WARNING: CPU: 0 PID: 1 at kernel/rcu/tree_plugin.h:438 __rcu_read_unlock+0x266/0x2e0 kernel/rcu/tree_plugin.h:432 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 1 Comm: 4fԁ2fԁ Not tainted 4.20.0-rc7+ #358 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 BUG: GPF in non-whitelisted uaccess (non-canonical address?) kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1 Comm: 4fԁ2fԁ Not tainted 4.20.0-rc7+ #358 ================================================================== Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 BUG: KASAN: stack-out-of-bounds in mm_update_next_owner+0x8ef/0x990 kernel/exit.c:449 RIP: 0010:copy_user_generic_unrolled+0x86/0xc0 arch/x86/lib/copy_user_64.S:66 Read of size 4 at addr ffff8881d9ab8124 by task syz-executor5/12160 Code: 4c 8b 5e 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 RSP: 0018:ffff8881dae06dc8 EFLAGS: 00010002 RAX: 0000000000000000 RBX: ffff8881dae06ed0 RCX: 0000000000000001 RDX: 0000000000000000 RSI: a400000800000009 RDI: ffff8881dae06ed0 RBP: ffff8881dae06df8 R08: ffff8881d9af0240 R09: ffffed103b5c0dda R10: ffffed103b5c0dda R11: ffff8881dae06ed7 R12: 0000000000000008 R13: 0000000000000001 R14: a400000800000009 R15: ffff8881d9af0240 FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000130 CR3: 00000001c1286000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: print_worker_info+0x39b/0x540 kernel/workqueue.c:4419 dump_stack_print_info+0xf7/0x120 lib/dump_stack.c:59 __dump_stack lib/dump_stack.c:76 [inline] dump_stack+0x1ca/0x2c6 lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 __warn.cold.8+0x20/0x45 kernel/panic.c:540 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:__rcu_read_unlock+0x266/0x2e0 kernel/rcu/tree_plugin.h:438 Code: 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 6f 41 c7 84 24 70 03 00 00 00 00 00 00 e9 5a fe ff ff <0f> 0b e9 da fe ff ff 4c 89 f7 e8 6b fb 58 00 e9 2a fe ff ff 4c 89 RSP: 0018:ffff8881dae07338 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 1ffff1103b5c0e68 RCX: 0000000000000000 RDX: 1ffff1103b5c0e74 RSI: 0000000000000000 RDI: ffff8881d9af0abc RBP: ffff8881dae07408 R08: ffff8881d9af0240 R09: 0000000000000008 R10: fffffbfff14a8001 R11: 0000000000000001 R12: 00000000d4b86648 R13: 1ffff1103b5c0e74 R14: ffff8881d9af05b0 R15: ffff8881dae073e0 rcu_read_unlock include/linux/rcupdate.h:660 [inline] select_task_rq_fair+0x67b/0x3380 kernel/sched/fair.c:6397 select_task_rq kernel/sched/core.c:1536 [inline] try_to_wake_up+0x4e7/0x1460 kernel/sched/core.c:2041 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1646 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 Modules linked in: ---[ end trace 82775103e9377cca ]--- RIP: 0010:copy_user_generic_unrolled+0x86/0xc0 arch/x86/lib/copy_user_64.S:66 Code: 4c 8b 5e 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 RSP: 0018:ffff8881dae06dc8 EFLAGS: 00010002 RAX: 0000000000000000 RBX: ffff8881dae06ed0 RCX: 0000000000000001 RDX: 0000000000000000 RSI: a400000800000009 RDI: ffff8881dae06ed0 RBP: ffff8881dae06df8 R08: ffff8881d9af0240 R09: ffffed103b5c0dda R10: ffffed103b5c0dda R11: ffff8881dae06ed7 R12: 0000000000000008 R13: 0000000000000001 R14: a400000800000009 R15: ffff8881d9af0240 FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000130 CR3: 00000001c1286000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400