Revision 7ff57e98fb78ad94edafbdc7435f2d745e9e6bb5 authored by Fabio M. De Francesco on 23 February 2022, 10:02:52 UTC, committed by Jakub Kicinski on 24 February 2022, 17:09:33 UTC
smc_pnetid_by_table_ib() uses read_lock() and then it calls smc_pnet_apply_ib()
which, in turn, calls mutex_lock(&smc_ib_devices.mutex).
read_lock() disables preemption. Therefore, the code acquires a mutex while in
atomic context and it leads to a SAC bug.
Fix this bug by replacing the rwlock with a mutex.
Reported-and-tested-by: syzbot+4f322a6d84e991c38775@syzkaller.appspotmail.com
Fixes: 64e28b52c7a6 ("net/smc: add pnet table namespace support")
Confirmed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Acked-by: Karsten Graul <kgraul@linux.ibm.com>
Link: https://lore.kernel.org/r/20220223100252.22562-1-fmdefrancesco@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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credits.rst
=======
Credits
=======
I want to thank all who contributed to this project and especially to:
(in alphabetical order)
Thomas Bogendörfer (tsbogend@bigbug.franken.de)
Tester, lots of bugfixes and hints.
Alan Cox (alan@lxorguk.ukuu.org.uk)
For help getting into standard-kernel.
Henner Eisen (eis@baty.hanse.de)
For X.25 implementation.
Volker Götz (volker@oops.franken.de)
For contribution of man-pages, the imontty-tool and a perfect
maintaining of the mailing-list at hub-wue.
Matthias Hessler (hessler@isdn4linux.de)
For creating and maintaining the FAQ.
Bernhard Hailer (Bernhard.Hailer@lrz.uni-muenchen.de)
For creating the FAQ, and the leafsite HOWTO.
Michael 'Ghandi' Herold (michael@abadonna.franken.de)
For contribution of the vbox answering machine.
Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
For his Sync-PPP-code.
Karsten Keil (keil@isdn4linux.de)
For adding 1TR6-support to the Teles-driver.
For the HiSax-driver.
Michael Knigge (knick@cove.han.de)
For contributing the imon-tool
Andreas Kool (akool@Kool.f.EUnet.de)
For contribution of the isdnlog/isdnrep-tool
Pedro Roque Marques (roque@di.fc.ul.pt)
For lot of new ideas and the pcbit driver.
Eberhard Mönkeberg (emoenke@gwdg.de)
For testing and help to get into kernel.
Thomas Neumann (tn@ruhr.de)
For help with Cisco-SLARP and keepalive
Jan den Ouden (denouden@groovin.xs4all.nl)
For contribution of the original teles-driver
Carsten Paeth (calle@calle.in-berlin.de)
For the AVM-B1-CAPI2.0 driver
Thomas Pfeiffer (pfeiffer@pds.de)
For V.110, extended T.70 and Hylafax extensions in isdn_tty.c
Max Riegel (riegel@max.franken.de)
For making the ICN hardware-documentation and test-equipment available.
Armin Schindler (mac@melware.de)
For the eicon active card driver.
Gerhard 'Fido' Schneider (fido@wuff.mayn.de)
For heavy-duty-beta-testing with his BBS ;)
Thomas Uhl (uhl@think.de)
For distributing the cards.
For pushing me to work ;-)
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