Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
17	108	paramiko.packet.Packetizer._build_packet	call site: 00108	paramiko.util.format_binary
6	33	cryptography.hazmat.primitives.ciphers.modes.CBC.__init__	call site: 00033	paramiko.common.byte_chr
5	0	EP	call site: 00000	paramiko.packet.Packetizer.__init__
5	40	paramiko.message.Message.__init__	call site: 00040	paramiko.message.Message.add
3	133	paramiko.packet.Packetizer.write_all	call site: 00133	paramiko.packet.first_arg
3	138	paramiko.packet.Packetizer.send_message	call site: 00138	paramiko.packet.Packetizer._log
2	68	paramiko.util.b	call site: 00068	paramiko.message.Message.asbytes
1	10	paramiko.packet.Packetizer.__init__	call site: 00010	cryptography.hazmat.primitives.ciphers.base.Cipher.__init__
1	19	cryptography.hazmat.primitives.ciphers.modes._check_iv_length	call site: 00019	cryptography.hazmat.primitives.ciphers.base.Cipher.encryptor
1	60	paramiko.common.byte_ord	call site: 00060	.ord
1	71	paramiko.message.Message.asbytes	call site: 00071	base64.encodebytes.asbytes

Fuzzer calltree


         ...paramiko.tests.fuzz_packetizer.TestOneInput

[function] [call site] 00000


           atheris.FuzzedDataProvider

[function] [call site] 00001


           _loop.LoopSocket

[function] [call site] 00002


           _loop.LoopSocket

[function] [call site] 00003


           _loop.LoopSocket.link

[function] [call site] 00004


           paramiko.packet.Packetizer.__init__

[function] [call site] 00005


             <builtin>.bytes

[function] [call site] 00006


             <builtin>.bytes

[function] [call site] 00007


             <builtin>.bytes

[function] [call site] 00008


             threading.RLock

[function] [call site] 00009


             time.time

[function] [call site] 00010


           cryptography.hazmat.primitives.ciphers.base.Cipher.__init__

[function] [call site] 00011


             <builtin>.isinstance

[function] [call site] 00012


             <builtin>.isinstance

[function] [call site] 00013


             cryptography.hazmat.primitives.ciphers.modes._check_aes_key_length

[function] [call site] 00014


             cryptography.hazmat.primitives.ciphers.modes._check_iv_and_key_length

[function] [call site] 00015


               <builtin>.isinstance

[function] [call site] 00016


               cryptography.hazmat.primitives.ciphers.modes._check_aes_key_length

[function] [call site] 00017


               cryptography.hazmat.primitives.ciphers.modes._check_iv_length

[function] [call site] 00018


                 <builtin>.len

[function] [call site] 00019


           cryptography.hazmat.primitives.ciphers.base.Cipher.encryptor

[function] [call site] 00020


             <builtin>.isinstance

[function] [call site] 00021


             cryptography.hazmat.bindings._rust.openssl.ciphers.create_encryption_ctx

[function] [call site] 00022


           cryptography.hazmat.primitives.ciphers.algorithms.AES.__init__

[function] [call site] 00023


             cryptography.hazmat.primitives._cipheralgorithm._verify_key_size

[function] [call site] 00024


               cryptography.utils._check_byteslike

[function] [call site] 00025


                 <builtin>.memoryview

[function] [call site] 00026


               <builtin>.len

[function] [call site] 00027


           fdp.ConsumeIntInRange

[function] [call site] 00028


           paramiko.common.byte_chr

[function] [call site] 00029


             <builtin>.isinstance

[function] [call site] 00030


             struct.pack

[function] [call site] 00031


           cryptography.hazmat.primitives.ciphers.modes.CBC.__init__

[function] [call site] 00032


             cryptography.utils._check_byteslike

[function] [call site] 00033


           cryptography.hazmat.backends.default_backend

[function] [call site] 00034


           paramiko.packet.Packetizer.set_outbound_cipher

[function] [call site] 00035


           fdp.ConsumeIntInRange

[function] [call site] 00036


           paramiko.common.byte_chr

[function] [call site] 00037


           paramiko.message.Message.__init__

[function] [call site] 00038


             io.BytesIO

[function] [call site] 00039


             io.BytesIO

[function] [call site] 00040


           fdp.ConsumeIntInRange

[function] [call site] 00041


           <builtin>.range

[function] [call site] 00042


           fdp.ConsumeIntInRange

[function] [call site] 00043


           fdp.ConsumeUnicodeNoSurrogates

[function] [call site] 00044


           paramiko.message.Message.add

[function] [call site] 00045


             paramiko.message.Message._add

[function] [call site] 00046


               <builtin>.type

[function] [call site] 00047


               paramiko.message.Message.add_boolean

[function] [call site] 00048


                 io.BytesIO.write

[function] [call site] 00049


                 io.BytesIO.write

[function] [call site] 00050


               <builtin>.isinstance

[function] [call site] 00051


               paramiko.message.Message.add_adaptive_int

[function] [call site] 00052


                 io.BytesIO.write

[function] [call site] 00053


                 paramiko.util.deflate_long

[function] [call site] 00054


                   <builtin>.bytes

[function] [call site] 00055


                   <builtin>.int

[function] [call site] 00056


                   struct.pack

[function] [call site] 00057


                   <builtin>.enumerate

[function] [call site] 00058


                   paramiko.common.byte_ord

[function] [call site] 00059


                     <builtin>.isinstance

[function] [call site] 00060


                     <builtin>.ord

[function] [call site] 00061


                   paramiko.common.byte_ord

[function] [call site] 00062


                 paramiko.message.Message.add_string

[function] [call site] 00063


                   paramiko.util.asbytes

[function] [call site] 00064


                     paramiko.util.b

[function] [call site] 00065


                       <builtin>.isinstance

[function] [call site] 00066


                       <builtin>.isinstance

[function] [call site] 00067


                       base64.decodebytes.encode

[function] [call site] 00068


                     base64.decodebytes.asbytes

[function] [call site] 00069


                     paramiko.message.Message.asbytes

[function] [call site] 00070


                       io.BytesIO.getvalue

[function] [call site] 00071


                     base64.encodebytes.asbytes

[function] [call site] 00072


                   <builtin>.len

[function] [call site] 00073


                   paramiko.message.Message.add_int

[function] [call site] 00074


                     struct.pack

[function] [call site] 00075


                     io.BytesIO.write

[function] [call site] 00076


                   io.BytesIO.write

[function] [call site] 00077


                 struct.pack

[function] [call site] 00078


                 io.BytesIO.write

[function] [call site] 00079


               <builtin>.type

[function] [call site] 00080


               paramiko.message.Message.add_list

[function] [call site] 00081


                 paramiko.message.Message.add_string

[function] [call site] 00082


               paramiko.message.Message.add_string

[function] [call site] 00083


           fdp.ConsumeIntInRange

[function] [call site] 00084


           paramiko.message.Message.add

[function] [call site] 00085


           fdp.ConsumeBool

[function] [call site] 00086


           paramiko.message.Message.add

[function] [call site] 00087


           <builtin>.list

[function] [call site] 00088


           <builtin>.range

[function] [call site] 00089


           fdp.ConsumeUnicodeNoSurrogates

[function] [call site] 00090


           l1.append

[function] [call site] 00091


           paramiko.message.Message.add

[function] [call site] 00092


           fdp.ConsumeBytes

[function] [call site] 00093


           paramiko.message.Message.add_bytes

[function] [call site] 00094


             io.BytesIO.write

[function] [call site] 00095


           fdp.ConsumeIntInRange

[function] [call site] 00096


           paramiko.common.byte_chr

[function] [call site] 00097


           paramiko.message.Message.add_byte

[function] [call site] 00098


             io.BytesIO.write

[function] [call site] 00099


           paramiko.packet.Packetizer.send_message

[function] [call site] 00100


             paramiko.message.Message.asbytes

[function] [call site] 00101


             paramiko.common.byte_ord

[function] [call site] 00102


             <builtin>.len

[function] [call site] 00103


             paramiko.packet.Packetizer._build_packet

[function] [call site] 00104


               <builtin>.len

[function] [call site] 00105


               <builtin>.len

[function] [call site] 00106


               struct.pack

[function] [call site] 00107


               os.urandom

[function] [call site] 00108


             paramiko.packet.Packetizer._log

[function] [call site] 00109


               <builtin>.type

[function] [call site] 00110


               <builtin>.issubclass

[function] [call site] 00111


             paramiko.util.format_binary

[function] [call site] 00112


               <builtin>.len

[function] [call site] 00113


               paramiko.util.format_binary_line

[function] [call site] 00114


                 paramiko.common.byte_ord

[function] [call site] 00115


                 paramiko.common.byte_ord

[function] [call site] 00116


                 paramiko.common.byte_ord

[function] [call site] 00117


               out.append

[function] [call site] 00118


               <builtin>.len

[function] [call site] 00119


               paramiko.util.format_binary_line

[function] [call site] 00120


               out.append

[function] [call site] 00121


             paramiko.packet.Packetizer._log

[function] [call site] 00122


             paramiko.packet.Packetizer._inc_iv_counter

[function] [call site] 00123


               int.from_bytes

[function] [call site] 00124


               inc_iv_counter.to_bytes

[function] [call site] 00125


             struct.pack

[function] [call site] 00126


             paramiko.packet.compute_hmac

[function] [call site] 00127


               hmac.HMAC

[function] [call site] 00128


               hmac.HMAC.digest

[function] [call site] 00129


             paramiko.packet.Packetizer.write_all

[function] [call site] 00130


               time.time

[function] [call site] 00131


               <builtin>.len

[function] [call site] 00132


               _loop.LoopSocket.send

[function] [call site] 00133


               paramiko.packet.first_arg

[function] [call site] 00134


                 <builtin>.type

[function] [call site] 00135


                 <builtin>.len

[function] [call site] 00136


               <builtin>.len

[function] [call site] 00137


             <builtin>.len

[function] [call site] 00138


             paramiko.packet.Packetizer._log

[function] [call site] 00139


             msg.format

[function] [call site] 00140


             paramiko.packet.Packetizer._trigger_rekey

[function] [call site] 00141


           _loop.LoopSocket.recv

[function] [call site] 00142