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: 2654 Comm: syz-executor.5 Not tainted 5.14.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unlink_anon_vmas+0x67/0x600 mm/rmap.c:398
Code: 89 e7 e8 4c 54 0d 00 4d 8b 3c 24 4d 39 fc 4c 89 64 24 08 0f 84 cb 02 00 00 45 31 e4 0f 1f 80 00 00 00 00 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 1a 54 0d 00 49 8b 07 48 89 44 24
RSP: 0018:ffffc9000abef688 EFLAGS: 00010246
RAX: 1ffff1100002b59b RBX: ffff88800015ac60 RCX: ffff888033df54c0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88800015ac60
RBP: ffff88809c458318 R08: dffffc0000000000 R09: ffffed101240aeee
R10: ffffed101240aeee R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa274b690 CR3: 00000000810b9000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 free_pgtables+0x7f/0x2d0 mm/memory.c:412
 exit_mmap+0x3fc/0x7a0 mm/mmap.c:3202
 __mmput+0x111/0x370 kernel/fork.c:1101
 exit_mm+0x60a/0x770 kernel/exit.c:501
 do_exit+0x6ae/0x2510 kernel/exit.c:812
 do_group_exit+0x168/0x2d0 kernel/exit.c:922
 get_signal+0x16b0/0x2080 kernel/signal.c:2808
 arch_do_signal_or_restart+0x8e/0x6d0 arch/x86/kernel/signal.c:865
 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:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:302
 do_syscall_64+0x4c/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
Code: Unable to access opcode bytes at RIP 0x4665bf.
RSP: 002b:00007efcf9801218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 000000000056bf88 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 00007ffc761f04ff R14: 00007efcf9801300 R15: 0000000000022000
Modules linked in:
---[ end trace 58dae142224be31f ]---
RIP: 0010:unlink_anon_vmas+0x67/0x600 mm/rmap.c:398
Code: 89 e7 e8 4c 54 0d 00 4d 8b 3c 24 4d 39 fc 4c 89 64 24 08 0f 84 cb 02 00 00 45 31 e4 0f 1f 80 00 00 00 00 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 1a 54 0d 00 49 8b 07 48 89 44 24
RSP: 0018:ffffc9000abef688 EFLAGS: 00010246
RAX: 1ffff1100002b59b RBX: ffff88800015ac60 RCX: ffff888033df54c0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88800015ac60
RBP: ffff88809c458318 R08: dffffc0000000000 R09: ffffed101240aeee
R10: ffffed101240aeee R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa274b690 CR3: 000000007bee6000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400