From: capyenglishlite@gmail.com
To: netdev@vger.kernel.org
Subject: [BUG] rose/ax25: use-after-free in rose_transmit_restart_request()
Date: Wed, 13 May 2026 19:27:37 +0300 [thread overview]
Message-ID: <88b4eea5b5daa681fc9747cd844904e2@gmail.com> (raw)
Hi all,
I am reporting a use-after-free in ROSE/AX.25 networking subsystem.
Bug:
In rose_transmit_restart_request() (net/rose/rose_link.c),
ax25_send_frame() accesses a rose_neigh object after it may be freed
by rose_neigh_put() in rose_t0timer_expiry().
Root cause:
Missing reference hold across timer vs transmit race.
Fix:
rose_neigh_hold(neigh);
ax25_send_frame(...);
rose_neigh_put(neigh);
Syzbot report:
https://syzkaller.appspot.com/bug?extid=9c8999af06ca7df15fc6
Best regards,
Afi0
reply other threads:[~2026-05-13 16:27 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=88b4eea5b5daa681fc9747cd844904e2@gmail.com \
--to=capyenglishlite@gmail.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.