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| author | MikeCAT <mikecat@users.noreply.github.com> | 2015-12-19 22:52:11 +0900 |
|---|---|---|
| committer | Frans Kaashoek <kaashoek@mit.edu> | 2016-09-26 07:52:17 -0400 |
| commit | 2a675089b129adf442de575617a7e3db5a42a794 (patch) | |
| tree | b6f6b0717aceaf38507aa326d0da63ff8a6896a0 /syscall.c | |
| parent | 0df5f11baef529f32d81bb1b1580264067477a5e (diff) | |
| download | xv6-labs-2a675089b129adf442de575617a7e3db5a42a794.tar.gz xv6-labs-2a675089b129adf442de575617a7e3db5a42a794.tar.bz2 xv6-labs-2a675089b129adf442de575617a7e3db5a42a794.zip | |
fix memory region validation in argptr()
Diffstat (limited to 'syscall.c')
| -rw-r--r-- | syscall.c | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -58,7 +58,7 @@ argptr(int n, char **pp, int size) if(argint(n, &i) < 0) return -1; - if((uint)i >= proc->sz || (uint)i+size > proc->sz) + if(size < 0 || (uint)i >= proc->sz || (uint)i+size > proc->sz) return -1; *pp = (char*)i; return 0; |