Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Revision 30e769382dfb67a68fe8e6bfe8509addb4aa9514 authored by Miss Islington (bot) on 04 February 2020, 21:41:55 UTC, committed by GitHub on 04 February 2020, 21:41:55 UTC
When called on a closed object, readinto() segfaults on account
of a write to a freed buffer:
==220553== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==220553== Access not within mapped region at address 0x2A
==220553== at 0x48408A0: memmove (vg_replace_strmem.c:1272)
==220553== by 0x58DB0C: _buffered_readinto_generic (bufferedio.c:972)
==220553== by 0x58DCBA: _io__Buffered_readinto_impl (bufferedio.c:1053)
==220553== by 0x58DCBA: _io__Buffered_readinto (bufferedio.c.h:253)
Reproducer:
reader = open ("/dev/zero", "rb")
_void = reader.read (42)
reader.close ()
reader.readinto (bytearray (42)) GH-GH-GH- BANG!
The problem exists since 2012 when commit dc469454ec added code
to free the read buffer on close().
Signed-off-by: Philipp Gesang <philipp.gesang@intra2net.com>
(cherry picked from commit cb1c0746f277052e45a60d6c436a765e34722821)
Co-authored-by: Philipp Gesang <phg@phi-gamma.net> 1 parent 9a740b6
Tip revision: 30e769382dfb67a68fe8e6bfe8509addb4aa9514 authored by Miss Islington (bot) on 04 February 2020, 21:41:55 UTC
closes bpo-39510: Fix use-after-free in BufferedReader.readinto() (GH-18295)
closes bpo-39510: Fix use-after-free in BufferedReader.readinto() (GH-18295)
Tip revision: 30e7693
| File | Mode | Size |
|---|---|---|
| clinic | ||
| stringlib | ||
| README | -rw-r--r-- | 41 bytes |
| abstract.c | -rw-r--r-- | 68.6 KB |
| accu.c | -rw-r--r-- | 2.4 KB |
| boolobject.c | -rw-r--r-- | 6.6 KB |
| bytearrayobject.c | -rw-r--r-- | 70.2 KB |
| bytes_methods.c | -rw-r--r-- | 21.1 KB |
| bytesobject.c | -rw-r--r-- | 99.5 KB |
| call.c | -rw-r--r-- | 36.2 KB |
| capsule.c | -rw-r--r-- | 7.3 KB |
| cellobject.c | -rw-r--r-- | 5.7 KB |
| classobject.c | -rw-r--r-- | 19.2 KB |
| codeobject.c | -rw-r--r-- | 34.3 KB |
| complexobject.c | -rw-r--r-- | 32.1 KB |
| descrobject.c | -rw-r--r-- | 58.3 KB |
| dict-common.h | -rw-r--r-- | 2.2 KB |
| dictnotes.txt | -rw-r--r-- | 6.0 KB |
| dictobject.c | -rw-r--r-- | 138.1 KB |
| enumobject.c | -rw-r--r-- | 13.4 KB |
| exceptions.c | -rw-r--r-- | 87.2 KB |
| fileobject.c | -rw-r--r-- | 16.9 KB |
| floatobject.c | -rw-r--r-- | 70.3 KB |
| frameobject.c | -rw-r--r-- | 33.1 KB |
| funcobject.c | -rw-r--r-- | 31.1 KB |
| genobject.c | -rw-r--r-- | 66.4 KB |
| interpreteridobject.c | -rw-r--r-- | 8.5 KB |
| iterobject.c | -rw-r--r-- | 9.2 KB |
| listobject.c | -rw-r--r-- | 98.1 KB |
| listsort.txt | -rw-r--r-- | 35.3 KB |
| lnotab_notes.txt | -rw-r--r-- | 5.9 KB |
| longobject.c | -rw-r--r-- | 175.3 KB |
| memoryobject.c | -rw-r--r-- | 91.3 KB |
| methodobject.c | -rw-r--r-- | 13.8 KB |
| moduleobject.c | -rw-r--r-- | 24.8 KB |
| namespaceobject.c | -rw-r--r-- | 7.4 KB |
| object.c | -rw-r--r-- | 61.8 KB |
| obmalloc.c | -rw-r--r-- | 86.8 KB |
| odictobject.c | -rw-r--r-- | 73.2 KB |
| picklebufobject.c | -rw-r--r-- | 6.0 KB |
| rangeobject.c | -rw-r--r-- | 34.6 KB |
| setobject.c | -rw-r--r-- | 73.2 KB |
| sliceobject.c | -rw-r--r-- | 19.1 KB |
| structseq.c | -rw-r--r-- | 14.7 KB |
| tupleobject.c | -rw-r--r-- | 31.2 KB |
| typeobject.c | -rw-r--r-- | 243.5 KB |
| typeslots.inc | -rw-r--r-- | 3.9 KB |
| typeslots.py | -rwxr-xr-x | 1.2 KB |
| unicodectype.c | -rw-r--r-- | 7.5 KB |
| unicodeobject.c | -rw-r--r-- | 460.4 KB |
| unicodetype_db.h | -rw-r--r-- | 246.9 KB |
| weakrefobject.c | -rw-r--r-- | 30.8 KB |
Computing file changes ...
