From: Takashi Iwai <tiwai@suse.de> mainline inclusion from mainline-v7.0-rc7 commit 75dc1980cf48826287e43dc7a49e310c6691f97e category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/14530 CVE: CVE-2026-31776 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- The recent refactoring of xfi driver changed the assignment of atc->daios[] at atc_get_resources(); now it loops over all enum DAIOTYP entries while it looped formerly only a part of them. The problem is that the last entry, SPDIF1, is a special type that is used only for hw20k1 CTSB073X model (as a replacement of SPDIFIO), and there is no corresponding definition for hw20k2. Due to the lack of the info, it caused a kernel crash on hw20k2, which was already worked around by the commit b045ab3dff97 ("ALSA: ctxfi: Fix missing SPDIFI1 index handling"). This patch addresses the root cause of the regression above properly, simply by skipping the incorrect SPDIF1 type in the parser loop. For making the change clearer, the code is slightly arranged, too. Fixes: a2dbaeb5c61e ("ALSA: ctxfi: Refactor resource alloc for sparse mappings") Cc: <stable@vger.kernel.org> Link: https://bugzilla.suse.com/show_bug.cgi?id=1259925 Link: https://patch.msgid.link/20260331081227.216134-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de> Conflicts: sound/pci/ctxfi/ctatc.c [commit 9b4a22733c156 not merged] --- sound/pci/ctxfi/ctatc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c index 06775519dab0..21f18cc586ab 100644 --- a/sound/pci/ctxfi/ctatc.c +++ b/sound/pci/ctxfi/ctatc.c @@ -1396,8 +1396,12 @@ static int atc_get_resources(struct ct_atc *atc) daio_mgr = (struct daio_mgr *)atc->rsc_mgrs[DAIO]; da_desc.msr = atc->msr; for (i = 0, atc->n_daio = 0; i < num_daios; i++) { - da_desc.type = (atc->model != CTSB073X) ? i : - ((i == SPDIFIO) ? SPDIFI1 : i); + if (i == SPDIFI1) + continue; + if (atc->model == CTSB073X && i == SPDIFIO) + da_desc.type = SPDIFI1; + else + da_desc.type = i; err = daio_mgr->get_daio(daio_mgr, &da_desc, (struct daio **)&atc->daios[i]); if (err) { -- 2.22.0