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util: return NULL in memmap_new() for a size 0

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Assisted-by: Claude:claude-opus-4-6
Part-of: <https://gitlab.freedesktop.org/libinput/libei/-/merge_requests/388>
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Peter Hutterer 2026-04-17 18:50:23 +10:00 • committed by Marge Bot
parent bacd62cae0
commit 4440f15453
1 changed files with 3 additions and 0 deletions
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src/util-memmap.c
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@ -55,6 +55,9 @@ OBJECT_IMPLEMENT_GETTER(memmap, data, void *);
struct memmap *
memmap_new(int fd, size_t sz)
{
if (sz == 0)
return NULL;
_unref_(memmap) *memmap = memmap_create(NULL);
void *map = mmap(NULL, sz, PROT_READ, MAP_PRIVATE, fd, 0);