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authorKees Cook <keescook@chromium.org>2022-03-24 15:57:25 -0700
committerKees Cook <keescook@chromium.org>2022-03-24 15:57:25 -0700
commitef3e787c21d1efcd297f0cf2e9535e76188fb831 (patch)
tree54625db836e2ddb7aa5fc8de24757cf954df68d0
parentafcf5441b9ff22ac57244cd45ff102ebc2e32d1a (diff)
usercopy: Disable CONFIG_HARDENED_USERCOPY_PAGESPAN
CONFIG_HARDENED_USERCOPY_PAGESPAN has been mostly broken for a while, and it has become hard to ignore with some recent scsi changes[1]. While there is a more complete series to replace it with better checks[2], it should have more soak time in -next. Instead, disable the config now, with the expectation that it will be fully replaced in the next kernel release. [1] https://lore.kernel.org/lkml/20220324064846.GA12961@lst.de/ [2] https://lore.kernel.org/linux-hardening/20220110231530.665970-1-willy@infradead.org/ Suggested-by: Christoph Hellwig <hch@lst.de> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Signed-off-by: Kees Cook <keescook@chromium.org>
-rw-r--r--security/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/security/Kconfig b/security/Kconfig
index 0b847f435beb..88a0bc8c592b 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -166,7 +166,7 @@ config HARDENED_USERCOPY
config HARDENED_USERCOPY_PAGESPAN
bool "Refuse to copy allocations that span multiple pages"
depends on HARDENED_USERCOPY
- depends on EXPERT
+ depends on BROKEN
help
When a multi-page allocation is done without __GFP_COMP,
hardened usercopy will reject attempts to copy it. There are,