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drm/xe/xe_survivability: Add index bound check

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Fix static analysis tool reported issue. Add index bound check before
accessing info array to prevent out of bound.

Fixes: f4e9fc967a ("drm/xe/xe_survivability: Redesign survivability mode")
Signed-off-by: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patch.msgid.link/20251219105224.871930-6-riana.tauro@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Riana Tauro 2025-12-19 16:22:27 +05:30 committed by Rodrigo Vivi
parent 3d50c69c58
commit 13fe9fa7f4
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GPG Key ID: FA625F640EEB13CA
1 changed files with 7 additions and 3 deletions
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10
drivers/gpu/drm/xe/xe_survivability_mode.c
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@ -251,10 +251,14 @@ static umode_t survivability_info_attrs_visible(struct kobject *kobj, struct att
struct xe_survivability *survivability = &xe->survivability;
u32 *info = survivability->info;
/* FDO mode is visible only when supported */
if (idx >= MAX_SCRATCH_REG && survivability->version >= 2)
/*
* Last index in survivability_info_attrs is fdo mode and is applicable only in
* version 2 of survivability mode
*/
if (idx == MAX_SCRATCH_REG && survivability->version >= 2)
return 0400;
else if (info[idx])
if (idx < MAX_SCRATCH_REG && info[idx])
return 0400;
return 0;