================================================ WARNING: lock held when returning to user space! 4.17.0-rc3+ #37 Not tainted ------------------------------------------------ syz-executor0/31844 is leaving the kernel with locks still held! 1 lock held by syz-executor0/31844: #0: 00000000dcedd219 (rcu_read_lock){....}, at: ip6_route_del+0xea/0x13f0 net/ipv6/route.c:3206 BUG: scheduling while atomic: syz-executor0/31844/0x00000002 INFO: lockdep is turned off. Modules linked in: Kernel panic - not syncing: scheduling while atomic CPU: 0 PID: 31844 Comm: syz-executor0 Not tainted 4.17.0-rc3+ #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 panic+0x22f/0x4de kernel/panic.c:184 __schedule_bug.cold.85+0xdf/0xdf kernel/sched/core.c:3290 schedule_debug kernel/sched/core.c:3307 [inline] __schedule+0x139e/0x1e30 kernel/sched/core.c:3412 schedule+0xef/0x430 kernel/sched/core.c:3549 exit_to_usermode_loop+0x220/0x310 arch/x86/entry/common.c:152 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:265 [inline] do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455979 RSP: 002b:00007f92e1a3dc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007f92e1a3e6d4 RCX: 0000000000455979 RDX: 00000000200001c0 RSI: 000000000000890c RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000003c8 R14: 00000000006f9b60 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..