53 lines
1.4 KiB
Diff
53 lines
1.4 KiB
Diff
From 751fbc59c30604980fdd19cb4b333d3cf2eccb24 Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <ofourdan@redhat.com>
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Date: Fri, 21 Jun 2024 14:37:24 +0200
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Subject: [PATCH] Fix deadlock in XRebindKeysym()
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Xlib is now built with threading support enabled from the constructor
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by default.
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XRebindKeysym() acquires the display lock, then calls:
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| XRebindKeysym()
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| LockDisplay()
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| ComputeMaskFromKeytrans()
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| -> XkbKeysymToModifiers()
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| -> _XkbLoadDpy()
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| -> XkbGetMap()
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| -> XkbGetUpdatedMap()
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| LockDisplay()
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And the dead lock:
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| Xlib ERROR: XKBGetMap.c line 575 thread 1fc6e580: locking display already
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| locked at KeyBind.c line 937
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To avoid the issue, call ComputeMaskFromKeytrans() from outside the display
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lock.
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Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
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Closes: https://gitlab.freedesktop.org/xorg/lib/libx11/-/issues/216
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Part-of: <https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_requests/256>
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---
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src/KeyBind.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/src/KeyBind.c b/src/KeyBind.c
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index a8181b91..a5e22131 100644
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--- a/src/KeyBind.c
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+++ b/src/KeyBind.c
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@@ -958,8 +958,9 @@ XRebindKeysym (
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memcpy ((char *) p->modifiers, (char *) mlist, (size_t) nb);
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p->key = keysym;
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p->mlen = nm;
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- ComputeMaskFromKeytrans(dpy, p);
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UnlockDisplay(dpy);
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+ ComputeMaskFromKeytrans(dpy, p);
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+
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return 0;
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}
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--
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2.45.2
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