linux-kernel - [syzbot] [kernel?] WARNING in notifier_chain

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Message-ID: <674f7257.050a0220.17bd51.0051.GAE@google.com>
Date: Tue, 03 Dec 2024 13:04:23 -0800
From: syzbot <syzbot+8b5a4b73931f20e049d7@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [kernel?] WARNING in notifier_chain_register (2)

Hello,

syzbot found the following issue on:

HEAD commit:    cdd30ebb1b9f module: Convert symbol namespace to string li..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1242efc0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=50c7a61469ce77e7
dashboard link: https://syzkaller.appspot.com/bug?extid=8b5a4b73931f20e049d7
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/658bd206f462/disk-cdd30ebb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/12cb86080d87/vmlinux-cdd30ebb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5181aac6587a/bzImage-cdd30ebb.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8b5a4b73931f20e049d7@...kaller.appspotmail.com

ubi0: attaching mtd0
ubi0: scanning is finished
------------[ cut here ]------------
notifier callback ubi_wl_reboot_notifier already registered
WARNING: CPU: 0 PID: 9647 at kernel/notifier.c:24 notifier_chain_register+0x29b/0x3f0 kernel/notifier.c:23
Modules linked in:
CPU: 0 UID: 0 PID: 9647 Comm: syz.5.633 Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:notifier_chain_register+0x29b/0x3f0 kernel/notifier.c:23
Code: f2 33 00 90 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 c5 d9 9e 00 48 8b 33 48 c7 c7 40 02 0a 8c e8 36 99 f4 ff 90 <0f> 0b 90 90 bb ef ff ff ff eb b4 e8 d5 f1 33 00 90 0f 0b 90 e9 36
RSP: 0018:ffffc9000bbe7948 EFLAGS: 00010246
RAX: 1aaf62e18450e600 RBX: ffff8880783ad8c8 RCX: 0000000000080000
RDX: ffffc90010051000 RSI: 0000000000009f08 RDI: 0000000000009f09
RBP: 0000000000000001 R08: ffffffff81601c02 R09: fffffbfff1cfa210
R10: dffffc0000000000 R11: fffffbfff1cfa210 R12: dffffc0000000000
R13: ffff8880783ad8c8 R14: dffffc0000000000 R15: ffffffff8f96cd48
FS:  00007f68a13f66c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f616ff8 CR3: 0000000029dcc000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __blocking_notifier_chain_register kernel/notifier.c:264 [inline]
 blocking_notifier_chain_register+0x61/0xc0 kernel/notifier.c:282
 ubi_wl_init+0x3396/0x3720 drivers/mtd/ubi/wl.c:1960
 ubi_attach+0x3e01/0x5b80 drivers/mtd/ubi/attach.c:1605
 ubi_attach_mtd_dev+0x1a3a/0x3540 drivers/mtd/ubi/build.c:1004
 ctrl_cdev_ioctl+0x346/0x570 drivers/mtd/ubi/cdev.c:1043
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf7/0x170 fs/ioctl.c:892
 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: 0033:0x7f68a357ff19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f68a13f6058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f68a3746160 RCX: 00007f68a357ff19
RDX: 0000000020000502 RSI: 0000000040186f40 RDI: 0000000000000008
RBP: 00007f68a35f3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f68a3746160 R15: 00007ffca371fc38
 </TASK>


---
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