Message-ID: <0000000000003361de0618679a80@google.com>
Date: Tue, 14 May 2024 03:38:28 -0700
From: syzbot <syzbot+52eec578b7504cf32002@...kaller.appspotmail.com>
To: bfoster@...hat.com, kent.overstreet@...ux.dev, 
	linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] WARNING in bch2_printbuf_make_room

Hello,

syzbot found the following issue on:

HEAD commit:    cf87f46fd34d Merge tag 'drm-fixes-2024-05-11' of https://g..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=11e4d598980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7144b4fe7fbf5900
dashboard link: https://syzkaller.appspot.com/bug?extid=52eec578b7504cf32002
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=153d4878980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12813878980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f9ed1ac24b43/disk-cf87f46f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4934308925bc/vmlinux-cf87f46f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e19a148ec56c/bzImage-cf87f46f.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/6df3bd28499c/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+52eec578b7504cf32002@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5075 at mm/page_alloc.c:4551 __alloc_pages+0x1fce/0x2460 mm/page_alloc.c:4551
Modules linked in:
CPU: 1 PID: 5075 Comm: syz-executor362 Not tainted 6.9.0-rc7-syzkaller-00183-gcf87f46fd34d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__alloc_pages+0x1fce/0x2460 mm/page_alloc.c:4551
Code: ef e8 36 8e 0b 00 e9 ef f2 ff ff e8 2c 8e 0b 00 e9 1b f3 ff ff 4c 89 f7 e8 1f 8e 0b 00 e9 f6 f2 ff ff c6 05 44 6a cb 0d 01 90 <0f> 0b 90 e9 81 e4 ff ff 49 8d bc 24 40 09 00 00 48 b8 00 00 00 00
RSP: 0018:ffffc9000314eb68 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000800000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040cc0
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000040cc0
R13: 1ffff92000629d81 R14: 0000000000000cc0 R15: 00000000ffffffff
FS:  000055555685a380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e69851e000 CR3: 00000000662c8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 __kmalloc_large_node+0x7f/0x1a0 mm/slub.c:3917
 __do_kmalloc_node mm/slub.c:3960 [inline]
 __kmalloc_node_track_caller.cold+0x5/0x5f mm/slub.c:3992
 __do_krealloc mm/slab_common.c:1192 [inline]
 krealloc+0x5d/0x100 mm/slab_common.c:1225
 bch2_printbuf_make_room+0x195/0x2a0 fs/bcachefs/printbuf.c:38
 bch2_prt_printf+0x223/0x3d0 fs/bcachefs/printbuf.c:78
 journal_entry_btree_keys_to_text+0x11b/0x250 fs/bcachefs/journal_io.c:409
 bch2_journal_entry_to_text+0x119/0x170 fs/bcachefs/journal_io.c:835
 bch2_sb_clean_to_text+0x109/0x210 fs/bcachefs/sb-clean.c:316
 __bch2_sb_field_to_text+0x123/0x1e0 fs/bcachefs/super-io.c:1245
 bch2_sb_field_validate+0x248/0x2d0 fs/bcachefs/super-io.c:1228
 bch2_sb_validate.isra.0+0x6d8/0xce0 fs/bcachefs/super-io.c:468
 __bch2_read_super+0x93c/0x12a0 fs/bcachefs/super-io.c:822
 bch2_fs_open+0x3e5/0x1110 fs/bcachefs/super.c:2052
 bch2_mount+0xdcc/0x1130 fs/bcachefs/fs.c:1903
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1779
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x14e6/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __x64_sys_mount+0x297/0x320 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa562243dea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc4bfcc738 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc4bfcc750 RCX: 00007fa562243dea
RDX: 0000000020011a00 RSI: 00000000200000c0 RDI: 00007ffc4bfcc750
RBP: 0000000000000004 R08: 00007ffc4bfcc790 R09: 00000000000119fd
R10: 0000000001200014 R11: 0000000000000282 R12: 0000000001200014
R13: 00007ffc4bfcc790 R14: 0000000000000003 R15: 0000000001000000
 </TASK>


---
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