commit: 849309bfe8d9e7f0a63d0c3439fe87e3e74eb8aa Author: Mike Pagano <mpagano <AT> gentoo <DOT> org> AuthorDate: Wed May 10 17:59:07 2023 +0000 Commit: Mike Pagano <mpagano <AT> gentoo <DOT> org> CommitDate: Wed May 10 17:59:07 2023 +0000 URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=849309bf
netfilter: nf_tables: deactivate anonymous set from preparation phase Bug: https://bugs.gentoo.org/90606 Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org> 0000_README | 4 + ...nf-tables-make-deleted-anon-sets-inactive.patch | 121 +++++++++++++++++++++ 2 files changed, 125 insertions(+) diff --git a/0000_README b/0000_README index 4cf6104f..a4bd25f7 100644 --- a/0000_README +++ b/0000_README @@ -1179,6 +1179,10 @@ Patch: 1510_fs-enable-link-security-restrictions-by-default.patch From: http://sources.debian.net/src/linux/3.16.7-ckt4-3/debian/patches/debian/fs-enable-link-security-restrictions-by-default.patch/ Desc: Enable link security restrictions by default. +Patch: 1520_fs-enable-link-security-restrictions-by-default.patch +From: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=c1592a89942e9678f7d9c8030efa777c0d57edab +Desc: netfilter: nf_tables: deactivate anonymous set from preparation phase + Patch: 1900_fs-increase-BINPRM-BUF-SIZE-to-256.patch From: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/exec.c?id=6eb3c3d0a52dca337e327ae8868ca1f44a712e02 Desc: exec: increase BINPRM_BUF_SIZE to 256 diff --git a/1520_nf-tables-make-deleted-anon-sets-inactive.patch b/1520_nf-tables-make-deleted-anon-sets-inactive.patch new file mode 100644 index 00000000..cd75de5c --- /dev/null +++ b/1520_nf-tables-make-deleted-anon-sets-inactive.patch @@ -0,0 +1,121 @@ +From c1592a89942e9678f7d9c8030efa777c0d57edab Mon Sep 17 00:00:00 2001 +From: Pablo Neira Ayuso <[email protected]> +Date: Tue, 2 May 2023 10:25:24 +0200 +Subject: netfilter: nf_tables: deactivate anonymous set from preparation phase + +Toggle deleted anonymous sets as inactive in the next generation, so +users cannot perform any update on it. Clear the generation bitmask +in case the transaction is aborted. + +The following KASAN splat shows a set element deletion for a bound +anonymous set that has been already removed in the same transaction. + +[ 64.921510] ================================================================== +[ 64.923123] BUG: KASAN: wild-memory-access in nf_tables_commit+0xa24/0x1490 [nf_tables] +[ 64.924745] Write of size 8 at addr dead000000000122 by task test/890 +[ 64.927903] CPU: 3 PID: 890 Comm: test Not tainted 6.3.0+ #253 +[ 64.931120] Call Trace: +[ 64.932699] <TASK> +[ 64.934292] dump_stack_lvl+0x33/0x50 +[ 64.935908] ? nf_tables_commit+0xa24/0x1490 [nf_tables] +[ 64.937551] kasan_report+0xda/0x120 +[ 64.939186] ? nf_tables_commit+0xa24/0x1490 [nf_tables] +[ 64.940814] nf_tables_commit+0xa24/0x1490 [nf_tables] +[ 64.942452] ? __kasan_slab_alloc+0x2d/0x60 +[ 64.944070] ? nf_tables_setelem_notify+0x190/0x190 [nf_tables] +[ 64.945710] ? kasan_set_track+0x21/0x30 +[ 64.947323] nfnetlink_rcv_batch+0x709/0xd90 [nfnetlink] +[ 64.948898] ? nfnetlink_rcv_msg+0x480/0x480 [nfnetlink] + +Signed-off-by: Pablo Neira Ayuso <[email protected]> +--- + include/net/netfilter/nf_tables.h | 1 + + net/netfilter/nf_tables_api.c | 12 ++++++++++++ + net/netfilter/nft_dynset.c | 2 +- + net/netfilter/nft_lookup.c | 2 +- + net/netfilter/nft_objref.c | 2 +- + 5 files changed, 16 insertions(+), 3 deletions(-) + +diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h +index 3ed21d2d56590..2e24ea1d744c2 100644 +--- a/include/net/netfilter/nf_tables.h ++++ b/include/net/netfilter/nf_tables.h +@@ -619,6 +619,7 @@ struct nft_set_binding { + }; + + enum nft_trans_phase; ++void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set); + void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, + struct nft_set_binding *binding, + enum nft_trans_phase phase); +diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c +index 8b6c61a2196cb..59fb8320ab4d7 100644 +--- a/net/netfilter/nf_tables_api.c ++++ b/net/netfilter/nf_tables_api.c +@@ -5127,12 +5127,24 @@ static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, + } + } + ++void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set) ++{ ++ if (nft_set_is_anonymous(set)) ++ nft_clear(ctx->net, set); ++ ++ set->use++; ++} ++EXPORT_SYMBOL_GPL(nf_tables_activate_set); ++ + void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, + struct nft_set_binding *binding, + enum nft_trans_phase phase) + { + switch (phase) { + case NFT_TRANS_PREPARE: ++ if (nft_set_is_anonymous(set)) ++ nft_deactivate_next(ctx->net, set); ++ + set->use--; + return; + case NFT_TRANS_ABORT: +diff --git a/net/netfilter/nft_dynset.c b/net/netfilter/nft_dynset.c +index 274579b1696e0..bd19c7aec92ee 100644 +--- a/net/netfilter/nft_dynset.c ++++ b/net/netfilter/nft_dynset.c +@@ -342,7 +342,7 @@ static void nft_dynset_activate(const struct nft_ctx *ctx, + { + struct nft_dynset *priv = nft_expr_priv(expr); + +- priv->set->use++; ++ nf_tables_activate_set(ctx, priv->set); + } + + static void nft_dynset_destroy(const struct nft_ctx *ctx, +diff --git a/net/netfilter/nft_lookup.c b/net/netfilter/nft_lookup.c +index cecf8ab90e58f..03ef4fdaa460b 100644 +--- a/net/netfilter/nft_lookup.c ++++ b/net/netfilter/nft_lookup.c +@@ -167,7 +167,7 @@ static void nft_lookup_activate(const struct nft_ctx *ctx, + { + struct nft_lookup *priv = nft_expr_priv(expr); + +- priv->set->use++; ++ nf_tables_activate_set(ctx, priv->set); + } + + static void nft_lookup_destroy(const struct nft_ctx *ctx, +diff --git a/net/netfilter/nft_objref.c b/net/netfilter/nft_objref.c +index cb37169608bab..a48dd5b5d45b1 100644 +--- a/net/netfilter/nft_objref.c ++++ b/net/netfilter/nft_objref.c +@@ -185,7 +185,7 @@ static void nft_objref_map_activate(const struct nft_ctx *ctx, + { + struct nft_objref_map *priv = nft_expr_priv(expr); + +- priv->set->use++; ++ nf_tables_activate_set(ctx, priv->set); + } + + static void nft_objref_map_destroy(const struct nft_ctx *ctx, +-- +cgit +
