* [PATCH 1/3] sqlite3: fix CVE-2020-9327
@ 2020-03-09 0:45 Anuj Mittal
2020-03-09 0:45 ` [PATCH 2/3] e2fsprogs: fix CVE-2019-5188 Anuj Mittal
2020-03-09 0:45 ` [PATCH 3/3] e2fsprogs: backport upstream patch Anuj Mittal
0 siblings, 2 replies; 3+ messages in thread
From: Anuj Mittal @ 2020-03-09 0:45 UTC (permalink / raw)
To: openembedded-core
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
---
.../sqlite/files/CVE-2020-9327.patch | 141 ++++++++++++++++++
meta/recipes-support/sqlite/sqlite3_3.31.1.bb | 1 +
2 files changed, 142 insertions(+)
create mode 100644 meta/recipes-support/sqlite/files/CVE-2020-9327.patch
diff --git a/meta/recipes-support/sqlite/files/CVE-2020-9327.patch b/meta/recipes-support/sqlite/files/CVE-2020-9327.patch
new file mode 100644
index 0000000000..fecbbabce8
--- /dev/null
+++ b/meta/recipes-support/sqlite/files/CVE-2020-9327.patch
@@ -0,0 +1,141 @@
+From 45d491851e1bca378de158a5e279fd584ce548e4 Mon Sep 17 00:00:00 2001
+From: "D. Richard Hipp" <drh@hwaci.com>
+Date: Mon, 17 Feb 2020 00:12:04 +0000
+Subject: [PATCH] [PATCH 1/2] Take care when checking the table of a TK_COLUMN
+ expression node to see if the table is a virtual table to first ensure that
+ the Expr.y.pTab pointer is not null due to generated column optimizations.
+ Ticket [4374860b29383380].
+
+FossilOrigin-Name: 9d0d4ab95dc0c56e053c2924ed322a9ea7b25439e6f74599f706905a1994e454
+
+[PATCH 2/2] A better (smaller and faster) solution to ticket
+ [4374860b29383380].
+
+FossilOrigin-Name: abc473fb8fb999005dc79a360e34f97b3b25429decf1820dd2afa5c19577753d
+
+The two patches were converted to amalgamation format
+
+Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
+Upstream-Status: Backport
+CVE: CVE-2020-9327
+---
+ sqlite3.c | 35 ++++++++++++++++++++++++-----------
+ sqlite3.h | 2 +-
+ 2 files changed, 25 insertions(+), 12 deletions(-)
+
+diff --git a/sqlite3.c b/sqlite3.c
+index 55dc686..64fae04 100644
+--- a/sqlite3.c
++++ b/sqlite3.c
+@@ -1167,7 +1167,7 @@ extern "C" {
+ */
+ #define SQLITE_VERSION "3.31.1"
+ #define SQLITE_VERSION_NUMBER 3031001
+-#define SQLITE_SOURCE_ID "2020-01-27 19:55:54 3bfa9cc97da10598521b342961df8f5f68c7388fa117345eeb516eaa837bb4d6"
++#define SQLITE_SOURCE_ID "2020-01-27 19:55:54 3bfa9cc97da10598521b342961df8f5f68c7388fa117345eeb516eaa837balt1"
+
+ /*
+ ** CAPI3REF: Run-Time Library Version Numbers
+@@ -17428,8 +17428,11 @@ struct Table {
+ */
+ #ifndef SQLITE_OMIT_VIRTUALTABLE
+ # define IsVirtual(X) ((X)->nModuleArg)
++# define ExprIsVtab(X) \
++ ((X)->op==TK_COLUMN && (X)->y.pTab!=0 && (X)->y.pTab->nModuleArg)
+ #else
+ # define IsVirtual(X) 0
++# define ExprIsVtab(X) 0
+ #endif
+
+ /*
+@@ -104133,19 +104136,25 @@ static int impliesNotNullRow(Walker *pWalker, Expr *pExpr){
+ case TK_LT:
+ case TK_LE:
+ case TK_GT:
+- case TK_GE:
++ case TK_GE: {
++ Expr *pLeft = pExpr->pLeft;
++ Expr *pRight = pExpr->pRight;
+ testcase( pExpr->op==TK_EQ );
+ testcase( pExpr->op==TK_NE );
+ testcase( pExpr->op==TK_LT );
+ testcase( pExpr->op==TK_LE );
+ testcase( pExpr->op==TK_GT );
+ testcase( pExpr->op==TK_GE );
+- if( (pExpr->pLeft->op==TK_COLUMN && IsVirtual(pExpr->pLeft->y.pTab))
+- || (pExpr->pRight->op==TK_COLUMN && IsVirtual(pExpr->pRight->y.pTab))
++ /* The y.pTab=0 assignment in wherecode.c always happens after the
++ ** impliesNotNullRow() test */
++ if( (pLeft->op==TK_COLUMN && ALWAYS(pLeft->y.pTab!=0)
++ && IsVirtual(pLeft->y.pTab))
++ || (pRight->op==TK_COLUMN && ALWAYS(pRight->y.pTab!=0)
++ && IsVirtual(pRight->y.pTab))
+ ){
+- return WRC_Prune;
++ return WRC_Prune;
+ }
+-
++ }
+ default:
+ return WRC_Continue;
+ }
+@@ -142591,7 +142600,8 @@ static int isAuxiliaryVtabOperator(
+ ** MATCH(expression,vtab_column)
+ */
+ pCol = pList->a[1].pExpr;
+- if( pCol->op==TK_COLUMN && IsVirtual(pCol->y.pTab) ){
++ testcase( pCol->op==TK_COLUMN && pCol->y.pTab==0 );
++ if( ExprIsVtab(pCol) ){
+ for(i=0; i<ArraySize(aOp); i++){
+ if( sqlite3StrICmp(pExpr->u.zToken, aOp[i].zOp)==0 ){
+ *peOp2 = aOp[i].eOp2;
+@@ -142613,7 +142623,8 @@ static int isAuxiliaryVtabOperator(
+ ** with function names in an arbitrary case.
+ */
+ pCol = pList->a[0].pExpr;
+- if( pCol->op==TK_COLUMN && IsVirtual(pCol->y.pTab) ){
++ testcase( pCol->op==TK_COLUMN && pCol->y.pTab==0 );
++ if( ExprIsVtab(pCol) ){
+ sqlite3_vtab *pVtab;
+ sqlite3_module *pMod;
+ void (*xNotUsed)(sqlite3_context*,int,sqlite3_value**);
+@@ -142636,10 +142647,12 @@ static int isAuxiliaryVtabOperator(
+ int res = 0;
+ Expr *pLeft = pExpr->pLeft;
+ Expr *pRight = pExpr->pRight;
+- if( pLeft->op==TK_COLUMN && IsVirtual(pLeft->y.pTab) ){
++ testcase( pLeft->op==TK_COLUMN && pLeft->y.pTab==0 );
++ if( ExprIsVtab(pLeft) ){
+ res++;
+ }
+- if( pRight && pRight->op==TK_COLUMN && IsVirtual(pRight->y.pTab) ){
++ testcase( pRight && pRight->op==TK_COLUMN && pRight->y.pTab==0 );
++ if( pRight && ExprIsVtab(pRight) ){
+ res++;
+ SWAP(Expr*, pLeft, pRight);
+ }
+@@ -228440,7 +228453,7 @@ SQLITE_API int sqlite3_stmt_init(
+ #endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */
+
+ /************** End of stmt.c ************************************************/
+-#if __LINE__!=228443
++#if __LINE__!=228456
+ #undef SQLITE_SOURCE_ID
+ #define SQLITE_SOURCE_ID "2020-01-27 19:55:54 3bfa9cc97da10598521b342961df8f5f68c7388fa117345eeb516eaa837balt2"
+ #endif
+diff --git a/sqlite3.h b/sqlite3.h
+index cef6eea..5b9796c 100644
+--- a/sqlite3.h
++++ b/sqlite3.h
+@@ -125,7 +125,7 @@ extern "C" {
+ */
+ #define SQLITE_VERSION "3.31.1"
+ #define SQLITE_VERSION_NUMBER 3031001
+-#define SQLITE_SOURCE_ID "2020-01-27 19:55:54 3bfa9cc97da10598521b342961df8f5f68c7388fa117345eeb516eaa837bb4d6"
++#define SQLITE_SOURCE_ID "2020-01-27 19:55:54 3bfa9cc97da10598521b342961df8f5f68c7388fa117345eeb516eaa837balt1"
+
+ /*
+ ** CAPI3REF: Run-Time Library Version Numbers
+--
+2.25.1
+
diff --git a/meta/recipes-support/sqlite/sqlite3_3.31.1.bb b/meta/recipes-support/sqlite/sqlite3_3.31.1.bb
index 903d66ab29..de564e2698 100644
--- a/meta/recipes-support/sqlite/sqlite3_3.31.1.bb
+++ b/meta/recipes-support/sqlite/sqlite3_3.31.1.bb
@@ -4,6 +4,7 @@ LICENSE = "PD"
LIC_FILES_CHKSUM = "file://sqlite3.h;endline=11;md5=786d3dc581eff03f4fd9e4a77ed00c66"
SRC_URI = "http://www.sqlite.org/2020/sqlite-autoconf-${SQLITE_PV}.tar.gz \
+ file://CVE-2020-9327.patch \
"
SRC_URI[md5sum] = "2d0a553534c521504e3ac3ad3b90f125"
SRC_URI[sha256sum] = "62284efebc05a76f909c580ffa5c008a7d22a1287285d68b7825a2b6b51949ae"
--
2.24.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH 2/3] e2fsprogs: fix CVE-2019-5188
2020-03-09 0:45 [PATCH 1/3] sqlite3: fix CVE-2020-9327 Anuj Mittal
@ 2020-03-09 0:45 ` Anuj Mittal
2020-03-09 0:45 ` [PATCH 3/3] e2fsprogs: backport upstream patch Anuj Mittal
1 sibling, 0 replies; 3+ messages in thread
From: Anuj Mittal @ 2020-03-09 0:45 UTC (permalink / raw)
To: openembedded-core
Also see:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=948508
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
---
...-t-try-to-rehash-a-deleted-directory.patch | 49 ++++++++++++++++
.../e2fsprogs/e2fsprogs/CVE-2019-5188.patch | 57 +++++++++++++++++++
.../e2fsprogs/e2fsprogs_1.45.4.bb | 2 +
3 files changed, 108 insertions(+)
create mode 100644 meta/recipes-devtools/e2fsprogs/e2fsprogs/0001-e2fsck-don-t-try-to-rehash-a-deleted-directory.patch
create mode 100644 meta/recipes-devtools/e2fsprogs/e2fsprogs/CVE-2019-5188.patch
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs/0001-e2fsck-don-t-try-to-rehash-a-deleted-directory.patch b/meta/recipes-devtools/e2fsprogs/e2fsprogs/0001-e2fsck-don-t-try-to-rehash-a-deleted-directory.patch
new file mode 100644
index 0000000000..ba4e3a3c97
--- /dev/null
+++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs/0001-e2fsck-don-t-try-to-rehash-a-deleted-directory.patch
@@ -0,0 +1,49 @@
+From 71ba13755337e19c9a826dfc874562a36e1b24d3 Mon Sep 17 00:00:00 2001
+From: Theodore Ts'o <tytso@mit.edu>
+Date: Thu, 19 Dec 2019 19:45:06 -0500
+Subject: [PATCH] e2fsck: don't try to rehash a deleted directory
+
+If directory has been deleted in pass1[bcd] processing, then we
+shouldn't try to rehash the directory in pass 3a when we try to
+rehash/reoptimize directories.
+
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/commit/?id=71ba13755337e19c9a826dfc874562a36e1b24d3]
+Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
+---
+ e2fsck/pass1b.c | 4 ++++
+ e2fsck/rehash.c | 2 ++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/e2fsck/pass1b.c b/e2fsck/pass1b.c
+index 5693b9cf..bca701ca 100644
+--- a/e2fsck/pass1b.c
++++ b/e2fsck/pass1b.c
+@@ -705,6 +705,10 @@ static void delete_file(e2fsck_t ctx, ext2_ino_t ino,
+ fix_problem(ctx, PR_1B_BLOCK_ITERATE, &pctx);
+ if (ctx->inode_bad_map)
+ ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
++ if (ctx->inode_reg_map)
++ ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
++ ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
++ ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
+ ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(dp->inode.i_mode));
+ quota_data_sub(ctx->qctx, &dp->inode, ino,
+ pb.dup_blocks * fs->blocksize);
+diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
+index 3dd1e941..2c908be0 100644
+--- a/e2fsck/rehash.c
++++ b/e2fsck/rehash.c
+@@ -1028,6 +1028,8 @@ void e2fsck_rehash_directories(e2fsck_t ctx)
+ if (!ext2fs_u32_list_iterate(iter, &ino))
+ break;
+ }
++ if (!ext2fs_test_inode_bitmap2(ctx->inode_dir_map, ino))
++ continue;
+
+ pctx.dir = ino;
+ if (first) {
+--
+2.24.1
+
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs/CVE-2019-5188.patch b/meta/recipes-devtools/e2fsprogs/e2fsprogs/CVE-2019-5188.patch
new file mode 100644
index 0000000000..de4bce0037
--- /dev/null
+++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs/CVE-2019-5188.patch
@@ -0,0 +1,57 @@
+From 8dd73c149f418238f19791f9d666089ef9734dff Mon Sep 17 00:00:00 2001
+From: Theodore Ts'o <tytso@mit.edu>
+Date: Thu, 19 Dec 2019 19:37:34 -0500
+Subject: [PATCH] e2fsck: abort if there is a corrupted directory block when
+ rehashing
+
+In e2fsck pass 3a, when we are rehashing directories, at least in
+theory, all of the directories should have had corruptions with
+respect to directory entry structure fixed. However, it's possible
+(for example, if the user declined a fix) that we can reach this stage
+of processing with a corrupted directory entries.
+
+So check for that case and don't try to process a corrupted directory
+block so we don't run into trouble in mutate_name() if there is a
+zero-length file name.
+
+Addresses: TALOS-2019-0973
+Addresses: CVE-2019-5188
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+
+CVE: CVE-2019-5188
+Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/commit/?id=8dd73c149f418238f19791f9d666089ef9734dff]
+---
+ e2fsck/rehash.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
+index a5fc1be1..3dd1e941 100644
+--- a/e2fsck/rehash.c
++++ b/e2fsck/rehash.c
+@@ -160,6 +160,10 @@ static int fill_dir_block(ext2_filsys fs,
+ dir_offset += rec_len;
+ if (dirent->inode == 0)
+ continue;
++ if ((name_len) == 0) {
++ fd->err = EXT2_ET_DIR_CORRUPTED;
++ return BLOCK_ABORT;
++ }
+ if (!fd->compress && (name_len == 1) &&
+ (dirent->name[0] == '.'))
+ continue;
+@@ -401,6 +405,11 @@ static int duplicate_search_and_fix(e2fsck_t ctx, ext2_filsys fs,
+ continue;
+ }
+ new_len = ext2fs_dirent_name_len(ent->dir);
++ if (new_len == 0) {
++ /* should never happen */
++ ext2fs_unmark_valid(fs);
++ continue;
++ }
+ memcpy(new_name, ent->dir->name, new_len);
+ mutate_name(new_name, &new_len);
+ for (j=0; j < fd->num_array; j++) {
+--
+2.24.1
+
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.45.4.bb b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.45.4.bb
index 6e69eea21c..fc92b77ab6 100644
--- a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.45.4.bb
+++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.45.4.bb
@@ -7,6 +7,8 @@ SRC_URI += "file://remove.ldconfig.call.patch \
file://0001-misc-create_inode.c-set-dir-s-mode-correctly.patch \
file://0001-configure.ac-correct-AM_GNU_GETTEXT.patch \
file://0001-intl-do-not-try-to-use-gettext-defines-that-no-longe.patch \
+ file://CVE-2019-5188.patch \
+ file://0001-e2fsck-don-t-try-to-rehash-a-deleted-directory.patch \
"
SRC_URI_append_class-native = " file://e2fsprogs-fix-missing-check-for-permission-denied.patch \
--
2.24.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH 3/3] e2fsprogs: backport upstream patch
2020-03-09 0:45 [PATCH 1/3] sqlite3: fix CVE-2020-9327 Anuj Mittal
2020-03-09 0:45 ` [PATCH 2/3] e2fsprogs: fix CVE-2019-5188 Anuj Mittal
@ 2020-03-09 0:45 ` Anuj Mittal
1 sibling, 0 replies; 3+ messages in thread
From: Anuj Mittal @ 2020-03-09 0:45 UTC (permalink / raw)
To: openembedded-core
Fixes a bug wherein a use after free could potentially be used to run
malicious code if a user can be tricked into running e2fsck on a
maliciously crafted file system.
Also see:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=948517
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
---
...fix-use-after-free-in-calculate_tree.patch | 76 +++++++++++++++++++
.../e2fsprogs/e2fsprogs_1.45.4.bb | 1 +
2 files changed, 77 insertions(+)
create mode 100644 meta/recipes-devtools/e2fsprogs/e2fsprogs/e2fsck-fix-use-after-free-in-calculate_tree.patch
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs/e2fsck-fix-use-after-free-in-calculate_tree.patch b/meta/recipes-devtools/e2fsprogs/e2fsprogs/e2fsck-fix-use-after-free-in-calculate_tree.patch
new file mode 100644
index 0000000000..342a2b855b
--- /dev/null
+++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs/e2fsck-fix-use-after-free-in-calculate_tree.patch
@@ -0,0 +1,76 @@
+From: Wang Shilong <wshilong@ddn.com>
+Date: Mon, 30 Dec 2019 19:52:39 -0500
+Subject: e2fsck: fix use after free in calculate_tree()
+
+The problem is alloc_blocks() will call get_next_block() which might
+reallocate outdir->buf, and memory address could be changed after
+this. To fix this, pointers that point into outdir->buf, such as
+int_limit and root need to be recaulated based on the new starting
+address of outdir->buf.
+
+[ Changed to correctly recalculate int_limit, and to optimize how we
+ reallocate outdir->buf. -TYT ]
+
+Addresses-Debian-Bug: 948517
+Signed-off-by: Wang Shilong <wshilong@ddn.com>
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+(cherry picked from commit 101e73e99ccafa0403fcb27dd7413033b587ca01)
+
+Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/commit/?id=101e73e99ccafa0403fcb27dd7413033b587ca01]
+---
+ e2fsck/rehash.c | 17 ++++++++++++++++-
+ 1 file changed, 16 insertions(+), 1 deletion(-)
+
+diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
+index 0a5888a9..2574e151 100644
+--- a/e2fsck/rehash.c
++++ b/e2fsck/rehash.c
+@@ -295,7 +295,11 @@ static errcode_t get_next_block(ext2_filsys fs, struct out_dir *outdir,
+ errcode_t retval;
+
+ if (outdir->num >= outdir->max) {
+- retval = alloc_size_dir(fs, outdir, outdir->max + 50);
++ int increment = outdir->max / 10;
++
++ if (increment < 50)
++ increment = 50;
++ retval = alloc_size_dir(fs, outdir, outdir->max + increment);
+ if (retval)
+ return retval;
+ }
+@@ -637,6 +641,9 @@ static int alloc_blocks(ext2_filsys fs,
+ if (retval)
+ return retval;
+
++ /* outdir->buf might be reallocated */
++ *prev_ent = (struct ext2_dx_entry *) (outdir->buf + *prev_offset);
++
+ *next_ent = set_int_node(fs, block_start);
+ *limit = (struct ext2_dx_countlimit *)(*next_ent);
+ if (next_offset)
+@@ -726,6 +733,9 @@ static errcode_t calculate_tree(ext2_filsys fs,
+ return retval;
+ }
+ if (c3 == 0) {
++ int delta1 = (char *)int_limit - outdir->buf;
++ int delta2 = (char *)root - outdir->buf;
++
+ retval = alloc_blocks(fs, &limit, &int_ent,
+ &dx_ent, &int_offset,
+ NULL, outdir, i, &c2,
+@@ -733,6 +743,11 @@ static errcode_t calculate_tree(ext2_filsys fs,
+ if (retval)
+ return retval;
+
++ /* outdir->buf might be reallocated */
++ int_limit = (struct ext2_dx_countlimit *)
++ (outdir->buf + delta1);
++ root = (struct ext2_dx_entry *)
++ (outdir->buf + delta2);
+ }
+ dx_ent->block = ext2fs_cpu_to_le32(i);
+ if (c3 != limit->limit)
+--
+2.24.1
+
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.45.4.bb b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.45.4.bb
index fc92b77ab6..4f7cafeac9 100644
--- a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.45.4.bb
+++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.45.4.bb
@@ -9,6 +9,7 @@ SRC_URI += "file://remove.ldconfig.call.patch \
file://0001-intl-do-not-try-to-use-gettext-defines-that-no-longe.patch \
file://CVE-2019-5188.patch \
file://0001-e2fsck-don-t-try-to-rehash-a-deleted-directory.patch \
+ file://e2fsck-fix-use-after-free-in-calculate_tree.patch \
"
SRC_URI_append_class-native = " file://e2fsprogs-fix-missing-check-for-permission-denied.patch \
--
2.24.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-03-09 0:45 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-03-09 0:45 [PATCH 1/3] sqlite3: fix CVE-2020-9327 Anuj Mittal
2020-03-09 0:45 ` [PATCH 2/3] e2fsprogs: fix CVE-2019-5188 Anuj Mittal
2020-03-09 0:45 ` [PATCH 3/3] e2fsprogs: backport upstream patch Anuj Mittal
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