[merged] elf-free-pt_interp-filename-asap.patch removed from -mm tree

[akpm@xxxxxxxxxxxxxxxxxxxx]

The patch titled
     Subject: fs/binfmt_elf.c: free PT_INTERP filename ASAP
has been removed from the -mm tree.  Its filename was
     elf-free-pt_interp-filename-asap.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: fs/binfmt_elf.c: free PT_INTERP filename ASAP

There is no reason for PT_INTERP filename to linger till the end of
the whole loading process.

Link: http://lkml.kernel.org/r/20190314204953.GD18143@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Nikitas Angelinas <nikitas.angelinas@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Mukesh Ojha <mojha@xxxxxxxxxxxxxx>
[nikitas.angelinas@xxxxxxxxx: fix GPF when dereferencing invalid interpreter]
  Link: http://lkml.kernel.org/r/20190330140032.GA1527@vostro
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 fs/binfmt_elf.c |   20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

--- a/fs/binfmt_elf.c~elf-free-pt_interp-filename-asap
+++ a/fs/binfmt_elf.c
@@ -687,7 +687,6 @@ static int load_elf_binary(struct linux_
 	struct file *interpreter = NULL; /* to shut gcc up */
  	unsigned long load_addr = 0, load_bias = 0;
 	int load_addr_set = 0;
-	char * elf_interpreter = NULL;
 	unsigned long error;
 	struct elf_phdr *elf_ppnt, *elf_phdata, *interp_elf_phdata = NULL;
 	unsigned long elf_bss, elf_brk;
@@ -743,6 +742,7 @@ static int load_elf_binary(struct linux_
 
 	for (i = 0; i < loc->elf_ex.e_phnum; i++) {
 		if (elf_ppnt->p_type == PT_INTERP) {
+			char *elf_interpreter;
 			loff_t pos;
 
 			/* This is the program interpreter used for
@@ -774,9 +774,10 @@ static int load_elf_binary(struct linux_
 				goto out_free_interp;
 
 			interpreter = open_exec(elf_interpreter);
+			kfree(elf_interpreter);
 			retval = PTR_ERR(interpreter);
 			if (IS_ERR(interpreter))
-				goto out_free_interp;
+				goto out_free_ph;
 
 			/*
 			 * If the binary is not readable then enforce
@@ -796,6 +797,10 @@ static int load_elf_binary(struct linux_
 			}
 
 			break;
+
+out_free_interp:
+			kfree(elf_interpreter);
+			goto out_free_ph;
 		}
 		elf_ppnt++;
 	}
@@ -820,7 +825,7 @@ static int load_elf_binary(struct linux_
 		}
 
 	/* Some simple consistency checks for the interpreter */
-	if (elf_interpreter) {
+	if (interpreter) {
 		retval = -ELIBBAD;
 		/* Not an ELF interpreter */
 		if (memcmp(loc->interp_elf_ex.e_ident, ELFMAG, SELFMAG) != 0)
@@ -977,7 +982,7 @@ static int load_elf_binary(struct linux_
 			 * independently randomized mmap region (0 load_bias
 			 * without MAP_FIXED).
 			 */
-			if (elf_interpreter) {
+			if (interpreter) {
 				load_bias = ELF_ET_DYN_BASE;
 				if (current->flags & PF_RANDOMIZE)
 					load_bias += arch_mmap_rnd();
@@ -1075,7 +1080,7 @@ static int load_elf_binary(struct linux_
 		goto out_free_dentry;
 	}
 
-	if (elf_interpreter) {
+	if (interpreter) {
 		unsigned long interp_map_addr = 0;
 
 		elf_entry = load_elf_interp(&loc->interp_elf_ex,
@@ -1099,7 +1104,6 @@ static int load_elf_binary(struct linux_
 
 		allow_write_access(interpreter);
 		fput(interpreter);
-		kfree(elf_interpreter);
 	} else {
 		elf_entry = loc->elf_ex.e_entry;
 		if (BAD_ADDR(elf_entry)) {
@@ -1114,7 +1118,7 @@ static int load_elf_binary(struct linux_
 	set_binfmt(&elf_format);
 
 #ifdef ARCH_HAS_SETUP_ADDITIONAL_PAGES
-	retval = arch_setup_additional_pages(bprm, !!elf_interpreter);
+	retval = arch_setup_additional_pages(bprm, !!interpreter);
 	if (retval < 0)
 		goto out;
 #endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */
@@ -1175,8 +1179,6 @@ out_free_dentry:
 	allow_write_access(interpreter);
 	if (interpreter)
 		fput(interpreter);
-out_free_interp:
-	kfree(elf_interpreter);
 out_free_ph:
 	kfree(elf_phdata);
 	goto out;
_

Patches currently in -mm which might be from adobriyan@xxxxxxxxx are

ramfs-support-o_tmpfile.patch