linux-kernel - [syzbot] [bcachefs?] [rcu?] WARNING: lock held when returning to user space in srcu_lock

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Message-ID: <000000000000143d6f0618541652@google.com>
Date: Mon, 13 May 2024 04:21:26 -0700
From: syzbot <syzbot+d797fe78808e968d6c84@...kaller.appspotmail.com>
To: jiangshanlai@...il.com, josh@...htriplett.org, kent.overstreet@...ux.dev, 
	linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	mathieu.desnoyers@...icios.com, paulmck@...nel.org, rcu@...r.kernel.org, 
	rostedt@...dmis.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] [rcu?] WARNING: lock held when returning to user
 space in srcu_lock_acquire

Hello,

syzbot found the following issue on:

HEAD commit:    1c9135d29e9e Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=14ffaa6c980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7d2d53e64c7e6a4f
dashboard link: https://syzkaller.appspot.com/bug?extid=d797fe78808e968d6c84
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1705e85c980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11612d04980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/52dd1b4921ab/disk-1c9135d2.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1a4f1788dc25/vmlinux-1c9135d2.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b8d8ebd42a80/Image-1c9135d2.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/0471560e01b3/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d797fe78808e968d6c84@...kaller.appspotmail.com

 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
================================================
WARNING: lock held when returning to user space!
6.9.0-rc7-syzkaller-g1c9135d29e9e #0 Not tainted
------------------------------------------------
syz-executor367/6238 is leaving the kernel with locks still held!
1 lock held by syz-executor367/6238:
 #0: ffff0000dcc84250 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:115


---
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