Oops: general protection fault, probably for non-canonical address 0xdffffc0000000014: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000000a0-0x00000000000000a7] CPU: 1 UID: 0 PID: 5338 Comm: syz.2.9 Not tainted 6.11.0-rc4-next-20240821-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:is_same_group kernel/sched/fair.c:411 [inline] RIP: 0010:find_matching_se kernel/sched/fair.c:448 [inline] RIP: 0010:check_preempt_wakeup_fair+0x471/0xb00 kernel/sched/fair.c:8679 Code: 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 80 28 95 00 4d 8b 3f 49 8d ae a0 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 60 28 95 00 48 8b 5d 00 49 8d af RSP: 0000:ffffc900040279e0 EFLAGS: 00010006 RAX: 0000000000000014 RBX: ffff8880b913eb00 RCX: ffffffff816719b8 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888021460000 RBP: 00000000000000a0 R08: ffff888021460007 R09: 1ffff1100428c000 R10: dffffc0000000000 R11: ffffed100428c001 R12: ffff8880b903ea40 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 000055558e2d2500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f96e33a5000 CR3: 000000007bd08000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: wakeup_preempt+0xd8/0x2a0 kernel/sched/core.c:2128 ttwu_do_activate+0x1f8/0x7e0 kernel/sched/core.c:3666 ttwu_queue kernel/sched/core.c:3940 [inline] try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266 swake_up_locked kernel/sched/swait.c:29 [inline] complete_with_flags kernel/sched/completion.c:24 [inline] complete+0xac/0x1c0 kernel/sched/completion.c:47 random_recv_done+0x138/0x1e0 drivers/char/hw_random/virtio-rng.c:48 vring_interrupt+0x21d/0x380 drivers/virtio/virtio_ring.c:2595 __handle_irq_event_percpu+0x29a/0xa80 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210 handle_edge_irq+0x25f/0xc20 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:247 [inline] call_irq_handler arch/x86/kernel/irq.c:259 [inline] __common_interrupt+0x136/0x230 arch/x86/kernel/irq.c:285 common_interrupt+0x5e/0xd0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0033:0x7fb3f765892a Code: 74 28 25 ff 0f 00 00 83 f0 3d 8d 04 c0 89 c2 c1 ea 04 31 c2 69 d2 2d eb d4 27 89 d0 c1 e8 0f 31 c2 81 e2 ff 0f 00 00 4c 31 ca <80> 3d 17 97 2b 00 00 0f 84 a9 00 00 00 4c 89 e6 48 8b 0d f7 96 2b RSP: 002b:00007ffe698949c0 EFLAGS: 00000282 RAX: 000000000001fb06 RBX: 00007fb3f8445720 RCX: ffffffff810a868e RDX: ffffffff810a7a57 RSI: ffffffff810a868e RDI: 00007fb3f6601000 RBP: 0000000000000004 R08: 00007fb3f7900000 R09: ffffffff810a7f51 R10: 00000000810a8692 R11: 0000000000000010 R12: ffffffff810a7f51 R13: 00007fb3f79161c8 R14: 0000000000000008 R15: 0000000000009007 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:is_same_group kernel/sched/fair.c:411 [inline] RIP: 0010:find_matching_se kernel/sched/fair.c:448 [inline] RIP: 0010:check_preempt_wakeup_fair+0x471/0xb00 kernel/sched/fair.c:8679 Code: 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 80 28 95 00 4d 8b 3f 49 8d ae a0 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 60 28 95 00 48 8b 5d 00 49 8d af RSP: 0000:ffffc900040279e0 EFLAGS: 00010006 RAX: 0000000000000014 RBX: ffff8880b913eb00 RCX: ffffffff816719b8 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888021460000 RBP: 00000000000000a0 R08: ffff888021460007 R09: 1ffff1100428c000 R10: dffffc0000000000 R11: ffffed100428c001 R12: ffff8880b903ea40 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 000055558e2d2500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f96e33a5000 CR3: 000000007bd08000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 4c 89 f8 add %cl,-0x8(%rcx,%rcx,4) 6: 48 c1 e8 03 shr $0x3,%rax a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) f: 74 08 je 0x19 11: 4c 89 ff mov %r15,%rdi 14: e8 80 28 95 00 call 0x952899 19: 4d 8b 3f mov (%r15),%r15 1c: 49 8d ae a0 00 00 00 lea 0xa0(%r14),%rbp 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 ef mov %rbp,%rdi 34: e8 60 28 95 00 call 0x952899 39: 48 8b 5d 00 mov 0x0(%rbp),%rbx 3d: 49 rex.WB 3e: 8d .byte 0x8d 3f: af scas %es:(%rdi),%eax