github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-11-06 21:58:01 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

tpm: Fix auth session leak in tpm2_get_random() error path

Browse Source 
When tpm_buf_fill_hmac_session() fails in tpm2_get_random(), the error
path returns without calling tpm2_end_auth_session(), leaking the auth
session. All other error paths in the function handle this correctly.

Fixes: 3d9e043dab ("tpm-buf: Memory-safe allocations")
Cc: stable@vger.kernel.orga # v6.12+
Signed-off-by: Jiangshan Yi <yijiangshan@kylinos.cn>
Link: https://lore.kernel.org/r/20260902074839.417419-1-yijiangshan@kylinos.cn
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
Jiangshan Yi 2026-09-02 15:48:39 +08:00 committed by Jarkko Sakkinen
parent 1a70f0b718
commit 1e2f9a611b
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/char/tpm/tpm2-cmd.c
View File

@ -281,8 +281,10 @@ int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max)
}
tpm_buf_append_u16(buf, num_bytes);
err = tpm_buf_fill_hmac_session(chip, buf);
if (err)
if (err) {
tpm2_end_auth_session(chip);
return err;
}
err = tpm_transmit_cmd(chip, buf,
offsetof(struct tpm2_get_random_out,