fs, elf: don't complain MAP_FIXED_NOREPLACE unless -EEXIST error

Commit 4ed2863 ("fs, elf: drop MAP_FIXED usage from elf_map") is printing spurious messages under memory pressure due to map_addr == -ENOMEM. 9794 (a.out): Uhuuh, elf segment at 00007f2e34738000(fffffffffffffff4) requested but the memory is mapped already 14104 (a.out): Uhuuh, elf segment at 00007f34fd76c000(fffffffffffffff4) requested but the memory is mapped already 16843 (a.out): Uhuuh, elf segment at 00007f930ecc7000(fffffffffffffff4) requested but the memory is mapped already Complain only if -EEXIST, and use %px for printing the address. Link: http://lkml.kernel.org/r/[email protected] Fixes: 4ed2863 ("fs, elf: drop MAP_FIXED usage from elf_map") is Signed-off-by: Tetsuo Handa <[email protected]> Acked-by: Michal Hocko <[email protected]> Cc: Andrei Vagin <[email protected]> Cc: Khalid Aziz <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Kees Cook <[email protected]> Cc: Abdul Haleem <[email protected]> Cc: Joel Stanley <[email protected]> Cc: Anshuman Khandual <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mrcsosa · Apr 21, 2018 · d23a61e · d23a61e
1 parent a841aa8
commit d23a61e
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
@@ -377,10 +377,10 @@ static unsigned long elf_map(struct file *filep, unsigned long addr,
 	} else
 		map_addr = vm_mmap(filep, addr, size, prot, type, off);
 
-	if ((type & MAP_FIXED_NOREPLACE) && BAD_ADDR(map_addr))
-		pr_info("%d (%s): Uhuuh, elf segment at %p requested but the memory is mapped already\n",
-				task_pid_nr(current), current->comm,
-				(void *)addr);
+	if ((type & MAP_FIXED_NOREPLACE) &&
+	    PTR_ERR((void *)map_addr) == -EEXIST)
+		pr_info("%d (%s): Uhuuh, elf segment at %px requested but the memory is mapped already\n",
+			task_pid_nr(current), current->comm, (void *)addr);
 
 	return(map_addr);
 }