Message-ID: <00000000000074a35e06095c6558@google.com>
Date:   Sat, 04 Nov 2023 16:58:23 -0700
From:   syzbot <syzbot+42e831f5d4d8616b0e8f@...kaller.appspotmail.com>
To:     clm@...com, dsterba@...e.com, josef@...icpanda.com,
        linux-btrfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] kernel BUG in btrfs_try_granting_tickets

Hello,

syzbot found the following issue on:

HEAD commit:    5a6a09e97199 Merge tag 'cgroup-for-6.7' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=132ed3e3680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=414f578e7f8d77a7
dashboard link: https://syzkaller.appspot.com/bug?extid=42e831f5d4d8616b0e8f
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: https://storage.googleapis.com/syzbot-assets/bd30039dd1a9/disk-5a6a09e9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7dac0c0db854/vmlinux-5a6a09e9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4d1318c50c57/bzImage-5a6a09e9.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+42e831f5d4d8616b0e8f@...kaller.appspotmail.com

assertion failed: space_info->reclaim_size >= ticket->bytes, in fs/btrfs/space-info.c:436
------------[ cut here ]------------
kernel BUG at fs/btrfs/space-info.c:436!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 25603 Comm: syz-executor.2 Not tainted 6.6.0-syzkaller-03860-g5a6a09e97199 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:remove_ticket fs/btrfs/space-info.c:436 [inline]
RIP: 0010:btrfs_try_granting_tickets+0x59f/0x5d0 fs/btrfs/space-info.c:468
Code: fe e9 ca fa ff ff e8 a0 ca d8 fd 48 c7 c7 e0 16 8d 8b 48 c7 c6 a0 1d 8d 8b 48 c7 c2 60 17 8d 8b b9 b4 01 00 00 e8 11 02 54 07 <0f> 0b e8 7a ca d8 fd 48 c7 c7 e0 16 8d 8b 48 c7 c6 40 17 8d 8b 48
RSP: 0018:ffffc90015f07188 EFLAGS: 00010246
RAX: 0000000000000059 RBX: ffffffffffff2000 RCX: 7562ac8ccb7a8d00
RDX: ffffc9000bd65000 RSI: 000000000000a0ff RDI: 000000000000a100
RBP: 0000000000060000 R08: ffffffff81716b8c R09: 1ffff92002be0dd0
R10: dffffc0000000000 R11: fffff52002be0dd1 R12: ffff8880293b90f0
R13: ffffc9000ac0f6e0 R14: dffffc0000000000 R15: 1ffff1100527721e
FS:  00007fca38d826c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f27f6881000 CR3: 00000000365f7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_space_info_free_bytes_may_use fs/btrfs/space-info.h:232 [inline]
 block_rsv_release_bytes fs/btrfs/block-rsv.c:154 [inline]
 btrfs_block_rsv_release+0x506/0x5f0 fs/btrfs/block-rsv.c:295
 btrfs_delayed_refs_rsv_release+0x9f/0x110 fs/btrfs/delayed-ref.c:75
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:2038 [inline]
 __btrfs_run_delayed_refs+0x1e34/0x4810 fs/btrfs/extent-tree.c:2106
 btrfs_run_delayed_refs+0xe3/0x2c0 fs/btrfs/extent-tree.c:2218
 btrfs_commit_transaction+0x4ba/0x3730 fs/btrfs/transaction.c:2237
 sync_filesystem+0x1c0/0x220 fs/sync.c:66
 btrfs_remount+0x231/0x14b0 fs/btrfs/super.c:1649
 reconfigure_super+0x440/0x870 fs/super.c:1140
 do_remount fs/namespace.c:2884 [inline]
 path_mount+0xc24/0xfa0 fs/namespace.c:3656
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fca3807e1ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fca38d81ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fca38d81f80 RCX: 00007fca3807e1ea
RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 0000000020000180 R08: 00007fca38d81f80 R09: 00000000039600ac
R10: 00000000039600ac R11: 0000000000000202 R12: 0000000020000140
R13: 00007fca38d81f40 R14: 0000000000000000 R15: 0000000020000080
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:remove_ticket fs/btrfs/space-info.c:436 [inline]
RIP: 0010:btrfs_try_granting_tickets+0x59f/0x5d0 fs/btrfs/space-info.c:468
Code: fe e9 ca fa ff ff e8 a0 ca d8 fd 48 c7 c7 e0 16 8d 8b 48 c7 c6 a0 1d 8d 8b 48 c7 c2 60 17 8d 8b b9 b4 01 00 00 e8 11 02 54 07 <0f> 0b e8 7a ca d8 fd 48 c7 c7 e0 16 8d 8b 48 c7 c6 40 17 8d 8b 48
RSP: 0018:ffffc90015f07188 EFLAGS: 00010246
RAX: 0000000000000059 RBX: ffffffffffff2000 RCX: 7562ac8ccb7a8d00
RDX: ffffc9000bd65000 RSI: 000000000000a0ff RDI: 000000000000a100
RBP: 0000000000060000 R08: ffffffff81716b8c R09: 1ffff92002be0dd0
R10: dffffc0000000000 R11: fffff52002be0dd1 R12: ffff8880293b90f0
R13: ffffc9000ac0f6e0 R14: dffffc0000000000 R15: 1ffff1100527721e
FS:  00007fca38d826c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f27f6881000 CR3: 00000000365f7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

Powered by blists - more mailing lists