============================= WARNING: suspicious RCU usage 5.13.0-rc7-syzkaller #0 Not tainted ----------------------------- kernel/sched/core.c:4912 Illegal context switch in RCU-sched read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 0 no locks held by syz-executor.5/8841. stack backtrace: CPU: 1 PID: 8841 Comm: syz-executor.5 Not tainted 5.13.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 schedule_debug kernel/sched/core.c:4912 [inline] __schedule+0x1647/0x23e0 kernel/sched/core.c:5038 schedule+0xcf/0x270 kernel/sched/core.c:5226 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x268/0x6a0 kernel/time/hrtimer.c:1896 hrtimer_nanosleep+0x1f9/0x4a0 kernel/time/hrtimer.c:1949 common_nsleep+0xa2/0xc0 kernel/time/posix-timers.c:1227 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline] __se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline] __x64_sys_clock_nanosleep+0x2f4/0x430 kernel/time/posix-timers.c:1245 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x48a7a1 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f RSP: 002b:00007fff72a13d70 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000048a7a1 RDX: 00007fff72a13db0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fff72a13e4c R08: 0000000000000000 R09: 00007fff72bc8080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 000000000003b8f5 R14: 0000000000000013 R15: 00007fff72a13eb0