net: hns3: Add vlan filter setting by ethtool command -K

[mirror_ubuntu-bionic-kernel.git] / fs / exec.c

diff --git a/fs/exec.c b/fs/exec.c
index 6be2aa0ab26fe26cb37032b99bba656f8d7c6b51..762874ecf4a8c4a196978b030f28d2df79fd175b 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -63,6 +63,8 @@
 #include <linux/compat.h>
 #include <linux/vmalloc.h>
 
+#include <trace/events/fs.h>
+
 #include <linux/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/tlb.h>
@@ -109,6 +111,14 @@ bool path_noexec(const struct path *path)
        return (path->mnt->mnt_flags & MNT_NOEXEC) ||
               (path->mnt->mnt_sb->s_iflags & SB_I_NOEXEC);
 }
+EXPORT_SYMBOL_GPL(path_noexec);
+
+bool path_nosuid(const struct path *path)
+{
+       return !mnt_may_suid(path->mnt) ||
+              (path->mnt->mnt_sb->s_iflags & SB_I_NOSUID);
+}
+EXPORT_SYMBOL(path_nosuid);
 
 #ifdef CONFIG_USELIB
 /*
@@ -864,6 +874,8 @@ static struct file *do_open_execat(int fd, struct filename *name, int flags)
        if (name->name[0] != '\0')
                fsnotify_open(file);
 
+       trace_open_exec(name->name);
+
 out:
        return file;
 
@@ -1216,15 +1228,14 @@ killed:
        return -EAGAIN;
 }
 
-char *get_task_comm(char *buf, struct task_struct *tsk)
+char *__get_task_comm(char *buf, size_t buf_size, struct task_struct *tsk)
 {
-       /* buf must be at least sizeof(tsk->comm) in size */
        task_lock(tsk);
-       strncpy(buf, tsk->comm, sizeof(tsk->comm));
+       strncpy(buf, tsk->comm, buf_size);
        task_unlock(tsk);
        return buf;
 }
-EXPORT_SYMBOL_GPL(get_task_comm);
+EXPORT_SYMBOL_GPL(__get_task_comm);
 
 /*
  * These functions flushes out all traces of the currently running executable
@@ -1340,24 +1351,24 @@ void setup_new_exec(struct linux_binprm * bprm)
                 * avoid bad behavior from the prior rlimits. This has to
                 * happen before arch_pick_mmap_layout(), which examines
                 * RLIMIT_STACK, but after the point of no return to avoid
-                * races from other threads changing the limits. This also
-                * must be protected from races with prlimit() calls.
+                * needing to clean up the change on failure.
                 */
-               task_lock(current->group_leader);
                if (current->signal->rlim[RLIMIT_STACK].rlim_cur > _STK_LIM)
                        current->signal->rlim[RLIMIT_STACK].rlim_cur = _STK_LIM;
-               if (current->signal->rlim[RLIMIT_STACK].rlim_max > _STK_LIM)
-                       current->signal->rlim[RLIMIT_STACK].rlim_max = _STK_LIM;
-               task_unlock(current->group_leader);
        }
 
        arch_pick_mmap_layout(current->mm);
 
        current->sas_ss_sp = current->sas_ss_size = 0;
 
-       /* Figure out dumpability. */
+       /*
+        * Figure out dumpability. Note that this checking only of current
+        * is wrong, but userspace depends on it. This should be testing
+        * bprm->secureexec instead.
+        */
        if (bprm->interp_flags & BINPRM_FLAGS_ENFORCE_NONDUMP ||
-           bprm->secureexec)
+           !(uid_eq(current_euid(), current_uid()) &&
+             gid_eq(current_egid(), current_gid())))
                set_dumpable(current->mm, suid_dumpable);
        else
                set_dumpable(current->mm, SUID_DUMP_USER);
@@ -1508,7 +1519,7 @@ static void bprm_fill_uid(struct linux_binprm *bprm)
        bprm->cred->euid = current_euid();
        bprm->cred->egid = current_egid();
 
-       if (!mnt_may_suid(bprm->file->f_path.mnt))
+       if (path_nosuid(&bprm->file->f_path))
                return;
 
        if (task_no_new_privs(current))