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58 lines
1.9 KiB
58 lines
1.9 KiB
From 6854ec003b42cf02d4b40c0942d49ede9f6d94c0 Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Wed, 19 Feb 2020 12:00:31 +0100
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Subject: [PATCH] src: Fix for reading garbage in nftnl_chain getters
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1758673
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Upstream Status: libnftnl commit 629ee38dca486
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commit 629ee38dca48651bc8c0eedf2f3a0066a6c0aa5b
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Author: Phil Sutter <phil@nwl.cc>
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Date: Fri Feb 14 18:20:29 2020 +0100
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src: Fix for reading garbage in nftnl_chain getters
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In {s,u}{32,64} type getters nftnl_assert() is called to make sure
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returned data length matches expectations. Therefore all attributes must
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set data_len, which NFTNL_CHAIN_DEVICES didn't.
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While being at it, do the same change for NFTNL_FLOWTABLE_DEVICES as
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well to make code a bit more consistent although the problem was fixed
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for flowtables with commit f8eed54150fd4 ("flowtable: Fix for reading
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garbage") already (but in the other direction).
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Fixes: e3ac19b5ec162 ("chain: multi-device support")
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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---
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src/chain.c | 1 +
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src/flowtable.c | 1 +
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2 files changed, 2 insertions(+)
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diff --git a/src/chain.c b/src/chain.c
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index b9a16fc..6e90763 100644
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--- a/src/chain.c
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+++ b/src/chain.c
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@@ -365,6 +365,7 @@ const void *nftnl_chain_get_data(const struct nftnl_chain *c, uint16_t attr,
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*data_len = strlen(c->dev) + 1;
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return c->dev;
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case NFTNL_CHAIN_DEVICES:
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+ *data_len = 0;
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return &c->dev_array[0];
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}
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return NULL;
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diff --git a/src/flowtable.c b/src/flowtable.c
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index 9ba3b6d..bf3e443 100644
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--- a/src/flowtable.c
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+++ b/src/flowtable.c
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@@ -231,6 +231,7 @@ const void *nftnl_flowtable_get_data(const struct nftnl_flowtable *c,
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*data_len = sizeof(int32_t);
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return &c->family;
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case NFTNL_FLOWTABLE_DEVICES:
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+ *data_len = 0;
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return &c->dev_array[0];
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case NFTNL_FLOWTABLE_SIZE:
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*data_len = sizeof(int32_t);
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--
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1.8.3.1
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