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| author |   Christian Borntraeger <borntraeger@de.ibm.com> | 2020-03-31 05:57:23 -0400 |
|---|---|---|
| committer |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2020-06-23 14:05:55 +0200 |
| commit | 827c4913923e0b441ba07ba4cc41e01181102303 (patch) | |
| tree | 01f68e4352a1658e4517f319980ebc671fe9137b /arch/s390/kernel/debug.c | |
| parent | s390/kasan: fix early pgm check handler execution (diff) | |
| download | linux-dev-827c4913923e0b441ba07ba4cc41e01181102303.tar.xz linux-dev-827c4913923e0b441ba07ba4cc41e01181102303.zip | |
s390/debug: avoid kernel warning on too large number of pages
When specifying insanely large debug buffers a kernel warning is
printed. The debug code does handle the error gracefully, though.
Instead of duplicating the check let us silence the warning to
avoid crashes when panic_on_warn is used.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/debug.c')
| -rw-r--r-- | arch/s390/kernel/debug.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c index 636446003a06..263075a1af36 100644 --- a/arch/s390/kernel/debug.c +++ b/arch/s390/kernel/debug.c @@ -198,9 +198,10 @@ static debug_entry_t ***debug_areas_alloc(int pages_per_area, int nr_areas) if (!areas) goto fail_malloc_areas; for (i = 0; i < nr_areas; i++) { + /* GFP_NOWARN to avoid user triggerable WARN, we handle fails */ areas[i] = kmalloc_array(pages_per_area, sizeof(debug_entry_t *), - GFP_KERNEL); + GFP_KERNEL | __GFP_NOWARN); if (!areas[i]) goto fail_malloc_areas2; for (j = 0; j < pages_per_area; j++) { |