diff options
| author | Oded Gabbay <ogabbay@kernel.org> | 2022-01-30 17:39:54 +0200 |
|---|---|---|
| committer | Oded Gabbay <ogabbay@kernel.org> | 2022-02-28 14:22:04 +0200 |
| commit | 57b6f02fff3e2a8c394bbde6724950d492160356 (patch) | |
| tree | 65f8380f153d27273ec8e2743ade9de76e3ecf91 | |
| parent | 2a835946ee49462fc18eb6db9b53be789acaf2e5 (diff) | |
| download | iio-57b6f02fff3e2a8c394bbde6724950d492160356.tar.gz | |
habanalabs: fix use-after-free bug
When the code iterates over the free list of physical pages nodes, it
deletes the physical page node which is used as the iterator.
Therefore, we need to use the safe version of the iteration to prevent
use-after-free.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
| -rw-r--r-- | drivers/misc/habanalabs/common/memory.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c index 4778f23d809839..348daac621eecb 100644 --- a/drivers/misc/habanalabs/common/memory.c +++ b/drivers/misc/habanalabs/common/memory.c @@ -2860,7 +2860,7 @@ int hl_vm_ctx_init(struct hl_ctx *ctx) */ void hl_vm_ctx_fini(struct hl_ctx *ctx) { - struct hl_vm_phys_pg_pack *phys_pg_list; + struct hl_vm_phys_pg_pack *phys_pg_list, *tmp_phys_node; struct hl_device *hdev = ctx->hdev; struct hl_vm_hash_node *hnode; struct hl_vm *vm = &hdev->vm; @@ -2913,7 +2913,7 @@ void hl_vm_ctx_fini(struct hl_ctx *ctx) } spin_unlock(&vm->idr_lock); - list_for_each_entry(phys_pg_list, &free_list, node) + list_for_each_entry_safe(phys_pg_list, tmp_phys_node, &free_list, node) free_phys_pg_pack(hdev, phys_pg_list); va_range_fini(hdev, ctx->va_range[HL_VA_RANGE_TYPE_DRAM]); |