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| author | Vasily Averin <vvs@virtuozzo.com> | 2018-11-15 13:18:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-13 10:05:33 +0100 |
| commit | bf72973ce165cb6715ae1dac1252c28f3e104dda (patch) | |
| tree | 2b4e9f734e021a17967d969ae1e3ee34819849df /fs/dlm | |
| parent | 3ed774e59ce57be7cae15b9eec1a40ccfbafe57c (diff) | |
| download | linux-stable-bf72973ce165cb6715ae1dac1252c28f3e104dda.tar.gz linux-stable-bf72973ce165cb6715ae1dac1252c28f3e104dda.tar.bz2 linux-stable-bf72973ce165cb6715ae1dac1252c28f3e104dda.zip | |
dlm: memory leaks on error path in dlm_user_request()
commit d47b41aceeadc6b58abc9c7c6485bef7cfb75636 upstream.
According to comment in dlm_user_request() ua should be freed
in dlm_free_lkb() after successful attach to lkb.
However ua is attached to lkb not in set_lock_args() but later,
inside request_lock().
Fixes 597d0cae0f99 ("[DLM] dlm: user locks")
Cc: stable@kernel.org # 2.6.19
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/dlm')
| -rw-r--r-- | fs/dlm/lock.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index 1e6a3a391849..3a7f401e943c 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -5795,20 +5795,20 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, goto out; } } - - /* After ua is attached to lkb it will be freed by dlm_free_lkb(). - When DLM_IFL_USER is set, the dlm knows that this is a userspace - lock and that lkb_astparam is the dlm_user_args structure. */ - error = set_lock_args(mode, &ua->lksb, flags, namelen, timeout_cs, fake_astfn, ua, fake_bastfn, &args); - lkb->lkb_flags |= DLM_IFL_USER; - if (error) { + kfree(ua->lksb.sb_lvbptr); + ua->lksb.sb_lvbptr = NULL; + kfree(ua); __put_lkb(ls, lkb); goto out; } + /* After ua is attached to lkb it will be freed by dlm_free_lkb(). + When DLM_IFL_USER is set, the dlm knows that this is a userspace + lock and that lkb_astparam is the dlm_user_args structure. */ + lkb->lkb_flags |= DLM_IFL_USER; error = request_lock(ls, lkb, name, namelen, &args); switch (error) { |