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| author | Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> | 2023-03-20 23:14:15 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-21 09:00:08 +0100 |
| commit | 6b301ded45a6d9538f5f579a2e9f4b6c45fa988b (patch) | |
| tree | 0efa15543234ae9acdc71128a6b01741a1079d87 /drivers/char/tpm | |
| parent | fea087fc291b102521427c26da3d0a30c329606f (diff) | |
| download | linux-6b301ded45a6d9538f5f579a2e9f4b6c45fa988b.tar.gz | |
tpm: Fix a possible dereference of ERR_PTR in tpm_init()
Smatch reports:
drivers/char/tpm/tpm-interface.c:470 tpm_init() error:
'tpm_class' dereferencing possible ERR_PTR()
If class_create() returns error pointer, we are dereferencing a possible
error pointer. Fix this by moving the dereference post error handling.
Fixes: a010eb881243 ("tpm: fix up the tpm_class shutdown_pre pointer when created")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Link: https://lore.kernel.org/r/20230321061416.626561-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 43e23a04433a2..4463d00182909 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -467,12 +467,13 @@ static int __init tpm_init(void) int rc; tpm_class = class_create("tpm"); - tpm_class->shutdown_pre = tpm_class_shutdown; if (IS_ERR(tpm_class)) { pr_err("couldn't create tpm class\n"); return PTR_ERR(tpm_class); } + tpm_class->shutdown_pre = tpm_class_shutdown; + tpmrm_class = class_create("tpmrm"); if (IS_ERR(tpmrm_class)) { pr_err("couldn't create tpmrm class\n"); |