* [PATCH nft] rule: memleak in __do_add_setelems()
@ 2020-04-30 12:18 Pablo Neira Ayuso
2020-04-30 13:08 ` Pablo Neira Ayuso
0 siblings, 1 reply; 6+ messages in thread
From: Pablo Neira Ayuso @ 2020-04-30 12:18 UTC (permalink / raw)
To: netfilter-devel; +Cc: phil
This patch invokes interval_map_decompose() with named sets:
==3402== 2,352 (128 direct, 2,224 indirect) bytes in 1 blocks are definitely lost in loss record 9 of 9
==3402== at 0x483577F: malloc (vg_replace_malloc.c:299)
==3402== by 0x48996A8: xmalloc (utils.c:36)
==3402== by 0x4899778: xzalloc (utils.c:65)
==3402== by 0x487CB46: expr_alloc (expression.c:45)
==3402== by 0x487E2A0: mapping_expr_alloc (expression.c:1140)
==3402== by 0x4898AA8: interval_map_decompose (segtree.c:1095)
==3402== by 0x4872BDF: __do_add_setelems (rule.c:1569)
==3402== by 0x4872BDF: __do_add_setelems (rule.c:1559)
==3402== by 0x4877936: do_command (rule.c:2710)
==3402== by 0x489F1CB: nft_netlink.isra.5 (libnftables.c:42)
==3402== by 0x489FB07: nft_run_cmd_from_filename (libnftables.c:508)
==3402== by 0x10A9AA: main (main.c:455)
Fixes: dd44081d91ce ("segtree: Fix add and delete of element in same batch")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
src/rule.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/rule.c b/src/rule.c
index 633ca13639ad..9e80c0251947 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -1563,7 +1563,8 @@ static int __do_add_setelems(struct netlink_ctx *ctx, struct set *set,
if (mnl_nft_setelem_add(ctx, set, expr, flags) < 0)
return -1;
- if (set->init != NULL &&
+ if (!set_is_anonymous(set->flags) &&
+ set->init != NULL &&
set->flags & NFT_SET_INTERVAL &&
set->desc.field_count <= 1) {
interval_map_decompose(expr);
--
2.20.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH nft] rule: memleak in __do_add_setelems()
2020-04-30 12:18 [PATCH nft] rule: memleak in __do_add_setelems() Pablo Neira Ayuso
@ 2020-04-30 13:08 ` Pablo Neira Ayuso
2020-04-30 13:52 ` Phil Sutter
0 siblings, 1 reply; 6+ messages in thread
From: Pablo Neira Ayuso @ 2020-04-30 13:08 UTC (permalink / raw)
To: netfilter-devel; +Cc: phil
On Thu, Apr 30, 2020 at 02:18:45PM +0200, Pablo Neira Ayuso wrote:
> This patch invokes interval_map_decompose() with named sets:
>
> ==3402== 2,352 (128 direct, 2,224 indirect) bytes in 1 blocks are definitely lost in loss record 9 of 9
> ==3402== at 0x483577F: malloc (vg_replace_malloc.c:299)
> ==3402== by 0x48996A8: xmalloc (utils.c:36)
> ==3402== by 0x4899778: xzalloc (utils.c:65)
> ==3402== by 0x487CB46: expr_alloc (expression.c:45)
> ==3402== by 0x487E2A0: mapping_expr_alloc (expression.c:1140)
> ==3402== by 0x4898AA8: interval_map_decompose (segtree.c:1095)
> ==3402== by 0x4872BDF: __do_add_setelems (rule.c:1569)
> ==3402== by 0x4872BDF: __do_add_setelems (rule.c:1559)
> ==3402== by 0x4877936: do_command (rule.c:2710)
> ==3402== by 0x489F1CB: nft_netlink.isra.5 (libnftables.c:42)
> ==3402== by 0x489FB07: nft_run_cmd_from_filename (libnftables.c:508)
> ==3402== by 0x10A9AA: main (main.c:455)
>
> Fixes: dd44081d91ce ("segtree: Fix add and delete of element in same batch")
This fixes the problem for anonymous sets, still named sets are
showing a memleak.
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH nft] rule: memleak in __do_add_setelems()
2020-04-30 13:08 ` Pablo Neira Ayuso
@ 2020-04-30 13:52 ` Phil Sutter
2020-04-30 14:47 ` Pablo Neira Ayuso
0 siblings, 1 reply; 6+ messages in thread
From: Phil Sutter @ 2020-04-30 13:52 UTC (permalink / raw)
To: Pablo Neira Ayuso; +Cc: netfilter-devel
Hi Pablo,
On Thu, Apr 30, 2020 at 03:08:20PM +0200, Pablo Neira Ayuso wrote:
> On Thu, Apr 30, 2020 at 02:18:45PM +0200, Pablo Neira Ayuso wrote:
> > This patch invokes interval_map_decompose() with named sets:
> >
> > ==3402== 2,352 (128 direct, 2,224 indirect) bytes in 1 blocks are definitely lost in loss record 9 of 9
> > ==3402== at 0x483577F: malloc (vg_replace_malloc.c:299)
> > ==3402== by 0x48996A8: xmalloc (utils.c:36)
> > ==3402== by 0x4899778: xzalloc (utils.c:65)
> > ==3402== by 0x487CB46: expr_alloc (expression.c:45)
> > ==3402== by 0x487E2A0: mapping_expr_alloc (expression.c:1140)
> > ==3402== by 0x4898AA8: interval_map_decompose (segtree.c:1095)
> > ==3402== by 0x4872BDF: __do_add_setelems (rule.c:1569)
> > ==3402== by 0x4872BDF: __do_add_setelems (rule.c:1559)
> > ==3402== by 0x4877936: do_command (rule.c:2710)
> > ==3402== by 0x489F1CB: nft_netlink.isra.5 (libnftables.c:42)
> > ==3402== by 0x489FB07: nft_run_cmd_from_filename (libnftables.c:508)
> > ==3402== by 0x10A9AA: main (main.c:455)
> >
> > Fixes: dd44081d91ce ("segtree: Fix add and delete of element in same batch")
>
> This fixes the problem for anonymous sets, still named sets are
> showing a memleak.
The change is strange: My fix (dd44081d91ce) was about anonymous sets.
Since you make the added code apply to non-anonymous sets only, I would
expect for my testcase to start failing again (I didn't test it,
though).
Are we maybe missing a free() somewhere instead?
Cheers, Phil
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH nft] rule: memleak in __do_add_setelems()
2020-04-30 13:52 ` Phil Sutter
@ 2020-04-30 14:47 ` Pablo Neira Ayuso
2020-04-30 15:41 ` Phil Sutter
0 siblings, 1 reply; 6+ messages in thread
From: Pablo Neira Ayuso @ 2020-04-30 14:47 UTC (permalink / raw)
To: Phil Sutter, netfilter-devel
On Thu, Apr 30, 2020 at 03:52:17PM +0200, Phil Sutter wrote:
> Hi Pablo,
>
> On Thu, Apr 30, 2020 at 03:08:20PM +0200, Pablo Neira Ayuso wrote:
> > On Thu, Apr 30, 2020 at 02:18:45PM +0200, Pablo Neira Ayuso wrote:
> > > This patch invokes interval_map_decompose() with named sets:
> > >
> > > ==3402== 2,352 (128 direct, 2,224 indirect) bytes in 1 blocks are definitely lost in loss record 9 of 9
> > > ==3402== at 0x483577F: malloc (vg_replace_malloc.c:299)
> > > ==3402== by 0x48996A8: xmalloc (utils.c:36)
> > > ==3402== by 0x4899778: xzalloc (utils.c:65)
> > > ==3402== by 0x487CB46: expr_alloc (expression.c:45)
> > > ==3402== by 0x487E2A0: mapping_expr_alloc (expression.c:1140)
> > > ==3402== by 0x4898AA8: interval_map_decompose (segtree.c:1095)
> > > ==3402== by 0x4872BDF: __do_add_setelems (rule.c:1569)
> > > ==3402== by 0x4872BDF: __do_add_setelems (rule.c:1559)
> > > ==3402== by 0x4877936: do_command (rule.c:2710)
> > > ==3402== by 0x489F1CB: nft_netlink.isra.5 (libnftables.c:42)
> > > ==3402== by 0x489FB07: nft_run_cmd_from_filename (libnftables.c:508)
> > > ==3402== by 0x10A9AA: main (main.c:455)
> > >
> > > Fixes: dd44081d91ce ("segtree: Fix add and delete of element in same batch")
> >
> > This fixes the problem for anonymous sets, still named sets are
> > showing a memleak.
>
> The change is strange: My fix (dd44081d91ce) was about anonymous sets.
It was about named sets, right?
# nft 'add element t s { 22-25 }; delete element t s { 22-25 }'
I think the cache update is still not needed for anonymous sets, even
if this was not the right fix indeed.
> Since you make the added code apply to non-anonymous sets only, I would
> expect for my testcase to start failing again (I didn't test it,
> though).
>
> Are we maybe missing a free() somewhere instead?
I think I found the root cause:
https://marc.info/?l=netfilter-devel&m=158825784609307&w=2
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH nft] rule: memleak in __do_add_setelems()
2020-04-30 14:47 ` Pablo Neira Ayuso
@ 2020-04-30 15:41 ` Phil Sutter
2020-04-30 15:46 ` Pablo Neira Ayuso
0 siblings, 1 reply; 6+ messages in thread
From: Phil Sutter @ 2020-04-30 15:41 UTC (permalink / raw)
To: Pablo Neira Ayuso; +Cc: netfilter-devel
On Thu, Apr 30, 2020 at 04:47:14PM +0200, Pablo Neira Ayuso wrote:
> On Thu, Apr 30, 2020 at 03:52:17PM +0200, Phil Sutter wrote:
> > Hi Pablo,
> >
> > On Thu, Apr 30, 2020 at 03:08:20PM +0200, Pablo Neira Ayuso wrote:
> > > On Thu, Apr 30, 2020 at 02:18:45PM +0200, Pablo Neira Ayuso wrote:
> > > > This patch invokes interval_map_decompose() with named sets:
> > > >
> > > > ==3402== 2,352 (128 direct, 2,224 indirect) bytes in 1 blocks are definitely lost in loss record 9 of 9
> > > > ==3402== at 0x483577F: malloc (vg_replace_malloc.c:299)
> > > > ==3402== by 0x48996A8: xmalloc (utils.c:36)
> > > > ==3402== by 0x4899778: xzalloc (utils.c:65)
> > > > ==3402== by 0x487CB46: expr_alloc (expression.c:45)
> > > > ==3402== by 0x487E2A0: mapping_expr_alloc (expression.c:1140)
> > > > ==3402== by 0x4898AA8: interval_map_decompose (segtree.c:1095)
> > > > ==3402== by 0x4872BDF: __do_add_setelems (rule.c:1569)
> > > > ==3402== by 0x4872BDF: __do_add_setelems (rule.c:1559)
> > > > ==3402== by 0x4877936: do_command (rule.c:2710)
> > > > ==3402== by 0x489F1CB: nft_netlink.isra.5 (libnftables.c:42)
> > > > ==3402== by 0x489FB07: nft_run_cmd_from_filename (libnftables.c:508)
> > > > ==3402== by 0x10A9AA: main (main.c:455)
> > > >
> > > > Fixes: dd44081d91ce ("segtree: Fix add and delete of element in same batch")
> > >
> > > This fixes the problem for anonymous sets, still named sets are
> > > showing a memleak.
> >
> > The change is strange: My fix (dd44081d91ce) was about anonymous sets.
>
> It was about named sets, right?
>
> # nft 'add element t s { 22-25 }; delete element t s { 22-25 }'
Oh, hehe. I was staring at exactly that line and concluded it's about
anonymous sets. Maybe I should call it a day. %)
[...]
> I think I found the root cause:
>
> https://marc.info/?l=netfilter-devel&m=158825784609307&w=2
Good catch!
Thanks, Phil
^ permalink raw reply [flat|nested] 6+ messages in thread
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2020-04-30 12:18 [PATCH nft] rule: memleak in __do_add_setelems() Pablo Neira Ayuso
2020-04-30 13:08 ` Pablo Neira Ayuso
2020-04-30 13:52 ` Phil Sutter
2020-04-30 14:47 ` Pablo Neira Ayuso
2020-04-30 15:41 ` Phil Sutter
2020-04-30 15:46 ` Pablo Neira Ayuso
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