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Fix memory leaks in dmu_send()/dmu_send_obj() 

If we encounter an EXDEV error when using the redacted snapshots
feature, the memory used by dspp.fromredactsnaps is leaked.

Clang's static analyzer caught this during an experiment in which I had
annotated various headers in an attempt to improve the results of static
analysis.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13973
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Richard Yao 2022-10-18 19:03:33 -04:00 committed by GitHub
parent 84243acb91
commit eaaed26ffb
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1 changed files with 8 additions and 0 deletions
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8
module/zfs/dmu_send.c
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@ -2714,6 +2714,10 @@ dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap,
dspp.numfromredactsnaps = NUM_SNAPS_NOT_REDACTED;
err = dmu_send_impl(&dspp);
}
if (dspp.fromredactsnaps)
kmem_free(dspp.fromredactsnaps,
dspp.numfromredactsnaps * sizeof (uint64_t));
dsl_dataset_rele(dspp.to_ds, FTAG);
return (err);
}
@ -2922,6 +2926,10 @@ dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok,
/* dmu_send_impl will call dsl_pool_rele for us. */
err = dmu_send_impl(&dspp);
} else {
if (dspp.fromredactsnaps)
kmem_free(dspp.fromredactsnaps,
dspp.numfromredactsnaps *
sizeof (uint64_t));
dsl_pool_rele(dspp.dp, FTAG);
}
} else {