Imbus/xv6-riscv-kernel
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fix Regehr complaint
This commit is contained in:
Robert Morris 2016-08-08 13:06:38 -04:00
parent 50edfe1412
commit 0a4a4230a3
2 changed files with 8 additions and 4 deletions
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7
vm.c
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@ -237,7 +237,12 @@ allocuvm(pde_t *pgdir, uint oldsz, uint newsz)
return 0;
}
memset(mem, 0, PGSIZE);
mappages(pgdir, (char*)a, PGSIZE, v2p(mem), PTE_W|PTE_U);
if(mappages(pgdir, (char*)a, PGSIZE, v2p(mem), PTE_W|PTE_U) < 0){
cprintf("allocuvm out of memory (2)\n");
deallocuvm(pgdir, newsz, oldsz);
kfree(mem);
return 0;
}
}
return newsz;
}