From: Al Viro <viro@zeniv.linux.org.uk>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>,
syzbot <syzbot+019072ad24ab1d948228@syzkaller.appspotmail.com>,
jk@ozlabs.org, linux-efi@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [efi?] [fs?] possible deadlock in efivarfs_actor
Date: Mon, 10 Mar 2025 23:58:31 +0000 [thread overview]
Message-ID: <20250310235831.GL2023217@ZenIV> (raw)
In-Reply-To: <CAMj1kXH0Myy3bV-hFNWnoUk6ZAa6MAd1zFTM-X6dXiJPx==w0A@mail.gmail.com>
On Mon, Mar 10, 2025 at 07:21:53PM +0100, Ard Biesheuvel wrote:
> The repro log also has
>
> program crashed: BUG: unable to handle kernel paging request in
> efivarfs_pm_notify
>
> preceding the other log output regarding the locks, so the deadlock
> might be a symptom of another problem.
This:
struct path path = { .mnt = NULL, .dentry = sfi->sb->s_root, };
_What_ .mnt = NULL? That's already a bug. There is no such thing
as mountless open file; how would the kernel know not to shut the
damn thing down right under you?
prev parent reply other threads:[~2025-03-10 23:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-09 2:52 [syzbot] [efi?] [fs?] possible deadlock in efivarfs_actor syzbot
2025-03-09 9:21 ` Hillf Danton
2025-03-09 9:51 ` syzbot
2025-03-10 7:21 ` Ard Biesheuvel
2025-03-10 16:50 ` James Bottomley
2025-03-10 18:21 ` Ard Biesheuvel
2025-03-10 18:24 ` Ard Biesheuvel
2025-03-10 23:25 ` Al Viro
2025-03-10 23:58 ` Al Viro [this message]
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