From: Anton Vasilyev <vasilyev@xxxxxxxxx>
[ Upstream commit 45ca3f76de0507ecf143f770570af2942f263812 ]
static struct ro_vpd and rw_vpd are initialized by vpd_sections_init()
in vpd_probe() based on header's ro and rw sizes.
In vpd_remove() vpd_section_destroy() performs deinitialization based
on enabled flag, which is set to true by vpd_sections_init().
This leads to call of vpd_section_destroy() on already destroyed section
for probe-release-probe-release sequence if first probe performs
ro_vpd initialization and second probe does not initialize it.
The patch adds changing enabled flag on vpd_section_destroy and adds
cleanup on the error path of vpd_sections_init.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Anton Vasilyev <vasilyev@xxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
drivers/firmware/google/vpd.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/firmware/google/vpd.c b/drivers/firmware/google/vpd.c
index e4b40f2b4627..9c0f7cf920af 100644
--- a/drivers/firmware/google/vpd.c
+++ b/drivers/firmware/google/vpd.c
@@ -246,6 +246,7 @@ static int vpd_section_destroy(struct vpd_section *sec)
sysfs_remove_bin_file(vpd_kobj, &sec->bin_attr);
kfree(sec->raw_name);
memunmap(sec->baseaddr);
+ sec->enabled = false;
}
return 0;
@@ -279,8 +280,10 @@ static int vpd_sections_init(phys_addr_t physaddr)
ret = vpd_section_init("rw", &rw_vpd,
physaddr + sizeof(struct vpd_cbmem) +
header.ro_size, header.rw_size);
- if (ret)
+ if (ret) {
+ vpd_section_destroy(&ro_vpd);
return ret;
+ }
}
return 0;
--
2.17.1
