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* shm: Respect PROT_MAX when creating private mappingsMark Johnston2024-10-041-1/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | We were previously unconditionally adding PROT_WRITE to the maxprot of private mapping (because a private mapping can be written even if the fd is read-only), but this might violate the user's PROT_MAX request. While here, rename cap_maxprot to max_maxprot. This is the intersection of the maximum protections imposed by capsicum rights on the fd (not really relevant for private mappings) and the user-required maximum protections (which were not being obeyed). In particular, cap_maxprot is a misnomer after the introduction of PROT_MAX. Add some regression test cases. mmap__maxprot_shm fails without this patch. Note: Capsicum's CAP_MMAP_W is a bit ambiguous. Should it be required in order to create writeable private mappings? Currently it is, even though such mappings don't permit writes to the object referenced by the fd. Reported by: brooks Reviewed by: brooks MFC after: 1 month Fixes: c7841c6b8e41 ("Relax restrictions on private mappings of POSIX shm objects.") Differential Revision: https://reviews.freebsd.org/D46741
* Remove $FreeBSD$: two-line .h patternWarner Losh2023-08-161-2/+0
| | | | Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/
* mmap map_at_zero test: handle W^XArka Sharma2022-02-211-2/+25
| | | | | | | | | | | Use kern.elfXX.allow_wx to decide whether to map W+X or W-only memory. Future work could expand this test to add an "allow_wx" axis to the test matrix, but I would argue that a separate test should be written, since that's orthogonal to map_at_zero. MFC after: 1 week Sponsored by: Dell EMC Isilon
* Fix write only mappings on arm64Andrew Turner2020-10-131-0/+16
| | | | | | | | | | | | When trapping on a wrote access to a buffer the kernel has mapped as write only we should only pass the VM_PROT_WRITE flag. Previously the call to vm_fault_trap as the VM_PROT_READ flag was unexpected. Reported by: manu Sponsored by: Innovate UK Notes: svn path=/head/; revision=366665
* Revert r313565 -- :mmap__bad_arguments passes again after r313655Enji Cooper2017-02-111-2/+0
| | | | | | | | PR: 216976 Sponsored by: Dell EMC Isilon Notes: svn path=/head/; revision=313657
* Expect :mmap__bad_arguments to failEnji Cooper2017-02-101-0/+2
| | | | | | | | | | | | | Some recent changes to vm related to mmap(2) have broken the prot checks that would result with an EINVAL with this case I suspect r313352 is the root-cause the issue PR: 216976 Sponsored by: Dell EMC Isilon Notes: svn path=/head/; revision=313565
* Fix -Wsign-compare warningsEnji Cooper2017-01-141-6/+4
| | | | | | | | | | The loop index (i) doesn't need to be size_t as its comparison is signed MFC after: 1 week Sponsored by: Dell EMC Isilon Notes: svn path=/head/; revision=312110
* Fix leaks and test for getpagesize() returning == -1Enji Cooper2016-04-191-21/+35
| | | | | | | | | | | | | | | | | - close file descriptors after use. - Always munmap memory regions after mmap'ing them. - Make sure getpagesize() returns a value greater than 0 and use a cached value instead of always calling getpagesize(3). CID: 1331374-1331377, 1331653-1331662 Differential Revision: https://reviews.freebsd.org/D6011 MFC after: 2 weeks Reported by: Coverity Reviewed by: cem Sponsored by: EMC / Isilon Storage Division Notes: svn path=/head/; revision=298301
* Add more mmap tests related to character devices.John Baldwin2015-09-041-8/+103
| | | | | | | | | | | | | - Add cdev-related tests for bad args. - Add two simple tests cases for mapping /dev/zero that test for MAP_ANON-like behavior. Reviewed by: alc, kib MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D3323 Notes: svn path=/head/; revision=287448
* Add various tests to ensure that invalid arguments passed to mmap()John Baldwin2015-08-061-0/+72
| | | | | | | | | | trigger failures. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D3269 Notes: svn path=/head/; revision=286370
* Convert the map_at_zero test case to ATF. In particular, this willJohn Baldwin2015-08-061-36/+23
| | | | | | | | | | facilitate adding more mmap() tests. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D3268 Notes: svn path=/head/; revision=286369
* Move tests/sys/kern/mmap_test to tests/sys/vm/mmap_testEnji Cooper2015-04-271-0/+105
As jhb noted, the actual mmap(2) implementation is under sys/vm, not sys/kern/, so the correct logical place is tests/sys/vm/, not tests/sys/kern/ X-MFC with: r282076 MFC after: 6 days Notes: svn path=/head/; revision=282104
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