diff options
| author | Peng Fan <peng.fan@nxp.com> | 2025-10-28 22:23:32 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-10-29 13:37:00 +0100 |
| commit | 65df3a9629c10d70593bc90b2ca6b235b7a24909 (patch) | |
| tree | dd9f3866756fd49f3d6e3b8355227ee2fe463d66 /net/unix/af_unix.c | |
| parent | a1b17c9ac87a21b677077bc47d7579a2897a13f3 (diff) | |
PM: EM: Add to em_pd_list only when no failure
When em_create_perf_table() returns failure, pd is freed, there dev->em_pd
is not valid. Then accessing dev->em_pd->node will trigger kernel panic
in em_dev_register_pd_no_update(). So return early if 'ret' is non-zero.
Kernel dump:
cpu cpu0: EM: invalid power: 0
Unable to handle kernel NULL pointer dereference at virtual address
0000000000000008
Mem abort info:
pc : em_dev_register_pd_no_update+0xb4/0x79c
lr : em_dev_register_pd_no_update+0x9c/0x79c
Call trace:
em_dev_register_pd_no_update+0xb4/0x79c (P)
em_dev_register_perf_domain+0x18/0x58
scmi_cpufreq_register_em+0x84/0xb8
cpufreq_online+0x48c/0xb74
cpufreq_add_dev+0x80/0x98
subsys_interface_register+0x100/0x11c
cpufreq_register_driver+0x158/0x278
scmi_cpufreq_probe+0x1f8/0x2e0
scmi_dev_probe+0x28/0x3c
really_probe+0xbc/0x29c
__driver_probe_device+0x78/0x12c
driver_probe_device+0x3c/0x15c
__device_attach_driver+0xb8/0x134
bus_for_each_drv+0x84/0xe4
Fixes: cbe5aeedecc7 ("PM: EM: Assign a unique ID when creating a performance domain")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Changwoo Min <changwoo@igalia.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/20251028-fix-energy-v1-1-ab854fd6a97c@nxp.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions