mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 06:09:08 +07:00
26b2f55252
The level of struct nft_ctx is updated by nf_tables_check_loops(). That
is used to validate jumpstack depth. But jumpstack validation routine
doesn't update and validate recursively. So, in some cases, chain depth
can be bigger than the NFT_JUMP_STACK_SIZE.
After this patch, The jumpstack validation routine is located in the
nft_chain_validate(). When new rules or new set elements are added, the
nft_table_validate() is called by the nf_tables_newrule and the
nf_tables_newsetelem. The nft_table_validate() calls the
nft_chain_validate() that visit all their children chains recursively.
So it can update depth of chain certainly.
Reproducer:
%cat ./test.sh
#!/bin/bash
nft add table ip filter
nft add chain ip filter input { type filter hook input priority 0\; }
for ((i=0;i<20;i++)); do
nft add chain ip filter a$i
done
nft add rule ip filter input jump a1
for ((i=0;i<10;i++)); do
nft add rule ip filter a$i jump a$((i+1))
done
for ((i=11;i<19;i++)); do
nft add rule ip filter a$i jump a$((i+1))
done
nft add rule ip filter a10 jump a11
Result:
[ 253.931782] WARNING: CPU: 1 PID: 0 at net/netfilter/nf_tables_core.c:186 nft_do_chain+0xacc/0xdf0 [nf_tables]
[ 253.931915] Modules linked in: nf_tables nfnetlink ip_tables x_tables
[ 253.932153] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.18.0-rc3+ #48
[ 253.932153] RIP: 0010:nft_do_chain+0xacc/0xdf0 [nf_tables]
[ 253.932153] Code: 83 f8 fb 0f 84 c7 00 00 00 e9 d0 00 00 00 83 f8 fd 74 0e 83 f8 ff 0f 84 b4 00 00 00 e9 bd 00 00 00 83 bd 64 fd ff ff 0f 76 09 <0f> 0b 31 c0 e9 bc 02 00 00 44 8b ad 64 fd
[ 253.933807] RSP: 0018:ffff88011b807570 EFLAGS: 00010212
[ 253.933807] RAX: 00000000fffffffd RBX: ffff88011b807660 RCX: 0000000000000000
[ 253.933807] RDX: 0000000000000010 RSI: ffff880112b39d78 RDI: ffff88011b807670
[ 253.933807] RBP: ffff88011b807850 R08: ffffed0023700ece R09: ffffed0023700ecd
[ 253.933807] R10: ffff88011b80766f R11: ffffed0023700ece R12: ffff88011b807898
[ 253.933807] R13: ffff880112b39d80 R14: ffff880112b39d60 R15: dffffc0000000000
[ 253.933807] FS: 0000000000000000(0000) GS:ffff88011b800000(0000) knlGS:0000000000000000
[ 253.933807] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 253.933807] CR2: 00000000014f1008 CR3: 000000006b216000 CR4: 00000000001006e0
[ 253.933807] Call Trace:
[ 253.933807] <IRQ>
[ 253.933807] ? sched_clock_cpu+0x132/0x170
[ 253.933807] ? __nft_trace_packet+0x180/0x180 [nf_tables]
[ 253.933807] ? sched_clock_cpu+0x132/0x170
[ 253.933807] ? debug_show_all_locks+0x290/0x290
[ 253.933807] ? __lock_acquire+0x4835/0x4af0
[ 253.933807] ? inet_ehash_locks_alloc+0x1a0/0x1a0
[ 253.933807] ? unwind_next_frame+0x159e/0x1840
[ 253.933807] ? __read_once_size_nocheck.constprop.4+0x5/0x10
[ 253.933807] ? nft_do_chain_ipv4+0x197/0x1e0 [nf_tables]
[ 253.933807] ? nft_do_chain+0x5/0xdf0 [nf_tables]
[ 253.933807] nft_do_chain_ipv4+0x197/0x1e0 [nf_tables]
[ 253.933807] ? nft_do_chain_arp+0xb0/0xb0 [nf_tables]
[ 253.933807] ? __lock_is_held+0x9d/0x130
[ 253.933807] nf_hook_slow+0xc4/0x150
[ 253.933807] ip_local_deliver+0x28b/0x380
[ 253.933807] ? ip_call_ra_chain+0x3e0/0x3e0
[ 253.933807] ? ip_rcv_finish+0x1610/0x1610
[ 253.933807] ip_rcv+0xbcc/0xcc0
[ 253.933807] ? debug_show_all_locks+0x290/0x290
[ 253.933807] ? ip_local_deliver+0x380/0x380
[ 253.933807] ? __lock_is_held+0x9d/0x130
[ 253.933807] ? ip_local_deliver+0x380/0x380
[ 253.933807] __netif_receive_skb_core+0x1c9c/0x2240
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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|---|---|---|
| .. | ||
| 6lowpan | ||
| 9p | ||
| 802 | ||
| 8021q | ||
| appletalk | ||
| atm | ||
| ax25 | ||
| batman-adv | ||
| bluetooth | ||
| bpf | ||
| bpfilter | ||
| bridge | ||
| caif | ||
| can | ||
| ceph | ||
| core | ||
| dcb | ||
| dccp | ||
| decnet | ||
| dns_resolver | ||
| dsa | ||
| ethernet | ||
| hsr | ||
| ieee802154 | ||
| ife | ||
| ipv4 | ||
| ipv6 | ||
| iucv | ||
| kcm | ||
| key | ||
| l2tp | ||
| l3mdev | ||
| lapb | ||
| llc | ||
| mac80211 | ||
| mac802154 | ||
| mpls | ||
| ncsi | ||
| netfilter | ||
| netlabel | ||
| netlink | ||
| netrom | ||
| nfc | ||
| nsh | ||
| openvswitch | ||
| packet | ||
| phonet | ||
| psample | ||
| qrtr | ||
| rds | ||
| rfkill | ||
| rose | ||
| rxrpc | ||
| sched | ||
| sctp | ||
| smc | ||
| strparser | ||
| sunrpc | ||
| switchdev | ||
| tipc | ||
| tls | ||
| unix | ||
| vmw_vsock | ||
| wimax | ||
| wireless | ||
| x25 | ||
| xdp | ||
| xfrm | ||
| compat.c | ||
| Kconfig | ||
| Makefile | ||
| socket.c | ||
| sysctl_net.c | ||