[PATCH v6 0/2] Restrict xmon when kernel is locked down

Xmon should be either fully or partially disabled depending on the kernel lockdown state. Put xmon into read-only mode for lockdown=integrity and completely disable xmon when lockdown=confidentiality. Since this can occur dynamically, there may be pre-existing, active breakpoints in xmon when tran

[PATCH v6 2/2] powerpc/xmon: Restrict when kernel is locked down

Xmon should be either fully or partially disabled depending on the kernel lockdown state. Put xmon into read-only mode for lockdown=integrity and prevent user entry into xmon when lockdown=confidentiality. Xmon checks the lockdown state on every attempted entry: (1) during early xmon'ing (2) w

Re: [PATCH v7 1/7] kvmppc: Driver to manage pages of secure guest

On Thu, Aug 29, 2019 at 10:38:10AM +0200, Christoph Hellwig wrote: > On Thu, Aug 22, 2019 at 03:56:14PM +0530, Bharata B Rao wrote: > > +/* > > + * Bits 60:56 in the rmap entry will be used to identify the > > + * different uses/functions of rmap. > > + */ > > +#define KVMPPC_RMAP_DEVM_PFN (0

Re: [PATCH v2 1/2] kasan: support instrumented bitops combined with generic bitops

Daniel Axtens writes: > Currently bitops-instrumented.h assumes that the architecture provides > atomic, non-atomic and locking bitops (e.g. both set_bit and __set_bit). > This is true on x86 and s390, but is not always true: there is a > generic bitops/non-atomic.h header that provides generic n

Re: [PATCH v5 3/5] powerpc/64: make buildable without CONFIG_COMPAT

On 08/29/2019 10:28 PM, Michal Suchanek wrote: > There are numerous references to 32bit functions in generic and 64bit > code so ifdef them out. > > Signed-off-by: Michal Suchanek > --- > v2: > - fix 32bit ifdef condition in signal.c > - simplify the compat ifdef condition in vdso.c - 64bit is re

Re: [PATCH v5 5/5] powerpc/perf: split callchain.c by bitness

On 08/29/2019 10:28 PM, Michal Suchanek wrote: > Building callchain.c with !COMPAT proved quite ugly with all the > defines. Splitting out the 32bit and 64bit parts looks better. > > Also rewrite current_is_64bit as common function. No other code change > intended. Nice result. Could look even b

Re: [PATCH v5 5/5] powerpc/perf: split callchain.c by bitness

On Fri, 30 Aug 2019 06:35:11 + (UTC) Christophe Leroy wrote: > On 08/29/2019 10:28 PM, Michal Suchanek wrote: > > Building callchain.c with !COMPAT proved quite ugly with all the > > defines. Splitting out the 32bit and 64bit parts looks better. > > > > Also rewrite current_is_64bit as commo

Oops (request_key_auth_describe) while running cve-2016-7042 from LTP

While running LTP tests (specifically cve-2016-7042) against 5.3-rc6 (commit 4a64489cf8) on a POWER9 LPAR, following problem is seen [ 3373.814425] FS-Cache: Netfs 'nfs' registered for caching [ 7695.250230] Clock: inserting leap second 23:59:60 UTC [ 8074.351033] BUG: Kernel NULL pointer derefere

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