diff options
| author | Michal Swiatkowski <michal.swiatkowski@linux.intel.com> | 2025-03-12 10:52:50 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2025-03-19 09:57:37 +0000 |
| commit | 3614bf90130d60f191a5fe218d04f6251c678e13 (patch) | |
| tree | 6592b550316758d0f8b209de935e21aede94fb9e /drivers/dpll/dpll_core.c | |
| parent | f3b97b7d4bf316c3991e5634c9f4847c2df35478 (diff) | |
dpll: fix xa_alloc_cyclic() error handling
In case of returning 1 from xa_alloc_cyclic() (wrapping) ERR_PTR(1) will
be returned, which will cause IS_ERR() to be false. Which can lead to
dereference not allocated pointer (pin).
Fix it by checking if err is lower than zero.
This wasn't found in real usecase, only noticed. Credit to Pierre.
Fixes: 97f265ef7f5b ("dpll: allocate pin ids in cycle")
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/dpll/dpll_core.c')
| -rw-r--r-- | drivers/dpll/dpll_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dpll/dpll_core.c b/drivers/dpll/dpll_core.c index 32019dc33cca..1877201d1aa9 100644 --- a/drivers/dpll/dpll_core.c +++ b/drivers/dpll/dpll_core.c @@ -505,7 +505,7 @@ dpll_pin_alloc(u64 clock_id, u32 pin_idx, struct module *module, xa_init_flags(&pin->parent_refs, XA_FLAGS_ALLOC); ret = xa_alloc_cyclic(&dpll_pin_xa, &pin->id, pin, xa_limit_32b, &dpll_pin_xa_id, GFP_KERNEL); - if (ret) + if (ret < 0) goto err_xa_alloc; return pin; err_xa_alloc: |