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| author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2021-07-22 13:44:53 -0300 |
|---|---|---|
| committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2021-07-22 13:44:53 -0300 |
| commit | 62fb93442753cbfb828335cd172e71471dffd536 (patch) | |
| tree | a989f061765866aefb7b1ba4724163241edee922 /lvm.c | |
| parent | 8a32e0aa4afdfd575c329ce62baaf7a14888ed3b (diff) | |
| download | lua-62fb93442753cbfb828335cd172e71471dffd536.tar.gz lua-62fb93442753cbfb828335cd172e71471dffd536.tar.bz2 lua-62fb93442753cbfb828335cd172e71471dffd536.zip | |
Bug: Negation in 'luaV_shiftr' may overflow
Negation of an unchecked lua_Integer overflows with mininteger.
Diffstat (limited to 'lvm.c')
| -rw-r--r-- | lvm.c | 2 |
1 files changed, 1 insertions, 1 deletions
| @@ -766,7 +766,7 @@ lua_Number luaV_modf (lua_State *L, lua_Number m, lua_Number n) { | |||
| 766 | /* | 766 | /* |
| 767 | ** Shift left operation. (Shift right just negates 'y'.) | 767 | ** Shift left operation. (Shift right just negates 'y'.) |
| 768 | */ | 768 | */ |
| 769 | #define luaV_shiftr(x,y) luaV_shiftl(x,-(y)) | 769 | #define luaV_shiftr(x,y) luaV_shiftl(x,intop(-, 0, y)) |
| 770 | 770 | ||
| 771 | lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y) { | 771 | lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y) { |
| 772 | if (y < 0) { /* shift right? */ | 772 | if (y < 0) { /* shift right? */ |