#5688: instance Read Integer readsPrec out of memory due to exponential notation
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Reporter: gracjan | Owner:
Type: bug | Status: new
Priority: normal | Component: libraries/base
Version: 6.12.3 | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: Runtime crash | Testcase:
Blockedby: | Blocking:
Related: |
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{{{
GHCi, version 6.12.3: http://www.haskell.org/ghc/
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
120000000000
Prelude> read "12e1000000000000" :: Integer
Segmentation fault
}}}
Sometimes it fails with Bus error.
According to Haskell'98 and Haskell'00 Reports Integers should not parse
exponential notation at all.
http://www.haskell.org/onlinereport/haskell2010/haskellch2.html#x7-190002.5
This is security issue in web frameworks as parsing HTTP headers, URLs,
JSON and other may involve parsing integers.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5688>
GHC <http://www.haskell.org/ghc/>
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