linux-kernel - [syzbot] [ext4?] WARNING in ext4_xattr_block

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Message-ID: <00000000000006a0df05f6667499@google.com>
Date:   Wed, 08 Mar 2023 08:59:37 -0800
From:   syzbot <syzbot+6385d7d3065524c5ca6d@...kaller.appspotmail.com>
To:     adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: [syzbot] [ext4?] WARNING in ext4_xattr_block_set (2)

Hello,

syzbot found the following issue on:

HEAD commit:    0988a0ea7919 Merge tag 'for-v6.3-part2' of git://git.kerne..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17319698c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f763d89e26d3d4c4
dashboard link: https://syzkaller.appspot.com/bug?extid=6385d7d3065524c5ca6d
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=120ab7acc80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17459908c80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e0aa29e9ae74/disk-0988a0ea.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6f64db0b58ef/vmlinux-0988a0ea.xz
kernel image: https://storage.googleapis.com/syzbot-assets/db391408e15d/bzImage-0988a0ea.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/40fdb4293020/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6385d7d3065524c5ca6d@...kaller.appspotmail.com

WARNING: CPU: 0 PID: 5338 at fs/ext4/xattr.c:2141 ext4_xattr_block_set+0x2ef2/0x3680
Modules linked in:
CPU: 0 PID: 5338 Comm: syz-executor395 Not tainted 6.2.0-syzkaller-13467-g0988a0ea7919 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:ext4_xattr_block_set+0x2ef2/0x3680 fs/ext4/xattr.c:2141
Code: b3 3d ff 48 8b 7c 24 50 4c 89 ee e8 88 2f c1 ff 45 31 ed e9 86 f4 ff ff e8 1b b3 3d ff 45 31 ed e9 79 f4 ff ff e8 0e b3 3d ff <0f> 0b e9 5d f2 ff ff e8 02 b3 3d ff 0f 0b 43 80 3c 26 00 0f 85 6f
RSP: 0018:ffffc90004a0f4a0 EFLAGS: 00010293
RAX: ffffffff824f0a52 RBX: 1ffff92000941f11 RCX: ffff888029c61d40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc90004a0f6d0 R08: ffffffff8213bec0 R09: ffffed100e12d2ae
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90004a0f860
FS:  00007f3928dee700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3920a0d000 CR3: 000000001c94d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_xattr_set_handle+0xcd4/0x15c0 fs/ext4/xattr.c:2458
 ext4_initxattrs+0xa3/0x110 fs/ext4/xattr_security.c:44
 security_inode_init_security+0x2df/0x3f0 security/security.c:1147
 __ext4_new_inode+0x347e/0x43d0 fs/ext4/ialloc.c:1324
 ext4_mkdir+0x425/0xce0 fs/ext4/namei.c:2992
 vfs_mkdir+0x29d/0x450 fs/namei.c:4038
 do_mkdirat+0x264/0x520 fs/namei.c:4061
 __do_sys_mkdirat fs/namei.c:4076 [inline]
 __se_sys_mkdirat fs/namei.c:4074 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4074
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3928e426d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f3928dee2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f3928ec77a0 RCX: 00007f3928e426d9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000005
RBP: 00007f3928e94590 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3928e940c0
R13: 3d6469677365722c R14: 0030656c69662f2e R15: 00007f3928ec77a8
 </TASK>


---
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