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| author | Helge Deller <deller@gmx.de> | 2025-10-09 23:37:28 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2025-10-09 23:45:04 +0200 |
| commit | f4edb5c52c93b1bc676064472fb517566a3e2129 (patch) | |
| tree | 94edf3f334fa82c73822e08d601ae062c4da4931 /arch | |
| parent | parisc: Firmware: Fix returned path for PDC_MODULE_FIND on older machines (diff) | |
| download | linux-f4edb5c52c93b1bc676064472fb517566a3e2129.tar.gz linux-f4edb5c52c93b1bc676064472fb517566a3e2129.zip | |
parisc: Fix iodc and device path return values on old machines
Older machines may not fully initialize the return values when asking for IODC
and device path data when building the inventory. Work around possible
firmware leaks by proper initialization of the variables.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/parisc/kernel/drivers.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c index 1e793f770f71..1f8936fc2292 100644 --- a/arch/parisc/kernel/drivers.c +++ b/arch/parisc/kernel/drivers.c @@ -995,6 +995,7 @@ static __init int qemu_print_iodc_data(struct device *lin_dev, void *data) struct pdc_system_map_mod_info pdc_mod_info; struct pdc_module_path mod_path; + memset(&iodc_data, 0, sizeof(iodc_data)); status = pdc_iodc_read(&count, hpa, 0, &iodc_data, sizeof(iodc_data)); if (status != PDC_OK) { @@ -1012,6 +1013,11 @@ static __init int qemu_print_iodc_data(struct device *lin_dev, void *data) mod_index = 0; do { + /* initialize device path for old machines */ + memset(&mod_path, 0xff, sizeof(mod_path)); + get_node_path(dev->dev.parent, &mod_path.path); + mod_path.path.mod = dev->hw_path; + memset(&pdc_mod_info, 0, sizeof(pdc_mod_info)); status = pdc_system_map_find_mods(&pdc_mod_info, &mod_path, mod_index++); } while (status == PDC_OK && pdc_mod_info.mod_addr != hpa); |