Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 5351 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:rb_set_parent_color include/linux/rbtree_augmented.h:191 [inline] RIP: 0010:____rb_erase_color lib/rbtree.c:255 [inline] RIP: 0010:rb_erase+0x530/0xe70 lib/rbtree.c:445 Code: 00 00 74 08 4c 89 ef e8 3e 48 46 f6 4d 89 7d 00 49 8d 6f 01 48 8b 5c 24 08 48 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df <42> 80 3c 28 00 74 08 48 89 df e8 11 48 46 f6 48 89 2b 4c 89 fd 48 RSP: 0018:ffffc900042e7768 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: ffff8880b913f860 RDI: ffff88807ffea0c8 RBP: ffff888079b2a0c1 R08: ffff88807ffe9e07 R09: 1ffff1100fffd3c0 R10: dffffc0000000000 R11: ffffed100fffd3c1 R12: ffff888079b2a0c0 R13: dffffc0000000000 R14: 1ffff1100f365418 R15: ffff888079b2a0c0 FS: 00007fb49f0d06c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c46bc7e CR3: 000000007a22c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sched_core_dequeue kernel/sched/core.c:283 [inline] dequeue_task kernel/sched/core.c:2031 [inline] __do_set_cpus_allowed+0x4de/0x580 kernel/sched/core.c:2682 migrate_disable_switch kernel/sched/core.c:2299 [inline] __schedule+0x1a12/0x4b30 kernel/sched/core.c:6670 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6856 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6880 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12 htab_unlock_bucket kernel/bpf/hashtab.c:181 [inline] __htab_map_lookup_and_delete_elem+0x1704/0x1860 kernel/bpf/hashtab.c:1650 map_lookup_and_delete_elem+0x7e0/0x9e0 kernel/bpf/syscall.c:2026 __sys_bpf+0x5be/0x810 kernel/bpf/syscall.c:5681 __do_sys_bpf kernel/bpf/syscall.c:5734 [inline] __se_sys_bpf kernel/bpf/syscall.c:5732 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5732 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb49e379e79 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb49f0d0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb49e516058 RCX: 00007fb49e379e79 RDX: 0000000000000020 RSI: 00000000200000c0 RDI: 0000000000000015 RBP: 00007fb49e3e7916 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb49e516058 R15: 00007ffef6ffb898 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:191 [inline] RIP: 0010:____rb_erase_color lib/rbtree.c:255 [inline] RIP: 0010:rb_erase+0x530/0xe70 lib/rbtree.c:445 Code: 00 00 74 08 4c 89 ef e8 3e 48 46 f6 4d 89 7d 00 49 8d 6f 01 48 8b 5c 24 08 48 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df <42> 80 3c 28 00 74 08 48 89 df e8 11 48 46 f6 48 89 2b 4c 89 fd 48 RSP: 0018:ffffc900042e7768 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: ffff8880b913f860 RDI: ffff88807ffea0c8 RBP: ffff888079b2a0c1 R08: ffff88807ffe9e07 R09: 1ffff1100fffd3c0 R10: dffffc0000000000 R11: ffffed100fffd3c1 R12: ffff888079b2a0c0 R13: dffffc0000000000 R14: 1ffff1100f365418 R15: ffff888079b2a0c0 FS: 00007fb49f0d06c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c46bc7e CR3: 000000007a22c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 74 08 je 0xc 4: 4c 89 ef mov %r13,%rdi 7: e8 3e 48 46 f6 call 0xf646484a c: 4d 89 7d 00 mov %r15,0x0(%r13) 10: 49 8d 6f 01 lea 0x1(%r15),%rbp 14: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 27: fc ff df * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 11 48 46 f6 call 0xf646484a 39: 48 89 2b mov %rbp,(%rbx) 3c: 4c 89 fd mov %r15,%rbp 3f: 48 rex.W