general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 11367 Comm: syz.0.3147 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:165 [inline]
RIP: 0010:____rb_erase_color lib/rbtree.c:255 [inline]
RIP: 0010:__rb_erase_color+0xe7/0xaf0 lib/rbtree.c:413
Code: 8b 4d c0 80 3c 01 00 74 09 48 8b 7d c8 e8 71 d2 3a ff 4d 89 6e 08 4c 89 33 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 4b d2 3a ff 4c 89 f0 48 83 c8 01 49
RSP: 0018:ffffc90000a476c0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8881154dd190 RCX: dffffc0000000000
RDX: ffffffff819b0210 RSI: 1ffff11021322e4a RDI: ffff88811599d998
RBP: ffffc90000a47720 R08: dffffc0000000000 R09: ffffed1021322e4e
R10: ffffed1021322e4e R11: 1ffff11021322e4d R12: 1ffff11022a9ba30
R13: 0000000000000000 R14: ffff88811599d998 R15: ffff8881154dd180
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000010d2d7000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 rb_erase_augmented include/linux/rbtree_augmented.h:305 [inline]
 rb_erase_augmented_cached include/linux/rbtree_augmented.h:314 [inline]
 vma_interval_tree_remove+0xadf/0xb00 mm/interval_tree.c:23
 __remove_shared_vm_struct mm/mmap.c:160 [inline]
 unlink_file_vma+0xda/0xf0 mm/mmap.c:175
 free_pgtables+0x139/0x280 mm/memory.c:490
 exit_mmap+0x407/0x860 mm/mmap.c:3247
 __mmput+0x93/0x320 kernel/fork.c:1180
 mmput+0x50/0x150 kernel/fork.c:1203
 exit_mm kernel/exit.c:554 [inline]
 do_exit+0x9d2/0x27a0 kernel/exit.c:876
 do_group_exit+0x141/0x310 kernel/exit.c:1003
 get_signal+0x66a/0x1480 kernel/signal.c:2907
 arch_do_signal_or_restart+0xc1/0x10f0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff942a9e785
Code: Unable to access opcode bytes at RIP 0x7ff942a9e75b.
RSP: 002b:00007fff6f878740 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 00007ff942cc2fa0 RCX: 00007ff942a9e785
RDX: 00007fff6f878780 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ff942cc4da0 R08: 0000000000000000 R09: 00103315842e8d16
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000604a2
R13: 00007ff942cc3090 R14: ffffffffffffffff R15: 00007fff6f8788c0
 </TASK>
Modules linked in:
---[ end trace c07ab8e09c8436ec ]---
RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:165 [inline]
RIP: 0010:____rb_erase_color lib/rbtree.c:255 [inline]
RIP: 0010:__rb_erase_color+0xe7/0xaf0 lib/rbtree.c:413
Code: 8b 4d c0 80 3c 01 00 74 09 48 8b 7d c8 e8 71 d2 3a ff 4d 89 6e 08 4c 89 33 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 4b d2 3a ff 4c 89 f0 48 83 c8 01 49
RSP: 0018:ffffc90000a476c0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8881154dd190 RCX: dffffc0000000000
RDX: ffffffff819b0210 RSI: 1ffff11021322e4a RDI: ffff88811599d998
RBP: ffffc90000a47720 R08: dffffc0000000000 R09: ffffed1021322e4e
R10: ffffed1021322e4e R11: 1ffff11021322e4d R12: 1ffff11022a9ba30
R13: 0000000000000000 R14: ffff88811599d998 R15: ffff8881154dd180
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000010d2c0000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	8b 4d c0             	mov    -0x40(%rbp),%ecx
   3:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
   7:	74 09                	je     0x12
   9:	48 8b 7d c8          	mov    -0x38(%rbp),%rdi
   d:	e8 71 d2 3a ff       	call   0xff3ad283
  12:	4d 89 6e 08          	mov    %r13,0x8(%r14)
  16:	4c 89 33             	mov    %r14,(%rbx)
  19:	4c 89 e8             	mov    %r13,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ef             	mov    %r13,%rdi
  33:	e8 4b d2 3a ff       	call   0xff3ad283
  38:	4c 89 f0             	mov    %r14,%rax
  3b:	48 83 c8 01          	or     $0x1,%rax
  3f:	49                   	rex.WB