Message-ID: <000000000000a14f020604a62a98@google.com>
Date:   Tue, 05 Sep 2023 17:53:06 -0700
From:   syzbot <syzbot+ebd7072191e2eddd7d6e@...kaller.appspotmail.com>
To:     chao@...nel.org, jaegeuk@...nel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, terrelln@...com
Subject: [syzbot] [f2fs?] kernel BUG in f2fs_put_super

Hello,

syzbot found the following issue on:

HEAD commit:    e0152e7481c6 Merge tag 'riscv-for-linus-6.6-mw1' of git://..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11072fdfa80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=30b036635ccf91ce
dashboard link: https://syzkaller.appspot.com/bug?extid=ebd7072191e2eddd7d6e
compiler:       gcc (Debian 12.2.0-14) 12.2.0, 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/7bc7510fe41f/non_bootable_disk-e0152e74.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8159e43fa183/vmlinux-e0152e74.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b0ced23e91f7/bzImage-e0152e74.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ebd7072191e2eddd7d6e@...kaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/f2fs/super.c:1639!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 15451 Comm: syz-executor.1 Not tainted 6.5.0-syzkaller-09338-ge0152e7481c6 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:f2fs_put_super+0xce1/0xed0 fs/f2fs/super.c:1639
Code: 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 27 48 63 0b 89 ea 48 c7 c6 40 f9 ba 8a 4c 89 e7 e8 ff 77 ff ff <0f> 0b 4c 89 ee 48 c7 c7 c0 d2 18 8d e8 5e bd a1 00 eb a6 48 89 df
RSP: 0018:ffffc9000420fc00 EFLAGS: 00010282

RAX: 0000000000000000 RBX: ffff888058dd4f80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816a3a30 RDI: 0000000000000005
RBP: 000000000000000a R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 2073662d53463246 R12: ffff888058dd4000
R13: 000000000000000a R14: dffffc0000000000 R15: 0000000000000001
FS:  00007fbbc86656c0(0000) GS:ffff88806b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f621a85f000 CR3: 0000000111785000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 generic_shutdown_super+0x161/0x3c0 fs/super.c:693
 kill_block_super+0x3b/0x70 fs/super.c:1646
 kill_f2fs_super+0x2b7/0x3d0 fs/f2fs/super.c:4879
 deactivate_locked_super+0x9a/0x170 fs/super.c:481
 deactivate_super+0xde/0x100 fs/super.c:514
 cleanup_mnt+0x222/0x3d0 fs/namespace.c:1254
 task_work_run+0x14d/0x240 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fbbc787e1ea
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:00007fbbc8664ee8 EFLAGS: 00000202
 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffec RBX: 00007fbbc8664f80 RCX: 00007fbbc787e1ea
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fbbc8664f40
RBP: 0000000020000040 R08: 00007fbbc8664f80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000080
R13: 00007fbbc8664f40 R14: 00000000000054f4 R15: 0000000020000540
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_put_super+0xce1/0xed0 fs/f2fs/super.c:1639
Code: 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 27 48 63 0b 89 ea 48 c7 c6 40 f9 ba 8a 4c 89 e7 e8 ff 77 ff ff <0f> 0b 4c 89 ee 48 c7 c7 c0 d2 18 8d e8 5e bd a1 00 eb a6 48 89 df
RSP: 0018:ffffc9000420fc00 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888058dd4f80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816a3a30 RDI: 0000000000000005
RBP: 000000000000000a R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 2073662d53463246 R12: ffff888058dd4000
R13: 000000000000000a R14: dffffc0000000000 R15: 0000000000000001
FS:  00007fbbc86656c0(0000) GS:ffff88806b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb061dfa8 CR3: 0000000111785000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
This report is generated by a bot. It may contain errors.
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If the bug is already fixed, let syzbot know by replying with:
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#syz dup: exact-subject-of-another-report

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