Date: Sat, 22 May 2021 18:33:47 GMT From: Mateusz Guzik <mjg@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 8b59c6af27d1 - stable/13 - vfs: Fix error handling in vn_fullpath_hardlink() Message-ID: <202105221833.14MIXlRa019456@gitrepo.freebsd.org>
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The branch stable/13 has been updated by mjg: URL: https://cgit.FreeBSD.org/src/commit/?id=8b59c6af27d188f6f32800a34b872c9415533895 commit 8b59c6af27d188f6f32800a34b872c9415533895 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2021-05-11 00:18:00 +0000 Commit: Mateusz Guzik <mjg@FreeBSD.org> CommitDate: 2021-05-22 18:33:16 +0000 vfs: Fix error handling in vn_fullpath_hardlink() vn_fullpath_any_smr() will return a positive error number if the caller-supplied buffer isn't big enough. In this case the error must be propagated up, otherwise we may copy out uninitialized bytes. Reported by: syzkaller+KMSAN Reviewed by: mjg, kib MFC aftr: 3 days Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D30198 (cherry picked from commit c8bbb1272c8bc103cfaa42c7a1639f42b62483dd) --- sys/kern/vfs_cache.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sys/kern/vfs_cache.c b/sys/kern/vfs_cache.c index 2def9900096f..5b978511db17 100644 --- a/sys/kern/vfs_cache.c +++ b/sys/kern/vfs_cache.c @@ -3646,9 +3646,9 @@ vn_fullpath_hardlink(struct nameidata *ndp, char **retbuf, char **freebuf, error = vn_fullpath_dir(vp, pwd->pwd_rdir, buf, retbuf, buflen, addend); pwd_drop(pwd); - if (error != 0) - goto out_bad; } + if (error != 0) + goto out_bad; *freebuf = buf;
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