linux-kernel - [syzbot] [mm?] WARNING: refcount bug in __reset_page

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Message-ID: <000000000000015b940614004701@google.com>
Date: Tue, 19 Mar 2024 02:41:24 -0700
From: syzbot <syzbot+98c1a1753a0731df2dd4@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [mm?] WARNING: refcount bug in __reset_page_owner

Hello,

syzbot found the following issue on:

HEAD commit:    741e9d668aa5 Merge tag 'scsi-misc' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=112d3bb9180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1c6662240382da2
dashboard link: https://syzkaller.appspot.com/bug?extid=98c1a1753a0731df2dd4
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17d6ee31180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1338fc6e180000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-741e9d66.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1d3f3486333c/vmlinux-741e9d66.xz
kernel image: https://storage.googleapis.com/syzbot-assets/41a39292f22a/bzImage-741e9d66.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+98c1a1753a0731df2dd4@...kaller.appspotmail.com

------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 0 PID: 42 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31
Modules linked in:
CPU: 0 PID: 42 Comm: kcompactd0 Not tainted 6.8.0-syzkaller-11339-g741e9d668aa5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31
Code: 8b e8 17 19 d5 fc 90 0f 0b 90 90 e9 c3 fe ff ff e8 e8 7b 12 fd c6 05 a1 c1 0e 0b 01 90 48 c7 c7 80 75 6e 8b e8 f4 18 d5 fc 90 <0f> 0b 90 90 e9 a0 fe ff ff 48 89 ef e8 42 64 6d fd e9 44 fe ff ff
RSP: 0018:ffffc900009a7350 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814fc049
RDX: ffff8880186e2440 RSI: ffffffff814fc056 RDI: 0000000000000001
RBP: ffff8881064ad33c R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881064ad33c
R13: 0000000000000000 R14: 00000000026401ed R15: ffff888016a2c278
FS:  0000000000000000(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556f261ca8 CR3: 000000000d57a000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_dec include/linux/refcount.h:336 [inline]
 refcount_dec include/linux/refcount.h:351 [inline]
 dec_stack_record_count mm/page_owner.c:215 [inline]
 __reset_page_owner+0x2ea/0x370 mm/page_owner.c:253
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1141 [inline]
 free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347
 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
 __folio_put_small mm/swap.c:119 [inline]
 __folio_put+0x166/0x1f0 mm/swap.c:142
 folio_put include/linux/mm.h:1506 [inline]
 migrate_folio_done+0x27a/0x320 mm/migrate.c:1106
 migrate_folio_move mm/migrate.c:1329 [inline]
 migrate_pages_batch+0x18a4/0x2c60 mm/migrate.c:1778
 migrate_pages_sync mm/migrate.c:1844 [inline]
 migrate_pages+0x1b9f/0x2840 mm/migrate.c:1953
 compact_zone+0x1f68/0x41c0 mm/compaction.c:2659
 compact_node+0x1a2/0x2d0 mm/compaction.c:2923
 kcompactd+0x73c/0xdb0 mm/compaction.c:3221
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>


---
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