linux-kernel - Re: [syzbot] WARNING in diUnmount

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Date:   Mon, 05 Dec 2022 06:19:42 -0800
From:   syzbot <syzbot+47366a6b503c7edf6bbb@...kaller.appspotmail.com>
To:     jfs-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
        okanatov@...il.com, shaggy@...nel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] WARNING in diUnmount

syzbot has found a reproducer for the following issue on:

HEAD commit:    9e46a7996732 Add linux-next specific files for 20221125
git tree:       linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17e16583880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=11e19c740a0b2926
dashboard link: https://syzkaller.appspot.com/bug?extid=47366a6b503c7edf6bbb
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12170129880000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10d77d6b880000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/758d818cf966/disk-9e46a799.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f7c8696b40a5/vmlinux-9e46a799.xz
kernel image: https://storage.googleapis.com/syzbot-assets/810f9750b87f/bzImage-9e46a799.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/87349f941ac3/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+47366a6b503c7edf6bbb@...kaller.appspotmail.com

R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
jfs_mount_rw: diMount failed!
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5299 at mm/slab_common.c:923 mod_lruvec_page_state include/linux/vmstat.h:563 [inline]
WARNING: CPU: 1 PID: 5299 at mm/slab_common.c:923 free_large_kmalloc+0xad/0xe0 mm/slab_common.c:930
Modules linked in:
CPU: 1 PID: 5299 Comm: syz-executor293 Not tainted 6.1.0-rc6-next-20221125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:free_large_kmalloc+0xad/0xe0 mm/slab_common.c:923
Code: ee 48 89 ef 5d 41 5c 41 5d e9 cf bd 0d 00 e8 3a 22 d1 ff 44 89 e2 be 06 00 00 00 48 89 ef e8 2a fc 1f 00 e8 95 23 d1 ff eb c6 <0f> 0b 80 3d 06 a4 a6 0c 00 0f 84 e5 75 0b 08 48 8b 74 24 20 4c 89
RSP: 0018:ffffc90003dafbc8 EFLAGS: 00010246
RAX: 00fff00000000000 RBX: ffff8880765b2930 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88801d468000 RDI: ffffea0000751a00
RBP: ffffea0000751a00 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801d468000
R13: ffff88802009c200 R14: ffff8880765b0d70 R15: ffff8880765b2930
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559d632cbd28 CR3: 000000000c48e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 diUnmount+0xf1/0x130 fs/jfs/jfs_imap.c:195
 jfs_umount+0x189/0x410 fs/jfs/jfs_umount.c:63
 jfs_put_super+0x85/0x1a0 fs/jfs/super.c:194
 generic_shutdown_super+0x158/0x410 fs/super.c:492
 kill_block_super+0x9b/0xf0 fs/super.c:1428
 deactivate_locked_super+0x98/0x160 fs/super.c:332
 deactivate_super+0xb1/0xd0 fs/super.c:363
 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xaa8/0x28d0 kernel/exit.c:820
 do_group_exit+0xd4/0x2a0 kernel/exit.c:950
 __do_sys_exit_group kernel/exit.c:961 [inline]
 __se_sys_exit_group kernel/exit.c:959 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:959
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdcfc9f6ce9
Code: Unable to access opcode bytes at 0x7fdcfc9f6cbf.
RSP: 002b:00007ffe9b47d4c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fdcfca713f0 RCX: 00007fdcfc9f6ce9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007ffe9b47d6b8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdcfca713f0
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>