0x213/0x1010 net/ipv4/ipmr.c:1949 ipmr_cache_resolve net/ipv4/ipmr.c:1003 [inline] ipmr_mfc_add+0x243a/0x2df0 net/ipv4/ipmr.c:1262 ip_mroute_setsockopt+0xfa9/0x1540 net/ipv4/ipmr.c:1459 do_ip_setsockopt net/ipv4/ip_sockglue.c:947 [inline] ip_setsockopt+0x5b3/0x3fb0 net/ipv4/ip_sockglue.c:1430 __sys_setsockopt+0x57e/0x990 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2211 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f95f775eda9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f95f55c8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f95f7977fa0 RCX: 00007f95f775eda9 RDX: 00000000000000d2 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f95f77e02a0 R08: 000000000000003c R09: 0000000000000000 R10: 0000000020000200 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f95f7977fa0 R15: 00007ffe58b0c048 ============================= WARNING: suspicious RCU usage 5.15.177-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.7.4839/24933: #0: ffffffff8dc42708 (rtnl_mutex){+.+.}-{3:3}, at: ip_mroute_setsockopt+0x15e/0x1540 net/ipv4/ipmr.c:1362 stack backtrace: CPU: 0 PID: 24933 Comm: syz.7.4839 Not tainted 5.15.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 rht_ptr_rcu include/linux/rhashtable.h:369 [inline] __rhashtable_lookup include/linux/rhashtable.h:599 [inline] rhltable_lookup+0x582/0x7f0 include/linux/rhashtable.h:688 mr_mfc_find_any_parent+0xb4/0x1e0 net/ipv4/ipmr_base.c:83 ip_mr_forward+0x213/0x1010 net/ipv4/ipmr.c:1949 ipmr_cache_resolve net/ipv4/ipmr.c:1003 [inline] ipmr_mfc_add+0x243a/0x2df0 net/ipv4/ipmr.c:1262 ip_mroute_setsockopt+0xfa9/0x1540 net/ipv4/ipmr.c:1459 do_ip_setsockopt net/ipv4/ip_sockglue.c:947 [inline] ip_setsockopt+0x5b3/0x3fb0 net/ipv4/ip_sockglue.c:1430 __sys_setsockopt+0x57e/0x990 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2211 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f95f775eda9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f95f55c8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f95f7977fa0 RCX: 00007f95f775eda9 RDX: 00000000000000d2 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f95f77e02a0 R08: 000000000000003c R09: 0000000000000000 R10: 0000000020000200 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f95f7977fa0 R15: 00007ffe58b0c048 ============================= WARNING: suspicious RCU usage 5.15.177-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.7.4839/24933: #0: ffffffff8dc42708 (rtnl_mutex){+.+.}-{3:3}, at: ip_mroute_setsockopt+0x15e/0x1540 net/ipv4/ipmr.c:1362 stack backtrace: CPU: 0 PID: 24933 Comm: syz.7.4839 Not tainted 5.15.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 __rhashtable_lookup include/linux/rhashtable.h:614 [inline] rhltable_lookup+0x676/0x7f0 include/linux/rhashtable.h:688 mr_mfc_find_any_parent+0xb4/0x1e0 net/ipv4/ipmr_base.c:83 ip_mr_forward+0x213/0x1010 net/ipv4/ipmr.c:1949 ipmr_cache_resolve net/ipv4/ipmr.c:1003 [inline] ipmr_mfc_add+0x243a/0x2df0 net/ipv4/ipmr.c:1262 ip_mroute_setsockopt+0xfa9/0x1540 net/ipv4/ipmr.c:1459 do_ip_setsockopt net/ipv4/ip_sockglue.c:947 [inline] ip_setsockopt+0x5b3/0x3fb0 net/ipv4/ip_sockglue.c:1430 __sys_setsockopt+0x57e/0x990 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2211 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f95f775eda9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f95f55c8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f95f7977fa0 RCX: 00007f95f775eda9 RDX: 00000000000000d2 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f95f77e02a0 R08: 000000000000003c R09: 0000000000000000 R10: 0000000020000200 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f95f7977fa0 R15: 00007ffe58b0c048