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| author | Vicențiu Ciorbaru <vicentiu@mariadb.org> | 2019-01-24 00:58:20 +0200 |
|---|---|---|
| committer | Vicențiu Ciorbaru <vicentiu@mariadb.org> | 2019-01-27 18:58:48 +0200 |
| commit | 21f9037186f8a4bfb45486b9c28dd146e9df0e00 (patch) | |
| tree | 577f12e818dbe29f62cf9f4b9caf46926af876d8 | |
| parent | ad220b96fb01dbb6acf7e51bdd8d4d6362d96ea7 (diff) | |
| download | mariadb-git-21f9037186f8a4bfb45486b9c28dd146e9df0e00.tar.gz | |
MDEV-18360 Prevent set_max_open_files from allocating too many files
If the rlimit.rlim_cur value returned by getrlimit is not the
RLIM_INFINITY magic constant, but a *very* large number, we can allocate
too many open files. Restrict set_max_open_files to only return at most
max_file_limit, as passed via its parameter.
| -rw-r--r-- | mysys/my_file.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/mysys/my_file.c b/mysys/my_file.c index 8d01285a94b..b3aef8494cb 100644 --- a/mysys/my_file.c +++ b/mysys/my_file.c @@ -52,10 +52,9 @@ static uint set_max_open_files(uint max_file_limit) DBUG_PRINT("info", ("rlim_cur: %u rlim_max: %u", (uint) rlimit.rlim_cur, (uint) rlimit.rlim_max)); - if ((ulonglong) rlimit.rlim_cur == (ulonglong) RLIM_INFINITY) - rlimit.rlim_cur = max_file_limit; - if (rlimit.rlim_cur >= max_file_limit) - DBUG_RETURN(rlimit.rlim_cur); /* purecov: inspected */ + if ((ulonglong) rlimit.rlim_cur == (ulonglong) RLIM_INFINITY || + rlimit.rlim_cur >= max_file_limit) + DBUG_RETURN(max_file_limit); rlimit.rlim_cur= rlimit.rlim_max= max_file_limit; if (setrlimit(RLIMIT_NOFILE, &rlimit)) max_file_limit= old_cur; /* Use original value */ |