Hi all,
This patch corrects a bug in drm driver by forcing
its minor number in the limits of the allocated
resources: DRM(stub_list)[DRM_STUB_MAXCARDS]
0<= minor < DRM_STUB_MAXCARDS.
Manifestation: Xorg-6.9.0 SIGSEGFAULTs when the
loading of dri module is enabled (direct rendering)
Xorg-6.9.0 (and evidently not the previous versions)
has defined DRM_MAX_MINOR as 255 (and Xorg-6.9.0
tries to open all of them) while in the kernel:
DRM_STUB_MAXCARDS is defined as 16.
Please apply for 2.4.33 reliese ;-))
Kernel version: 2.4.32
Subsistem: drivers/char/drm
Best regards
Marin Mitov
=========================================
--- a/drivers/char/drm/drm_stub.h 2003-11-28 20:26:20.000000000 +0200
+++ b/drivers/char/drm/drm_stub.h 2006-02-11 19:42:58.000000000 +0200
@@ -52,6 +52,7 @@
int err = -ENODEV;
struct file_operations *old_fops;
+ if (minor < 0 || minor >=DRM_STUB_MAXCARDS) return -ENODEV;
if (!DRM(stub_list) || !DRM(stub_list)[minor].fops) return -ENODEV;
old_fops = filp->f_op;
filp->f_op = fops_get(DRM(stub_list)[minor].fops);
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