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Code Issues Releases Activity

pfctl: pfik_ifp is always NULL

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The pfik_ifp field is not provided by the kernel, it is always NULL. Do not
check for it. This caused us to not clear the skip flag on interfaces, leading
to unexpected behaviour when a 'set skip' was removed.

PR:		280834
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D46311
This commit is contained in:
Kristof Provost 2024-08-16 14:55:31 +02:00
parent d02dcf21ee
commit 6a88e22728
2 changed files with 62 additions and 6 deletions
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7
sbin/pfctl/pfctl.c
View File

@ -394,8 +394,6 @@ pfctl_check_skip_ifaces(char *ifname)
continue;
for (n = h; n != NULL; n = n->next) {
if (p->pfik_ifp == NULL)
continue;
if (strncmp(p->pfik_name, ifname, IFNAMSIZ))
continue;
@ -422,9 +420,6 @@ pfctl_adjust_skip_ifaces(struct pfctl *pf)
for (n = h; n != NULL; n = n->next)
PFRB_FOREACH(pp, &skip_b) {
if (pp->pfik_ifp == NULL)
continue;
if (strncmp(pp->pfik_name, n->ifname, IFNAMSIZ))
continue;
@ -437,7 +432,7 @@ pfctl_adjust_skip_ifaces(struct pfctl *pf)
}
PFRB_FOREACH(p, &skip_b) {
if (p->pfik_ifp == NULL || ! (p->pfik_flags & PFI_IFLAG_SKIP))
if (! (p->pfik_flags & PFI_IFLAG_SKIP))
continue;
pfctl_set_interface_flags(pf, p->pfik_name, PFI_IFLAG_SKIP, 0);

61
tests/sys/netpfil/pf/set_skip.sh
View File

@ -26,6 +26,50 @@
. $(atf_get_srcdir)/utils.subr
atf_test_case "unset" "cleanup"
unset_head()
{
atf_set descr 'Unset set skip test'
atf_set require.user root
}
unset_body()
{
pft_init
vnet_mkjail alcatraz
jexec alcatraz ifconfig lo0 127.0.0.1/8 up
jexec alcatraz pfctl -e
pft_set_rules alcatraz "set skip on lo0" \
"block in proto icmp"
echo "set skip"
jexec alcatraz pfctl -v -sI
jexec alcatraz ifconfig
atf_check -s exit:0 -o ignore jexec alcatraz ping -c 1 127.0.0.1
# Unset the skip on the group
pft_set_rules noflush alcatraz \
"block in proto icmp"
echo "No setskip"
jexec alcatraz pfctl -v -sI
# Do flush states
jexec alcatraz pfctl -Fs
# And now our ping is blocked
atf_check -s exit:2 -o ignore jexec alcatraz ping -c 1 127.0.0.1
jexec alcatraz pfctl -v -sI
}
unset_cleanup()
{
pft_cleanup
}
atf_test_case "set_skip_group" "cleanup"
set_skip_group_head()
{
@ -45,8 +89,24 @@ set_skip_group_body()
pft_set_rules alcatraz "set skip on foo" \
"block in proto icmp"
echo "set skip"
jexec alcatraz pfctl -v -sI
jexec alcatraz ifconfig
atf_check -s exit:0 -o ignore jexec alcatraz ping -c 1 127.0.0.1
# Unset the skip on the group
pft_set_rules noflush alcatraz \
"block in proto icmp"
# Do flush states
jexec alcatraz pfctl -Fs
# And now our ping is blocked
atf_check -s exit:2 -o ignore jexec alcatraz ping -c 1 127.0.0.1
echo "No setskip"
jexec alcatraz pfctl -v -sI
}
set_skip_group_cleanup()
@ -163,6 +223,7 @@ pr255852_cleanup()
atf_init_test_cases()
{
atf_add_test_case "unset"
atf_add_test_case "set_skip_group"
atf_add_test_case "set_skip_group_lo"
atf_add_test_case "set_skip_dynamic"