[<0>] signalfd_read+0x168/0x1f0
[<0>] vfs_read+0x97/0x190
[<0>] ksys_read+0x5f/0xe0
[<0>] do_syscall_64+0x5c/0x90
[<0>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
