!214 sync some patches from upstream
From: @yangl777 Reviewed-by: @zhongxuan2 Signed-off-by: @zhongxuan2
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backport-fix-fd-leak-when-playing-with-netns.patch
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110
backport-fix-fd-leak-when-playing-with-netns.patch
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@ -0,0 +1,110 @@
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From 57daf8ff8c6c357a5a083657e5b03d2883cbc4f9 Mon Sep 17 00:00:00 2001
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From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
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Date: Wed, 18 Sep 2024 18:49:41 +0200
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Subject: [PATCH] iplink: fix fd leak when playing with netns
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The command 'ip link set foo netns mynetns' opens a file descriptor to fill
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the netlink attribute IFLA_NET_NS_FD. This file descriptor is never closed.
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When batch mode is used, the number of file descriptor may grow greatly and
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reach the maximum file descriptor number that can be opened.
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This fd can be closed only after the netlink answer. Moreover, a second
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fd could be opened because some (struct link_util)->parse_opt() handlers
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call iplink_parse().
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Let's add a helper to manage these fds:
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- open_fds_add() stores a fd, up to 5 (arbitrary choice, it seems enough);
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- open_fds_close() closes all stored fds.
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Fixes: 0dc34c7713bb ("iproute2: Add processless network namespace support")
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Reported-by: Alexandre Ferrieux <alexandre.ferrieux@orange.com>
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Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
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Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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Reference:https://github.com/iproute2/iproute2/commit/57daf8ff8c6c357a5a083657e5b03d2883cbc4f9
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Conflict:Context adaptation
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---
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include/utils.h | 3 +++
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ip/iplink.c | 6 +++++-
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lib/utils.c | 23 +++++++++++++++++++++++
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3 files changed, 31 insertions(+), 1 deletion(-)
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diff --git a/include/utils.h b/include/utils.h
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index f26ed82..4a08372 100644
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--- a/include/utils.h
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+++ b/include/utils.h
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@@ -390,4 +390,7 @@ int proto_a2n(unsigned short *id, const char *buf,
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const char *proto_n2a(unsigned short id, char *buf, int len,
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const struct proto *proto_tb, size_t tb_len);
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+int open_fds_add(int fd);
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+void open_fds_close(void);
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+
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#endif /* __UTILS_H__ */
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diff --git a/ip/iplink.c b/ip/iplink.c
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index 9a548dd..f7465d1 100644
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--- a/ip/iplink.c
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+++ b/ip/iplink.c
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@@ -675,9 +675,11 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req, char **type)
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if (netns != -1)
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duparg("netns", *argv);
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netns = netns_get_fd(*argv);
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- if (netns >= 0)
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+ if (netns >= 0) {
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+ open_fds_add(netns);
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addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_FD,
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&netns, 4);
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+ }
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else if (get_integer(&netns, *argv, 0) == 0)
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addattr_l(&req->n, sizeof(*req),
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IFLA_NET_NS_PID, &netns, 4);
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@@ -1141,6 +1143,8 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
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else
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ret = rtnl_talk(&rth, &req.n, NULL);
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+ open_fds_close();
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+
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if (ret)
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return -2;
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diff --git a/lib/utils.c b/lib/utils.c
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index 99ba7a2..1f4a498 100644
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--- a/lib/utils.c
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+++ b/lib/utils.c
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@@ -40,6 +40,9 @@ int timestamp_short;
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int pretty;
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const char *_SL_ = "\n";
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+static int open_fds[5];
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+static int open_fds_cnt;
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+
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static int af_byte_len(int af);
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static void print_time(char *buf, int len, __u32 time);
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static void print_time64(char *buf, int len, __s64 time);
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@@ -1970,3 +1973,23 @@ int proto_a2n(unsigned short *id, const char *buf,
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return 0;
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}
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+
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+int open_fds_add(int fd)
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+{
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+ if (open_fds_cnt >= ARRAY_SIZE(open_fds))
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+ return -1;
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+
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+ open_fds[open_fds_cnt++] = fd;
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+ return 0;
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+}
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+
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+
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+void open_fds_close(void)
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+{
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+ int i;
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+
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+ for (i = 0; i < open_fds_cnt; i++)
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+ close(open_fds[i]);
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+
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+ open_fds_cnt = 0;
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+}
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--
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2.43.0
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@ -2,7 +2,7 @@
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Name: iproute
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Version: 6.6.0
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Epoch: 1
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Release: 4
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Release: 5
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Summary: Linux network configuration utilities
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License: GPLv2+ and Public Domain
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URL: https://kernel.org/pub/linux/utils/net/iproute2/
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@ -20,6 +20,7 @@ patch6003: backport-exit-exec-in-child-process-if-setup-fails.patch
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Patch6004: backport-ss-fix-expired-time-format-of-timer.patch
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Patch6005: backport-route-filter-by-interface-on-multipath-routes.patch
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Patch6006: backport-lib-names-check-calloc-return-value-in-db_names_alloc.patch
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Patch6007: backport-fix-fd-leak-when-playing-with-netns.patch
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Patch9000: feature-iproute-add-support-for-ipvlan-l2e-mode.patch
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Patch9001: bugfix-iproute2-cancel-some-test-cases.patch
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@ -97,6 +98,12 @@ install -m 0644 lib/libnetlink.a %{buildroot}%{_libdir}/libnetlink.a
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%{_mandir}/*
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%changelog
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* Thu Apr 17 2025 yanglu <yanglu72@h-partners.com> - 1:6.6.0-5
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- Type:bugfix
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- ID:NA
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- SUG:NA
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- DESC:fix fd leak when playing with netns
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* Thu Feb 13 2025 xinghe <xinghe2@h-partners.com> - 1:6.6.0-4
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- Type:bugfix
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- ID:NA
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