From afdd83a9b69573b854e732795c0bcba0a00d6c0f Mon Sep 17 00:00:00 2001 From: Mohit Agrawal Date: Fri, 13 Jan 2017 12:17:05 +0530 Subject: upcall: Resolve dict leak from up_(f)removexattr in upcall code path Problem: In up_(f)removexattr() dict_for_key_value() is used to create a new dict. This dict is not correctly unref'd and gets leaked. Solution: To avoid the leak up_(f)removexattr() now also does a dict_unref() on the newly created dict. While reviewing the code in up_(f)setxattr() for a similar problem, it was noticed that there is an extra dict created. There is no need for this copy, upcall_local_init() can just take the dict that was passed as argument to the FOP. BUG: 1412917 Change-Id: I5bb9a7d99f5087af11c19ae722de62bdb5ad1498 Signed-off-by: Mohit Agrawal Reviewed-on: http://review.gluster.org/16392 NetBSD-regression: NetBSD Build System CentOS-regression: Gluster Build System Reviewed-by: Niels de Vos Smoke: Gluster Build System --- xlators/features/upcall/src/upcall.c | 36 ++++++++++++++---------------------- 1 file changed, 14 insertions(+), 22 deletions(-) (limited to 'xlators/features/upcall') diff --git a/xlators/features/upcall/src/upcall.c b/xlators/features/upcall/src/upcall.c index 153e3a8e59f..19180e555f5 100644 --- a/xlators/features/upcall/src/upcall.c +++ b/xlators/features/upcall/src/upcall.c @@ -1682,22 +1682,14 @@ up_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict, { int32_t op_errno = -1; upcall_local_t *local = NULL; - dict_t *xattr = NULL; EXIT_IF_UPCALL_OFF (this, out); - xattr = dict_copy_with_ref (dict, NULL); - if (!xattr) { - op_errno = ENOMEM; - goto err; - } - - local = upcall_local_init (frame, this, loc, NULL, loc->inode, xattr); + local = upcall_local_init (frame, this, loc, NULL, loc->inode, dict); if (!local) { op_errno = ENOMEM; goto err; } - dict_unref (xattr); out: STACK_WIND (frame, up_setxattr_cbk, FIRST_CHILD(this), @@ -1707,8 +1699,6 @@ out: return 0; err: - if (xattr) - dict_unref (xattr); UPCALL_STACK_UNWIND (setxattr, frame, -1, op_errno, NULL); return 0; @@ -1769,22 +1759,14 @@ up_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict, { int32_t op_errno = -1; upcall_local_t *local = NULL; - dict_t *xattr = NULL; EXIT_IF_UPCALL_OFF (this, out); - xattr = dict_copy_with_ref (dict, NULL); - if (!xattr) { - op_errno = ENOMEM; - goto err; - } - - local = upcall_local_init (frame, this, NULL, fd, fd->inode, xattr); + local = upcall_local_init (frame, this, NULL, fd, fd->inode, dict); if (!local) { op_errno = ENOMEM; goto err; } - dict_unref (xattr); out: STACK_WIND (frame, up_fsetxattr_cbk, @@ -1794,8 +1776,6 @@ out: return 0; err: - if (xattr) - dict_unref (xattr); UPCALL_STACK_UNWIND (fsetxattr, frame, -1, op_errno, NULL); return 0; @@ -1872,12 +1852,18 @@ up_fremovexattr (call_frame_t *frame, xlator_t *this, fd_t *fd, } out: + if (xattr) + dict_unref (xattr); + STACK_WIND (frame, up_fremovexattr_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->fremovexattr, fd, name, xdata); return 0; err: + if (xattr) + dict_unref (xattr); + UPCALL_STACK_UNWIND (fremovexattr, frame, -1, op_errno, NULL); return 0; @@ -1954,12 +1940,18 @@ up_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc, } out: + if (xattr) + dict_unref (xattr); + STACK_WIND (frame, up_removexattr_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->removexattr, loc, name, xdata); return 0; err: + if (xattr) + dict_unref (xattr); + UPCALL_STACK_UNWIND (removexattr, frame, -1, op_errno, NULL); return 0; -- cgit