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Fix use-after-free bugs in icp code 

These were reported by Coverity as "Read from pointer after free" bugs.
Presumably, it did not report it as a use-after-free bug because it does
not understand the inline assembly that implements the atomic
instruction.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13881
This commit is contained in:
Richard Yao 2022-09-15 14:46:42 -04:00 committed by Tony Hutter
parent 3f380df778
commit 1d5e569a69
2 changed files with 2 additions and 2 deletions
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2
module/icp/core/kcf_mech_tabs.c
View File

@ -720,8 +720,8 @@ kcf_remove_mech_provider(char *mech_name, kcf_provider_desc_t *prov_desc)
}
/* free entry */
KCF_PROV_REFRELE(prov_mech->pm_prov_desc);
KCF_PROV_IREFRELE(prov_mech->pm_prov_desc);
KCF_PROV_REFRELE(prov_mech->pm_prov_desc);
kmem_free(prov_mech, sizeof (kcf_prov_mech_desc_t));
}

2
module/icp/core/kcf_prov_tabs.c
View File

@ -171,8 +171,8 @@ kcf_prov_tab_rem_provider(crypto_provider_id_t prov_id)
* at that time.
*/
KCF_PROV_REFRELE(prov_desc);
KCF_PROV_IREFRELE(prov_desc);
KCF_PROV_REFRELE(prov_desc);
return (CRYPTO_SUCCESS);
}