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Turns out the DMI addition for iwlwifi is broken (and untested?), since it doesn't properly terminate the scan table. Ensure that we do so. ================================================================== BUG: KASAN: global-out-of-bounds in dmi_check_system+0x5a/0x70 Read of size 1 at addr ffffffffc16af750 by task NetworkManager/1913 CPU: 4 PID: 1913 Comm: NetworkManager Not tainted 5.12.0-rc1+ #10057 Hardware name: LENOVO 20THCTO1WW/20THCTO1WW, BIOS N2VET27W (1.12 ) 12/21/2020 Call Trace: dump_stack+0x90/0xbe print_address_description.constprop.0+0x1d/0x140 ? dmi_check_system+0x5a/0x70 ? dmi_check_system+0x5a/0x70 kasan_report.cold+0x7b/0xd4 ? dmi_check_system+0x5a/0x70 __asan_load1+0x4d/0x50 dmi_check_system+0x5a/0x70 iwl_mvm_up+0x1360/0x1690 [iwlmvm] ? iwl_mvm_send_recovery_cmd+0x270/0x270 [iwlmvm] ? setup_object.isra.0+0x27/0xd0 ? kasan_poison+0x20/0x50 ? ___slab_alloc.constprop.0+0x483/0x5b0 ? mempool_kmalloc+0x17/0x20 ? ftrace_graph_ret_addr+0x2a/0xb0 ? kasan_poison+0x3c/0x50 ? cfg80211_iftype_allowed+0x2e/0x90 [cfg80211] ? __kasan_check_write+0x14/0x20 ? mutex_lock+0x86/0xe0 ? __mutex_lock_slowpath+0x20/0x20 __iwl_mvm_mac_start+0x49/0x290 [iwlmvm] iwl_mvm_mac_start+0x37/0x50 [iwlmvm] drv_start+0x73/0x1b0 [mac80211] ieee80211_do_open+0x53e/0xf10 [mac80211] ? ieee80211_check_concurrent_iface+0x266/0x2e0 [mac80211] ieee80211_open+0xb9/0x100 [mac80211] __dev_open+0x1b8/0x280 ? dev_set_rx_mode+0x40/0x40 __dev_change_flags+0x32f/0x3a0 ? dev_set_allmulti+0x20/0x20 ? is_bpf_text_address+0x24/0x30 ? kernel_text_address+0xbb/0xd0 dev_change_flags+0x63/0xc0 do_setlink+0xb59/0x18c0 ? rtnetlink_put_metrics+0x2e0/0x2e0 ? stack_trace_consume_entry+0x90/0x90 ? if6_seq_show+0xb0/0xb0 ? kasan_save_stack+0x42/0x50 ? kasan_save_stack+0x23/0x50 ? kasan_set_track+0x20/0x30 ? kasan_set_free_info+0x24/0x40 ? __kasan_slab_free+0xea/0x120 ? kfree+0x94/0x250 ? memset+0x3c/0x50 ? __nla_validate_parse+0xc1/0x12d0 ? ____sys_sendmsg+0x430/0x450 ? ___sys_sendmsg+0xf2/0x160 ? __sys_sendmsg+0xc8/0x150 ? __x64_sys_sendmsg+0x48/0x50 ? do_syscall_64+0x32/0x80 ? entry_SYSCALL_64_after_hwframe+0x44/0xae ? nla_get_range_signed+0x1c0/0x1c0 ? nla_put_ifalias+0x86/0xf0 ? __cgroup_bpf_run_filter_skb+0xc1/0x6f0 ? memcpy+0x4e/0x60 ? __kasan_check_read+0x11/0x20 __rtnl_newlink+0x905/0xde0 ? ipv6_dev_get_saddr+0x4c0/0x4c0 ? rtnl_setlink+0x250/0x250 ? ftrace_graph_ret_addr+0x2a/0xb0 ? entry_SYSCALL_64_after_hwframe+0x44/0xae ? bpf_ksym_find+0x94/0xe0 ? __rcu_read_unlock+0x39/0x60 ? is_bpf_text_address+0x24/0x30 ? kernel_text_address+0xbb/0xd0 ? __kernel_text_address+0x12/0x40 ? unwind_get_return_address+0x36/0x50 ? create_prof_cpu_mask+0x30/0x30 ? arch_stack_walk+0x98/0xf0 ? stack_trace_save+0x94/0xc0 ? stack_trace_consume_entry+0x90/0x90 ? arch_stack_walk+0x98/0xf0 ? __kasan_kmalloc+0x81/0xa0 ? kmem_cache_alloc_trace+0xf4/0x220 rtnl_newlink+0x55/0x80 rtnetlink_rcv_msg+0x22f/0x560 ? __kasan_slab_alloc+0x5f/0x80 ? rtnl_calcit.isra.0+0x1e0/0x1e0 ? __x64_sys_sendmsg+0x48/0x50 ? do_syscall_64+0x32/0x80 ? entry_SYSCALL_64_after_hwframe+0x44/0xae ? kernel_text_address+0xbb/0xd0 ? __kernel_text_address+0x12/0x40 ? unwind_get_return_address+0x36/0x50 netlink_rcv_skb+0xe7/0x210 ? rtnl_calcit.isra.0+0x1e0/0x1e0 ? netlink_ack+0x580/0x580 ? netlink_deliver_tap+0x68/0x3d0 rtnetlink_rcv+0x15/0x20 netlink_unicast+0x3a8/0x4f0 ? netlink_attachskb+0x430/0x430 ? __alloc_skb+0xd7/0x1e0 netlink_sendmsg+0x3ff/0x710 ? __rcu_read_unlock+0x39/0x60 ? netlink_unicast+0x4f0/0x4f0 ? iovec_from_user+0x6c/0x170 ? __import_iovec+0x137/0x1c0 ? netlink_unicast+0x4f0/0x4f0 sock_sendmsg+0x74/0x80 ____sys_sendmsg+0x430/0x450 ? kernel_sendmsg+0x40/0x40 ? do_recvmmsg+0x440/0x440 ? kasan_save_stack+0x42/0x50 ? kasan_save_stack+0x23/0x50 ? kasan_record_aux_stack+0xac/0xc0 ? call_rcu+0x5a/0x450 ? __fput+0x1d7/0x3d0 ? ____fput+0xe/0x10 ___sys_sendmsg+0xf2/0x160 ? sendmsg_copy_msghdr+0x120/0x120 ? __kasan_check_write+0x14/0x20 ? _raw_spin_lock+0x82/0xd0 ? _raw_read_lock_irq+0x50/0x50 ? __fget_files+0xce/0x110 ? __fget_light+0x72/0x100 ? __fdget+0x13/0x20 __sys_sendmsg+0xc8/0x150 ? __sys_sendmsg_sock+0x20/0x20 ? __kasan_check_read+0x11/0x20 ? fpregs_assert_state_consistent+0x5a/0x70 __x64_sys_sendmsg+0x48/0x50 do_syscall_64+0x32/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f752cc7312d Code: 28 89 54 24 1c 48 89 74 24 10 89 7c 24 08 e8 ca ee ff ff 8b 54 24 1c 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2f 44 89 c7 48 89 44 24 08 e8 fe ee ff ff 48 RSP: 002b:00007ffd1962bc70 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000055e6574ba880 RCX: 00007f752cc7312d RDX: 0000000000000000 RSI: 00007ffd1962bcc0 RDI: 000000000000000c RBP: 00007ffd1962bcc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000293 R12: 000055e6574ba880 R13: 00007ffd1962be78 R14: 00007ffd1962be6c R15: 0000000000000000 The buggy address belongs to the variable: dmi_ppag_approved_list+0x570/0xffffffffffffde20 [iwlmvm] Memory state around the buggy address: ffffffffc16af600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffffc16af680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffffc16af700: 00 00 00 00 00 00 00 00 f9 f9 f9 f9 00 00 00 01 ^ ffffffffc16af780: f9 f9 f9 f9 00 00 00 00 00 00 02 f9 f9 f9 f9 f9 ffffffffc16af800: 00 00 00 07 f9 f9 f9 f9 00 00 00 00 00 00 00 01 ================================================================== Fixes: a2ac0f48a07c ("iwlwifi: mvm: implement approved list for the PPAG feature") Signed-off-by: Jens Axboe diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c index 15e2773ce7e7..71e5306bd695 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c @@ -1083,6 +1083,7 @@ static const struct dmi_system_id dmi_ppag_approved_list[] = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTek COMPUTER INC."), }, }, + { }, }; static int iwl_mvm_ppag_init(struct iwl_mvm *mvm)