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Resolves: #1979814 - df: fix duplicated remote entries due to bind mounts

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This commit is contained in:
Kamil Dudka 2021-07-07 17:59:02 +02:00
parent eb70babab1
commit b21c7b1585
2 changed files with 79 additions and 1 deletions
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72
coreutils-8.32-df-duplicated-entries.patch Normal file
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@ -0,0 +1,72 @@
From 0f053de4bc3ca0cfd88a42d236881dfdddb10ee9 Mon Sep 17 00:00:00 2001
From: Kamil Dudka <kdudka@redhat.com>
Date: Wed, 30 Jun 2021 17:53:22 +0200
Subject: [PATCH] df: fix duplicated remote entries due to bind mounts
As originally reported in <https://bugzilla.redhat.com/1962515>,
df invoked without -a printed duplicated entries for NFS mounts
of bind mounts. This is a regression from commit v8.25-54-g1c17f61ef99,
which introduced the use of a hash table.
The proposed patch makes sure that the devlist entry seen the last time
is used for comparison when eliminating duplicated mount entries. This
way it worked before introducing the hash table.
Patch co-authored by Roberto Bergantinos.
* src/ls.c (struct devlist): Introduce the seen_last pointer.
(devlist_for_dev): Return the devlist entry seen the last time if found.
(filter_mount_list): Remember the devlist entry seen the last time for
each hashed item.
Fixes https://bugs.gnu.org/49298
Upstream-commit: d6125af095c9553f38cba0696f15158f5abe4ecc
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
src/df.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/src/df.c b/src/df.c
index 7e01839..3e9247f 100644
--- a/src/df.c
+++ b/src/df.c
@@ -54,6 +54,7 @@ struct devlist
dev_t dev_num;
struct mount_entry *me;
struct devlist *next;
+ struct devlist *seen_last; /* valid for hashed devlist entries only */
};
/* Filled with device numbers of examined file systems to avoid
@@ -689,7 +690,13 @@ devlist_for_dev (dev_t dev)
return NULL;
struct devlist dev_entry;
dev_entry.dev_num = dev;
- return hash_lookup (devlist_table, &dev_entry);
+
+ struct devlist *found = hash_lookup (devlist_table, &dev_entry);
+ if (found == NULL)
+ return NULL;
+
+ /* Return the last devlist entry we have seen with this dev_num */
+ return found->seen_last;
}
static void
@@ -807,8 +814,12 @@ filter_mount_list (bool devices_only)
devlist->dev_num = buf.st_dev;
devlist->next = device_list;
device_list = devlist;
- if (hash_insert (devlist_table, devlist) == NULL)
+
+ struct devlist *hash_entry = hash_insert (devlist_table, devlist);
+ if (hash_entry == NULL)
xalloc_die ();
+ /* Ensure lookups use this latest devlist. */
+ hash_entry->seen_last = devlist;
me = me->me_next;
}
--
2.31.1

8
coreutils.spec
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@ -1,7 +1,7 @@
Summary: A set of basic GNU tools commonly used in shell scripts
Name: coreutils
Version: 8.32
Release: 29%{?dist}
Release: 30%{?dist}
License: GPLv3+
Url: https://www.gnu.org/software/coreutils/
Source0: https://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz
@ -61,6 +61,9 @@ Patch15: coreutils-8.32-fuse-portal.patch
# tail: fix stack out-of-bounds write with --follow
Patch16: coreutils-8.32-tail-use-poll.patch
# df: fix duplicated remote entries due to bind mounts (#1979814)
Patch17: coreutils-8.32-df-duplicated-entries.patch
# disable the test-lock gnulib test prone to deadlock
Patch100: coreutils-8.26-test-lock.patch
@ -317,6 +320,9 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
%license COPYING
%changelog
* Wed Jul 07 2021 Kamil Dudka <kdudka@redhat.com> - 8.32-30
- df: fix duplicated remote entries due to bind mounts (#1979814)
* Thu Jul 01 2021 Kamil Dudka <kdudka@redhat.com> - 8.32-29
- tail: fix stack out-of-bounds write with --follow (#1976935)