emo/hardened_malloc
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136 Commits

Author SHA1 Message Date
Daniel Micay
00915521a3 check canary before zeroing as an optimization 2018-10-28 21:07:35 -04:00
Daniel Micay
4cd61e281d add workaround for bug in Linux MPK implementation 2018-10-23 19:08:33 -04:00
Daniel Micay
299bd6d414 add missing thread unseal / seal for atfork hooks 2018-10-23 16:28:54 -04:00
Daniel Micay
59def67979 add inlined check for -1 with pkey_set 2018-10-23 08:00:34 -04:00
Daniel Micay
0b963078d5 guard metadata with Memory Protection Keys (MPK) 2018-10-23 01:11:31 -04:00
Daniel Micay
ac8c68de53 enable pointer cast warnings 2018-10-21 15:50:26 -04:00
Daniel Micay
9a43302868 add enforce_init call to other realloc code path 2018-10-20 02:27:06 -04:00
Daniel Micay
6a408ad017 add init calls to malloc_enable/malloc_disable 2018-10-19 21:46:36 -04:00
Daniel Micay
f0a6f551eb tweak code style 2018-10-18 19:35:21 -04:00
Daniel Micay
1e03b004f5 move slab_info to main metadata region 2018-10-18 16:01:04 -04:00
Daniel Micay
3f1962dd2b use min macro for realloc copy size 2018-10-18 15:25:14 -04:00
Daniel Micay
fe30f6c2ea delay allocating slab metadata from reservation 2018-10-18 15:20:42 -04:00
Daniel Micay
64e9f6797a use offsetof for allocator_state memory protection 2018-10-16 15:52:41 -04:00
Daniel Micay
67ada4d309 document padding for allocator state 2018-10-15 19:10:36 -04:00
Daniel Micay
1c9e0d88a5 use the initial region table slots again 2018-10-15 15:18:45 -04:00
Daniel Micay
da0df69d22 move region hash tables into main state region 2018-10-15 15:07:59 -04:00
Daniel Micay
1e5dec97e0 move slab allocator state into main state region 2018-10-15 14:58:22 -04:00
Daniel Micay
fde9fc2ece protect region allocator state with random guards 2018-10-14 22:41:17 -04:00
Daniel Micay
da6fd5b5ef move slab allocator state to a dedicated mapping 2018-10-14 22:06:38 -04:00
Daniel Micay
1190966846 rename region_info to region_metadata 2018-10-14 22:06:38 -04:00
Daniel Micay
a083ff79e1 move region allocator state to a dedicated mapping 2018-10-14 22:06:33 -04:00
Daniel Micay
535466fdfd avoid undefined shifts with multi-word bitmaps 2018-10-14 18:58:17 -04:00
Daniel Micay
7798b2693e fix loop exit condition boundary for get_free_slot 2018-10-14 18:49:48 -04:00
Daniel Micay
9ea2fd6667 write_after_free_check only reads data 2018-10-14 18:30:20 -04:00
Daniel Micay
d35674c67e expected_size is not an output parameter 2018-10-14 18:28:01 -04:00
Daniel Micay
4fbfe4d3ec fix canary space reservation for pvalloc 2018-10-14 17:49:36 -04:00
Daniel Micay
f11c448a0d slightly reorganize slab metadata 2018-10-14 15:13:06 -04:00
Daniel Micay
3db3e167ed remove usage of ATOMIC_VAR_INIT 
This was never truly required in practice and has been officially
obsoleted in C17.
 2018-10-13 16:50:49 -04:00
Daniel Micay
65a7014b48 randomize free slabs reuse 2018-10-13 13:57:00 -04:00
Daniel Micay
83df37436d fix usage of pthread_atfork for glibc < 2.28 2018-10-12 16:03:15 -04:00
Daniel Micay
6669166fe9 move memory_unmap outside of lock scope 2018-10-12 15:06:51 -04:00
Daniel Micay
b2007ad3d9 implement randomization for the region quarantine 2018-10-12 15:03:59 -04:00
Daniel Micay
ac2b940f0f fix compatibility with older GCC versions 
Avoid relying on compiler extensions supporting more flexible usage of
constants closer to how it works in C++.
 2018-10-11 18:12:49 -04:00
Daniel Micay
ddcdd9423c make the memory mapping quarantine more efficient 2018-10-09 14:13:59 -04:00
Daniel Micay
5fa6e01929 clearer name for MREMAP_MAYMOVE threshold 2018-10-08 17:18:13 -04:00
Daniel Micay
1a10c17e8b add quarantine for large allocations 2018-10-08 16:14:07 -04:00
Daniel Micay
cc9699f1b4 use multi-word bitmap to support up to 256 slots 2018-10-07 18:50:06 -04:00
Daniel Micay
5e2f03296e remove old debugging code 2018-10-07 16:18:17 -04:00
Daniel Micay
348f9fa557 add configuration for frequency of guard slabs 2018-10-06 15:36:03 -04:00
Daniel Micay
4ee12e64e0 configuration for guard region sizes 2018-10-06 15:17:55 -04:00
Daniel Micay
d18b05eaf4 avoid redundant checks for large realloc 2018-10-06 13:31:16 -04:00
Daniel Micay
eb7ced7781 implement in-place growth of large allocations 2018-10-06 13:24:22 -04:00
Daniel Micay
3dc49f8f73 slightly improve sized deallocation error messages 2018-10-05 01:06:12 -04:00
Daniel Micay
dcd969ae04 use a consistent style for fixed-size int types 
The stdint.h types don't cover 128-bit integers and the underscore makes
them ill suited to usage in function suffixes. Instead, use the common
naming style in the Linux kernel and elsewhere including the ChaCha8
implementation included here.
 2018-10-04 15:17:11 -04:00
Daniel Micay
642eed81c0 allow using larger guards on large allocations 2018-10-04 02:58:24 -04:00
Daniel Micay
5811bd184c avoid unnecessary preprocessor use for canary mask 2018-10-03 17:17:20 -04:00
Daniel Micay
b24569b6ca zero leading byte of canaries 2018-10-03 17:09:57 -04:00
Daniel Micay
cf449b3df4 add sized deallocation support 2018-09-19 13:05:12 -04:00
Daniel Micay
82314f4471 make get_size_info straightforward for zero size 2018-09-11 14:51:36 -04:00
Daniel Micay
7a404ddbf2 optimize size calculation for 16 byte spaced sizes 2018-09-11 14:46:44 -04:00