general protection fault in unlink_anon

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	general protection fault in unlink_anon_vmas mm	4	1525d	1578d	0/28	auto-closed as invalid on 2020/12/19 02:16
upstream	general protection fault in unlink_anon_vmas (2) mm	6	1098d	1190d	0/28	auto-closed as invalid on 2022/03/21 03:47
linux-4.19	general protection fault in unlink_anon_vmas	1	1326d	1326d	0/1	auto-closed as invalid on 2021/08/05 10:09

kasan: GPF could be caused by NULL-ptr deref or user memory access kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 17214 Comm: syz-executor.5 Not tainted 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888000052280 task.stack: ffff888000058000 RIP: 0010:unlink_anon_vmas+0x63/0x7e0 mm/rmap.c:385 RSP: 0018:ffff88800005f8f8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff88800010bd68 RBP: fffffffffffffff0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 00007f25a8199000 R14: 00007f25a8177000 R15: 0000000000000000 FS: 00007f25a8197700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000014a53ad CR3: 000000009e276000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: free_pgtables+0x178/0x2b0 mm/memory.c:655 exit_mmap+0x27f/0x4d0 mm/mmap.c:3059 __mmput kernel/fork.c:930 [inline] mmput kernel/fork.c:951 [inline] mmput+0xfa/0x420 kernel/fork.c:946 exit_mm kernel/exit.c:548 [inline] do_exit+0x984/0x2850 kernel/exit.c:855 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2423 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007f25a8197218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000056bf68 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf68 RBP: 000000000056bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf6c R13: 00007ffc37d840bf R14: 00007f25a8197300 R15: 0000000000022000 Code: 80 3c 02 00 0f 85 f9 06 00 00 48 8b 44 24 10 48 8b 58 78 48 b8 00 00 00 00 00 fc ff df 48 8d 6b f0 48 89 da 49 89 df 48 c1 ea 03 <80> 3c 02 00 0f 85 c1 06 00 00 48 8b 03 48 39 5c 24 08 4c 8d 68 RIP: unlink_anon_vmas+0x63/0x7e0 mm/rmap.c:385 RSP: ffff88800005f8f8 ---[ end trace b0a63bafc07f4757 ]---