kernel/linux.git/lib/test_maple_tree.c, branch v6.1.18

maple_tree: fix mas_empty_area_rev() lower bound validation

2023-02-09T10:28:23+00:00

commit 7327e8111adb315423035fb5233533016dfd3f2e upstream. mas_empty_area_rev() was not correctly validating the start of a gap against the lower limit. This could lead to the range starting lower than the requested minimum. Fix the issue by better validating a gap once one is found. This commit also adds tests to the maple tree test suite for this issue and tests the mas_empty_area() function for similar bound checking. Link: https://lkml.kernel.org/r/20230111200136.1851322-1-Liam.Howlett@oracle.com Link: https://bugzilla.kernel.org/show_bug.cgi?id=216911 Fixes: 54a611b60590 ("Maple Tree: add new data structure") Signed-off-by: Liam R. Howlett Reported-by: Link: https://lore.kernel.org/linux-mm/0b9f5425-08d4-8013-aa4c-e620c3b10bb2@leemhuis.info/ Tested-by: Holger Hoffsttte Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

test_maple_tree: add test for mas_spanning_rebalance() on insufficient data

2022-12-31T12:33:11+00:00

commit c5651b31f51584bd1199b3a552c8211a8523d6e1 upstream. Add a test to the maple tree test suite for the spanning rebalance insufficient node issue does not go undetected again. Link: https://lkml.kernel.org/r/20221219161922.2708732-3-Liam.Howlett@oracle.com Fixes: 54a611b60590 ("Maple Tree: add new data structure") Signed-off-by: Liam R. Howlett Cc: Andrei Vagin Cc: Mike Rapoport Cc: Muhammad Usama Anjum Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

maple_tree: reorganize testing to restore module testing

2022-11-08T23:57:22+00:00

Along the development cycle, the testing code support for module/in-kernel compiles was removed. Restore this functionality by moving any internal API tests to the userspace side, as well as threading tests. Fix the lockdep issues and add a way to reduce memory usage so the tests can complete with KASAN + memleak detection. Make the tests work on 32 bit hosts where possible and detect 32 bit hosts in the radix test suite. [akpm@linux-foundation.org: fix module export] [akpm@linux-foundation.org: fix it some more] [liam.howlett@oracle.com: fix compile warnings on 32bit build in check_find()] Link: https://lkml.kernel.org/r/20221107203816.1260327-1-Liam.Howlett@oracle.com Link: https://lkml.kernel.org/r/20221028180415.3074673-1-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Signed-off-by: Andrew Morton

lib/test_maple_tree: add testing for maple tree

2022-09-27T02:46:14+00:00

This is a test suite that uses the radix test infrastructure. It has been split into its own commit to allow for easier review of the maple tree code. The testing includes: - Allocation of nodes - gfp flag allocation checks - Expansion & contraction of tree - preallocation checks - tree navigation by next/prev - tree navigation by iterators (mas_for_each, etc) - Number of nodes for a given number of entries - Generic tree construction tests - Addition and removal of entries in forward and reverse numerical indexes - gap searching both forward and reverse - Combining gaps by overwriting entries in different ways - splitting right-most node - splitting left-most node - overwriting multiple slots - overwriting across different levels of the tree - overwriting the middle of a tree - causing a 3-way split up to the root by overwriting the last slot and first slot of different nodes and spanning different levels - RCU stress testing of the tree with threads - Duplication of the tree by entry count - Tests which were generated by fuzzers have been added. - A large number of tests which come from recording crashing in a VM and reconstructing the tree (see check_erase2_set()) Link: https://lkml.kernel.org/r/20220906194824.2110408-8-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Tested-by: Yu Zhao Cc: Catalin Marinas Cc: David Hildenbrand Cc: David Howells Cc: Davidlohr Bueso Cc: "Matthew Wilcox (Oracle)" Cc: SeongJae Park Cc: Sven Schnelle Cc: Vlastimil Babka Cc: Will Deacon Signed-off-by: Andrew Morton