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| author | Fan Wu <fanwu01@zju.edu.cn> | 2026-08-20 13:53:06 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-09-01 16:50:04 +0200 |
| commit | 263f7d61a4201cde16849b2d016251806e7418be (patch) | |
| tree | 861df7c5b878b85741cf319ece81111b4c41c3b1 /security/bpf | |
| download | linux-stable-263f7d61a4201cde16849b2d016251806e7418be.tar.gz linux-stable-263f7d61a4201cde16849b2d016251806e7418be.zip | |
usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stopgrafted
cc_debounce_dwork is queued from the set_cc() and start_toggling()
callbacks, which run from TCPM's kthread worker. port_stop() returns
before tcpm_unregister_port() destroys that worker. Flushing the worker
during unregister may therefore run a callback which queues the delayed
work after port_stop() has returned.
The delayed work can then run after devres has freed pmic_typec_port.
Use disable_delayed_work_sync() in port_stop() to cancel a pending
instance and prevent the TCPM callbacks from queueing another one.
This issue was found by an in-house static analysis tool.
Fixes: a4422ff22142 ("usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
Cc: stable <stable@kernel.org> # v6.10+
Assisted-by: Codex:gpt-5.6
Signed-off-by: Fan Wu <fanwu01@zju.edu.cn>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260820135307.153773-2-fanwu01@zju.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security/bpf')
| -rw-r--r-- | security/bpf/Makefile | 5 | ||||
| -rw-r--r-- | security/bpf/hooks.c | 42 |
2 files changed, 47 insertions, 0 deletions
diff --git a/security/bpf/Makefile b/security/bpf/Makefile new file mode 100644 index 000000000..c7a89a962 --- /dev/null +++ b/security/bpf/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2020 Google LLC. + +obj-$(CONFIG_BPF_LSM) := hooks.o diff --git a/security/bpf/hooks.c b/security/bpf/hooks.c new file mode 100644 index 000000000..7b98f5d1e --- /dev/null +++ b/security/bpf/hooks.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Copyright (C) 2020 Google LLC. + */ +#include <linux/lsm_hooks.h> +#include <linux/bpf_lsm.h> +#include <uapi/linux/lsm.h> + +bool bpf_lsm_initialized __ro_after_init; + +static struct security_hook_list bpf_lsm_hooks[] __ro_after_init = { + #define LSM_HOOK(RET, DEFAULT, NAME, ...) \ + LSM_HOOK_INIT(NAME, bpf_lsm_##NAME), + #include <linux/lsm_hook_defs.h> + #undef LSM_HOOK + LSM_HOOK_INIT(inode_free_security, bpf_inode_storage_free), +}; + +static const struct lsm_id bpf_lsmid = { + .name = "bpf", + .id = LSM_ID_BPF, +}; + +static int __init bpf_lsm_init(void) +{ + security_add_hooks(bpf_lsm_hooks, ARRAY_SIZE(bpf_lsm_hooks), + &bpf_lsmid); + bpf_lsm_initialized = true; + pr_info("LSM support for eBPF active\n"); + return 0; +} + +struct lsm_blob_sizes bpf_lsm_blob_sizes __ro_after_init = { + .lbs_inode = sizeof(struct bpf_storage_blob), +}; + +DEFINE_LSM(bpf) = { + .id = &bpf_lsmid, + .init = bpf_lsm_init, + .blobs = &bpf_lsm_blob_sizes +}; |