Message-ID: <000000000000dbda9806203851ba@google.com>
Date: Wed, 21 Aug 2024 14:35:23 -0700
From: syzbot <syzbot+c0360e8367d6d8d04a66@...kaller.appspotmail.com>
To: brauner@...nel.org, jack@...e.cz, jfs-discussion@...ts.sourceforge.net, 
	kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	shaggy@...nel.org, syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: [syzbot] [bcachefs?] [jfs?] kernel BUG in vfs_get_tree

Hello,

syzbot found the following issue on:

HEAD commit:    b311c1b497e5 Merge tag '6.11-rc4-server-fixes' of git://gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17dfa42b980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=df2f0ed7e30a639d
dashboard link: https://syzkaller.appspot.com/bug?extid=c0360e8367d6d8d04a66
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16210a7b980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-b311c1b4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1c99fa48192f/vmlinux-b311c1b4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/16d5710a012a/bzImage-b311c1b4.xz
mounted in repro #1: https://storage.googleapis.com/syzbot-assets/bcc0f964f07d/mount_0.gz
mounted in repro #2: https://storage.googleapis.com/syzbot-assets/8d5780313c65/mount_1.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c0360e8367d6d8d04a66@...kaller.appspotmail.com

bcachefs: bch2_fs_get_tree() error: EPERM
Filesystem bcachefs get_tree() didn't set fc->root
------------[ cut here ]------------
kernel BUG at fs/super.c:1810!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5368 Comm: syz.0.15 Not tainted 6.11.0-rc4-syzkaller-00019-gb311c1b497e5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:vfs_get_tree+0x29c/0x2a0 fs/super.c:1810
Code: ff 49 8b 1f 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 74 95 ee ff 48 8b 33 48 c7 c7 60 93 18 8c e8 b5 82 a7 09 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0018:ffffc90002c0fd08 EFLAGS: 00010246
RAX: 0000000000000032 RBX: ffffffff8ef44540 RCX: 3e1a74824a3f5500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffff11007074696 R08: ffffffff8174034c R09: 1ffff1100410519a
R10: dffffc0000000000 R11: ffffed100410519b R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8880383a34b0 R15: ffff8880383a3498
FS:  00007fea882896c0(0000) GS:ffff888020800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7345eec538 CR3: 0000000037c0e000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_new_mount+0x2be/0xb40 fs/namespace.c:3472
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea8757b61a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fea88288e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fea88288ef0 RCX: 00007fea8757b61a
RDX: 000000002000fec0 RSI: 000000002000ff00 RDI: 00007fea88288eb0
RBP: 000000002000fec0 R08: 00007fea88288ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000002000ff00
R13: 00007fea88288eb0 R14: 000000000000fe88 R15: 0000000020000040
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vfs_get_tree+0x29c/0x2a0 fs/super.c:1810
Code: ff 49 8b 1f 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 74 95 ee ff 48 8b 33 48 c7 c7 60 93 18 8c e8 b5 82 a7 09 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0018:ffffc90002c0fd08 EFLAGS: 00010246
RAX: 0000000000000032 RBX: ffffffff8ef44540 RCX: 3e1a74824a3f5500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffff11007074696 R08: ffffffff8174034c R09: 1ffff1100410519a
R10: dffffc0000000000 R11: ffffed100410519b R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8880383a34b0 R15: ffff8880383a3498
FS:  00007fea882896c0(0000) GS:ffff888020800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efe67e50469 CR3: 0000000037c0e000 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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