syzbot

BUG: unable to handle page fault for address: ffffed1800000020
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23fff2067 P4D 23fff2067 
PUD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 299 Comm: syz-executor616 Tainted: G        W         5.15.148-syzkaller-00718-g993bed180178 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:__rb_insert lib/rbtree.c:115 [inline]
RIP: 0010:__rb_insert_augmented+0x91/0x610 lib/rbtree.c:459
Code: 00 74 08 4c 89 ef e8 5e 0b 2b ff 49 8b 45 00 a8 01 0f 85 60 05 00 00 48 89 5d a0 48 89 45 c0 48 8d 58 08 49 89 de 49 c1 ee 03 <43> 80 3c 26 00 74 08 48 89 df e8 30 0b 2b ff 48 89 d8 48 8b 1b 4c
RSP: 0018:ffffc90000a378f8 EFLAGS: 00010a02
RAX: ffff88c0000000f8 RBX: ffff88c000000100 RCX: dffffc0000000000
RDX: ffffffff81a50880 RSI: ffff8881092ccf40 RDI: ffff88811f3e5870
RBP: ffffc90000a37960 R08: dffffc0000000000 R09: ffff88811f3e5878
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88811e2f42a8 R14: 1ffff11800000020 R15: ffff88811f3e5870
FS:  00005555566843c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1800000020 CR3: 000000011e2f3000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rb_insert_augmented include/linux/rbtree_augmented.h:50 [inline]
 vma_interval_tree_insert_after+0x2be/0x2d0 mm/interval_tree.c:57
 dup_mmap kernel/fork.c:631 [inline]
 dup_mm kernel/fork.c:1521 [inline]
 copy_mm+0xba2/0x13e0 kernel/fork.c:1573
 copy_process+0x1149/0x3290 kernel/fork.c:2264
 kernel_clone+0x21e/0x9e0 kernel/fork.c:2662
 __do_sys_clone kernel/fork.c:2788 [inline]
 __se_sys_clone kernel/fork.c:2772 [inline]
 __x64_sys_clone+0x23f/0x290 kernel/fork.c:2772
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f2eb0c6db73
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffc6f84f138 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2eb0c6db73
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 0079746972756365
R10: 0000555556684690 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f2eb0cface0 R14: 0000000000000006 R15: 00007ffc6f84f268
 </TASK>
Modules linked in:
CR2: ffffed1800000020
---[ end trace 94e288d1876ddc96 ]---
RIP: 0010:__rb_insert lib/rbtree.c:115 [inline]
RIP: 0010:__rb_insert_augmented+0x91/0x610 lib/rbtree.c:459
Code: 00 74 08 4c 89 ef e8 5e 0b 2b ff 49 8b 45 00 a8 01 0f 85 60 05 00 00 48 89 5d a0 48 89 45 c0 48 8d 58 08 49 89 de 49 c1 ee 03 <43> 80 3c 26 00 74 08 48 89 df e8 30 0b 2b ff 48 89 d8 48 8b 1b 4c
RSP: 0018:ffffc90000a378f8 EFLAGS: 00010a02
RAX: ffff88c0000000f8 RBX: ffff88c000000100 RCX: dffffc0000000000
RDX: ffffffff81a50880 RSI: ffff8881092ccf40 RDI: ffff88811f3e5870
RBP: ffffc90000a37960 R08: dffffc0000000000 R09: ffff88811f3e5878
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88811e2f42a8 R14: 1ffff11800000020 R15: ffff88811f3e5870
FS:  00005555566843c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1800000020 CR3: 000000011e2f3000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 74 08 4c          	add    %dh,0x4c(%rax,%rcx,1)
   4:	89 ef                	mov    %ebp,%edi
   6:	e8 5e 0b 2b ff       	call   0xff2b0b69
   b:	49 8b 45 00          	mov    0x0(%r13),%rax
   f:	a8 01                	test   $0x1,%al
  11:	0f 85 60 05 00 00    	jne    0x577
  17:	48 89 5d a0          	mov    %rbx,-0x60(%rbp)
  1b:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  1f:	48 8d 58 08          	lea    0x8(%rax),%rbx
  23:	49 89 de             	mov    %rbx,%r14
  26:	49 c1 ee 03          	shr    $0x3,%r14
* 2a:	43 80 3c 26 00       	cmpb   $0x0,(%r14,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 30 0b 2b ff       	call   0xff2b0b69
  39:	48 89 d8             	mov    %rbx,%rax
  3c:	48 8b 1b             	mov    (%rbx),%rbx
  3f:	4c                   	rex.WR