diff options
| author | Jeff Garzik <jeff@garzik.org> | 2006-06-11 23:04:37 -0400 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-06-11 23:04:37 -0400 |
| commit | fec69a97489f961026e24536dbb7b86ac663948c (patch) | |
| tree | 869713470d81ebc261598489a2711960336c7c37 /arch/powerpc/kernel/signal_32.c | |
| parent | 1049cb478783c74ca8c99ef70e7d2bf920b9335b (diff) | |
| parent | 2f9719b61e1fcf7422a016ac4f2420a0cc6ba320 (diff) | |
Merge branch 'upstream-fixes' into upstream
Conflicts:
drivers/scsi/sata_sil24.c
Diffstat (limited to 'arch/powerpc/kernel/signal_32.c')
| -rw-r--r-- | arch/powerpc/kernel/signal_32.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index 01e3c08cb55..8fdeca2d459 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -803,10 +803,13 @@ static int do_setcontext(struct ucontext __user *ucp, struct pt_regs *regs, int if (__get_user(cmcp, &ucp->uc_regs)) return -EFAULT; mcp = (struct mcontext __user *)(u64)cmcp; + /* no need to check access_ok(mcp), since mcp < 4GB */ } #else if (__get_user(mcp, &ucp->uc_regs)) return -EFAULT; + if (!access_ok(VERIFY_READ, mcp, sizeof(*mcp))) + return -EFAULT; #endif restore_sigmask(&set); if (restore_user_regs(regs, mcp, sig)) @@ -908,13 +911,14 @@ int sys_debug_setcontext(struct ucontext __user *ctx, { struct sig_dbg_op op; int i; + unsigned char tmp; unsigned long new_msr = regs->msr; #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE) unsigned long new_dbcr0 = current->thread.dbcr0; #endif for (i=0; i<ndbg; i++) { - if (__copy_from_user(&op, dbg, sizeof(op))) + if (copy_from_user(&op, dbg + i, sizeof(op))) return -EFAULT; switch (op.dbg_type) { case SIG_DBG_SINGLE_STEPPING: @@ -959,6 +963,11 @@ int sys_debug_setcontext(struct ucontext __user *ctx, current->thread.dbcr0 = new_dbcr0; #endif + if (!access_ok(VERIFY_READ, ctx, sizeof(*ctx)) + || __get_user(tmp, (u8 __user *) ctx) + || __get_user(tmp, (u8 __user *) (ctx + 1) - 1)) + return -EFAULT; + /* * If we get a fault copying the context into the kernel's * image of the user's registers, we can't just return -EFAULT |