4.20-stable review patch. If anyone has any objections, please let me know.
------------------
[ Upstream commit fde201a466c6ad5efd72cb54fdf2cefa8b6c6ad7 ]
Protect the list_add on the pblk_line_init_bb() error path in case this code is used for some other purpose in the future.
Signed-off-by: Hua Su suhua.tanke@gmail.com Reviewed-by: Javier González javier@cnexlabs.com Signed-off-by: Matias Bjørling mb@lightnvm.io Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/lightnvm/pblk-core.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c index 6944aac43b01..247112e1db94 100644 --- a/drivers/lightnvm/pblk-core.c +++ b/drivers/lightnvm/pblk-core.c @@ -1295,15 +1295,22 @@ int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line)
ret = pblk_line_alloc_bitmaps(pblk, line); if (ret) - return ret; + goto fail;
if (!pblk_line_init_bb(pblk, line, 0)) { - list_add(&line->list, &l_mg->free_list); - return -EINTR; + ret = -EINTR; + goto fail; }
pblk_rl_free_lines_dec(&pblk->rl, line, true); return 0; + +fail: + spin_lock(&l_mg->free_lock); + list_add(&line->list, &l_mg->free_list); + spin_unlock(&l_mg->free_lock); + + return ret; }
void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line)