Re: [syzbot] [serial?] WARNING in register_console
Tetsuo Handa <[email protected]>
| Newsgroups | gmane.linux.serial,gmane.linux.kernel |
|---|---|
| Message-ID | <[email protected]> |
On 2026/08/07 15:45, Jiri Slaby wrote: >> printk: legacy console [ttyS0] enabled >> ------------[ cut here ]------------ >> IS_ERR(kt) > > Well, the creation of "pr/legacy" thread failed. Would be nice to see what is actual PTR_ERR(kt). > >> RAX: fffffffffffffffc fffffffffffffffc = -EINTR > console_store() is serialized by a mutex. So this should not be a race. I cannot reproduce using: > while :; do > echo 0 >/sys/class/tty/ttyS0/console > echo 1 > /sys/class/tty/ttyS0/console > done > > That's what the reproducer suggests is the cause. A patch was already posted to https://lkml.kernel.org/r/[email protected] and sashiko's review is available at https://sashiko.dev/#/patchset/[email protected] .