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: 5347 Comm: syz.2.13 Not tainted 6.11.0-rc4-next-20240822-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:____rb_erase_color lib/rbtree.c:354 [inline] RIP: 0010:__rb_erase_color+0x2d7/0xa30 lib/rbtree.c:413 Code: 73 02 00 00 49 8d 5c 24 10 48 89 dd 48 c1 ed 03 42 80 7c 35 00 00 74 08 48 89 df e8 43 dc 44 f6 4c 8b 2b 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 2a dc 44 f6 41 f6 45 00 01 48 89 RSP: 0018:ffffc900040677a8 EFLAGS: 00010046 RAX: 000000000016e360 RBX: ffff888026485aa0 RCX: dffffc0000000000 RDX: ffffffff81681190 RSI: ffff88805d7bd848 RDI: ffff888026485a90 RBP: 1ffff11004c90b54 R08: 0000000000000219 R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: ffff888026485a90 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 000055555c8e4500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3271bff8 CR3: 000000007b746000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rb_erase_augmented include/linux/rbtree_augmented.h:331 [inline] rb_erase_augmented_cached include/linux/rbtree_augmented.h:340 [inline] __dequeue_entity+0x953/0xd30 kernel/sched/fair.c:863 dequeue_entity+0x7b0/0x1a70 kernel/sched/fair.c:5516 dequeue_entities+0x234/0xfa0 kernel/sched/fair.c:7090 task_dead_fair+0xf2/0x3c0 kernel/sched/fair.c:8576 finish_task_switch+0x370/0x870 kernel/sched/core.c:5215 context_switch kernel/sched/core.c:5314 [inline] __schedule+0x1852/0x4b30 kernel/sched/core.c:6677 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 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x44/0x50 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:401 [inline] do_group_exit+0x1f7/0x2c0 kernel/exit.c:1085 __do_sys_exit_group kernel/exit.c:1099 [inline] __se_sys_exit_group kernel/exit.c:1097 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 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: 0033:0x7f5073179e79 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:00007ffc7d67b728 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5073179e79 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffc7d67b77c R08: 00007ffc7d67b80f R09: 0000000000010856 R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000032 R13: 0000000000010856 R14: 000000000000fd86 R15: 00007ffc7d67b7d0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:____rb_erase_color lib/rbtree.c:354 [inline] RIP: 0010:__rb_erase_color+0x2d7/0xa30 lib/rbtree.c:413 Code: 73 02 00 00 49 8d 5c 24 10 48 89 dd 48 c1 ed 03 42 80 7c 35 00 00 74 08 48 89 df e8 43 dc 44 f6 4c 8b 2b 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 2a dc 44 f6 41 f6 45 00 01 48 89 RSP: 0018:ffffc900040677a8 EFLAGS: 00010046 RAX: 000000000016e360 RBX: ffff888026485aa0 RCX: dffffc0000000000 RDX: ffffffff81681190 RSI: ffff88805d7bd848 RDI: ffff888026485a90 RBP: 1ffff11004c90b54 R08: 0000000000000219 R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: ffff888026485a90 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 000055555c8e4500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3271bff8 CR3: 000000007b746000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 73 02 jae 0x4 2: 00 00 add %al,(%rax) 4: 49 8d 5c 24 10 lea 0x10(%r12),%rbx 9: 48 89 dd mov %rbx,%rbp c: 48 c1 ed 03 shr $0x3,%rbp 10: 42 80 7c 35 00 00 cmpb $0x0,0x0(%rbp,%r14,1) 16: 74 08 je 0x20 18: 48 89 df mov %rbx,%rdi 1b: e8 43 dc 44 f6 call 0xf644dc63 20: 4c 8b 2b mov (%rbx),%r13 23: 4d 89 ef mov %r13,%r15 26: 49 c1 ef 03 shr $0x3,%r15 * 2a: 43 80 3c 37 00 cmpb $0x0,(%r15,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ef mov %r13,%rdi 34: e8 2a dc 44 f6 call 0xf644dc63 39: 41 f6 45 00 01 testb $0x1,0x0(%r13) 3e: 48 rex.W 3f: 89 .byte 0x89