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| author | Andreas Gruenbacher <agruenba@redhat.com> | 2021-11-08 16:08:07 +0100 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2021-11-08 16:29:28 +0100 |
| commit | a7ac203d8fd366bb6318f856466f52484c623d05 (patch) | |
| tree | a8144a764814881e0e5efc1fe7c79c93d2b8c0a2 /fs/gfs2/glock.c | |
| parent | f3506eee81d1f700d9ee2d2f4a88fddb669ec032 (diff) | |
| download | linux-a7ac203d8fd366bb6318f856466f52484c623d05.tar.gz | |
gfs2: Fix "Introduce flag for glock holder auto-demotion"
Function demote_incompat_holders iterates over the list of glock holders
with list_for_each_entry, and it then sometimes removes the current
holder from the list. This will get the loop stuck; we must use
list_for_each_entry_safe instead.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2/glock.c')
| -rw-r--r-- | fs/gfs2/glock.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 258d8aae7c535..8dbd6fe664204 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -411,14 +411,14 @@ static void do_error(struct gfs2_glock *gl, const int ret) static void demote_incompat_holders(struct gfs2_glock *gl, struct gfs2_holder *new_gh) { - struct gfs2_holder *gh; + struct gfs2_holder *gh, *tmp; /* * Demote incompatible holders before we make ourselves eligible. * (This holder may or may not allow auto-demoting, but we don't want * to demote the new holder before it's even granted.) */ - list_for_each_entry(gh, &gl->gl_holders, gh_list) { + list_for_each_entry_safe(gh, tmp, &gl->gl_holders, gh_list) { /* * Since holders are at the front of the list, we stop when we * find the first non-holder. |