==1563== Conditional jump or move depends on uninitialised value(s)
==1563==    at 0xDD42935: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xDB0F146: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xD99D5EE: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xD970CF9: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xD971013: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xD971F3A: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xCA8D46D: glamor_flush_composite_rects (glamor_render.c:718)
==1563==    by 0xCA8ED09: glamor_composite_with_shader (glamor_render.c:1299)
==1563==    by 0xCA91851: glamor_composite_glyph_rects (glamor_render.c:1886)
==1563==    by 0xCA86387: glamor_glyphs_flush_mask (glamor_glyphs.c:1170)
==1563==    by 0xCA863C2: glamor_glyphs_flush_dst (glamor_glyphs.c:1187)
==1563==    by 0xCA85FA6: glamor_buffer_glyph (glamor_glyphs.c:1250)
==1563==  Uninitialised value was created by a heap allocation
==1563==    at 0x4C29F90: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1563==    by 0xDDB16EE: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xD990102: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xD861E00: ??? (in /usr/lib/xorg/modules/dri/radeonsi_dri.so)
==1563==    by 0xCA8D5C1: glamor_init_composite_shaders (glamor_render.c:414)
==1563==    by 0xCA7D887: glamor_init (glamor.c:545)
==1563==    by 0xC43BC1B: ??? (in /usr/lib/xorg/modules/drivers/radeon_drv.so)
==1563==    by 0xC3FB277: ??? (in /usr/lib/xorg/modules/drivers/radeon_drv.so)
==1563==    by 0xC435F68: ??? (in /usr/lib/xorg/modules/drivers/radeon_drv.so)
==1563==    by 0x434C44: AddScreen (dispatch.c:3866)
==1563==    by 0x47793D: InitOutput (xf86Init.c:884)
==1563==    by 0x438276: dix_main (main.c:202)
==1563== 
==1563== Invalid write of size 4
==1563==    at 0x123B0263: fbBltOne (fbbltone.c:334)
==1563==    by 0x123B1C51: fbCopy1toN (fbcopy.c:123)
==1563==    by 0xCA7F567: glamor_copy_bail (glamor_copy.c:171)
==1563==    by 0xCA811D8: glamor_copy (glamor_copy.c:661)
==1563==    by 0x57ECEE: miCopyRegion (micopy.c:121)
==1563==    by 0x57F12E: miDoCopy (micopy.c:296)
==1563==    by 0xCA81283: glamor_copy_plane (glamor_copy.c:681)
==1563==    by 0x526D63: damageCopyPlane (damage.c:797)
==1563==    by 0x43149F: ProcCopyPlane (dispatch.c:1719)
==1563==    by 0x434AC4: Dispatch (dispatch.c:432)
==1563==    by 0x43851D: dix_main (main.c:298)
==1563==    by 0x423B8E: main (stubmain.c:34)
==1563==  Address 0xaac is not stack'd, malloc'd or (recently) free'd
==1563== 
==1563== Syscall param msync(start) points to uninitialised byte(s)
==1563==    at 0x6A74B6D: ??? (in /usr/lib/libc-2.21.so)
==1563==    by 0x5567223: ??? (in /usr/lib/libunwind.so.8.0.1)
==1563==    by 0x556A006: ??? (in /usr/lib/libunwind.so.8.0.1)
==1563==    by 0x556B261: ??? (in /usr/lib/libunwind.so.8.0.1)
==1563==    by 0x556B608: ??? (in /usr/lib/libunwind.so.8.0.1)
==1563==    by 0x5567B30: _ULx86_64_step (in /usr/lib/libunwind.so.8.0.1)
==1563==    by 0x59E821: xorg_backtrace (backtrace.c:100)
==1563==    by 0x5A249A: OsSigHandler (osinit.c:129)
==1563==    by 0x69C45AF: ??? (in /usr/lib/libc-2.21.so)
==1563==    by 0x123B0262: fbBltOne (fbbltone.c:334)
==1563==    by 0x123B1C51: fbCopy1toN (fbcopy.c:123)
==1563==    by 0xCA7F567: glamor_copy_bail (glamor_copy.c:171)
==1563==  Address 0xfff000000 is on thread 1's stack
==1563==  Uninitialised value was created
==1563==    at 0x123B0263: fbBltOne (fbbltone.c:334)
==1563==    by 0x123B1C51: fbCopy1toN (fbcopy.c:123)
==1563==    by 0xCA7F567: glamor_copy_bail (glamor_copy.c:171)
==1563==    by 0xCA811D8: glamor_copy (glamor_copy.c:661)
==1563==    by 0x57ECEE: miCopyRegion (micopy.c:121)
==1563==    by 0x57F12E: miDoCopy (micopy.c:296)
==1563==    by 0xCA81283: glamor_copy_plane (glamor_copy.c:681)
==1563==    by 0x526D63: damageCopyPlane (damage.c:797)
==1563==    by 0x43149F: ProcCopyPlane (dispatch.c:1719)
==1563==    by 0x434AC4: Dispatch (dispatch.c:432)
==1563==    by 0x43851D: dix_main (main.c:298)
==1563==    by 0x423B8E: main (stubmain.c:34)
==1563== 
==1563== 
==1563== HEAP SUMMARY:
==1563==     in use at exit: 38,208,210 bytes in 103,425 blocks
==1563==   total heap usage: 674,708 allocs, 571,283 frees, 198,210,181 bytes allocated
==1563== 
==1563== For a detailed leak analysis, rerun with: --leak-check=full
==1563== 
==1563== For counts of detected and suppressed errors, rerun with: -v
==1563== ERROR SUMMARY: 13 errors from 6 contexts (suppressed: 0 from 0)