general protection fault, probably for non-canonical address 0xdffffc0000000034: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000001a0-0x00000000000001a7] CPU: 0 PID: 10054 Comm: syz-executor.3 Not tainted 5.11.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ieee80211_multicast_to_unicast net/mac80211/tx.c:4043 [inline] RIP: 0010:ieee80211_subif_start_xmit+0x1e1/0x1270 net/mac80211/tx.c:4127 Code: c1 e8 03 80 3c 08 00 74 08 4c 89 f7 e8 08 b9 87 f8 bb a4 01 00 00 49 03 1e 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <8a> 04 08 84 c0 0f 85 0e 0f 00 00 0f b6 1b 31 ff 89 de e8 28 f5 41 RSP: 0018:ffffc900000072c0 EFLAGS: 00010203 RAX: 0000000000000034 RBX: 00000000000001a4 RCX: dffffc0000000000 RDX: 0000000080000505 RSI: ffffffff8d5255f0 RDI: 0000000000000003 RBP: ffffc90000007470 R08: 0000000000000005 R09: ffffffff893b29b5 R10: 0000000000000002 R11: ffff88801ed61bc0 R12: ffff88801b7f7042 R13: 1ffff92000000e70 R14: ffff888023589710 R15: 1ffff11004192332 FS: 00007fbb3c570700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000074b918 CR3: 000000002bf45000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __netdev_start_xmit include/linux/netdevice.h:4776 [inline] netdev_start_xmit include/linux/netdevice.h:4790 [inline] xmit_one net/core/dev.c:3574 [inline] dev_hard_start_xmit+0x20b/0x450 net/core/dev.c:3590 sch_direct_xmit+0x25e/0xe40 net/sched/sch_generic.c:313 qdisc_restart net/sched/sch_generic.c:376 [inline] __qdisc_run+0xa4d/0x1a90 net/sched/sch_generic.c:384 qdisc_run include/net/pkt_sched.h:136 [inline] __dev_xmit_skb net/core/dev.c:3765 [inline] __dev_queue_xmit+0x11f7/0x2c70 net/core/dev.c:4119 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip6_finish_output2+0xf72/0x13f0 net/ipv6/ip6_output.c:117 dst_output include/net/dst.h:441 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] mld_sendpack+0x769/0xb80 net/ipv6/mcast.c:1679 mld_send_cr net/ipv6/mcast.c:1975 [inline] mld_ifc_timer_expire+0x864/0xc50 net/ipv6/mcast.c:2474 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers+0x6ff/0x910 kernel/time/timer.c:1731 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1744 __do_softirq+0x372/0x7a6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x9a/0xe0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu+0x22c/0x260 kernel/softirq.c:420 irq_exit_rcu+0x5/0x20 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0xe0/0xf0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:__kasan_check_read+0x6/0x10 mm/kasan/shadow.c:30 Code: 0c 31 db 48 c7 c7 a3 a2 ce 8b 4c 89 fe 31 c0 e8 5d 9e a0 ff eb d3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 89 f6 48 8b 0c 24 <31> d2 e9 23 ef ff ff 0f 1f 00 89 f6 48 8b 0c 24 ba 01 00 00 00 e9 RSP: 0018:ffffc90016e8f158 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815fc011 RDX: ffffc9000f86a000 RSI: 0000000000000008 RDI: ffffffff8d739368 RBP: ffffc90016e8f290 R08: ffffffff81d337de R09: ffffed1006187276 R10: ffffed1006187276 R11: 0000000000000000 R12: ffff888030c39318 R13: ffff888030c39420 R14: 1ffff92002dd1e3c R15: dffffc0000000000 instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] cpumask_test_cpu include/linux/cpumask.h:373 [inline] trace_lock_release+0x31/0x140 include/trace/events/lock.h:58 lock_release+0x7d/0x760 kernel/locking/lockdep.c:5448 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:394 [inline] __dentry_kill+0x40a/0x650 fs/dcache.c:577 dentry_kill fs/dcache.c:692 [inline] dput+0x45e/0x6f0 fs/dcache.c:885 find_next_child fs/libfs.c:263 [inline] simple_recursive_removal+0x2b5/0x6d0 fs/libfs.c:278 debugfs_remove+0x45/0x60 fs/debugfs/inode.c:725 ieee80211_debugfs_remove_netdev+0x4d/0xa0 net/mac80211/debugfs_netdev.c:822 ieee80211_teardown_sdata+0x32/0x620 net/mac80211/iface.c:679 ieee80211_runtime_change_iftype net/mac80211/iface.c:1622 [inline] ieee80211_if_change_type+0x397/0xbe0 net/mac80211/iface.c:1656 ieee80211_change_iface+0x29/0x200 net/mac80211/cfg.c:157 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline] cfg80211_change_iface+0x608/0xaa0 net/wireless/util.c:1067 nl80211_set_interface+0x500/0x890 net/wireless/nl80211.c:3839 genl_family_rcv_msg_doit net/netlink/genetlink.c:739 [inline] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0xfb4/0x13c0 net/netlink/genetlink.c:800 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2494 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x7de/0x9b0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0xaa6/0xe90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] __sys_sendto+0x541/0x720 net/socket.c:1975 __do_sys_sendto net/socket.c:1987 [inline] __se_sys_sendto net/socket.c:1983 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:1983 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417c97 Code: 2c 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 81 19 00 00 c3 48 83 ec 08 e8 e7 fa ff ff 48 89 04 24 49 89 ca b8 2c 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 2d fb ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fbb3c56ea80 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fbb3c56ebd0 RCX: 0000000000417c97 RDX: 0000000000000024 RSI: 00007fbb3c56ec20 RDI: 0000000000000009 RBP: 0000000000000000 R08: 00007fbb3c56ea90 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbb3c56ec20 R15: 0000000000000009 Modules linked in: ---[ end trace 45577164f8dff373 ]--- RIP: 0010:ieee80211_multicast_to_unicast net/mac80211/tx.c:4043 [inline] RIP: 0010:ieee80211_subif_start_xmit+0x1e1/0x1270 net/mac80211/tx.c:4127 Code: c1 e8 03 80 3c 08 00 74 08 4c 89 f7 e8 08 b9 87 f8 bb a4 01 00 00 49 03 1e 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <8a> 04 08 84 c0 0f 85 0e 0f 00 00 0f b6 1b 31 ff 89 de e8 28 f5 41 RSP: 0018:ffffc900000072c0 EFLAGS: 00010203 RAX: 0000000000000034 RBX: 00000000000001a4 RCX: dffffc0000000000 RDX: 0000000080000505 RSI: ffffffff8d5255f0 RDI: 0000000000000003 RBP: ffffc90000007470 R08: 0000000000000005 R09: ffffffff893b29b5 R10: 0000000000000002 R11: ffff88801ed61bc0 R12: ffff88801b7f7042 R13: 1ffff92000000e70 R14: ffff888023589710 R15: 1ffff11004192332 FS: 00007fbb3c570700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000074b918 CR3: 000000002bf45000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400