------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(!hlock->nest_lock) ------------[ cut here ]------------ Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'task_struct' (offset 1432, size 2)! WARNING: CPU: 1 PID: 38 at mm/usercopy.c:83 usercopy_warn+0xee/0x110 mm/usercopy.c:78 Kernel panic - not syncing: panic_on_warn set ... list_add corruption. next->prev should be prev (ffff8881daf2d798), but was 0b7e0c8e49cc0400. (next=ffff8881d9b4a4f0). CPU: 1 PID: 38 Comm: فd Not tainted 4.20.0-rc3+ #312 ------------[ cut here ]------------ Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kernel BUG at lib/list_debug.c:25! ------------[ cut here ]------------ invalid opcode: 0000 [#1] PREEMPT SMP KASAN kernel BUG at mm/slab.c:4425! CPU: 0 PID: 8652 Comm: syz-executor607 Not tainted 4.20.0-rc3+ #312 WARNING: CPU: 1 PID: 38 at kernel/rcu/tree_plugin.h:438 __rcu_read_unlock+0x266/0x2e0 kernel/rcu/tree_plugin.h:432 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Modules linked in: RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23 CPU: 1 PID: 38 Comm: فd Not tainted 4.20.0-rc3+ #312 Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37 d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48 c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RSP: 0000:ffff8881dae07588 EFLAGS: 00010082 usercopy: Kernel memory overwrite attempt detected to SLAB object 'signal_cache' (offset 1328, size 23)! RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000 ------------[ cut here ]------------ RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005 kernel BUG at mm/usercopy.c:102! RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020 R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230 R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798 FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:60 [inline] list_add include/linux/list.h:79 [inline] list_move include/linux/list.h:171 [inline] detach_tasks kernel/sched/fair.c:7298 [inline] load_balance+0x1b8d/0x39a0 kernel/sched/fair.c:8731 rebalance_domains+0x845/0xdc0 kernel/sched/fair.c:9109 run_rebalance_domains+0x38d/0x500 kernel/sched/fair.c:9731 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0033:0x4005dd Code: c9 00 04 00 66 0f 1f 84 00 00 00 00 00 48 8b 05 f1 2e 2d 00 48 85 c0 74 11 bf 3c e8 4b 00 b9 0e 00 00 00 48 89 c6 f3 a6 75 01 48 89 c7 e9 9a ec 01 00 66 2e 0f 1f 84 00 00 00 00 00 8b 05 4a RSP: 002b:00007fff144765a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 00000000006d2190 RDX: 0000000000402410 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000006cc0a8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace eeb5734c13709e17 ]--- invalid opcode: 0000 [#2] PREEMPT SMP KASAN CPU: 1 PID: 38 Comm: فd Tainted: G D 4.20.0-rc3+ #312 RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37 d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48 c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90 RSP: 0000:ffff8881dae07588 EFLAGS: 00010082 Code: c0 e8 f7 dc b1 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 80 d5 34 88 ff 75 d0 41 57 e8 e7 28 98 ff <0f> 0b e8 cc dc b1 ff e8 97 13 f5 ff 8b 95 e4 fe ff ff 4c 89 e1 31 RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000 RSP: 0018:ffff8881d9b49438 EFLAGS: 00010086 RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005 RAX: 0000000000000068 RBX: ffffffff88291020 RCX: 0000000000000000 RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020 RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005 R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230 RBP: ffff8881d9b49490 R08: ffff8881d9b4a440 R09: ffffed103b5e3ef8 R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798 R10: ffffed103b5e3ef8 R11: ffff8881daf1f7c7 R12: ffffffff8914da1d FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 R13: ffffffff8834d3e0 R14: ffffffff8834d320 R15: ffffffff8834d2e0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: ---[ end trace eeb5734c13709e18 ]--- RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23 Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37 d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48 c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b RSP: 0000:ffff8881dae07588 EFLAGS: 00010082 RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005 RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020 R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230 R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798 FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400