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powerpc fixes for 6.5 #6

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- Fix hardened usercopy BUG when using /proc based firmware update interface.
 
 Thanks to: Nathan Lynch, Kees Cook.
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Merge tag 'powerpc-6.5-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:

 - Fix hardened usercopy BUG when using /proc based firmware update
   interface

Thanks to Nathan Lynch and Kees Cook.

* tag 'powerpc-6.5-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/rtas_flash: allow user copy to flash block cache objects
This commit is contained in:
Linus Torvalds 2023-08-19 08:32:16 +02:00
commit 4e7ffde698
1 changed files with 3 additions and 3 deletions
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6
arch/powerpc/kernel/rtas_flash.c
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@ -709,9 +709,9 @@ static int __init rtas_flash_init(void)
if (!rtas_validate_flash_data.buf)
return -ENOMEM;
flash_block_cache = kmem_cache_create("rtas_flash_cache",
RTAS_BLK_SIZE, RTAS_BLK_SIZE, 0,
NULL);
flash_block_cache = kmem_cache_create_usercopy("rtas_flash_cache",
RTAS_BLK_SIZE, RTAS_BLK_SIZE,
0, 0, RTAS_BLK_SIZE, NULL);
if (!flash_block_cache) {
printk(KERN_ERR "%s: failed to create block cache\n",
__func__);