=============================
WARNING: suspicious RCU usage
4.15.0+ #10 Not tainted
-----------------------------
./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
3 locks held by syz-executor2/15385:
 #0:  (&ctx->mutex){+.+.}, at: [<00000000ba7d2a45>] perf_event_ctx_lock_nested+0x21b/0x450 kernel/events/core.c:1253
 #1:  (bpf_event_mutex){+.+.}, at: [<0000000007cb7c41>] perf_event_query_prog_array+0x10e/0x280 kernel/trace/bpf_trace.c:876
 #2:  (rcu_read_lock){....}, at: [<00000000569b1296>] bpf_prog_array_copy_to_user+0x0/0x4d0 kernel/bpf/core.c:1568

stack backtrace:
CPU: 1 PID: 15385 Comm: syz-executor2 Not tainted 4.15.0+ #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4592
 rcu_preempt_sleep_check include/linux/rcupdate.h:301 [inline]
 ___might_sleep+0x385/0x470 kernel/sched/core.c:6079
 __might_sleep+0x95/0x190 kernel/sched/core.c:6067
 __might_fault+0xab/0x1d0 mm/memory.c:4532
 _copy_to_user+0x2c/0xc0 lib/usercopy.c:25
 copy_to_user include/linux/uaccess.h:155 [inline]
 bpf_prog_array_copy_to_user+0x217/0x4d0 kernel/bpf/core.c:1587
 bpf_prog_array_copy_info+0x17b/0x1c0 kernel/bpf/core.c:1685
 perf_event_query_prog_array+0x196/0x280 kernel/trace/bpf_trace.c:877
 _perf_ioctl kernel/events/core.c:4737 [inline]
 perf_ioctl+0x3e1/0x1480 kernel/events/core.c:4757
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x453299
RSP: 002b:00007f5b3d630c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000020106000 RSI: 00000000c008240a RDI: 0000000000000013
RBP: 000000000000027a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2c10
R13: 00000000ffffffff R14: 00007f5b3d6316d4 R15: 0000000000000000
BUG: sleeping function called from invalid context at lib/usercopy.c:25
in_atomic(): 1, irqs_disabled(): 0, pid: 15385, name: syz-executor2
3 locks held by syz-executor2/15385:
 #0:  (&ctx->mutex){+.+.}, at: [<00000000ba7d2a45>] perf_event_ctx_lock_nested+0x21b/0x450 kernel/events/core.c:1253
 #1:  (bpf_event_mutex){+.+.}, at: [<0000000007cb7c41>] perf_event_query_prog_array+0x10e/0x280 kernel/trace/bpf_trace.c:876
 #2:  (rcu_read_lock){....}, at: [<00000000569b1296>] bpf_prog_array_copy_to_user+0x0/0x4d0 kernel/bpf/core.c:1568
CPU: 1 PID: 15385 Comm: syz-executor2 Not tainted 4.15.0+ #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6114
 __might_sleep+0x95/0x190 kernel/sched/core.c:6067
 __might_fault+0xab/0x1d0 mm/memory.c:4532
 _copy_to_user+0x2c/0xc0 lib/usercopy.c:25
 copy_to_user include/linux/uaccess.h:155 [inline]
 bpf_prog_array_copy_to_user+0x217/0x4d0 kernel/bpf/core.c:1587
 bpf_prog_array_copy_info+0x17b/0x1c0 kernel/bpf/core.c:1685
 perf_event_query_prog_array+0x196/0x280 kernel/trace/bpf_trace.c:877
 _perf_ioctl kernel/events/core.c:4737 [inline]
 perf_ioctl+0x3e1/0x1480 kernel/events/core.c:4757
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x453299
RSP: 002b:00007f5b3d630c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000020106000 RSI: 00000000c008240a RDI: 0000000000000013
RBP: 000000000000027a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2c10
R13: 00000000ffffffff R14: 00007f5b3d6316d4 R15: 0000000000000000
overlayfs: missing 'lowerdir'
tmpfs: No value for mount option 'âÛ÷${	 ë6<,3'
cgroup: cgroup2: unknown option ""
tmpfs: No value for mount option 'âÛ÷${	 ë6<,3'
can: request_module (can-proto-0) failed.
autofs4:pid:15802:autofs4_fill_super: called with bogus options
autofs4:pid:15826:autofs4_fill_super: called with bogus options
EXT4-fs (sda1): re-mounted. Opts: 
EXT4-fs (sda1): re-mounted. Opts: 
rpcbind: RPC call returned error 22
rpcbind: RPC call returned error 22
can: request_module (can-proto-3) failed.
can: request_module (can-proto-3) failed.
IPVS: ftp: loaded support on port[0] = 21
9pnet_virtio: no channels available for device ./file0
9pnet_virtio: no channels available for device ./file0
9pnet_virtio: no channels available for device ./file0
9pnet_virtio: no channels available for device ./file0
IPVS: ftp: loaded support on port[0] = 21