general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 0 PID: 3992 Comm: syz-executor.4 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unmap_page_range+0x79/0xa20 mm/memory.c:1533
Code: 40 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 7a b5 12 00 4c 89 74 24 18 48 8b 1b 48 83 c3 50 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 58 b5 12 00 4d 89 fe 49 c1 ee 24
RSP: 0018:ffffc90002d9f5c0 EFLAGS: 00010206
RAX: 000000000000000a RBX: 0000000000000050 RCX: ffff88803f2cba00
RDX: ffff88803f2cba00 RSI: 00007f79f68b0000 RDI: 00007f79f66b0000
RBP: ffffc90002d9f790 R08: ffffffff81bd8ce4 R09: ffffed102a5f9969
R10: ffffed102a5f9969 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888000114b58 R14: ffff888000114b58 R15: 00007f79f66b0000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe4f2cbb27 CR3: 0000000035285000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unmap_vmas+0x202/0x390 mm/memory.c:1615
 exit_mmap+0x3c6/0x6f0 mm/mmap.c:3170
 __mmput+0x111/0x3a0 kernel/fork.c:1113
 exit_mm+0x211/0x2f0 kernel/exit.c:507
 do_exit+0x688/0x24f0 kernel/exit.c:819
 do_group_exit+0x168/0x2d0 kernel/exit.c:929
 get_signal+0x1740/0x2120 kernel/signal.c:2830
 arch_do_signal_or_restart+0x9c/0x730 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x191/0x220 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f79f8138ae9
Code: Unable to access opcode bytes at RIP 0x7f79f8138abf.
RSP: 002b:00007f79f56ae188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f79f824bf60 RCX: 00007f79f8138ae9
RDX: 0000000020000040 RSI: 0000000000004601 RDI: 0000000000000003
RBP: 00007f79f8192f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8c1891df R14: 00007f79f56ae300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 75f9d67b7e439f9a ]---
RIP: 0010:unmap_page_range+0x79/0xa20 mm/memory.c:1533
Code: 40 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 7a b5 12 00 4c 89 74 24 18 48 8b 1b 48 83 c3 50 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 58 b5 12 00 4d 89 fe 49 c1 ee 24
RSP: 0018:ffffc90002d9f5c0 EFLAGS: 00010206
RAX: 000000000000000a RBX: 0000000000000050 RCX: ffff88803f2cba00
RDX: ffff88803f2cba00 RSI: 00007f79f68b0000 RDI: 00007f79f66b0000
RBP: ffffc90002d9f790 R08: ffffffff81bd8ce4 R09: ffffed102a5f9969
R10: ffffed102a5f9969 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888000114b58 R14: ffff888000114b58 R15: 00007f79f66b0000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd9c0967e0 CR3: 000000007028c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	40                   	rex
   1:	48 89 d8             	mov    %rbx,%rax
   4:	48 c1 e8 03          	shr    $0x3,%rax
   8:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
   d:	74 08                	je     0x17
   f:	48 89 df             	mov    %rbx,%rdi
  12:	e8 7a b5 12 00       	callq  0x12b591
  17:	4c 89 74 24 18       	mov    %r14,0x18(%rsp)
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	48 83 c3 50          	add    $0x50,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 58 b5 12 00       	callq  0x12b591
  39:	4d 89 fe             	mov    %r15,%r14
  3c:	49 c1 ee 24          	shr    $0x24,%r14