Re: [PATCH v2] powerpc/mm: Fix set_memory_*() against concurrent accesses

2021-08-27 Thread Michael Ellerman
On Wed, 18 Aug 2021 22:05:18 +1000, Michael Ellerman wrote: > Laurent reported that STRICT_MODULE_RWX was causing intermittent crashes > on one of his systems: > > kernel tried to execute exec-protected page (c00804073278) - exploit > attempt? (uid: 0) > BUG: Unable to handle kernel

Re: [PATCH v2] powerpc/mm: Fix set_memory_*() against concurrent accesses

2021-08-18 Thread Laurent Vivier
On 18/08/2021 14:05, Michael Ellerman wrote: > Laurent reported that STRICT_MODULE_RWX was causing intermittent crashes > on one of his systems: > > kernel tried to execute exec-protected page (c00804073278) - exploit > attempt? (uid: 0) > BUG: Unable to handle kernel instruction fetch >

Re: [PATCH v2] powerpc/mm: Fix set_memory_*() against concurrent accesses

2021-08-18 Thread Murilo Opsfelder Araújo
On 8/18/21 9:05 AM, Michael Ellerman wrote: Laurent reported that STRICT_MODULE_RWX was causing intermittent crashes on one of his systems: kernel tried to execute exec-protected page (c00804073278) - exploit attempt? (uid: 0) BUG: Unable to handle kernel instruction fetch

Re: [PATCH v2] powerpc/mm: Fix set_memory_*() against concurrent accesses

2021-08-18 Thread Christophe Leroy
Le 18/08/2021 à 14:05, Michael Ellerman a écrit : Laurent reported that STRICT_MODULE_RWX was causing intermittent crashes on one of his systems: kernel tried to execute exec-protected page (c00804073278) - exploit attempt? (uid: 0) BUG: Unable to handle kernel instruction fetch

[PATCH v2] powerpc/mm: Fix set_memory_*() against concurrent accesses

2021-08-18 Thread Michael Ellerman
Laurent reported that STRICT_MODULE_RWX was causing intermittent crashes on one of his systems: kernel tried to execute exec-protected page (c00804073278) - exploit attempt? (uid: 0) BUG: Unable to handle kernel instruction fetch Faulting instruction address: 0xc00804073278 Oops: