linux-kernel - Re: [syzbot] [bcachefs?] possible deadlock in start_poll_synchronize_rcu

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Message-ID: <683b93ca.a00a0220.d8eae.0021.GAE@google.com>
Date: Sat, 31 May 2025 16:42:02 -0700
From: syzbot <syzbot+cbc79a37b5fa23efd23b@...kaller.appspotmail.com>
To: hdanton@...a.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bcachefs?] possible deadlock in start_poll_synchronize_rcu_expedited

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

lib/rhashtable.c:1085:6: error: call to undeclared function 'object_is_on_stack'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

Tested on:

commit:         4cb6c8af selftests/filesystems: Fix build of anon_inod..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=22765942f2e2ebcf
dashboard link: https://syzkaller.appspot.com/bug?extid=cbc79a37b5fa23efd23b
compiler:       Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
patch:          https://syzkaller.appspot.com/x/patch.diff?x=15e9d00c580000