linux-kernel - [syzbot] [gfs2?] memory leak in gfs2_quota

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Message-ID: <0000000000006dca4d05ffc82098@google.com>
Date:   Wed, 05 Jul 2023 19:18:06 -0700
From:   syzbot <syzbot+4ee56df41d0cc0f0783a@...kaller.appspotmail.com>
To:     agruenba@...hat.com, cluster-devel@...hat.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        rpeterso@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [gfs2?] memory leak in gfs2_quota_init

Hello,

syzbot found the following issue on:

HEAD commit:    f8566aa4f176 Merge tag 'x86-urgent-2023-07-01' of git://gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10443370a80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=87bd445ea3f7a661
dashboard link: https://syzkaller.appspot.com/bug?extid=4ee56df41d0cc0f0783a
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=172d3d14a80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=143b6648a80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9c2c2ab2bd05/disk-f8566aa4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0af022babece/vmlinux-f8566aa4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e335287813f6/bzImage-f8566aa4.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/2f0686bcdcb4/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4ee56df41d0cc0f0783a@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff88810aa24000 (size 8192):
  comm "syz-executor334", pid 5004, jiffies 4294954804 (age 12.830s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8154c55a>] __do_kmalloc_node mm/slab_common.c:984 [inline]
    [<ffffffff8154c55a>] __kmalloc+0x4a/0x120 mm/slab_common.c:998
    [<ffffffff821964d9>] kmalloc include/linux/slab.h:583 [inline]
    [<ffffffff821964d9>] kzalloc include/linux/slab.h:700 [inline]
    [<ffffffff821964d9>] gfs2_quota_init+0xd9/0x770 fs/gfs2/quota.c:1373
    [<ffffffff821a1aef>] gfs2_make_fs_rw+0x11f/0x200 fs/gfs2/super.c:155
    [<ffffffff8218a1cf>] gfs2_reconfigure+0x3cf/0x530 fs/gfs2/ops_fstype.c:1602
    [<ffffffff81665d5c>] reconfigure_super+0x14c/0x3e0 fs/super.c:961
    [<ffffffff816cd5cb>] vfs_fsconfig_locked fs/fsopen.c:254 [inline]
    [<ffffffff816cd5cb>] __do_sys_fsconfig+0x80b/0x8d0 fs/fsopen.c:439
    [<ffffffff84a6bff9>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a6bff9>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff88810f360000 (size 8192):
  comm "syz-executor334", pid 5007, jiffies 4294955349 (age 7.380s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8154c55a>] __do_kmalloc_node mm/slab_common.c:984 [inline]
    [<ffffffff8154c55a>] __kmalloc+0x4a/0x120 mm/slab_common.c:998
    [<ffffffff821964d9>] kmalloc include/linux/slab.h:583 [inline]
    [<ffffffff821964d9>] kzalloc include/linux/slab.h:700 [inline]
    [<ffffffff821964d9>] gfs2_quota_init+0xd9/0x770 fs/gfs2/quota.c:1373
    [<ffffffff821a1aef>] gfs2_make_fs_rw+0x11f/0x200 fs/gfs2/super.c:155
    [<ffffffff8218a1cf>] gfs2_reconfigure+0x3cf/0x530 fs/gfs2/ops_fstype.c:1602
    [<ffffffff81665d5c>] reconfigure_super+0x14c/0x3e0 fs/super.c:961
    [<ffffffff816cd5cb>] vfs_fsconfig_locked fs/fsopen.c:254 [inline]
    [<ffffffff816cd5cb>] __do_sys_fsconfig+0x80b/0x8d0 fs/fsopen.c:439
    [<ffffffff84a6bff9>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a6bff9>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd



---
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