diff options
| author | Jan Kara <jack@suse.cz> | 2018-09-27 13:23:32 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-09-27 10:56:15 -0700 |
| commit | f52afc93cd018fe6910133a05d44671192d1aeb0 (patch) | |
| tree | 32137752634c7f3c0f4efecfc91d64551bed047c /fs/exec.c | |
| parent | 6bf4ca7fbc85d80446ac01c0d1d77db4d91a6d84 (diff) | |
dax: Fix deadlock in dax_lock_mapping_entry()
When dax_lock_mapping_entry() has to sleep to obtain entry lock, it will
fail to unlock mapping->i_pages spinlock and thus immediately deadlock
against itself when retrying to grab the entry lock again. Fix the
problem by unlocking mapping->i_pages before retrying.
Fixes: c2a7d2a11552 ("filesystem-dax: Introduce dax_lock_mapping_entry()")
Reported-by: Barret Rhoden <brho@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/exec.c')
0 files changed, 0 insertions, 0 deletions