can: request_module (can-proto-0) failed. ============================= WARNING: suspicious RCU usage 4.14.307-syzkaller #0 Not tainted ----------------------------- net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor.2/2709: #0: (cb_lock){++++}, at: [] genl_rcv+0x15/0x40 net/netlink/genetlink.c:635 #1: (genl_mutex){+.+.}, at: [] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [] genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623 stack backtrace: CPU: 0 PID: 2709 Comm: syz-executor.2 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 tipc_bearer_find+0x1ff/0x2f0 net/tipc/bearer.c:177 tipc_nl_compat_link_set+0x40b/0xb90 net/tipc/netlink_compat.c:807 __tipc_nl_compat_doit net/tipc/netlink_compat.c:316 [inline] tipc_nl_compat_doit+0x192/0x5d0 net/tipc/netlink_compat.c:364 tipc_nl_compat_handle net/tipc/netlink_compat.c:1215 [inline] tipc_nl_compat_recv+0xa0b/0xae0 net/tipc/netlink_compat.c:1297 genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f05dfc4c0f9 RSP: 002b:00007f05de1be168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f05dfd6bf80 RCX: 00007f05dfc4c0f9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007f05dfca7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb239276f R14: 00007f05de1be300 R15: 0000000000022000 can: request_module (can-proto-0) failed. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 2749 Comm: syz-executor.5 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x149 lib/fault-inject.c:149 should_failslab+0xd6/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc+0x28e/0x3c0 mm/slab.c:3550 ptlock_alloc+0x1d/0x70 mm/memory.c:4871 ptlock_init include/linux/mm.h:1764 [inline] pgtable_page_ctor include/linux/mm.h:1798 [inline] pte_alloc_one+0x57/0x100 arch/x86/mm/pgtable.c:33 __do_huge_pmd_anonymous_page mm/huge_memory.c:568 [inline] do_huge_pmd_anonymous_page+0x8fc/0x1700 mm/huge_memory.c:731 create_huge_pmd mm/memory.c:4007 [inline] __handle_mm_fault+0x2ac4/0x4620 mm/memory.c:4210 handle_mm_fault+0x455/0x9c0 mm/memory.c:4276 __do_page_fault+0x549/0xad0 arch/x86/mm/fault.c:1442 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1126 RIP: 0010:copy_user_generic_unrolled+0x89/0xc0 arch/x86/lib/copy_user_64.S:67 RSP: 0018:ffff88807ad17e48 EFLAGS: 00050202 RAX: ffffed100f5a2fd8 RBX: 0000000000000020 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffff88807ad17ea0 RDI: 00000000200000c0 RBP: ffff88807ad17ea0 R08: 0000000000000000 R09: ffffed100f5a2fd7 R10: ffff88807ad17ebf R11: ffff88807b2bc400 R12: 00000000200000c0 R13: 00007ffffffff000 R14: 00000000200000e0 R15: 0000000000000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:112 [inline] _copy_to_user+0xaa/0xd0 lib/usercopy.c:35 copy_to_user include/linux/uaccess.h:155 [inline] SYSC_getitimer kernel/time/itimer.c:115 [inline] SyS_getitimer+0xbd/0xd0 kernel/time/itimer.c:107 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f28f63410f9 RSP: 002b:00007f28f48b3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000024 RAX: ffffffffffffffda RBX: 00007f28f6460f80 RCX: 00007f28f63410f9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007f28f48b31d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff9fbe0e4f R14: 00007f28f48b3300 R15: 0000000000022000