Em Mon, Mar 26, 2018 at 09:42:09AM -0400, [email protected] escreveu: > From: Kan Liang <[email protected]> > > There is segmentation fault when running perf trace. For example, > [root@jouet e]# perf trace -e *chdir -o /tmp/bla perf report > --ignore-vmlinux -i ../perf.data > > The perf_mmap__consume() could unmap the mmap. It needs to check the > refcnt in perf_mmap__read_done(). > > Fixes: ee023de05f35 ("perf mmap: Introduce perf_mmap__read_done()") > Reported-by: Arnaldo Carvalho de Melo <[email protected]> > Signed-off-by: Kan Liang <[email protected]>
Seems insuficient: [root@jouet ~]# perf trace -e *chdir -o /tmp/bla perf report --ignore-vmlinux perf: Segmentation fault Obtained 9 stack frames. perf(sighandler_dump_stack+0x3e) [0x4fe31e] /lib64/libc.so.6(+0x346df) [0x7fc0c3ced6df] perf(perf_mmap__read_init+0x26) [0x4ccd06] perf(cmd_trace+0x1bf6) [0x47bb76] perf() [0x4a824e] perf() [0x4a8550] perf(main+0x331) [0x42bef1] /lib64/libc.so.6(__libc_start_main+0xe9) [0x7fc0c3cd9f29] perf(_start+0x29) [0x42c319] Segmentation fault (core dumped) [root@jouet ~]# - Arnaldo
