diff options
| author | riastradh <riastradh@NetBSD.org> | 2023-04-29 08:13:27 +0000 |
|---|---|---|
| committer | riastradh <riastradh@NetBSD.org> | 2023-04-29 08:13:27 +0000 |
| commit | 2b92ee519d690df802ef2e7f349e90994c83dd81 (patch) | |
| tree | 5fa3a8ab47d4ad56defc0aadc11088faabbab2b6 /sys | |
| parent | f3333f12cb7040ba9cb03fb9be4737d1dda653aa (diff) | |
tmpfs: Refuse sizes that overflow round_page.
Reported-by: syzbot+8dbeee84de15f86df65b@syzkaller.appspotmail.com
https://syzkaller.appspot.com/bug?id=4a27b9fe074f8d4b0afbe22969339b8dfdb157e8
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/fs/tmpfs/tmpfs_subr.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/fs/tmpfs/tmpfs_subr.c b/sys/fs/tmpfs/tmpfs_subr.c index f3fb6a97b75..bda7db3d728 100644 --- a/sys/fs/tmpfs/tmpfs_subr.c +++ b/sys/fs/tmpfs/tmpfs_subr.c @@ -1,4 +1,4 @@ -/* $NetBSD: tmpfs_subr.c,v 1.115 2023/04/29 06:29:55 riastradh Exp $ */ +/* $NetBSD: tmpfs_subr.c,v 1.116 2023/04/29 08:13:27 riastradh Exp $ */ /* * Copyright (c) 2005-2020 The NetBSD Foundation, Inc. @@ -73,7 +73,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: tmpfs_subr.c,v 1.115 2023/04/29 06:29:55 riastradh Exp $"); +__KERNEL_RCSID(0, "$NetBSD: tmpfs_subr.c,v 1.116 2023/04/29 08:13:27 riastradh Exp $"); #include <sys/param.h> #include <sys/cprng.h> @@ -907,6 +907,9 @@ tmpfs_reg_resize(struct vnode *vp, off_t newsize) KASSERT(vp->v_type == VREG); KASSERT(newsize >= 0); + if (newsize > __type_max(off_t) - PAGE_SIZE + 1) + return EFBIG; + oldsize = node->tn_size; oldpages = round_page(oldsize) >> PAGE_SHIFT; newpages = round_page(newsize) >> PAGE_SHIFT; |
