Message-ID: <67a6dd2c.050a0220.110943.0008.GAE@google.com>
Date: Fri, 07 Feb 2025 20:27:24 -0800
From: syzbot <syzbot+92895fc54ccb69ca6fa9@...kaller.appspotmail.com>
To: chao@...nel.org, jaegeuk@...nel.org, 
	linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [f2fs?] kernel BUG in folio_end_read

Hello,

syzbot found the following issue on:

HEAD commit:    0de63bb7d919 Merge tag 'pull-fix' of git://git.kernel.org/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1699f5f8580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1909f2f0d8e641ce
dashboard link: https://syzkaller.appspot.com/bug?extid=92895fc54ccb69ca6fa9
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-0de63bb7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1142009a30a7/vmlinux-0de63bb7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5d9e46a8998d/bzImage-0de63bb7.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+92895fc54ccb69ca6fa9@...kaller.appspotmail.com

page: refcount:2 mapcount:0 mapping:ffff8880455a0220 index:0x3807 pfn:0x5806b
memcg:ffff888036be0000
aops:f2fs_meta_aops ino:2
flags: 0x4fff400000000a9(locked|waiters|uptodate|lru|node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff400000000a9 ffffea0001184188 ffff88804368b240 ffff8880455a0220
raw: 0000000000003807 0000000000000000 00000002ffffffff ffff888036be0000
page dumped because: VM_BUG_ON_FOLIO(success && folio_test_uptodate(folio))
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x40c40(GFP_NOFS|__GFP_COMP), pid 5320, tgid 5319 (syz.0.0), ts 62351716889, free_ts 62334302156
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline]
 alloc_pages_noprof+0x121/0x190 mm/mempolicy.c:2361
 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2371
 filemap_alloc_folio_noprof+0xe1/0x540 mm/filemap.c:1019
 __filemap_get_folio+0x438/0xae0 mm/filemap.c:1970
 pagecache_get_page+0x2c/0x130 mm/folio-compat.c:87
 f2fs_pagecache_get_page fs/f2fs/f2fs.h:2804 [inline]
 ra_data_block+0x674/0xb40 fs/f2fs/gc.c:1263
 gc_data_segment fs/f2fs/gc.c:1627 [inline]
 do_garbage_collect+0x3b55/0x80e0 fs/f2fs/gc.c:1825
 f2fs_gc+0xf3a/0x2f60 fs/f2fs/gc.c:1929
 f2fs_balance_fs+0x5f1/0x810 fs/f2fs/segment.c:456
 f2fs_write_single_data_page+0x12ed/0x1bd0 fs/f2fs/data.c:2896
 f2fs_write_cache_pages fs/f2fs/data.c:3154 [inline]
 __f2fs_write_data_pages fs/f2fs/data.c:3309 [inline]
 f2fs_write_data_pages+0x1e03/0x3670 fs/f2fs/data.c:3336
 do_writepages+0x35f/0x880 mm/page-writeback.c:2687
page last free pid 1037 tgid 1037 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
 fscrypt_finalize_bounce_page include/linux/fscrypt.h:1119 [inline]
 f2fs_write_end_io+0x3cd/0x9a0 fs/f2fs/data.c:335
 blk_update_request+0x5e5/0x1160 block/blk-mq.c:983
 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1145
 loop_handle_cmd drivers/block/loop.c:1946 [inline]
 loop_process_work+0x1bc8/0x21c0 drivers/block/loop.c:1964
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
------------[ cut here ]------------
kernel BUG at mm/filemap.c:1526!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 27 Comm: kworker/u4:2 Not tainted 6.14.0-rc1-syzkaller-00020-g0de63bb7d919 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: loop0 loop_workfn
RIP: 0010:folio_end_read+0x239/0x240 mm/filemap.c:1526
Code: 4f c7 ff 4c 89 ef 48 c7 c6 e0 d3 13 8c e8 6f 64 11 00 90 0f 0b e8 c7 4f c7 ff 4c 89 ef 48 c7 c6 20 cc 13 8c e8 58 64 11 00 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900004e73e8 EFLAGS: 00010246
RAX: df44434cf2d67900 RBX: 0000000000000008 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c0aa680 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff942f9947 R09: 1ffffffff285f328
R10: dffffc0000000000 R11: fffffbfff285f329 R12: ffffea0001601ac8
R13: ffffea0001601ac0 R14: 1ffffd40002c0359 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f716e9b0fe0 CR3: 0000000011832000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_finish_read_bio+0x3bb/0x850 fs/f2fs/data.c:154
 blk_update_request+0x5e5/0x1160 block/blk-mq.c:983
 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1145
 loop_handle_cmd drivers/block/loop.c:1946 [inline]
 loop_process_work+0x1bc8/0x21c0 drivers/block/loop.c:1964
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_end_read+0x239/0x240 mm/filemap.c:1526
Code: 4f c7 ff 4c 89 ef 48 c7 c6 e0 d3 13 8c e8 6f 64 11 00 90 0f 0b e8 c7 4f c7 ff 4c 89 ef 48 c7 c6 20 cc 13 8c e8 58 64 11 00 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900004e73e8 EFLAGS: 00010246
RAX: df44434cf2d67900 RBX: 0000000000000008 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c0aa680 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff942f9947 R09: 1ffffffff285f328
R10: dffffc0000000000 R11: fffffbfff285f329 R12: ffffea0001601ac8
R13: ffffea0001601ac0 R14: 1ffffd40002c0359 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f716e9b0fe0 CR3: 0000000043542000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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