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systemd/0001-login-fix-pos-array-allocation.patch

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From a1937e679f76758635d295287398abe526de2522 Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@gmail.com>
Date: Tue, 25 Feb 2014 12:20:25 +0100
Subject: [PATCH] login: fix pos-array allocation
GREEDY_REALLOC takes a pointer to the real size, not the array-width as
argument. Therefore, our array is currently way to small to keep the seat
positions.
Introduce GREEDY_REALLOC0_T() as typed version of GREEDY_REALLOC and store
the array-width instead of array-size.
---
src/login/logind-seat.c | 2 +-
src/shared/util.h | 9 +++++++++
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git src/login/logind-seat.c src/login/logind-seat.c
index 631be5f..36ec7ed 100644
--- src/login/logind-seat.c
+++ src/login/logind-seat.c
@@ -475,7 +475,7 @@ void seat_claim_position(Seat *s, Session *session, unsigned int pos) {
if (seat_has_vts(s))
pos = session->vtnr;
- if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1))
+ if (!GREEDY_REALLOC0_T(s->positions, s->position_count, pos + 1))
return;
seat_evict_position(s, session);
diff --git src/shared/util.h src/shared/util.h
index 9913fce..78b1444 100644
--- src/shared/util.h
+++ src/shared/util.h
@@ -723,6 +723,15 @@ void* greedy_realloc0(void **p, size_t *allocated, size_t need);
#define GREEDY_REALLOC0(array, allocated, need) \
greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
+#define GREEDY_REALLOC0_T(array, count, need) \
+ ({ \
+ size_t _size = (count) * sizeof((array)[0]); \
+ void *_ptr = GREEDY_REALLOC0((array), _size, (need)); \
+ if (_ptr) \
+ (count) = _size / sizeof((array)[0]); \
+ _ptr; \
+ })
+
static inline void _reset_errno_(int *saved_errno) {
errno = *saved_errno;
}
--
1.7.9.2