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(parent: f562a82) | patch
USB: fix usbmon BUG trigger
authorPete Zaitcev <zaitcev@redhat.com>
Mon, 8 Jan 2018 21:46:41 +0000 (15:46 -0600)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 17 Jan 2018 08:45:26 +0000 (09:45 +0100)
commit204d8fb1b417732359338ec0eae6eb16ff854bcc
tree73c9a9f81407ae6b5a44f8d4d1bd05a4e7a65f69tree | snapshot (tar.gz zip)
parentf562a823dd2564e8af78424e9580031387809bfdcommit | diff
USB: fix usbmon BUG trigger

commit 46eb14a6e1585d99c1b9f58d0e7389082a5f466b upstream.

Automated tests triggered this by opening usbmon and accessing the
mmap while simultaneously resizing the buffers. This bug was with
us since 2006, because typically applications only size the buffers
once and thus avoid racing. Reported by Kirill A. Shutemov.

Reported-by: <syzbot+f9831b881b3e849829fc@syzkaller.appspotmail.com>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/mon/mon_bin.c diff | blob | blame | history