Reminder: 5 open syzbot bugs in "net/x25" subsystem

From: Eric Biggers
Date: Tue Jul 23 2019 - 22:29:02 EST


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Of the currently open syzbot reports against the upstream kernel, I've manually
marked 5 of them as possibly being bugs in the "net/x25" subsystem. I've listed
these reports below, sorted by an algorithm that tries to list first the reports
most likely to be still valid, important, and actionable.

If you believe a bug is no longer valid, please close the syzbot report by
sending a '#syz fix', '#syz dup', or '#syz invalid' command in reply to the
original thread, as explained at https://goo.gl/tpsmEJ#status

If you believe I misattributed a bug to the "net/x25" subsystem, please let me
know, and if possible forward the report to the correct people or mailing list.

Here are the bugs:

--------------------------------------------------------------------------------
Title: KASAN: null-ptr-deref Read in x25_connect
Last occurred: 0 days ago
Reported: 42 days ago
Branches: net and net-next
Dashboard link: https://syzkaller.appspot.com/bug?id=5b0ecf0386f56be7fe7210a14d0f62df765c0c39
Original thread: https://lkml.kernel.org/lkml/0000000000007ce6f5058b0715ea@xxxxxxxxxx/T/#u

Unfortunately, this bug does not have a reproducer.

The original thread for this bug has received 2 replies; the last was 42 days
ago.

If you fix this bug, please add the following tag to the commit:
Reported-by: syzbot+777a2aab6ffd397407b5@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread. For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/0000000000007ce6f5058b0715ea@xxxxxxxxxx

--------------------------------------------------------------------------------
Title: general protection fault in x25_connect
Last occurred: 23 days ago
Reported: 42 days ago
Branches: net and net-next
Dashboard link: https://syzkaller.appspot.com/bug?id=65f107a71a1cb5637149cd163a2919dd622f0d30
Original thread: https://lkml.kernel.org/lkml/000000000000800bf0058b07151d@xxxxxxxxxx/T/#u

Unfortunately, this bug does not have a reproducer.

No one has replied to the original thread for this bug yet.

If you fix this bug, please add the following tag to the commit:
Reported-by: syzbot+2fde26e61fda58e5f88b@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread. For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/000000000000800bf0058b07151d@xxxxxxxxxx

--------------------------------------------------------------------------------
Title: general protection fault in refcount_sub_and_test_checked
Last occurred: 59 days ago
Reported: 113 days ago
Branches: net and net-next
Dashboard link: https://syzkaller.appspot.com/bug?id=909a75efeca0594a7dd4356d84f147891407cda8
Original thread: https://lkml.kernel.org/lkml/0000000000008424a205857b74ef@xxxxxxxxxx/T/#u

Unfortunately, this bug does not have a reproducer.

No one replied to the original thread for this bug.

If you fix this bug, please add the following tag to the commit:
Reported-by: syzbot+31b6a0f5d6d5c3b75948@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread. For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/0000000000008424a205857b74ef@xxxxxxxxxx

--------------------------------------------------------------------------------
Title: KASAN: use-after-free Read in x25_write_internal
Last occurred: 154 days ago
Reported: 202 days ago
Branches: net and net-next
Dashboard link: https://syzkaller.appspot.com/bug?id=4f2fbe41c46efe42fad560f74913604ca8011d2d
Original thread: https://lkml.kernel.org/lkml/0000000000006ee231057e779375@xxxxxxxxxx/T/#u

Unfortunately, this bug does not have a reproducer.

No one replied to the original thread for this bug.

If you fix this bug, please add the following tag to the commit:
Reported-by: syzbot+426b913e690764e50c83@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread. For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/0000000000006ee231057e779375@xxxxxxxxxx

--------------------------------------------------------------------------------
Title: INFO: rcu detected stall in x25_connect
Last occurred: 152 days ago
Reported: 204 days ago
Branches: net and net-next
Dashboard link: https://syzkaller.appspot.com/bug?id=56a3e28b7cbfd2255f7b8c6483e7f7f9523a1a47
Original thread: https://lkml.kernel.org/lkml/0000000000009b5ae5057e4cd7d1@xxxxxxxxxx/T/#u

Unfortunately, this bug does not have a reproducer.

No one replied to the original thread for this bug.

If you fix this bug, please add the following tag to the commit:
Reported-by: syzbot+564c57b4bf1df3ce1c94@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread. For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/0000000000009b5ae5057e4cd7d1@xxxxxxxxxx