Re: Linux 4.19.182

From: Greg Kroah-Hartman
Date: Sat Mar 20 2021 - 07:34:38 EST

diff --git a/Makefile b/Makefile
index 29930269b486..5956638e0f4d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
VERSION = 4
PATCHLEVEL = 19
-SUBLEVEL = 181
+SUBLEVEL = 182
EXTRAVERSION =
NAME = "People's Front"

diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 384c34397619..5f52d6d670e9 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -144,6 +144,9 @@ void __sysreg32_restore_state(struct kvm_vcpu *vcpu);

void __debug_switch_to_guest(struct kvm_vcpu *vcpu);
void __debug_switch_to_host(struct kvm_vcpu *vcpu);
+void __debug_save_host_buffers_nvhe(struct kvm_vcpu *vcpu);
+void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu);
+

void __fpsimd_save_state(struct user_fpsimd_state *fp_regs);
void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs);
diff --git a/arch/arm64/kvm/hyp/debug-sr.c b/arch/arm64/kvm/hyp/debug-sr.c
index 50009766e5e5..3c5414633bb7 100644
--- a/arch/arm64/kvm/hyp/debug-sr.c
+++ b/arch/arm64/kvm/hyp/debug-sr.c
@@ -149,6 +149,21 @@ static void __hyp_text __debug_restore_state(struct kvm_vcpu *vcpu,
write_sysreg(ctxt->sys_regs[MDCCINT_EL1], mdccint_el1);
}

+void __hyp_text __debug_save_host_buffers_nvhe(struct kvm_vcpu *vcpu)
+{
+ /*
+ * Non-VHE: Disable and flush SPE data generation
+ * VHE: The vcpu can run, but it can't hide.
+ */
+ __debug_save_spe_nvhe(&vcpu->arch.host_debug_state.pmscr_el1);
+
+}
+
+void __hyp_text __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu)
+{
+ __debug_restore_spe_nvhe(vcpu->arch.host_debug_state.pmscr_el1);
+}
+
void __hyp_text __debug_switch_to_guest(struct kvm_vcpu *vcpu)
{
struct kvm_cpu_context *host_ctxt;
@@ -156,13 +171,6 @@ void __hyp_text __debug_switch_to_guest(struct kvm_vcpu *vcpu)
struct kvm_guest_debug_arch *host_dbg;
struct kvm_guest_debug_arch *guest_dbg;

- /*
- * Non-VHE: Disable and flush SPE data generation
- * VHE: The vcpu can run, but it can't hide.
- */
- if (!has_vhe())
- __debug_save_spe_nvhe(&vcpu->arch.host_debug_state.pmscr_el1);
-
if (!(vcpu->arch.flags & KVM_ARM64_DEBUG_DIRTY))
return;

@@ -182,8 +190,6 @@ void __hyp_text __debug_switch_to_host(struct kvm_vcpu *vcpu)
struct kvm_guest_debug_arch *host_dbg;
struct kvm_guest_debug_arch *guest_dbg;

- if (!has_vhe())
- __debug_restore_spe_nvhe(vcpu->arch.host_debug_state.pmscr_el1);

if (!(vcpu->arch.flags & KVM_ARM64_DEBUG_DIRTY))
return;
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 15312e429b7d..1d16ce0b7e0d 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c
@@ -560,6 +560,7 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
guest_ctxt = &vcpu->arch.ctxt;

__sysreg_save_state_nvhe(host_ctxt);
+ __debug_save_host_buffers_nvhe(vcpu);

__activate_traps(vcpu);
__activate_vm(kern_hyp_va(vcpu->kvm));
@@ -599,11 +600,12 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED)
__fpsimd_save_fpexc32(vcpu);

+ __debug_switch_to_host(vcpu);
/*
* This must come after restoring the host sysregs, since a non-VHE
* system may enable SPE here and make use of the TTBRs.
*/
- __debug_switch_to_host(vcpu);
+ __debug_restore_host_buffers_nvhe(vcpu);

return exit_code;
}
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 335ce1e84904..7eaeab65d39f 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -507,12 +507,27 @@ void b53_imp_vlan_setup(struct dsa_switch *ds, int cpu_port)
}
EXPORT_SYMBOL(b53_imp_vlan_setup);

+static void b53_port_set_learning(struct b53_device *dev, int port,
+ bool learning)
+{
+ u16 reg;
+
+ b53_read16(dev, B53_CTRL_PAGE, B53_DIS_LEARNING, &reg);
+ if (learning)
+ reg &= ~BIT(port);
+ else
+ reg |= BIT(port);
+ b53_write16(dev, B53_CTRL_PAGE, B53_DIS_LEARNING, reg);
+}
+
int b53_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy)
{
struct b53_device *dev = ds->priv;
unsigned int cpu_port = ds->ports[port].cpu_dp->index;
u16 pvlan;

+ b53_port_set_learning(dev, port, false);
+
/* Clear the Rx and Tx disable bits and set to no spanning tree */
b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), 0);

@@ -620,6 +635,7 @@ static void b53_enable_cpu_port(struct b53_device *dev, int port)
b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), port_ctrl);

b53_brcm_hdr_setup(dev->ds, port);
+ b53_port_set_learning(dev, port, false);
}

static void b53_enable_mib(struct b53_device *dev)
@@ -1517,6 +1533,8 @@ int b53_br_join(struct dsa_switch *ds, int port, struct net_device *br)
b53_write16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(port), pvlan);
dev->ports[port].vlan_ctl_mask = pvlan;

+ b53_port_set_learning(dev, port, true);
+
return 0;
}
EXPORT_SYMBOL(b53_br_join);
@@ -1564,6 +1582,7 @@ void b53_br_leave(struct dsa_switch *ds, int port, struct net_device *br)
vl->untag |= BIT(port) | BIT(cpu_port);
b53_set_vlan_entry(dev, pvid, vl);
}
+ b53_port_set_learning(dev, port, false);
}
EXPORT_SYMBOL(b53_br_leave);

diff --git a/drivers/net/dsa/b53/b53_regs.h b/drivers/net/dsa/b53/b53_regs.h
index c90985c294a2..b2c539a42154 100644
--- a/drivers/net/dsa/b53/b53_regs.h
+++ b/drivers/net/dsa/b53/b53_regs.h
@@ -115,6 +115,7 @@
#define B53_UC_FLOOD_MASK 0x32
#define B53_MC_FLOOD_MASK 0x34
#define B53_IPMC_FLOOD_MASK 0x36
+#define B53_DIS_LEARNING 0x3c

/*
* Override Ports 0-7 State on devices with xMII interfaces (8 bit)
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 613f03f9d9ec..e9fe3897bd9c 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -173,11 +173,6 @@ static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
reg &= ~P_TXQ_PSM_VDD(port);
core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);

- /* Enable learning */
- reg = core_readl(priv, CORE_DIS_LEARN);
- reg &= ~BIT(port);
- core_writel(priv, reg, CORE_DIS_LEARN);
-
/* Enable Broadcom tags for that port if requested */
if (priv->brcm_tag_mask & BIT(port))
b53_brcm_hdr_setup(ds, port);
diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index f22a89cdb407..1ea8fc9ff048 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -24,6 +24,7 @@ struct ext4_system_zone {
struct rb_node node;
ext4_fsblk_t start_blk;
unsigned int count;
+ u32 ino;
};

static struct kmem_cache *ext4_system_zone_cachep;
@@ -45,7 +46,8 @@ void ext4_exit_system_zone(void)
static inline int can_merge(struct ext4_system_zone *entry1,
struct ext4_system_zone *entry2)
{
- if ((entry1->start_blk + entry1->count) == entry2->start_blk)
+ if ((entry1->start_blk + entry1->count) == entry2->start_blk &&
+ entry1->ino == entry2->ino)
return 1;
return 0;
}
@@ -66,7 +68,7 @@ static void release_system_zone(struct ext4_system_blocks *system_blks)
*/
static int add_system_zone(struct ext4_system_blocks *system_blks,
ext4_fsblk_t start_blk,
- unsigned int count)
+ unsigned int count, u32 ino)
{
struct ext4_system_zone *new_entry, *entry;
struct rb_node **n = &system_blks->root.rb_node, *node;
@@ -89,6 +91,7 @@ static int add_system_zone(struct ext4_system_blocks *system_blks,
return -ENOMEM;
new_entry->start_blk = start_blk;
new_entry->count = count;
+ new_entry->ino = ino;
new_node = &new_entry->node;

rb_link_node(new_node, parent, n);
@@ -145,7 +148,7 @@ static void debug_print_tree(struct ext4_sb_info *sbi)
static int ext4_data_block_valid_rcu(struct ext4_sb_info *sbi,
struct ext4_system_blocks *system_blks,
ext4_fsblk_t start_blk,
- unsigned int count)
+ unsigned int count, ino_t ino)
{
struct ext4_system_zone *entry;
struct rb_node *n;
@@ -169,7 +172,7 @@ static int ext4_data_block_valid_rcu(struct ext4_sb_info *sbi,
n = n->rb_right;
else {
sbi->s_es->s_last_error_block = cpu_to_le64(start_blk);
- return 0;
+ return entry->ino == ino;
}
}
return 1;
@@ -204,17 +207,16 @@ static int ext4_protect_reserved_inode(struct super_block *sb,
if (n == 0) {
i++;
} else {
- if (!ext4_data_block_valid_rcu(sbi, system_blks,
- map.m_pblk, n)) {
- ext4_error(sb, "blocks %llu-%llu from inode %u "
+ err = add_system_zone(system_blks, map.m_pblk, n, ino);
+ if (err < 0) {
+ if (err == -EFSCORRUPTED) {
+ ext4_error(sb,
+ "blocks %llu-%llu from inode %u "
"overlap system zone", map.m_pblk,
map.m_pblk + map.m_len - 1, ino);
- err = -EFSCORRUPTED;
+ }
break;
}
- err = add_system_zone(system_blks, map.m_pblk, n);
- if (err < 0)
- break;
i += n;
}
}
@@ -259,19 +261,19 @@ int ext4_setup_system_zone(struct super_block *sb)
((i < 5) || ((i % flex_size) == 0)))
add_system_zone(system_blks,
ext4_group_first_block_no(sb, i),
- ext4_bg_num_gdb(sb, i) + 1);
+ ext4_bg_num_gdb(sb, i) + 1, 0);
gdp = ext4_get_group_desc(sb, i, NULL);
ret = add_system_zone(system_blks,
- ext4_block_bitmap(sb, gdp), 1);
+ ext4_block_bitmap(sb, gdp), 1, 0);
if (ret)
goto err;
ret = add_system_zone(system_blks,
- ext4_inode_bitmap(sb, gdp), 1);
+ ext4_inode_bitmap(sb, gdp), 1, 0);
if (ret)
goto err;
ret = add_system_zone(system_blks,
ext4_inode_table(sb, gdp),
- sbi->s_itb_per_group);
+ sbi->s_itb_per_group, 0);
if (ret)
goto err;
}
@@ -320,7 +322,7 @@ void ext4_release_system_zone(struct super_block *sb)
call_rcu(&system_blks->rcu, ext4_destroy_system_zone);
}

-int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk,
+int ext4_inode_block_valid(struct inode *inode, ext4_fsblk_t start_blk,
unsigned int count)
{
struct ext4_system_blocks *system_blks;
@@ -332,9 +334,9 @@ int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk,
* mount option.
*/
rcu_read_lock();
- system_blks = rcu_dereference(sbi->system_blks);
- ret = ext4_data_block_valid_rcu(sbi, system_blks, start_blk,
- count);
+ system_blks = rcu_dereference(EXT4_SB(inode->i_sb)->system_blks);
+ ret = ext4_data_block_valid_rcu(EXT4_SB(inode->i_sb), system_blks,
+ start_blk, count, inode->i_ino);
rcu_read_unlock();
return ret;
}
@@ -354,8 +356,7 @@ int ext4_check_blockref(const char *function, unsigned int line,
while (bref < p+max) {
blk = le32_to_cpu(*bref++);
if (blk &&
- unlikely(!ext4_data_block_valid(EXT4_SB(inode->i_sb),
- blk, 1))) {
+ unlikely(!ext4_inode_block_valid(inode, blk, 1))) {
es->s_last_error_block = cpu_to_le64(blk);
ext4_error_inode(inode, function, line, blk,
"invalid block");
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index a436307eed00..6938dff9f04b 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -3180,9 +3180,9 @@ extern void ext4_release_system_zone(struct super_block *sb);
extern int ext4_setup_system_zone(struct super_block *sb);
extern int __init ext4_init_system_zone(void);
extern void ext4_exit_system_zone(void);
-extern int ext4_data_block_valid(struct ext4_sb_info *sbi,
- ext4_fsblk_t start_blk,
- unsigned int count);
+extern int ext4_inode_block_valid(struct inode *inode,
+ ext4_fsblk_t start_blk,
+ unsigned int count);
extern int ext4_check_blockref(const char *, unsigned int,
struct inode *, __le32 *, unsigned int);

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 3a4570e37cb0..36708d9d71cb 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -377,7 +377,7 @@ static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext)
*/
if (lblock + len <= lblock)
return 0;
- return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, len);
+ return ext4_inode_block_valid(inode, block, len);
}

static int ext4_valid_extent_idx(struct inode *inode,
@@ -385,7 +385,7 @@ static int ext4_valid_extent_idx(struct inode *inode,
{
ext4_fsblk_t block = ext4_idx_pblock(ext_idx);

- return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, 1);
+ return ext4_inode_block_valid(inode, block, 1);
}

static int ext4_valid_extent_entries(struct inode *inode,
@@ -542,14 +542,10 @@ __read_extent_tree_block(const char *function, unsigned int line,
}
if (buffer_verified(bh) && !(flags & EXT4_EX_FORCE_CACHE))
return bh;
- if (!ext4_has_feature_journal(inode->i_sb) ||
- (inode->i_ino !=
- le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum))) {
- err = __ext4_ext_check(function, line, inode,
- ext_block_hdr(bh), depth, pblk);
- if (err)
- goto errout;
- }
+ err = __ext4_ext_check(function, line, inode,
+ ext_block_hdr(bh), depth, pblk);
+ if (err)
+ goto errout;
set_buffer_verified(bh);
/*
* If this is a leaf block, cache all of its entries
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index e1801b288847..a5442528a60d 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -842,8 +842,7 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode,
else if (ext4_should_journal_data(inode))
flags |= EXT4_FREE_BLOCKS_FORGET;

- if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), block_to_free,
- count)) {
+ if (!ext4_inode_block_valid(inode, block_to_free, count)) {
EXT4_ERROR_INODE(inode, "attempt to clear invalid "
"blocks %llu len %lu",
(unsigned long long) block_to_free, count);
@@ -1005,8 +1004,7 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
if (!nr)
continue; /* A hole */

- if (!ext4_data_block_valid(EXT4_SB(inode->i_sb),
- nr, 1)) {
+ if (!ext4_inode_block_valid(inode, nr, 1)) {
EXT4_ERROR_INODE(inode,
"invalid indirect mapped "
"block %lu (level %d)",
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index edeb837081c8..296ffe92e250 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -421,8 +421,7 @@ static int __check_block_validity(struct inode *inode, const char *func,
(inode->i_ino ==
le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum)))
return 0;
- if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), map->m_pblk,
- map->m_len)) {
+ if (!ext4_inode_block_valid(inode, map->m_pblk, map->m_len)) {
ext4_error_inode(inode, func, line, map->m_pblk,
"lblock %lu mapped to illegal pblock %llu "
"(length %d)", (unsigned long) map->m_lblk,
@@ -5072,7 +5071,7 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,

ret = 0;
if (ei->i_file_acl &&
- !ext4_data_block_valid(EXT4_SB(sb), ei->i_file_acl, 1)) {
+ !ext4_inode_block_valid(inode, ei->i_file_acl, 1)) {
ext4_error_inode(inode, function, line, 0,
"iget: bad extended attribute block %llu",
ei->i_file_acl);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index ec6f65c91d93..db47a06cfb74 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2990,7 +2990,7 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);

len = EXT4_C2B(sbi, ac->ac_b_ex.fe_len);
- if (!ext4_data_block_valid(sbi, block, len)) {
+ if (!ext4_inode_block_valid(ac->ac_inode, block, len)) {
ext4_error(sb, "Allocating blocks %llu-%llu which overlap "
"fs metadata", block, block+len);
/* File system mounted not to panic on error
@@ -4755,7 +4755,7 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,

sbi = EXT4_SB(sb);
if (!(flags & EXT4_FREE_BLOCKS_VALIDATED) &&
- !ext4_data_block_valid(sbi, block, count)) {
+ !ext4_inode_block_valid(inode, block, count)) {
ext4_error(sb, "Freeing blocks not in datazone - "
"block = %llu, count = %lu", block, count);
goto error_return;
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index daf0a9637d73..a0cdb6c4a330 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -2734,24 +2734,29 @@ static int retrieve_ptr_limit(const struct bpf_reg_state *ptr_reg,
{
bool mask_to_left = (opcode == BPF_ADD && off_is_neg) ||
(opcode == BPF_SUB && !off_is_neg);
- u32 off;
+ u32 off, max;

switch (ptr_reg->type) {
case PTR_TO_STACK:
+ /* Offset 0 is out-of-bounds, but acceptable start for the
+ * left direction, see BPF_REG_FP.
+ */
+ max = MAX_BPF_STACK + mask_to_left;
off = ptr_reg->off + ptr_reg->var_off.value;
if (mask_to_left)
*ptr_limit = MAX_BPF_STACK + off;
else
- *ptr_limit = -off;
- return 0;
+ *ptr_limit = -off - 1;
+ return *ptr_limit >= max ? -ERANGE : 0;
case PTR_TO_MAP_VALUE:
+ max = ptr_reg->map_ptr->value_size;
if (mask_to_left) {
*ptr_limit = ptr_reg->umax_value + ptr_reg->off;
} else {
off = ptr_reg->smin_value + ptr_reg->off;
- *ptr_limit = ptr_reg->map_ptr->value_size - off;
+ *ptr_limit = ptr_reg->map_ptr->value_size - off - 1;
}
- return 0;
+ return *ptr_limit >= max ? -ERANGE : 0;
default:
return -EINVAL;
}
@@ -2804,6 +2809,7 @@ static int sanitize_ptr_alu(struct bpf_verifier_env *env,
u32 alu_state, alu_limit;
struct bpf_reg_state tmp;
bool ret;
+ int err;

if (can_skip_alu_sanitation(env, insn))
return 0;
@@ -2819,10 +2825,13 @@ static int sanitize_ptr_alu(struct bpf_verifier_env *env,
alu_state |= ptr_is_dst_reg ?
BPF_ALU_SANITIZE_SRC : BPF_ALU_SANITIZE_DST;

- if (retrieve_ptr_limit(ptr_reg, &alu_limit, opcode, off_is_neg))
- return 0;
- if (update_alu_sanitation_state(aux, alu_state, alu_limit))
- return -EACCES;
+ err = retrieve_ptr_limit(ptr_reg, &alu_limit, opcode, off_is_neg);
+ if (err < 0)
+ return err;
+
+ err = update_alu_sanitation_state(aux, alu_state, alu_limit);
+ if (err < 0)
+ return err;
do_sim:
/* Simulate and find potential out-of-bounds access under
* speculative execution from truncation as a result of
@@ -2920,7 +2929,7 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
case BPF_ADD:
ret = sanitize_ptr_alu(env, insn, ptr_reg, dst_reg, smin_val < 0);
if (ret < 0) {
- verbose(env, "R%d tried to add from different maps or paths\n", dst);
+ verbose(env, "R%d tried to add from different maps, paths, or prohibited types\n", dst);
return ret;
}
/* We can take a fixed offset as long as it doesn't overflow
@@ -2975,7 +2984,7 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
case BPF_SUB:
ret = sanitize_ptr_alu(env, insn, ptr_reg, dst_reg, smin_val < 0);
if (ret < 0) {
- verbose(env, "R%d tried to sub from different maps or paths\n", dst);
+ verbose(env, "R%d tried to sub from different maps, paths, or prohibited types\n", dst);
return ret;
}
if (dst_reg == off_reg) {
@@ -6085,7 +6094,7 @@ static int fixup_bpf_calls(struct bpf_verifier_env *env)
off_reg = issrc ? insn->src_reg : insn->dst_reg;
if (isneg)
*patch++ = BPF_ALU64_IMM(BPF_MUL, off_reg, -1);
- *patch++ = BPF_MOV32_IMM(BPF_REG_AX, aux->alu_limit - 1);
+ *patch++ = BPF_MOV32_IMM(BPF_REG_AX, aux->alu_limit);
*patch++ = BPF_ALU64_REG(BPF_SUB, BPF_REG_AX, off_reg);
*patch++ = BPF_ALU64_REG(BPF_OR, BPF_REG_AX, off_reg);
*patch++ = BPF_ALU64_IMM(BPF_NEG, BPF_REG_AX, 0);
diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c
index 6574425ad94c..1f57dce969f7 100644
--- a/net/dsa/tag_mtk.c
+++ b/net/dsa/tag_mtk.c
@@ -20,6 +20,7 @@
#define MTK_HDR_LEN 4
#define MTK_HDR_XMIT_UNTAGGED 0
#define MTK_HDR_XMIT_TAGGED_TPID_8100 1
+#define MTK_HDR_XMIT_TAGGED_TPID_88A8 2
#define MTK_HDR_RECV_SOURCE_PORT_MASK GENMASK(2, 0)
#define MTK_HDR_XMIT_DP_BIT_MASK GENMASK(5, 0)
#define MTK_HDR_XMIT_SA_DIS BIT(6)
@@ -28,8 +29,8 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
+ u8 xmit_tpid;
u8 *mtk_tag;
- bool is_vlan_skb = true;
unsigned char *dest = eth_hdr(skb)->h_dest;
bool is_multicast_skb = is_multicast_ether_addr(dest) &&
!is_broadcast_ether_addr(dest);
@@ -40,13 +41,20 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
* the both special and VLAN tag at the same time and then look up VLAN
* table with VID.
*/
- if (!skb_vlan_tagged(skb)) {
+ switch (skb->protocol) {
+ case htons(ETH_P_8021Q):
+ xmit_tpid = MTK_HDR_XMIT_TAGGED_TPID_8100;
+ break;
+ case htons(ETH_P_8021AD):
+ xmit_tpid = MTK_HDR_XMIT_TAGGED_TPID_88A8;
+ break;
+ default:
if (skb_cow_head(skb, MTK_HDR_LEN) < 0)
return NULL;

+ xmit_tpid = MTK_HDR_XMIT_UNTAGGED;
skb_push(skb, MTK_HDR_LEN);
memmove(skb->data, skb->data + MTK_HDR_LEN, 2 * ETH_ALEN);
- is_vlan_skb = false;
}

mtk_tag = skb->data + 2 * ETH_ALEN;
@@ -54,8 +62,7 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
/* Mark tag attribute on special tag insertion to notify hardware
* whether that's a combined special tag with 802.1Q header.
*/
- mtk_tag[0] = is_vlan_skb ? MTK_HDR_XMIT_TAGGED_TPID_8100 :
- MTK_HDR_XMIT_UNTAGGED;
+ mtk_tag[0] = xmit_tpid;
mtk_tag[1] = (1 << dp->index) & MTK_HDR_XMIT_DP_BIT_MASK;

/* Disable SA learning for multicast frames */
@@ -63,7 +70,7 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
mtk_tag[1] |= MTK_HDR_XMIT_SA_DIS;

/* Tag control information is kept for 802.1Q */
- if (!is_vlan_skb) {
+ if (xmit_tpid == MTK_HDR_XMIT_UNTAGGED) {
mtk_tag[2] = 0;
mtk_tag[3] = 0;
}