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gfs2: Free rd_bits later in gfs2_clear_rgrpd to fix use-after-free
[ Upstream commit d0f17d3883
]
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>
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1 changed files with 1 additions and 1 deletions
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@ -720,9 +720,9 @@ void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
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}
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}
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gfs2_free_clones(rgd);
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gfs2_free_clones(rgd);
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return_all_reservations(rgd);
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kfree(rgd->rd_bits);
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kfree(rgd->rd_bits);
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rgd->rd_bits = NULL;
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rgd->rd_bits = NULL;
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return_all_reservations(rgd);
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kmem_cache_free(gfs2_rgrpd_cachep, rgd);
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kmem_cache_free(gfs2_rgrpd_cachep, rgd);
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}
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}
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}
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}
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