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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2024-07-26 00:56:40 +0900
committerTakashi Sakamoto <o-takashi@sakamocchi.jp>2024-07-27 10:28:36 +0900
commitc1839501fe3e67d98635f159dba8b170d08f6521 (patch)
treed8f352f337d752abdf8944008ece4dd11ce146aa /sound
parent00e3913b0416fe69d28745c0a2a340e2f76c219c (diff)
ALSA: firewire-lib: fix wrong value as length of header for CIP_NO_HEADER case
In a commit 1d717123bb1a ("ALSA: firewire-lib: Avoid -Wflex-array-member-not-at-end warning"), DEFINE_FLEX() macro was used to handle variable length of array for header field in struct fw_iso_packet structure. The usage of macro has a side effect that the designated initializer assigns the count of array to the given field. Therefore CIP_HEADER_QUADLETS (=2) is assigned to struct fw_iso_packet.header, while the original designated initializer assigns zero to all fields. With CIP_NO_HEADER flag, the change causes invalid length of header in isochronous packet for 1394 OHCI IT context. This bug affects all of devices supported by ALSA fireface driver; RME Fireface 400, 800, UCX, UFX, and 802. This commit fixes the bug by replacing it with the alternative version of macro which corresponds no initializer. Cc: stable@vger.kernel.org Fixes: 1d717123bb1a ("ALSA: firewire-lib: Avoid -Wflex-array-member-not-at-end warning") Reported-by: Edmund Raile <edmund.raile@proton.me> Closes: https://lore.kernel.org/r/rrufondjeynlkx2lniot26ablsltnynfaq2gnqvbiso7ds32il@qk4r6xps7jh2/ Reviewed-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/20240725155640.128442-1-o-takashi@sakamocchi.jp Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Diffstat (limited to 'sound')
-rw-r--r--sound/firewire/amdtp-stream.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index d35d0a420ee0..1a163bbcabd7 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -1180,8 +1180,7 @@ static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_
(void)fw_card_read_cycle_time(fw_parent_device(s->unit)->card, &curr_cycle_time);
for (i = 0; i < packets; ++i) {
- DEFINE_FLEX(struct fw_iso_packet, template, header,
- header_length, CIP_HEADER_QUADLETS);
+ DEFINE_RAW_FLEX(struct fw_iso_packet, template, header, CIP_HEADER_QUADLETS);
bool sched_irq = false;
build_it_pkt_header(s, desc->cycle, template, pkt_header_length,