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write access violation with '<button type=radio>' #17

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kcwu opened this issue Aug 17, 2016 · 1 comment

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commented Aug 17, 2016

$ echo '<button type=radio>' |  ./w3m -T text/html -dump
Program received signal SIGSEGV, Segmentation fault.
0x000000000044f19b in formUpdateBuffer (a=0x7d9000, buf=0x7cee00, form=0x7d8f80) at form.c:444
444                 buf->currentLine->lineBuf[spos] = ' ';
(gdb) p buf->currentLine->lineBuf
$1 = 0x495252 ""
(gdb) p spos
$2 = 0
(gdb) info files
....skip some lines...
       0x0000000000490b40 - 0x00000000004a0612 is .rodata

Writing to rodata section and crash.

This is found by afl-fuzz

tats added a commit that referenced this issue Aug 18, 2016

@tats

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commented Aug 18, 2016

Fixed, thank you.

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