The function parse_lfp_panel_dtd() is called when the driver
attempts to initialize the eDP connector, and it allocates memory,
which is recorded in panel->vbt.lfp_vbt_mode. However, since no
eDP panel is connected, the driver fails at intel_edp_init_dpcd()
and follows the failure path. Unfortunately, the allocated memory
is not freed in this case.
To fix this issue, free the memory in the failure path.
leak info from kmemleak:
"
unreferenced object 0xffff8881252f8800 (size 128):
comm "systemd-udevd", pid 192, jiffies 4294896880
hex dump (first 32 bytes):
e8 fd 00 00 00 04 18 04 a0 04 40 05 00 00 00 03 ..........@.....
03 03 09 03 26 03 00 00 0a 00 00 00 00 00 00 00 ....&...........
backtrace (crc 7448f6b4):
[<ffffffff82475c9b>] kmemleak_alloc+0x4b/0x80
[<ffffffff814bb50e>] __kmalloc_cache_noprof+0x2be/0x390
[<ffffffffa069862c>] intel_bios_init_panel+0x1c4c/0x2720 [xe]
[<ffffffffa0699123>] intel_bios_init_panel_early+0x13/0x20 [xe]
[<ffffffffa06fceb9>] intel_dp_init_connector+0x2f9/0x1080 [xe]
[<ffffffffa06c370a>] intel_ddi_init+0xbba/0xf50 [xe]
[<ffffffffa069b906>] intel_bios_for_each_encoder+0x36/0x60 [xe]
[<ffffffffa06d7bd6>] intel_setup_outputs+0x206/0x450 [xe]
[<ffffffffa06dad33>] intel_display_driver_probe_nogem+0x163/0x1f0 [xe]
[<ffffffffa0680fc7>] xe_display_init_noaccel+0x27/0x70 [xe]
[<ffffffffa05b30d6>] xe_device_probe+0x806/0x9a0 [xe]
[<ffffffffa0612f0f>] xe_pci_probe+0x31f/0x590 [xe]
[<ffffffff81b41718>] local_pci_probe+0x48/0xb0
[<ffffffff81b432c8>] pci_device_probe+0xc8/0x280
[<ffffffff81d5dde8>] really_probe+0xf8/0x390
[<ffffffff81d5e11a>] __driver_probe_device+0x8a/0x170
"
Signed-off-by: Shuicheng Lin <shuicheng.lin@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 90fa73575feb..39ad71454d2b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -6801,6 +6801,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
out_vdd_off:
intel_pps_vdd_off_sync(intel_dp);
+ intel_panel_fini(intel_connector);
return false;
}
--
2.25.1
