xserver/xkb
Mikhail Dmitrichenko d6c462f599 xkb: preserve buffer on realloc failure
_Concat() stored the realloc() result directly in its input pointer, so
an allocation failure could drop the only reference to the original
buffer when callers assigned the return value back to their destination
pointer.

Keep the old pointer until realloc() succeeds, avoiding the leak
reported by static analysis.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Mikhail Dmitrichenko <m.dmitrichenko222@gmail.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2221>
2026-05-25 12:48:50 +03:00
..
ddxBeep.c Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
ddxCtrls.c Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
ddxKillSrv.c Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
ddxLEDs.c Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
ddxLoad.c xkb: handle -Wanalyzer-null-dereference in XkbDDXLoadKeymapByNames() 2026-04-11 18:12:24 +00:00
ddxPrivate.c Introduce a consistent coding style 2012-03-21 13:54:42 -07:00
ddxVT.c Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
maprules.c xkb: preserve buffer on realloc failure 2026-05-25 12:48:50 +03:00
meson.build Add a Meson build system alongside autotools. 2017-04-26 15:25:27 -07:00
README.compiled Strip trailing whitespace from source files 2026-01-25 10:40:02 -08:00
xkb-procs.h xkb: rename xkb.h to xkb-procs.h 2022-07-08 14:27:04 +00:00
xkb.c xkb: Add bounds check for action data in CheckKeyActions() 2026-05-10 23:14:20 +00:00
xkbAccessX.c Zero out structs to avoid leaking information via padding 2026-04-24 01:14:55 +00:00
xkbActions.c xkb: Handle allocation failures in _XkbNextFreeFilter() 2026-04-28 02:37:44 +00:00
XKBAlloc.c xkb: ensure XkbAllocNames sets num_rg to 0 on allocation failure 2026-01-25 10:40:01 -08:00
xkbDflts.h Use ARRAY_SIZE all over the tree 2017-10-30 13:45:20 -04:00
xkbEvents.c Zero out structs to avoid leaking information via padding 2026-04-24 01:14:55 +00:00
xkbfmisc.c xkb: drop ununsed XkbNameMatchesPattern() 2026-01-19 12:32:25 -08:00
XKBGAlloc.c xkb: add missing NULL check for strdup in XkbAddGeomProperty update path 2026-04-28 02:37:43 +00:00
xkbgeom.h Drop trailing whitespaces 2014-11-12 10:25:00 +10:00
xkbInit.c xkb: fail if we can't strdup our default rules 2026-04-28 02:37:43 +00:00
xkbLEDs.c Fix typos 2026-03-03 06:50:01 -03:00
XKBMAlloc.c xkb: Check that needed is > 0 in XkbResizeKeyActions 2026-01-25 10:40:01 -08:00
XKBMisc.c xkb: Fix buffer overflow in XkbChangeTypesOfKey() 2026-01-25 10:40:01 -08:00
xkbout.c xkb: drop defining XKBSRV_NEED_FILE_FUNCS 2026-01-19 12:32:18 -08:00
xkbPrKeyEv.c xwayland: Don't run key behaviors and actions 2026-01-25 10:39:58 -08:00
xkbSwap.c xkb: drop swapping request length fields 2026-01-25 10:39:58 -08:00
xkbtext.c xkb: Fix potential uninitialized variable 2026-04-29 13:08:12 +00:00
xkbUtils.c Zero out structs to avoid leaking information via padding 2026-04-24 01:14:55 +00:00
XKM_file_format.txt Fix typos 2026-03-03 06:50:01 -03:00
xkmread.c xkb: Fix out-of-bounds array access in xkmread.c ReadXkmGeometry 2026-05-10 23:18:25 +00:00

The X server uses this directory to store the compiled version of the
current keymap and/or any scratch keymaps used by clients.  The X server
or some other tool might destroy or replace the files in this directory,
so it is not a safe place to store compiled keymaps for long periods of
time.  The default keymap for any server is usually stored in:
     X<num>-default.xkm
where <num> is the display number of the server in question, which makes
it possible for several servers *on the same host* to share the same
directory.

Unless the X server is modified, sharing this directory between servers on
different hosts could cause problems.