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| author |   Masami Hiramatsu <mhiramat@kernel.org> | 2016-05-29 00:15:13 +0900 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-05-30 13:15:01 -0300 |
| commit | 11870d714a1b744a0225e90b0b395346357defe9 (patch) | |
| tree | b0cabbde5a55ad879ec9505710bef357a385239c /tools/perf/util/build-id.c | |
| parent | perf tools: Add arch/*/include/generated/ to .gitignore (diff) | |
| download | linux-dev-11870d714a1b744a0225e90b0b395346357defe9.tar.xz linux-dev-11870d714a1b744a0225e90b0b395346357defe9.zip | |
perf symbols: Introduce filename__readable to check readability
Introduce filename__readable to check readability by opening the file
directly. Since the access(R_OK) just checks the readability based on
real UID/GID, it is ignored that the effective UID/GID and capabilities
for some special file (e.g. /proc/kcore).
filename__readable() directly opens given file with O_RDONLY so that the
kernel checks it by effective UID/GID and capabilities.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20160528151513.16098.97576.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/build-id.c')
0 files changed, 0 insertions, 0 deletions