On Thu, Feb 02, 2023 at 12:16:52PM -0500, Sasha Levin wrote:
On Wed, Feb 01, 2023 at 08:42:38PM -0800, Eric Biggers wrote:
This series backports the patchset
"exit: Put an upper limit on how often we can oops"
(https://lore.kernel.org/linux-mm/20221117233838.give.484-kees@xxxxxxxxxx/T/#u)
to 5.4, as recommended at
https://googleprojectzero.blogspot.com/2023/01/exploiting-null-dereferences-in-linux.html
This follows the backports to 5.10 and 5.15 which already released.
This required backporting various prerequisite patches.
I've tested that oops_limit and warn_limit work correctly on x86_64.
Queued up all 3 backports, thanks!
... and proceeded to drop the 4.19 and 4.14 backports which fail to
build:
mm/kasan/report.c: In function 'kasan_end_report':
mm/kasan/report.c:175:16: error: 'KASAN_BIT_MULTI_SHOT' undeclared (first use in this function)
175 | if (!test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
--
Thanks,
Sasha
