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accel/ivpu: Add bounds checks for firmware log indices

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Add validation that read and write indices in the firmware log buffer
are within valid bounds (< data_size) before using them. If
out-of-bounds indices are encountered (from firmware), clamp them to
safe values instead of proceeding with invalid offsets.

This prevents potential out-of-bounds buffer access when firmware
supplies invalid log indices.

Fixes: 1fc1251149 ("accel/ivpu: Refactor functions in ivpu_fw_log.c")
Cc: [email protected] # v6.18+
Signed-off-by: Andrzej Kacprowski <[email protected]>
Reviewed-by: Karol Wachowski <[email protected]>
Signed-off-by: Karol Wachowski <[email protected]>
Link: https://patch.msgid.link/[email protected]
This commit is contained in:
Andrzej Kacprowski authored and Karol Wachowski committed 2026-06-02 07:47:50 +02:00
1 parent 1d0b597fac
commit dd1311bcf0
1 file changed
+5
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drivers/accel/ivpu/ivpu_fw_log.c
+5
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@@ -98,6 +98,11 @@ static void fw_log_print_buffer(struct vpu_tracing_buffer_header *log, const cha
u32 log_start = only_new_msgs ? READ_ONCE(log->read_index) : 0;
u32 log_end = READ_ONCE(log->write_index);
if (log_start >= data_size)
log_start = 0;
if (log_end > data_size)
log_end = data_size;
if (log->wrap_count == log->read_wrap_count) {
if (log_end <= log_start) {
drm_printf(p, "==== %s \"%s\" log empty ====\n", prefix, log->name);