From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: stable@vger.kernel.org
Cc: Petr Mladek <pmladek@suse.com>
Subject: printk: queue wake_up_klogd irq_work only if per-CPU areas are ready
Date: Tue, 14 Apr 2020 21:06:13 +0900 [thread overview]
Message-ID: <20200414120613.GD12779@google.com> (raw)
Hello,
Commit ab6f762f0f53162d41 Linus' HEAD.
printk_deferred() does not make sure that it's safe to write to
per-CPU data, which causes problems when printk_deferred() is
invoked "too early", before per-CPU areas are initialized. There
are multiple bug reports, e.g.
https://bugzilla.kernel.org/show_bug.cgi?id=206847
-ss
next reply other threads:[~2020-04-14 12:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-14 12:06 Sergey Senozhatsky [this message]
2020-04-14 12:14 ` printk: queue wake_up_klogd irq_work only if per-CPU areas are ready Greg KH
2020-04-14 13:13 ` Sergey Senozhatsky
2020-07-20 12:50 ` Greg KH
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