From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Bob Peterson <rpeterso@redhat.com>,
Andreas Gruenbacher <agruenba@redhat.com>,
Sasha Levin <sashal@kernel.org>,
cluster-devel@redhat.com
Subject: [PATCH AUTOSEL 4.19 03/21] gfs2: Free rd_bits later in gfs2_clear_rgrpd to fix use-after-free
Date: Mon, 9 Nov 2020 22:55:23 -0500 [thread overview]
Message-ID: <20201110035541.424648-3-sashal@kernel.org> (raw)
In-Reply-To: <20201110035541.424648-1-sashal@kernel.org>
From: Bob Peterson <rpeterso@redhat.com>
[ Upstream commit d0f17d3883f1e3f085d38572c2ea8edbd5150172 ]
Function gfs2_clear_rgrpd calls kfree(rgd->rd_bits) before calling
return_all_reservations, but return_all_reservations still dereferences
rgd->rd_bits in __rs_deltree. Fix that by moving the call to kfree below the
call to return_all_reservations.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/gfs2/rgrp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index c94c4ac1ae78b..1686a40099f21 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -739,9 +739,9 @@ void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
}
gfs2_free_clones(rgd);
+ return_all_reservations(rgd);
kfree(rgd->rd_bits);
rgd->rd_bits = NULL;
- return_all_reservations(rgd);
kmem_cache_free(gfs2_rgrpd_cachep, rgd);
}
}
--
2.27.0
next prev parent reply other threads:[~2020-11-10 4:01 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 3:55 [PATCH AUTOSEL 4.19 01/21] usb: gadget: goku_udc: fix potential crashes in probe Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 02/21] ALSA: hda: Reinstate runtime_allow() for all hda controllers Sasha Levin
2020-11-10 3:55 ` Sasha Levin [this message]
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 04/21] gfs2: Add missing truncate_inode_pages_final for sd_aspace Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 05/21] gfs2: check for live vs. read-only file system in gfs2_fitrim Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 06/21] scsi: hpsa: Fix memory leak in hpsa_init_one() Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 07/21] drm/amdgpu: perform srbm soft reset always on SDMA resume Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 08/21] drm/amd/pm: perform SMC reset on suspend/hibernation Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 09/21] drm/amd/pm: do not use ixFEATURE_STATUS for checking smc running Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 10/21] mac80211: fix use of skb payload instead of header Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 11/21] mac80211: always wind down STA state Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 12/21] cfg80211: regulatory: Fix inconsistent format argument Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 13/21] scsi: scsi_dh_alua: Avoid crash during alua_bus_detach() Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 14/21] iommu/amd: Increase interrupt remapping table limit to 512 entries Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 15/21] s390/smp: move rcu_cpu_starting() earlier Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 16/21] vfio: platform: fix reference leak in vfio_platform_open Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 17/21] net: usb: qmi_wwan: add Telit LE910Cx 0x1230 composition Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 18/21] kprobes: Tell lockdep about kprobe nesting Sasha Levin
2020-11-10 6:44 ` Masami Hiramatsu
2020-11-14 22:58 ` Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 19/21] selftests: proc: fix warning: _GNU_SOURCE redefined Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 20/21] tpm_tis: Disable interrupts on ThinkPad T490s Sasha Levin
2020-11-10 3:55 ` [PATCH AUTOSEL 4.19 21/21] vt: Disable KD_FONT_OP_COPY Sasha Levin
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