Re: [syzbot] [erofs?] WARNING: CPU: NUM PID: NUM at mm/page_alloc.c:LINE get_page_from_freeli

From: syzbot <syzbot+c3729cda01706a04fb98@syzkaller.appspotmail.com>
To: akpm@linux-foundation.org, chao@kernel.org,
	hsiangkao@linux.alibaba.com, linux-erofs@lists.ozlabs.org,
	linux-kernel@vger.kernel.org, nogikh@google.com,
	syzkaller-bugs@googlegroups.com, xiang@kernel.org
Subject: Re: [syzbot] [erofs?] WARNING: CPU: NUM PID: NUM at mm/page_alloc.c:LINE get_page_from_freeli
Date: Thu, 05 Jan 2023 06:33:16 -0800	[thread overview]
Message-ID: <0000000000007796bd05f1852ec2@google.com> (raw)
In-Reply-To: <CANp29Y63rCdepVtantxdJEcvbRv0D61gfY_oGV7dgrmEGgPdLw@mail.gmail.com>

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in get_page_from_freelist

------------[ cut here ]------------
WARNING: CPU: 1 PID: 4385 at mm/page_alloc.c:3829 rmqueue mm/page_alloc.c:3829 [inline]
WARNING: CPU: 1 PID: 4385 at mm/page_alloc.c:3829 get_page_from_freelist+0xbf3/0x2ce0 mm/page_alloc.c:4280
Modules linked in:
CPU: 1 PID: 4385 Comm: kworker/u5:1 Not tainted 6.2.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: erofs_unzipd z_erofs_decompressqueue_work
RIP: 0010:rmqueue mm/page_alloc.c:3829 [inline]
RIP: 0010:get_page_from_freelist+0xbf3/0x2ce0 mm/page_alloc.c:4280
Code: 48 c1 e8 03 42 80 3c 28 00 0f 85 18 1f 00 00 48 8b 03 f7 84 24 d8 00 00 00 00 80 00 00 48 89 44 24 68 74 08 41 83 fe 01 76 02 <0f> 0b 41 83 fe 09 0f 94 c2 41 83 fe 03 0f 96 c0 08 c2 88 54 24 50
RSP: 0018:ffffc900055e74d8 EFLAGS: 00010202
RAX: ffff88813fffae00 RBX: ffff88813fffc300 RCX: ffff88813fffabe8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffc900055e7718
RBP: 0000000000000002 R08: 0000000000002b49 R09: 0000000000078534
R10: 0000000000002b48 R11: 0000000000000000 R12: 0000000000002b48
R13: dffffc0000000000 R14: 0000000000000009 R15: ffff88813fffa700
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff496515829 CR3: 000000000c48e000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2286
 vm_area_alloc_pages mm/vmalloc.c:2989 [inline]
 __vmalloc_area_node mm/vmalloc.c:3057 [inline]
 __vmalloc_node_range+0x978/0x13c0 mm/vmalloc.c:3227
 kvmalloc_node+0x156/0x1a0 mm/util.c:606
 kvmalloc include/linux/slab.h:737 [inline]
 kvmalloc_array include/linux/slab.h:755 [inline]
 kvcalloc include/linux/slab.h:760 [inline]
 z_erofs_decompress_pcluster fs/erofs/zdata.c:1035 [inline]
 z_erofs_decompress_queue+0x6e2/0x3060 fs/erofs/zdata.c:1141
 z_erofs_decompressqueue_work+0x77/0xb0 fs/erofs/zdata.c:1153
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x669/0x1090 kernel/workqueue.c:2436
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Tested on:

commit:         88603b6d Linux 6.2-rc2
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=1193edc6480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=46221e8203c7aca6
dashboard link: https://syzkaller.appspot.com/bug?extid=c3729cda01706a04fb98
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Note: no patches were applied.