upgrade to fedora-2.6.12-1.1398.FC4 + vserver 2.0.rc7

[linux-2.6.git] / fs / binfmt_aout.c

diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 4cf5d8f..74a8772 100644 (file)
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -51,7 +51,10 @@ static int set_brk(unsigned long start, unsigned long end)
        start = PAGE_ALIGN(start);
        end = PAGE_ALIGN(end);
        if (end > start) {
-               unsigned long addr = do_brk(start, end - start);
+               unsigned long addr;
+               down_write(&current->mm->mmap_sem);
+               addr = do_brk(start, end - start);
+               up_write(&current->mm->mmap_sem);
                if (BAD_ADDR(addr))
                        return addr;
        }
@@ -113,7 +116,7 @@ static int aout_core_dump(long signr, struct pt_regs * regs, struct file *file)
        set_fs(KERNEL_DS);
        has_dumped = 1;
        current->flags |= PF_DUMPCORE;
-               strncpy(dump.u_comm, current->comm, sizeof(current->comm));
+               strncpy(dump.u_comm, current->comm, sizeof(dump.u_comm));
 #ifndef __sparc__
        dump.u_ar0 = (void *)(((unsigned long)(&dump.regs)) - ((unsigned long)(&dump)));
 #endif
@@ -146,14 +149,14 @@ static int aout_core_dump(long signr, struct pt_regs * regs, struct file *file)
 /* make sure we actually have a data and stack area to dump */
        set_fs(USER_DS);
 #ifdef __sparc__
-       if (verify_area(VERIFY_READ, (void __user *)START_DATA(dump), dump.u_dsize))
+       if (!access_ok(VERIFY_READ, (void __user *)START_DATA(dump), dump.u_dsize))
                dump.u_dsize = 0;
-       if (verify_area(VERIFY_READ, (void __user *)START_STACK(dump), dump.u_ssize))
+       if (!access_ok(VERIFY_READ, (void __user *)START_STACK(dump), dump.u_ssize))
                dump.u_ssize = 0;
 #else
-       if (verify_area(VERIFY_READ, (void __user *)START_DATA(dump), dump.u_dsize << PAGE_SHIFT))
+       if (!access_ok(VERIFY_READ, (void __user *)START_DATA(dump), dump.u_dsize << PAGE_SHIFT))
                dump.u_dsize = 0;
-       if (verify_area(VERIFY_READ, (void __user *)START_STACK(dump), dump.u_ssize << PAGE_SHIFT))
+       if (!access_ok(VERIFY_READ, (void __user *)START_STACK(dump), dump.u_ssize << PAGE_SHIFT))
                dump.u_ssize = 0;
 #endif
 
@@ -315,8 +318,7 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                (current->mm->start_brk = N_BSSADDR(ex));
        current->mm->free_area_cache = current->mm->mmap_base;
 
-       // current->mm->rss = 0;
-       vx_rsspages_sub(current->mm, current->mm->rss);
+       set_mm_counter(current->mm, rss, 0);
        current->mm->mmap = NULL;
        compute_creds(bprm);
        current->flags &= ~PF_FORKNOEXEC;
@@ -325,10 +327,14 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                loff_t pos = fd_offset;
                /* Fuck me plenty... */
                /* <AOL></AOL> */
+               down_write(&current->mm->mmap_sem);     
                error = do_brk(N_TXTADDR(ex), ex.a_text);
+               up_write(&current->mm->mmap_sem);
                bprm->file->f_op->read(bprm->file, (char *) N_TXTADDR(ex),
                          ex.a_text, &pos);
+               down_write(&current->mm->mmap_sem);
                error = do_brk(N_DATADDR(ex), ex.a_data);
+               up_write(&current->mm->mmap_sem);
                bprm->file->f_op->read(bprm->file, (char *) N_DATADDR(ex),
                          ex.a_data, &pos);
                goto beyond_if;
@@ -348,8 +354,9 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                pos = 32;
                map_size = ex.a_text+ex.a_data;
 #endif
-
+               down_write(&current->mm->mmap_sem);
                error = do_brk(text_addr & PAGE_MASK, map_size);
+               up_write(&current->mm->mmap_sem);
                if (error != (text_addr & PAGE_MASK)) {
                        send_sig(SIGKILL, current, 0);
                        return error;
@@ -384,7 +391,9 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 
                if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) {
                        loff_t pos = fd_offset;
+                       down_write(&current->mm->mmap_sem);
                        do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+                       up_write(&current->mm->mmap_sem);
                        bprm->file->f_op->read(bprm->file,
                                        (char __user *)N_TXTADDR(ex),
                                        ex.a_text+ex.a_data, &pos);
@@ -426,7 +435,7 @@ beyond_if:
                return retval;
        }
 
-       retval = setup_arg_pages(bprm, EXSTACK_DEFAULT);
+       retval = setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
        if (retval < 0) { 
                /* Someone check-me: is this error path enough? */ 
                send_sig(SIGKILL, current, 0); 
@@ -489,8 +498,9 @@ static int load_aout_library(struct file *file)
                               file->f_dentry->d_name.name);
                        error_time = jiffies;
                }
-
+               down_write(&current->mm->mmap_sem);
                do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
+               up_write(&current->mm->mmap_sem);
                
                file->f_op->read(file, (char __user *)start_addr,
                        ex.a_text + ex.a_data, &pos);
@@ -514,7 +524,9 @@ static int load_aout_library(struct file *file)
        len = PAGE_ALIGN(ex.a_text + ex.a_data);
        bss = ex.a_text + ex.a_data + ex.a_bss;
        if (bss > len) {
+               down_write(&current->mm->mmap_sem);
                error = do_brk(start_addr + len, bss - len);
+               up_write(&current->mm->mmap_sem);
                retval = error;
                if (error != start_addr + len)
                        goto out;