The patch titled
Subject: fixup! kfence: limit currently covered allocations when pool nearly full
has been added to the -mm tree. Its filename is
kfence-limit-currently-covered-allocations-when-pool-nearly-full-fix-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/kfence-limit-currently-covered-allocations-when-pool-nearly-full-fix-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/kfence-limit-currently-covered-allocations-when-pool-nearly-full-fix-fix.patch
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------------------------------------------------------
From: Marco Elver <elver@xxxxxxxxxx>
Subject: fixup! kfence: limit currently covered allocations when pool nearly full
Fix 32 bit. size_t is UL on 64-bit only; just cast it to size_t
mm/kfence/core.c: In function `get_alloc_stack_hash':
./include/linux/minmax.h:20:28: warning: comparison of distinct pointer types lacks a cast
20 | (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
| ^~
./include/linux/minmax.h:26:4: note: in expansion of macro `__typecheck'
26 | (__typecheck(x, y) && __no_side_effects(x, y))
| ^~~~~~~~~~~
./include/linux/minmax.h:36:24: note: in expansion of macro `__safe_cmp'
36 | __builtin_choose_expr(__safe_cmp(x, y), \
| ^~~~~~~~~~
./include/linux/minmax.h:45:19: note: in expansion of macro `__careful_cmp'
45 | #define min(x, y) __careful_cmp(x, y, <)
| ^~~~~~~~~~~~~
mm/kfence/core.c:177:16: note: in expansion of macro `min'
177 | num_entries = min(num_entries, UNIQUE_ALLOC_STACK_DEPTH);
| ^~~
Link: https://lkml.kernel.org/r/YVQ0fE4Yil2EX8FI@xxxxxxxxxxxxxxxx
Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
Reported-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kfence/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/kfence/core.c~kfence-limit-currently-covered-allocations-when-pool-nearly-full-fix-fix
+++ a/mm/kfence/core.c
@@ -130,7 +130,7 @@ atomic_t kfence_allocation_gate = ATOMIC
static atomic_t alloc_covered[ALLOC_COVERED_SIZE];
/* Stack depth used to determine uniqueness of an allocation. */
-#define UNIQUE_ALLOC_STACK_DEPTH 8UL
+#define UNIQUE_ALLOC_STACK_DEPTH ((size_t)8)
/*
* Randomness for stack hashes, making the same collisions across reboots and
_
Patches currently in -mm which might be from elver@xxxxxxxxxx are
lib-stackdepot-include-gfph.patch
lib-stackdepot-remove-unused-function-argument.patch
lib-stackdepot-introduce-__stack_depot_save.patch
kasan-common-provide-can_alloc-in-kasan_save_stack.patch
kasan-generic-introduce-kasan_record_aux_stack_noalloc.patch
workqueue-kasan-avoid-alloc_pages-when-recording-stack.patch
mm-fix-data-race-in-pagepoisoned.patch
stacktrace-move-filter_irq_stacks-to-kernel-stacktracec.patch
kfence-count-unexpectedly-skipped-allocations.patch
kfence-move-saving-stack-trace-of-allocations-into-__kfence_alloc.patch
kfence-limit-currently-covered-allocations-when-pool-nearly-full.patch
kfence-limit-currently-covered-allocations-when-pool-nearly-full-fix.patch
kfence-limit-currently-covered-allocations-when-pool-nearly-full-fix-fix.patch
kfence-add-note-to-documentation-about-skipping-covered-allocations.patch
kfence-test-use-kunit_skip-to-skip-tests.patch
