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Added userptr access check to exchange_registers

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This commit is contained in:
Bahadir Balban
2009-10-18 15:05:56 +03:00
parent 2bd3266498
commit 72af4a843a
1 changed files with 5 additions and 0 deletions
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5
src/api/syscall.c
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@@ -126,6 +126,11 @@ int sys_exchange_registers(struct exregs_data *exregs, l4id_t tid)
int err = 0; int err = 0;
struct ktcb *task; struct ktcb *task;
if ((err = check_access((unsigned long)exregs,
sizeof(*exregs),
MAP_USR_RW_FLAGS, 1)) < 0)
return err;
/* Find tcb from its list */ /* Find tcb from its list */
if (!(task = tcb_find(tid))) if (!(task = tcb_find(tid)))
return -ESRCH; return -ESRCH;