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From 5893e64ca8c147b7acfa12cd9824f254d53ee261 Mon Sep 17 00:00:00 2001
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From: mohit84 <moagrawa@redhat.com>
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Date: Wed, 4 Nov 2020 09:02:03 +0530
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Subject: [PATCH 496/511] posix: Use MALLOC instead of alloca to allocate
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memory for xattrs list (#1730)
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In case of file is having huge xattrs on backend a brick process is
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crashed while alloca(size) limit has been crossed 256k because iot_worker
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stack size is 256k.
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> Fixes: #1699
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> Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>
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> Change-Id: I100468234f83329a7d65b43cbe4e10450c1ccecd
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> (Cherry pick from commit fd666caa35ac84dd1cba55399761982011b77112)
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> (Reviewed on upstream link https://github.com/gluster/glusterfs/pull/1828)
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Change-Id: I100468234f83329a7d65b43cbe4e10450c1ccecd
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Bug: 1903468
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Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/220872
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
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---
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xlators/storage/posix/src/posix-gfid-path.c | 5 ++++-
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xlators/storage/posix/src/posix-helpers.c | 3 ++-
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xlators/storage/posix/src/posix-inode-fd-ops.c | 12 +++++++++---
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3 files changed, 15 insertions(+), 5 deletions(-)
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diff --git a/xlators/storage/posix/src/posix-gfid-path.c b/xlators/storage/posix/src/posix-gfid-path.c
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index 64b5c6c..01315ac 100644
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--- a/xlators/storage/posix/src/posix-gfid-path.c
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+++ b/xlators/storage/posix/src/posix-gfid-path.c
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@@ -195,7 +195,8 @@ posix_get_gfid2path(xlator_t *this, inode_t *inode, const char *real_path,
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if (size == 0)
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goto done;
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}
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- list = alloca(size);
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+
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+ list = GF_MALLOC(size, gf_posix_mt_char);
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if (!list) {
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*op_errno = errno;
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goto err;
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@@ -309,6 +310,7 @@ done:
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GF_FREE(paths[j]);
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}
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ret = 0;
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+ GF_FREE(list);
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return ret;
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err:
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if (path)
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@@ -317,5 +319,6 @@ err:
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if (paths[j])
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GF_FREE(paths[j]);
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}
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+ GF_FREE(list);
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return ret;
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}
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diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
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index 73a44be..ceac52a 100644
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--- a/xlators/storage/posix/src/posix-helpers.c
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+++ b/xlators/storage/posix/src/posix-helpers.c
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@@ -349,7 +349,7 @@ _posix_get_marker_all_contributions(posix_xattr_filler_t *filler)
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goto out;
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}
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- list = alloca(size);
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+ list = GF_MALLOC(size, gf_posix_mt_char);
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if (!list) {
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goto out;
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}
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@@ -379,6 +379,7 @@ _posix_get_marker_all_contributions(posix_xattr_filler_t *filler)
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ret = 0;
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out:
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+ GF_FREE(list);
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return ret;
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}
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diff --git a/xlators/storage/posix/src/posix-inode-fd-ops.c b/xlators/storage/posix/src/posix-inode-fd-ops.c
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index 21119ea..1d37aed 100644
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--- a/xlators/storage/posix/src/posix-inode-fd-ops.c
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+++ b/xlators/storage/posix/src/posix-inode-fd-ops.c
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@@ -3305,7 +3305,7 @@ posix_get_ancestry_non_directory(xlator_t *this, inode_t *leaf_inode,
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goto out;
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}
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- list = alloca(size);
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+ list = GF_MALLOC(size, gf_posix_mt_char);
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if (!list) {
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*op_errno = errno;
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goto out;
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@@ -3385,6 +3385,7 @@ posix_get_ancestry_non_directory(xlator_t *this, inode_t *leaf_inode,
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op_ret = 0;
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out:
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+ GF_FREE(list);
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return op_ret;
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}
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@@ -3810,7 +3811,8 @@ posix_getxattr(call_frame_t *frame, xlator_t *this, loc_t *loc,
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if (size == 0)
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goto done;
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}
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- list = alloca(size);
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+
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+ list = GF_MALLOC(size, gf_posix_mt_char);
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if (!list) {
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op_errno = errno;
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goto out;
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@@ -3937,6 +3939,7 @@ out:
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dict_unref(dict);
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}
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+ GF_FREE(list);
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return 0;
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}
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@@ -4136,7 +4139,8 @@ posix_fgetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *name,
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if (size == 0)
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goto done;
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}
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- list = alloca(size + 1);
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+
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+ list = GF_MALLOC(size, gf_posix_mt_char);
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if (!list) {
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op_ret = -1;
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op_errno = ENOMEM;
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@@ -4240,6 +4244,8 @@ out:
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if (dict)
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dict_unref(dict);
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+ GF_FREE(list);
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+
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return 0;
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}
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--
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1.8.3.1
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