On Wed, Apr 01, 2020 at 03:20:00PM -0700, Matthew Wilcox wrote: >On Wed, Apr 01, 2020 at 10:10:21PM +0000, Wei Yang wrote: >> On Tue, Mar 31, 2020 at 04:59:12PM -0700, Matthew Wilcox wrote: >> >On Tue, Mar 31, 2020 at 10:04:40PM +0000, Wei Yang wrote: >> >> cc -I. -I../../include -g -Og -Wall -D_LGPL_SOURCE -fsanitize=address -fsanitize=undefined -c -o main.o main.c >> >> In file included from ./linux/../../../../include/linux/radix-tree.h:15, >> >> from ./linux/radix-tree.h:5, >> >> from main.c:10: >> >> ./linux/rcupdate.h:5:10: fatal error: urcu.h: No such file or directory >> >> 5 | #include <urcu.h> >> >> | ^~~~~~~~ >> >> compilation terminated. >> >> make: *** [<builtin>: main.o] Error 1 >> > >> >Oh, you need liburcu installed. On Debian, that's liburcu-dev ... probably >> >liburcu-devel on Red Hat style distros. >> >> The bad news is I didn't find the package on Fedora. > >Really? https://www.google.com/search?q=fedora+liburcu has the -devel >package as the second hit from https://pkgs.org/search/?q=liburcu Occasionally, I see this error message without my change on 5.6. random seed 1586068185 running tests XArray: 21151201 of 21151201 tests passed ================================================================= ==6040==ERROR: AddressSanitizer: heap-use-after-free on address 0x60c0031bce81 at pc 0x00000040b4b3 bp 0x7f95e87f9bb0 sp 0x7f95e87f9ba0 READ of size 1 at 0x60c0031bce81 thread T11 #0 0x40b4b2 in xas_find_marked ../../../lib/xarray.c:1182 #1 0x45318e in tagged_iteration_fn /root/git/linux/tools/testing/radix-tree/iteration_check.c:77 #2 0x7f95ef2464e1 in start_thread (/lib64/libpthread.so.0+0x94e1) #3 0x7f95ee8026d2 in clone (/lib64/libc.so.6+0x1016d2) 0x60c0031bce81 is located 1 bytes inside of 128-byte region [0x60c0031bce80,0x60c0031bcf00) freed by thread T1 here: #0 0x7f95ef36c91f in __interceptor_free (/lib64/libasan.so.5+0x10d91f) #1 0x43e4ba in kmem_cache_free /root/git/linux/tools/testing/radix-tree/linux.c:64 previously allocated by thread T13 here: #0 0x7f95ef36cd18 in __interceptor_malloc (/lib64/libasan.so.5+0x10dd18) #1 0x43e1af in kmem_cache_alloc /root/git/linux/tools/testing/radix-tree/linux.c:44 Thread T11 created by T0 here: #0 0x7f95ef299955 in pthread_create (/lib64/libasan.so.5+0x3a955) #1 0x454862 in iteration_test /root/git/linux/tools/testing/radix-tree/iteration_check.c:178 Thread T1 created by T0 here: #0 0x7f95ef299955 in pthread_create (/lib64/libasan.so.5+0x3a955) #1 0x7f95ef235b89 (/lib64/liburcu.so.6+0x3b89) Thread T13 created by T0 here: #0 0x7f95ef299955 in pthread_create (/lib64/libasan.so.5+0x3a955) #1 0x4548a4 in iteration_test /root/git/linux/tools/testing/radix-tree/iteration_check.c:186 SUMMARY: AddressSanitizer: heap-use-after-free ../../../lib/xarray.c:1182 in xas_find_marked Shadow bytes around the buggy address: 0x0c188062f980: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c188062f990: 00 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa 0x0c188062f9a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c188062f9b0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd 0x0c188062f9c0: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa =>0x0c188062f9d0:[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c188062f9e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c188062f9f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c188062fa00: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c188062fa10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c188062fa20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==6040==ABORTING This is not always like this. Didn't figure out the reason yet. Hope you many have some point. -- Wei Yang Help you, Help me
