kernel BUG at include/linux/mm.h:LINE! (6)

kernel BUG at include/linux/mm.h:LINE! (6)
Status: upstream: reported C repro on 2020/04/19 15:28
Reported-by: syzbot+a923008018a2d298247b@syzkaller.appspotmail.com
First crash: 188d, last: 23d

Cause bisection: failed (bisect log)

similar bugs (7):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	kernel BUG at include/linux/mm.h:LINE! (3)	C		14	602d	602d	0/17	closed as invalid on 2019/02/27 20:54
linux-4.19	kernel BUG at include/linux/mm.h:LINE!	C		23	9d19h	552d	0/1	upstream: reported C repro on 2019/04/17 12:33
upstream	kernel BUG at include/linux/mm.h:LINE!	syz		68	867d	904d	6/17	fixed on 2018/06/07 13:52
upstream	kernel BUG at include/linux/mm.h:LINE! (2)	C		1009	602d	865d	12/17	fixed on 2019/02/26 22:09
upstream	kernel BUG at include/linux/mm.h:LINE! (5)	C	cause+fix	129	526d	596d	16/17	fixed on 2020/01/08 01:07
linux-4.14	kernel BUG at include/linux/mm.h:LINE!			1	315d	315d	0/1	auto-closed as invalid on 2020/04/08 20:20
upstream	kernel BUG at include/linux/mm.h:LINE! (4)			2	600d	599d	0/17	closed as invalid on 2019/03/02 20:05

Sample crash report:

raw: 0000000000000000 ffff8880975743c0 00000001ffffffff 0000000000000000
page dumped because: VM_BUG_ON_PAGE(page->pmd_huge_pte)
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:2260!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7074 Comm: syz-executor496 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pgtable_pmd_page_dtor include/linux/mm.h:2260 [inline]
RIP: 0010:pgtable_pmd_page_dtor include/linux/mm.h:2257 [inline]
RIP: 0010:___pmd_free_tlb+0x108/0x140 arch/x86/mm/pgtable.c:72
Code: ee e8 5c 8e fe ff 66 90 5b 5d 41 5c 41 5d c3 e8 2e 96 40 00 0f 0b e8 27 96 40 00 48 c7 c6 80 20 89 88 48 89 ef e8 f8 90 6f 00 <0f> 0b e8 11 96 40 00 0f 0b 48 c7 c7 a8 6c fc 89 e8 33 6d 81 00 e9
RSP: 0018:ffffc900063978f0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 00000000000a104c RCX: ffffffff81a54985
RDX: ffff88809270e240 RSI: ffffffff81a549d4 RDI: ffffea0002841338
RBP: ffffea0002841300 R08: 0000000000000037 R09: ffff8880ae5318e7
R10: ffffffffffffffff R11: 0000000000000000 R12: ffffc90006397a50
R13: ffff8880a104c000 R14: 0000000021000fff R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcd5618fb0 CR3: 00000000a3cfc000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __pmd_free_tlb arch/x86/include/asm/pgalloc.h:95 [inline]
 free_pmd_range mm/memory.c:255 [inline]
 free_pud_range mm/memory.c:273 [inline]
 free_p4d_range mm/memory.c:307 [inline]
 free_pgd_range+0xa3f/0xf90 mm/memory.c:387
 free_pgtables+0x230/0x2f0 mm/memory.c:419
 exit_mmap+0x2c0/0x530 mm/mmap.c:3184
 __mmput+0x122/0x470 kernel/fork.c:1077
 mmput+0x53/0x60 kernel/fork.c:1098
 exit_mm kernel/exit.c:483 [inline]
 do_exit+0xa8b/0x29f0 kernel/exit.c:793
 do_group_exit+0x125/0x310 kernel/exit.c:903
 get_signal+0x428/0x1f00 kernel/signal.c:2757
 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
 exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:192
 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:267
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x446949
Code: Bad RIP value.
RSP: 002b:00007fabb6137db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 0000000000446949
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007ffcd5618f2f R14: 00007fabb61389c0 R15: 000000000000002d
Modules linked in:
---[ end trace 65e5d920bc4c5fa2 ]---
RIP: 0010:pgtable_pmd_page_dtor include/linux/mm.h:2260 [inline]
RIP: 0010:pgtable_pmd_page_dtor include/linux/mm.h:2257 [inline]
RIP: 0010:___pmd_free_tlb+0x108/0x140 arch/x86/mm/pgtable.c:72
Code: ee e8 5c 8e fe ff 66 90 5b 5d 41 5c 41 5d c3 e8 2e 96 40 00 0f 0b e8 27 96 40 00 48 c7 c6 80 20 89 88 48 89 ef e8 f8 90 6f 00 <0f> 0b e8 11 96 40 00 0f 0b 48 c7 c7 a8 6c fc 89 e8 33 6d 81 00 e9
RSP: 0018:ffffc900063978f0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 00000000000a104c RCX: ffffffff81a54985
RDX: ffff88809270e240 RSI: ffffffff81a549d4 RDI: ffffea0002841338
RBP: ffffea0002841300 R08: 0000000000000037 R09: ffff8880ae5318e7
R10: ffffffffffffffff R11: 0000000000000000 R12: ffffc90006397a50
R13: ffff8880a104c000 R14: 0000000021000fff R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fabb6137db8 CR3: 00000000830bd000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (6):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kasan-gce	2020/09/28 07:38	upstream	16bc1d54	5dd8aee8	.config	log	report	syz	C	bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-386	2020/09/28 07:28	upstream	16bc1d54	5dd8aee8	.config	log	report	syz	C	bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-386	2020/09/26 03:20	upstream	171d4ff7	4a006f63	.config	log	report	syz	C	bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-selinux-root	2020/07/02 18:18	upstream	cd77006e	bed10395	.config	log	report			bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-root	2020/05/31 08:14	upstream	ffeb595d	6f3e1c7c	.config	log	report			akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce	2020/04/15 15:13	upstream	8632e9b5	3f3c5574	.config	log	report			akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org