Closed
Description
System info
Ubuntu x86_64, clang 6.0, faad (latest master eb19fa)
Configure
CFLAGS="-g -fsanitize=address" LDFLAGS="-fsanitize=address" ./configure --enable-shared=no
Command line
./frontend/faad -w -b 5 @@
AddressSanitizer output
=================================================================
==66437==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fff84ab6078 at pc 0x0000004462d7 bp 0x7fff84ab5ee0 sp 0x7fff84ab5690
READ of size 41 at 0x7fff84ab6078 thread T0
#0 0x4462d6 in printf_common(void*, char const*, __va_list_tag*) (/home/seviezhou/faad2/frontend/faad+0x4462d6)
#1 0x446f1b in __interceptor_vfprintf (/home/seviezhou/faad2/frontend/faad+0x446f1b)
#2 0x446fe6 in fprintf (/home/seviezhou/faad2/frontend/faad+0x446fe6)
#3 0x5150d3 in ftypin /home/seviezhou/faad2/frontend/mp4read.c:141:9
#4 0x5143fd in parse /home/seviezhou/faad2/frontend/mp4read.c:765:19
#5 0x5130f8 in mp4read_open /home/seviezhou/faad2/frontend/mp4read.c:999:9
#6 0x52a3a7 in decodeMP4file /home/seviezhou/faad2/frontend/main.c:830:9
#7 0x52a3a7 in faad_main /home/seviezhou/faad2/frontend/main.c:1323
#8 0x7f9c8fbc2b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
#9 0x41a669 in _start (/home/seviezhou/faad2/frontend/faad+0x41a669)
Address 0x7fff84ab6078 is located in stack of thread T0 at offset 88 in frame
#0 0x514aef in ftypin /home/seviezhou/faad2/frontend/mp4read.c:126
This frame has 2 object(s):
[32, 36) 'u32.i' (line 104)
[48, 88) 'buf' (line 128) <== Memory access at offset 88 overflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow (/home/seviezhou/faad2/frontend/faad+0x4462d6) in printf_common(void*, char const*, __va_list_tag*)
Shadow bytes around the buggy address:
0x10007094ebb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10007094ebc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10007094ebd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10007094ebe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10007094ebf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x10007094ec00: 00 00 00 00 f1 f1 f1 f1 f8 f2 00 00 00 00 00[f3]
0x10007094ec10: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
0x10007094ec20: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f8 f2 f8 f2
0x10007094ec30: f8 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
0x10007094ec40: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
0x10007094ec50: f8 f2 f2 f2 04 f3 f3 f3 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==66437==ABORTING
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