diff options
| author | Suren Baghdasaryan <[email protected]> | 2024-03-21 09:36:57 -0700 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-04-25 20:55:58 -0700 |
| commit | 09c46563ff6d5f090211e48ff1fdba0ec7f4c97f (patch) | |
| tree | 55ca7c5011c521a2d2c45e17caee762e4782abcf /include/linux | |
| parent | d224eb0287fbd84f4f13eca042c7f08f87138f3b (diff) | |
codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations
If slabobj_ext vector allocation for a slab object fails and later on it
succeeds for another object in the same slab, the slabobj_ext for the
original object will be NULL and will be flagged in case when
CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled.
Mark failed slabobj_ext vector allocations using a new objext_flags flag
stored in the lower bits of slab->obj_exts. When new allocation succeeds
it marks all tag references in the same slabobj_ext vector as empty to
avoid warnings implemented by CONFIG_MEM_ALLOC_PROFILING_DEBUG checks.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Suren Baghdasaryan <[email protected]>
Tested-by: Kees Cook <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Alex Gaynor <[email protected]>
Cc: Alice Ryhl <[email protected]>
Cc: Andreas Hindborg <[email protected]>
Cc: Benno Lossin <[email protected]>
Cc: "Björn Roy Baron" <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Dennis Zhou <[email protected]>
Cc: Gary Guo <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Wedson Almeida Filho <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/memcontrol.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 24a6df30be49..8f332b4ae84c 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -366,8 +366,10 @@ enum page_memcg_data_flags { #endif /* CONFIG_MEMCG */ enum objext_flags { + /* slabobj_ext vector failed to allocate */ + OBJEXTS_ALLOC_FAIL = __FIRST_OBJEXT_FLAG, /* the next bit after the last actual flag */ - __NR_OBJEXTS_FLAGS = __FIRST_OBJEXT_FLAG, + __NR_OBJEXTS_FLAGS = (__FIRST_OBJEXT_FLAG << 1), }; #define OBJEXTS_FLAGS_MASK (__NR_OBJEXTS_FLAGS - 1) |