linux-kernel - Re: [syzbot] kernel BUG in __tlb_remove_page

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Date:   Tue, 07 Feb 2023 06:31:17 -0800
From:   syzbot <syzbot+d87dd8e018fd2cc2528b@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, aneesh.kumar@...ux.ibm.com,
        dhowells@...hat.com, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        npiggin@...il.com, peterz@...radead.org,
        syzkaller-bugs@...glegroups.com, will@...nel.org
Subject: Re: [syzbot] kernel BUG in __tlb_remove_page_size (2)

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
INFO: rcu detected stall in corrupted

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P5549 } 2638 jiffies s: 2817 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):


Tested on:

commit:         fab9eebf iov_iter: Kill ITER_PIPE
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/ iov-fixes
console output: https://syzkaller.appspot.com/x/log.txt?x=14e2c6f3480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=facc234423e66dc6
dashboard link: https://syzkaller.appspot.com/bug?extid=d87dd8e018fd2cc2528b
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Note: no patches were applied.