SELinux: unrecognized netlink message: protocol=6 nlmsg_type=5249 sclass=netlink_xfrm_socket pid=31684 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=5138 sclass=netlink_xfrm_socket pid=31680 comm=syz-executor.2 INFO: task syz-executor.3:31628 blocked for more than 140 seconds. Not tainted 4.14.198-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28912 31628 6360 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1731 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 ucma_close+0xfc/0x340 drivers/infiniband/core/ucma.c:1749 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4177b1 RSP: 002b:00007ffe948c21b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004177b1 RDX: 0000001b31120000 RSI: 000000000000086e RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000216a486e R09: 00000000216a4872 R10: 00007ffe948c2290 R11: 0000000000000293 R12: ffffffffffffffff R13: 00000000000e97f4 R14: 00000000000003e8 R15: 000000000118bf2c Showing all locks held in the system: 1 lock held by khungtaskd/1067: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1067 Comm: khungtaskd Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2305 Comm: kworker/u4:3 Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy5 ieee80211_iface_work task: ffff8880a34f8280 task.stack: ffff8880a3500000 RIP: 0010:deref_stack_reg+0x36/0x1a0 arch/x86/kernel/unwind_orc.c:292 RSP: 0018:ffff8880a35078a0 EFLAGS: 00000086 RAX: dffffc0000000000 RBX: ffff8880a35078a8 RCX: ffffffff893a0cbe RDX: ffff8880a3507a18 RSI: ffff8880a3507cd8 RDI: ffff8880a35079d8 RBP: ffff8880a3507cd8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880a3507d00 R11: 0000000000000001 R12: ffff8880a35079d8 R13: ffff8880a3507a18 R14: ffff8880a3507a28 R15: ffff8880a35079d8 FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1ede289000 CR3: 00000000948f2000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xfcc/0x17d0 arch/x86/kernel/unwind_orc.c:481 __save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kmem_cache_free+0x7c/0x2b0 mm/slab.c:3758 kfree_skbmem+0x98/0x100 net/core/skbuff.c:586 __kfree_skb net/core/skbuff.c:646 [inline] kfree_skb+0xf4/0x390 net/core/skbuff.c:663 ieee80211_iface_work+0x1d7/0x770 net/mac80211/iface.c:1374 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 56 41 55 49 89 d5 41 54 49 89 fc 55 48 89 f5 53 48 83 ec 48 48 c7 44 24 08 b3 8a b5 41 48 8d 5c 24 08 48 c7 44 24 10 30 d7 88 87 <48> c1 eb 03 48 c7 44 24 18 70 45 28 81 48 8d 14 03 c7 02 f1 f1