Michael J. Ruhl 71ff3384d1 IB/hfi1: Remove overly conservative VM_EXEC flag check ... commit 7709b0dc26 upstream. Applications that use the stack for execution purposes cause userspace PSM jobs to fail during mmap(). Both Fortran (non-standard format parsing) and C (callback functions located in the stack) applications can be written such that stack execution is required. The linker notes this via the gnu_stack ELF flag. This causes READ_IMPLIES_EXEC to be set which forces all PROT_READ mmaps to have PROT_EXEC for the process. Checking for VM_EXEC bit and failing the request with EPERM is overly conservative and will break any PSM application using executable stacks. Cc: <stable@vger.kernel.org> #v4.14+ Fixes: 1222026764 ("IB/hfi: Protect against writable mmap") Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-02-06 17:30:13 +01:00
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core	RDMA/nldev: Don't expose unsafe global rkey to regular user	2019-01-22 21:40:34 +01:00
hw	IB/hfi1: Remove overly conservative VM_EXEC flag check	2019-02-06 17:30:13 +01:00
sw	rxe: IB_WR_REG_MR does not capture MR's iova field	2019-01-26 09:32:36 +01:00
ulp	RDMA/srpt: Fix a use-after-free in the channel release code	2019-01-13 09:51:09 +01:00
Kconfig	IB/ucm: fix UCM link error	2018-08-21 16:56:32 -06:00
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