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This pull request contains two critical bug fixes, which can be briefly
descibed as follows:
1. key_get_persistent() creates a new persisten keyring for UID if it does
not exist yet, and creates a link from it to the nominated keyring.
Function did not set timeout when linking failed, therefore preventing
GC. The bug was addressed by calling key_set_timeout() regardless of
key_link() result when the persistent keyring gets created by
key_get_persistent().
2. __key_create_or_update() made a copy of keyring->restrict_link before
holding keyring->sem, which can cause add_key() to be executed against
stale keyring restrictions. The bug was fixed by copying the value only
after keyring->sem was taken.
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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Merge tag 'keys-v7.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull keys fixes from Jarkko Sakkinen:
- key_get_persistent() created a new persistent keyring if one did not
exist, but failed to set a timeout on it in an error path, preventing
GC.
Call key_set_timeout() regardless of key_link() result if a
persistent keyring was created.
- __key_create_or_update() made a copy of keyring->restrict_link before
holding keyring->sem, which could cause add_key() to be executed
against stale keyring restrictions. Fix it by copying the value only
after taking keyring->sem
* tag 'keys-v7.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
KEYS: Fix add_key() race with keyring restriction
keys: finalize persistent keyring timeout after link attempt
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|---|---|---|
| .. | ||
| apparmor | ||
| bpf | ||
| integrity | ||
| ipe | ||
| keys | ||
| landlock | ||
| loadpin | ||
| lockdown | ||
| safesetid | ||
| selinux | ||
| smack | ||
| tomoyo | ||
| yama | ||
| commoncap_test.c | ||
| commoncap.c | ||
| device_cgroup.c | ||
| inode.c | ||
| Kconfig | ||
| Kconfig.hardening | ||
| lsm_audit.c | ||
| lsm_init.c | ||
| lsm_notifier.c | ||
| lsm_syscalls.c | ||
| lsm.h | ||
| Makefile | ||
| min_addr.c | ||
| security.c | ||