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Revere modification of initializer; it can lead to race conditions where two 

allocation would pick the `empty' space causing a panic later on.
This commit is contained in:
reinoud 2022-02-03 09:46:26 +00:00
parent d87b090947
commit 3eb3a2d0ad
1 changed files with 4 additions and 4 deletions
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8
sys/fs/udf/udf_allocation.c
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@ -1,4 +1,4 @@
/* $NetBSD: udf_allocation.c,v 1.45 2022/01/28 20:00:52 reinoud Exp $ */
/* $NetBSD: udf_allocation.c,v 1.46 2022/02/03 09:46:26 reinoud Exp $ */
/*
* Copyright (c) 2006, 2008 Reinoud Zandijk
@ -28,7 +28,7 @@
#include <sys/cdefs.h>
#ifndef lint
__KERNEL_RCSID(0, "$NetBSD: udf_allocation.c,v 1.45 2022/01/28 20:00:52 reinoud Exp $");
__KERNEL_RCSID(0, "$NetBSD: udf_allocation.c,v 1.46 2022/02/03 09:46:26 reinoud Exp $");
#endif /* not lint */
@ -863,8 +863,8 @@ udf_search_free_vatloc(struct udf_mount *ump, uint32_t *lbnumres)
ump->vat_entries++;
}
/* mark entry with initialiser just in case */
lb_map = udf_rw32(0xffffffff);
/* mark entry with non free-space initialiser just in case */
lb_map = udf_rw32(0xfffffffe);
udf_vat_write(ump->vat_node, (uint8_t *) &lb_map, 4,
ump->vat_offset + lb_num *4);
ump->vat_last_free_lb = lb_num;