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| author | MikeCAT <mikecat@users.noreply.github.com> | 2015-12-19 23:43:56 +0900 |
|---|---|---|
| committer | Frans Kaashoek <kaashoek@mit.edu> | 2016-08-25 07:09:10 -0400 |
| commit | 67a7f9597e187dad3dfd9732461fec2de6edbba1 (patch) | |
| tree | 57027bc0645f08c6e7d8dcb789025f892dc9ab69 | |
| parent | a7c03bd91490a10383b7241e41f79e57a09cf212 (diff) | |
| download | xv6-labs-67a7f9597e187dad3dfd9732461fec2de6edbba1.tar.gz xv6-labs-67a7f9597e187dad3dfd9732461fec2de6edbba1.tar.bz2 xv6-labs-67a7f9597e187dad3dfd9732461fec2de6edbba1.zip | |
add alignment check of virtual address to exec()
| -rw-r--r-- | exec.c | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -46,6 +46,8 @@ exec(char *path, char **argv) goto bad; if((sz = allocuvm(pgdir, sz, ph.vaddr + ph.memsz)) == 0) goto bad; + if(ph.vaddr % PGSIZE != 0) + goto bad; if(loaduvm(pgdir, (char*)ph.vaddr, ip, ph.off, ph.filesz) < 0) goto bad; } |