[syzbot] Monthly serial report (Feb 2024)

[syzbot] Monthly serial report (Feb 2024)

[syzbot]

Hello serial maintainers/developers,

This is a 31-day syzbot report for the serial subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/serial

During the period, 3 new issues were detected and 0 were fixed.
In total, 16 issues are still open and 40 have been fixed so far.

Some of the still happening issues:

Ref Crashes Repro Title
<1> 51656   Yes   possible deadlock in console_flush_all (2)
                  https://syzkaller.appspot.com/bug?extid=f78380e4eae53c64125c
<2> 4747    Yes   BUG: sleeping function called from invalid context in console_lock (2)
                  https://syzkaller.appspot.com/bug?extid=dbac96d8e73b61aa559c
<3> 207     Yes   KMSAN: uninit-value in n_tty_receive_buf_standard
                  https://syzkaller.appspot.com/bug?extid=559c7fe4b8bac56d38c2
<4> 121     Yes   KASAN: stack-out-of-bounds Read in sched_show_task
                  https://syzkaller.appspot.com/bug?extid=8d2757d62d403b2d9275
<5> 73      Yes   general protection fault in serial8250_tx_chars
                  https://syzkaller.appspot.com/bug?extid=837b8c9032c053262db8
<6> 60      Yes   BUG: soft lockup in tx
                  https://syzkaller.appspot.com/bug?extid=5e87db90e68fbc4707c6
<7> 36      Yes   INFO: task can't die in show_free_areas
                  https://syzkaller.appspot.com/bug?extid=8f41dccfb6c03cc36fd6
<8> 6       Yes   INFO: task hung in paste_selection (2)
                  https://syzkaller.appspot.com/bug?extid=275e275bd3f536725dd8
<9> 2       No    KASAN: slab-use-after-free Read in tty_write_room (2)
                  https://syzkaller.appspot.com/bug?extid=2a81fdd5c6ddffee3894

---
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Re: [syzbot] Monthly serial report (Feb 2024)

[Tony Lindgren]

Hi Hillf,

* syzbot <syzbot+listbb8340e4e1f8191bee93@syzkaller.appspotmail.com> [700101 02:00]:
> <5> 73      Yes   general protection fault in serial8250_tx_chars
>                   https://syzkaller.appspot.com/bug?extid=837b8c9032c053262db8

Can you please send your earlier fix [0] to the linux-serial mailing list
so it can be applied?

Not quite sure what triggers the serial_port_remove().. But let's fix the
serial_port_runtime_resume() issue first.

Regards,

Tony

[0] https://groups.google.com/g/syzkaller-bugs/c/m3vOaJRjnMs