90 lines
4.1 KiB
Diff
90 lines
4.1 KiB
Diff
From 9c580285c32d1e8f684c51cdc3a023319f05b1f8 Mon Sep 17 00:00:00 2001
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From: mohit84 <moagrawa@redhat.com>
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Date: Wed, 25 Oct 2023 11:48:51 +0530
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Subject: [PATCH] dht: fix asan use-after-free bug (#4248)
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The client is throwing below stacktrace while asan is enabled. The client is facing
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an issue while application is trying to call removexattr in 2x1 subvol and non-mds
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subvol is down. As we can see in below stacktrace dht_setxattr_mds_cbk is calling
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dht_setxattr_non_mds_cbk and dht_setxattr_non_mds_cbk is trying to wipe local because
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call_cnt is 0 but dht_setxattr_mds_cbk is trying to access frame->local that;s why
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it is crashed.
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x621000051c34 is located 1844 bytes inside of 4164-byte region [0x621000051500,0x621000052544) freed by thread T7 here:
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Solution: Use switch instead of using if statement to wind a operation, in case of switch
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the code will not try to access local after wind a operation for last dht subvol.
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> Fixes: #3732
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> Change-Id: I031bc814d6df98058430ef4de7040e3370d1c677
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> (Cherry picke from commit 11ff6f56a1e7ad740ffe46e39a5911c9e7367eb6)
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> (Reviwed on upstream link https://github.com/gluster/glusterfs/pull/4242)
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Fixes: #3732
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Change-Id: I031bc814d6df98058430ef4de7040e3370d1c677
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Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>
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---
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xlators/cluster/dht/src/dht-common.c | 45 ++++++++++++++--------------
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1 file changed, 23 insertions(+), 22 deletions(-)
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diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
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index b31b88296b..c5c83c20aa 100644
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--- a/xlators/cluster/dht/src/dht-common.c
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+++ b/xlators/cluster/dht/src/dht-common.c
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@@ -3965,28 +3965,29 @@ dht_setxattr_mds_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
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for (i = 0; i < conf->subvolume_cnt; i++) {
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if (mds_subvol && (mds_subvol == conf->subvolumes[i]))
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continue;
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- if (local->fop == GF_FOP_SETXATTR) {
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- STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i],
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- conf->subvolumes[i]->fops->setxattr, &local->loc,
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- local->xattr, local->flags, local->xattr_req);
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- }
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-
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- if (local->fop == GF_FOP_FSETXATTR) {
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- STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i],
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- conf->subvolumes[i]->fops->fsetxattr, local->fd,
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- local->xattr, local->flags, local->xattr_req);
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- }
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-
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- if (local->fop == GF_FOP_REMOVEXATTR) {
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- STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i],
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- conf->subvolumes[i]->fops->removexattr, &local->loc,
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- local->key, local->xattr_req);
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- }
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-
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- if (local->fop == GF_FOP_FREMOVEXATTR) {
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- STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i],
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- conf->subvolumes[i]->fops->fremovexattr, local->fd,
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- local->key, local->xattr_req);
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+ switch (local->fop) {
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+ case GF_FOP_SETXATTR:
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+ STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i],
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+ conf->subvolumes[i]->fops->setxattr, &local->loc,
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+ local->xattr, local->flags, local->xattr_req);
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+ break;
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+ case GF_FOP_FSETXATTR:
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+ STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i],
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+ conf->subvolumes[i]->fops->fsetxattr, local->fd,
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+ local->xattr, local->flags, local->xattr_req);
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+ break;
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+ case GF_FOP_REMOVEXATTR:
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+ STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i],
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+ conf->subvolumes[i]->fops->removexattr, &local->loc,
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+ local->key, local->xattr_req);
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+ break;
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+ case GF_FOP_FREMOVEXATTR:
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+ STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i],
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+ conf->subvolumes[i]->fops->fremovexattr, local->fd,
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+ local->key, local->xattr_req);
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+ break;
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+ default:
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+ break;
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}
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}
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--
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2.33.0
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