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gpu: nvgpu: fix ecc counter free

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ECC counter structures are freed without removing the node from the
stats_list. This can lead to invalid access due to dangling pointers.

Update the ecc counter free logic to set them to NULL upon free, to
remove them from stats_list and free them by validation.

Also updated some of the ecc init paths where error was not propa-
gated to callers and full ecc counters deallocation was not done.

Now, calling unit ecc_free from any context (with counters alloc-
ated or not) is harmless as requisite checks are in place.

bug 3326612
bug 3345977

Change-Id: I05eb6ed226cff9197ad37776912da9dcb7e0716d
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2565264
Tested-by: Ashish Mhetre <amhetre@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Sagar Kamble
2021-06-17 11:34:36 +05:30
committed by mobile promotions
parent 2887d06e3b
commit 40064ef1ec
33 changed files with 546 additions and 218 deletions
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15
userspace/units/ecc/nvgpu-ecc.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2019-2021, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -121,7 +121,7 @@ int test_ecc_counter_init(struct unit_module *m, struct gk20a *g,
ret = UNIT_FAIL;
goto cleanup;
}
nvgpu_kfree(g, stat);
nvgpu_ecc_counter_deinit(g, &stat);
/*
* Case #2:
@@ -147,12 +147,17 @@ int test_ecc_counter_init(struct unit_module *m, struct gk20a *g,
ret = UNIT_FAIL;
goto cleanup;
}
nvgpu_kfree(g, stat);
stat = NULL;
nvgpu_ecc_counter_deinit(g, &stat);
if (!nvgpu_list_empty(&g->ecc.stats_list)) {
ret = UNIT_FAIL;
goto cleanup;
}
cleanup:
if (stat != NULL) {
nvgpu_kfree(g, stat);
nvgpu_ecc_counter_deinit(g, &stat);
}
nvgpu_kfree(g, name);

4
userspace/units/ecc/nvgpu-ecc.h
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2019-2021, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -110,6 +110,8 @@ int test_ecc_finalize_support(struct unit_module *m,
* - Set counter name to string with invalid length equal to
* NVGPU_ECC_STAT_NAME_MAX_SIZE.
* - "nvgpu_ecc_counter_init" will truncate the counter name and return 0.
* - Test case #4
* - Verify that the g->ecc.stats_list is empty.
*
* Output:
* - UNIT_FAIL under the following conditions: