On 2/12/25 09:15, GONG Ruiqi wrote: > Hi, > > v3: > - move all the way from kmalloc_gfp_adjust to kvrealloc_noprof into > mm/slub.c > - some rewording for commit logs > v2: https://lore.kernel.org/all/20250208014723.1514049-1-gongruiqi1@xxxxxxxxxx/ > - change the implementation as Vlastimil suggested > v1: https://lore.kernel.org/all/20250122074817.991060-1-gongruiqi1@xxxxxxxxxx/ > > Tamás reported [1] that kmalloc cache randomization doesn't actually > work for those kmalloc invoked via kvmalloc. For more details, see the > commit log of patch 2. > > The current solution requires a direct call from __kvmalloc_node_noprof > to __do_kmalloc_node, a static function in a different .c file. As > suggested by Vlastimil [2], it's achieved by simply moving > __kvmalloc_node_noprof from mm/util.c to mm/slub.c, together with some > other functions of the same family. > > Link: https://github.com/google/security-research/blob/908d59b573960dc0b90adda6f16f7017aca08609/pocs/linux/kernelctf/CVE-2024-27397_mitigation/docs/exploit.md?plain=1#L259 [1] > Link: https://lore.kernel.org/all/62044279-0c56-4185-97f7-7afac65ff449@xxxxxxx/ [2] > > GONG Ruiqi (2): > slab: Adjust placement of __kvmalloc_node_noprof > slab: Achieve better kmalloc caches randomization in kvmalloc Applied to slab/for-next, thanks! > > mm/slub.c | 162 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ > mm/util.c | 162 ------------------------------------------------------ > 2 files changed, 162 insertions(+), 162 deletions(-) >
