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| author |   beck <beck@openbsd.org> | 2020-09-12 11:57:24 +0000 |
|---|---|---|
| committer | beck <beck@openbsd.org> | 2020-09-12 11:57:24 +0000 |
| commit | 1a5ca5bab76e9bd3994c5815f8058a8b51b4ff59 (patch) | |
| tree | 286c590c8fb11b8d2cadb5bcea04e7158e66ee8f | |
| parent | remove unused include that breaks regress (diff) | |
| download | wireguard-openbsd-1a5ca5bab76e9bd3994c5815f8058a8b51b4ff59.tar.xz wireguard-openbsd-1a5ca5bab76e9bd3994c5815f8058a8b51b4ff59.zip | |
Add a NULL check in bufbackoff so we don't die when passed a NULL pmem range.
Noticed by, and based on a diff from Mike Small <smallm@sdf.org>.
| -rw-r--r-- | sys/kern/vfs_bio.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 3d6d071994f..de41d11ec56 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vfs_bio.c,v 1.201 2020/07/14 06:02:50 beck Exp $ */ +/* $OpenBSD: vfs_bio.c,v 1.202 2020/09/12 11:57:24 beck Exp $ */ /* $NetBSD: vfs_bio.c,v 1.44 1996/06/11 11:15:36 pk Exp $ */ /* @@ -309,7 +309,7 @@ bufbackoff(struct uvm_constraint_range *range, long size) * If we will accept high memory for this backoff * try to steal it from the high memory buffer cache. */ - if (range->ucr_high > dma_constraint.ucr_high) { + if (range != NULL && range->ucr_high > dma_constraint.ucr_high) { struct buf *bp; int64_t start = bcstats.numbufpages, recovered = 0; int s = splbio(); |