4.20 release is affected too.
On Sun, 2018-12-23 at 20:29 +0500, Ivan Mironov wrote:
> This happened when I tried to boot normal Fedora 29 system with latest
> available kernel (from fedora rawhide, plus some unrelated custom
> patches):
>
> BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000000
> PGD 0 P4D 0
> Oops: 0010 [#1] SMP PTI
> CPU: 6 PID: 1422 Comm: libvirtd Tainted: G I
> 4.20.0-0.rc7.git3.hpsa2.1.fc29.x86_64 #1
> Hardware name: HP ProLiant BL460c G6, BIOS I24 05/21/2018
> RIP: 0010: (null)
> Code: Bad RIP value.
> RSP: 0018:ffffa47ccdc9fbe0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 00000000000003e8 RCX: ffffa47ccdc9fbf8
> RDX: ffffa47ccdc9fc00 RSI: ffff97d9ee7b01f8 RDI: ffff97d9f0150b80
> RBP: ffff97d9f0150b80 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000003
> R13: ffff97d9ef1e53e8 R14: 0000000000000009 R15: ffff97d9f0ac6730
> FS: 00007f4d224ef700(0000) GS:ffff97d9fa200000(0000)
> knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffffffffffffd6 CR3: 00000011ece52006 CR4: 00000000000206e0
> Call Trace:
> ? bnx2x_chip_cleanup+0x195/0x610 [bnx2x]
> ? bnx2x_nic_unload+0x1e2/0x8f0 [bnx2x]
> ? bnx2x_reload_if_running+0x24/0x40 [bnx2x]
> ? bnx2x_set_features+0x79/0xa0 [bnx2x]
> ? __netdev_update_features+0x244/0x9e0
> ? netlink_broadcast_filtered+0x136/0x4b0
> ? netdev_update_features+0x22/0x60
> ? dev_disable_lro+0x1c/0xe0
> ? devinet_sysctl_forward+0x1c6/0x211
> ? proc_sys_call_handler+0xab/0x100
> ? __vfs_write+0x36/0x1a0
> ? rcu_read_lock_sched_held+0x79/0x80
> ? rcu_sync_lockdep_assert+0x2e/0x60
> ? __sb_start_write+0x14c/0x1b0
> ? vfs_write+0x159/0x1c0
> ? vfs_write+0xba/0x1c0
> ? ksys_write+0x52/0xc0
> ? do_syscall_64+0x60/0x1f0
> ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
>
> After some investigation I figured out that recently added cleanup code
> tries to call VLAN filtering de-initialization function which exist only
> for newer hardware. Corresponding function pointer is not
> initialized (== 0) for older hardware, namely these chips:
>
> #define CHIP_NUM_57710 0x164e
> #define CHIP_NUM_57711 0x164f
> #define CHIP_NUM_57711E 0x1650
>
> And I have one of those in my test system:
>
> 02:00.0 Ethernet controller [0200]: Broadcom Inc. and subsidiaries
> NetXtreme II BCM57711E 10-Gigabit PCIe [14e4:1650]
> 02:00.1 Ethernet controller [0200]: Broadcom Inc. and subsidiaries
> NetXtreme II BCM57711E 10-Gigabit PCIe [14e4:1650]
>
> Function bnx2x_init_vlan_mac_fp_objs() from
> drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h decides whether to
> initialize relevant pointers in bnx2x_sp_objs.vlan_obj or not.
>
> This regression was introduced after v4.20-rc7.
>
> Fixes: 04f05230c5c13 ("bnx2x: Remove configured vlans as part of unload
> sequence.")
> Signed-off-by: Ivan Mironov <mironov.i...@gmail.com>
> ---
> .../net/ethernet/broadcom/bnx2x/bnx2x_main.c | 22 +++++++++++++------
> 1 file changed, 15 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
> b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
> index b164f705709d..0e37c2484ac2 100644
> --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
> +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
> @@ -8504,15 +8504,23 @@ int bnx2x_set_vlan_one(struct bnx2x *bp, u16 vlan,
> static int bnx2x_del_all_vlans(struct bnx2x *bp)
> {
> struct bnx2x_vlan_mac_obj *vlan_obj = &bp->sp_objs[0].vlan_obj;
> - unsigned long ramrod_flags = 0, vlan_flags = 0;
> struct bnx2x_vlan_entry *vlan;
> - int rc;
>
> - __set_bit(RAMROD_COMP_WAIT, &ramrod_flags);
> - __set_bit(BNX2X_VLAN, &vlan_flags);
> - rc = vlan_obj->delete_all(bp, vlan_obj, &vlan_flags, &ramrod_flags);
> - if (rc)
> - return rc;
> + /* The whole *vlan_obj structure may be not initialized if VLAN
> + * filtering offload is not supported by hardware. Currently this is
> + * true for all hardware covered by CHIP_IS_E1x().
> + */
> + if (vlan_obj->delete_all) {
> + unsigned long ramrod_flags = 0, vlan_flags = 0;
> + int rc;
> +
> + __set_bit(RAMROD_COMP_WAIT, &ramrod_flags);
> + __set_bit(BNX2X_VLAN, &vlan_flags);
> + rc = vlan_obj->delete_all(bp, vlan_obj, &vlan_flags,
> + &ramrod_flags);
> + if (rc)
> + return rc;
> + }
>
> /* Mark that hw forgot all entries */
> list_for_each_entry(vlan, &bp->vlan_reg, link)
