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From 7d87933f648092ae55d57a96fd06e3df975d764c Mon Sep 17 00:00:00 2001
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From: Ashish Pandey <aspandey@redhat.com>
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Date: Tue, 18 Aug 2020 10:33:48 +0530
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Subject: [PATCH 463/465] cluster/ec: Change handling of heal failure to avoid
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crash
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Problem:
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ec_getxattr_heal_cbk was called with NULL as second argument
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in case heal was failing.
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This function was dereferencing "cookie" argument which caused crash.
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Solution:
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Cookie is changed to carry the value that was supposed to be
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stored in fop->data, so even in the case when fop is NULL in error
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case, there won't be any NULL dereference.
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Thanks to Xavi for the suggestion about the fix.
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>Upstream patch: https://review.gluster.org/#/c/glusterfs/+/23050/
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>fixes: bz#1729085
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Change-Id: I0798000d5cadb17c3c2fbfa1baf77033ffc2bb8c
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BUG: 1852736
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Reviewed-on: https://code.engineering.redhat.com/gerrit/209012
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Tested-by: Ashish Pandey <aspandey@redhat.com>
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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Reviewed-by: Xavi Hernandez Juan <xhernandez@redhat.com>
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---
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xlators/cluster/ec/src/ec-heal.c | 11 ++++++-----
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xlators/cluster/ec/src/ec-inode-read.c | 4 ++--
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2 files changed, 8 insertions(+), 7 deletions(-)
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diff --git a/xlators/cluster/ec/src/ec-heal.c b/xlators/cluster/ec/src/ec-heal.c
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index 7d25853..6e6948b 100644
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--- a/xlators/cluster/ec/src/ec-heal.c
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+++ b/xlators/cluster/ec/src/ec-heal.c
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@@ -1966,7 +1966,7 @@ ec_manager_heal_block(ec_fop_data_t *fop, int32_t state)
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case EC_STATE_REPORT:
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if (fop->cbks.heal) {
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- fop->cbks.heal(fop->req_frame, fop, fop->xl, 0, 0,
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+ fop->cbks.heal(fop->req_frame, fop->data, fop->xl, 0, 0,
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(heal->good | heal->bad), heal->good, heal->bad,
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0, NULL);
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}
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@@ -2022,10 +2022,11 @@ ec_heal_block_done(call_frame_t *frame, void *cookie, xlator_t *this,
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uintptr_t good, uintptr_t bad, uint32_t pending,
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dict_t *xdata)
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{
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- ec_fop_data_t *fop = cookie;
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- ec_heal_t *heal = fop->data;
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+ ec_heal_t *heal = cookie;
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- fop->heal = NULL;
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+ if (heal->fop) {
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+ heal->fop->heal = NULL;
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+ }
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heal->fop = NULL;
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heal->error = op_ret < 0 ? op_errno : 0;
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syncbarrier_wake(heal->data);
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@@ -2669,7 +2670,7 @@ ec_heal_do(xlator_t *this, void *data, loc_t *loc, int32_t partial)
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out:
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ec_reset_entry_healing(fop);
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if (fop->cbks.heal) {
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- fop->cbks.heal(fop->req_frame, fop, fop->xl, op_ret, op_errno,
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+ fop->cbks.heal(fop->req_frame, fop->data, fop->xl, op_ret, op_errno,
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ec_char_array_to_mask(participants, ec->nodes),
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mgood & good, mbad & bad, pending, NULL);
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}
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diff --git a/xlators/cluster/ec/src/ec-inode-read.c b/xlators/cluster/ec/src/ec-inode-read.c
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index e82e8f6..c50d0ad 100644
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--- a/xlators/cluster/ec/src/ec-inode-read.c
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+++ b/xlators/cluster/ec/src/ec-inode-read.c
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@@ -396,8 +396,8 @@ ec_getxattr_heal_cbk(call_frame_t *frame, void *cookie, xlator_t *xl,
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uintptr_t good, uintptr_t bad, uint32_t pending,
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dict_t *xdata)
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{
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- ec_fop_data_t *fop = cookie;
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- fop_getxattr_cbk_t func = fop->data;
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+ fop_getxattr_cbk_t func = cookie;
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+
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ec_t *ec = xl->private;
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dict_t *dict = NULL;
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char *str;
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--
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1.8.3.1
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