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61006c540c
In the audio mixer handling code of ctxfi driver, the conf field is used as a kind of loop index, and it's referred in the index callbacks (amixer_index() and sum_index()). As spotted recently by fuzzers, the current code causes OOB access at those functions. | UBSAN: array-index-out-of-bounds in /build/reproducible-path/linux-6.17.8/sound/pci/ctxfi/ctamixer.c:347:48 | index 8 is out of range for type 'unsigned char [8]' After the analysis, the cause was found to be the lack of the proper (re-)initialization of conj field. This patch addresses those OOB accesses by adding the proper initializations of the loop indices. Reported-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Karsten Hohmeier <linux@hohmatik.de> Closes: https://bugs.debian.org/1121535 Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/all/aSk8KJI35H7gFru6@eldamar.lan/ Link: https://patch.msgid.link/20260119133212.189129-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>