linux-kernel - [syzbot] [mtd?] WARNING in release_mtd

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Message-ID: <679cd60e.050a0220.d7c5a.0045.GAE@google.com>
Date: Fri, 31 Jan 2025 05:54:22 -0800
From: syzbot <syzbot+074732af3fc6c528f8a0@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org, 
	miquel.raynal@...tlin.com, richard@....at, syzkaller-bugs@...glegroups.com, 
	vigneshr@...com
Subject: [syzbot] [mtd?] WARNING in release_mtd_partition

Hello,

syzbot found the following issue on:

HEAD commit:    2a9f04bde07a Merge tag 'rtc-6.14' of git://git.kernel.org/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11fe5ddf980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=98d83cc1742b7377
dashboard link: https://syzkaller.appspot.com/bug?extid=074732af3fc6c528f8a0
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14590b24580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15fe5ddf980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/89ef40be688f/disk-2a9f04bd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7471856a382f/vmlinux-2a9f04bd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d694ab107faf/bzImage-2a9f04bd.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+074732af3fc6c528f8a0@...kaller.appspotmail.com

RDX: 0000000000000008 RSI: 0000000000001269 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fff4fe6dbf7 R09: 0000000000000007
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f0fdafc421c
R13: 00007f0fdafc4184 R14: 00007f0fdafc4077 R15: 00007f0fdafef570
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5826 at drivers/mtd/mtdpart.c:37 release_mtd_partition+0x71/0x90 drivers/mtd/mtdpart.c:37
Modules linked in:
CPU: 0 UID: 0 PID: 5826 Comm: syz-executor397 Not tainted 6.13.0-syzkaller-09734-g2a9f04bde07a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:release_mtd_partition+0x71/0x90 drivers/mtd/mtdpart.c:37
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 1e 48 8b 7b 38 e8 ef 84 cd fb 48 89 df 5b 5d e9 e5 84 cd fb e8 70 4a 75 fb 90 <0f> 0b 90 eb c2 e8 a5 29 d8 fb eb db 48 89 ef e8 9b 29 d8 fb eb a5
RSP: 0018:ffffc90003e1f828 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802c1d1000 RCX: ffffffff8b417995
RDX: ffff8880310c3c00 RSI: ffffffff86439150 RDI: ffff88802c1d1000
RBP: ffff88802c1d1648 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000004 R11: ffffffff81000130 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055558b9cd480(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 0000000034aca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mtd_release+0xa0/0xd0 drivers/mtd/mtdcore.c:101
 device_release+0xa1/0x240 drivers/base/core.c:2567
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1e4/0x5a0 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3773
 add_mtd_device+0xbb3/0x1700 drivers/mtd/mtdcore.c:750
 mtd_add_partition+0x300/0x650 drivers/mtd/mtdpart.c:279
 mtdchar_blkpg_ioctl+0x20d/0x250 drivers/mtd/mtdchar.c:562
 mtdchar_ioctl+0xbbe/0x2050 drivers/mtd/mtdchar.c:1216
 mtdchar_unlocked_ioctl+0xb0/0xf0 drivers/mtd/mtdchar.c:1239
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0fdaf83199
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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:00007fff4fe6de58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fff4fe6de70 RCX: 00007f0fdaf83199
RDX: 0000000000000008 RSI: 0000000000001269 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fff4fe6dbf7 R09: 0000000000000007
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f0fdafc421c
R13: 00007f0fdafc4184 R14: 00007f0fdafc4077 R15: 00007f0fdafef570
 </TASK>


---
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