6.6-stable review patch. If anyone has any objections, please let me know.
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From: Andrey Vatoropin a.vatoropin@crpt.ru
commit 5053eab38a4c4543522d0c320c639c56a8b59908 upstream.
If allocation of cmd->t_task_cdb fails, it remains NULL but is later dereferenced in the 'err' path.
In case of error, reset NULL t_task_cdb value to point at the default fixed-size buffer.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 9e95fb805dc0 ("scsi: target: Fix NULL pointer dereference") Cc: stable@vger.kernel.org Signed-off-by: Andrey Vatoropin a.vatoropin@crpt.ru Reviewed-by: Mike Christie michael.christie@oracle.com Link: https://patch.msgid.link/20251118084014.324940-1-a.vatoropin@crpt.ru Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/target/target_core_transport.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1524,6 +1524,7 @@ target_cmd_init_cdb(struct se_cmd *cmd, if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), gfp); if (!cmd->t_task_cdb) { + cmd->t_task_cdb = &cmd->__t_task_cdb[0]; pr_err("Unable to allocate cmd->t_task_cdb" " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", scsi_command_size(cdb),