BUG: unable to handle page fault for address: ffffdc0000000008 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 100026067 P4D 100026067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 6.0.0-rc1-syzkaller-00049-g4e55e22d3d9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: events free_work RIP: 0010:entity_before kernel/sched/fair.c:585 [inline] RIP: 0010:__entity_less kernel/sched/fair.c:621 [inline] RIP: 0010:rb_add_cached include/linux/rbtree.h:174 [inline] RIP: 0010:__enqueue_entity kernel/sched/fair.c:629 [inline] RIP: 0010:put_prev_entity+0x11d/0x4c0 kernel/sched/fair.c:4722 Code: 00 0f 85 ec 02 00 00 4c 8b 7d 50 ba 01 00 00 00 49 be 00 00 00 00 00 fc ff df eb 03 48 89 c3 48 8d 7b 40 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 19 02 00 00 4c 3b 7b 40 4c 8d 63 10 78 06 4c RSP: 0000:ffffc900000cfad0 EFLAGS: 00010802 RAX: 1fffe00000000008 RBX: ffff000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff8881f6837bf0 RDI: ffff000000000040 RBP: ffff8881002cd600 R08: ffff8881002cd610 R09: ffff8881f6837bc0 R10: fffffbfff11bd2ca R11: 0000000000000001 R12: ffff88810e8e8098 R13: ffff8881f6837bc0 R14: dffffc0000000000 R15: 000000004543bbc4 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffdc0000000008 CR3: 0000000007825000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pick_next_task_fair+0xa42/0xf80 kernel/sched/fair.c:7443 __pick_next_task kernel/sched/core.c:5804 [inline] pick_next_task kernel/sched/core.c:6313 [inline] __schedule+0x3a3/0x26f0 kernel/sched/core.c:6458 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6663 __cond_resched+0x13/0x20 kernel/sched/core.c:8299 _cond_resched include/linux/sched.h:2056 [inline] __vunmap+0x875/0xd30 mm/vmalloc.c:2697 free_work+0x58/0x70 mm/vmalloc.c:97 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2ea/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Modules linked in: CR2: ffffdc0000000008 ---[ end trace 0000000000000000 ]--- RIP: 0010:entity_before kernel/sched/fair.c:585 [inline] RIP: 0010:__entity_less kernel/sched/fair.c:621 [inline] RIP: 0010:rb_add_cached include/linux/rbtree.h:174 [inline] RIP: 0010:__enqueue_entity kernel/sched/fair.c:629 [inline] RIP: 0010:put_prev_entity+0x11d/0x4c0 kernel/sched/fair.c:4722 Code: 00 0f 85 ec 02 00 00 4c 8b 7d 50 ba 01 00 00 00 49 be 00 00 00 00 00 fc ff df eb 03 48 89 c3 48 8d 7b 40 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 19 02 00 00 4c 3b 7b 40 4c 8d 63 10 78 06 4c RSP: 0000:ffffc900000cfad0 EFLAGS: 00010802 RAX: 1fffe00000000008 RBX: ffff000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff8881f6837bf0 RDI: ffff000000000040 RBP: ffff8881002cd600 R08: ffff8881002cd610 R09: ffff8881f6837bc0 R10: fffffbfff11bd2ca R11: 0000000000000001 R12: ffff88810e8e8098 R13: ffff8881f6837bc0 R14: dffffc0000000000 R15: 000000004543bbc4 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffdc0000000008 CR3: 0000000007825000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 0f add %cl,(%rdi) 2: 85 ec test %ebp,%esp 4: 02 00 add (%rax),%al 6: 00 4c 8b 7d add %cl,0x7d(%rbx,%rcx,4) a: 50 push %rax b: ba 01 00 00 00 mov $0x1,%edx 10: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14 17: fc ff df 1a: eb 03 jmp 0x1f 1c: 48 89 c3 mov %rax,%rbx 1f: 48 8d 7b 40 lea 0x40(%rbx),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 0f 85 19 02 00 00 jne 0x24e 35: 4c 3b 7b 40 cmp 0x40(%rbx),%r15 39: 4c 8d 63 10 lea 0x10(%rbx),%r12 3d: 78 06 js 0x45 3f: 4c rex.WR