Re: [PATCH] slab: remove __alloc_size attribute from __kmalloc_track_caller

[David Rientjes]

On Fri, 18 Feb 2022, Greg Kroah-Hartman wrote:

> Commit c37495d6254c ("slab: add __alloc_size attributes for better
> bounds checking") added __alloc_size attributes to a bunch of kmalloc
> function prototypes.  Unfortunately the change to __kmalloc_track_caller
> seems to cause clang to generate broken code and the first time this is
> called when booting, the box will crash.
> 
> While the compiler problems are being reworked and attempted to be
> solved, let's just drop the attribute to solve the issue now.  Once it
> is resolved it can be added back.
> 
> Fixes: c37495d6254c ("slab: add __alloc_size attributes for better bounds checking")
> Cc: stable <stable@xxxxxxxxxxxxxxx>
> Cc: Kees Cook <keescook@xxxxxxxxxxxx>
> Cc: Daniel Micay <danielmicay@xxxxxxxxx>
> Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
> Cc: Christoph Lameter <cl@xxxxxxxxx>
> Cc: Pekka Enberg <penberg@xxxxxxxxxx>
> Cc: David Rientjes <rientjes@xxxxxxxxxx>
> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Vlastimil Babka <vbabka@xxxxxxx>
> Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
> Cc: linux-mm@xxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: llvm@xxxxxxxxxxxxxxx
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

Acked-by: David Rientjes <rientjes@xxxxxxxxxx>