From 0eb973f91521c6bcb6399d25327711d083f6eb10 Mon Sep 17 00:00:00 2001 From: "Gabriel L. Somlo" Date: Wed, 29 Apr 2015 11:21:52 -0400 Subject: [PATCH] fw_cfg: prohibit insertion of duplicate fw_cfg file names Exit with an error (instead of simply logging a trace event) whenever the same fw_cfg file name is added multiple times via one of the fw_cfg_add_file[_callback]() host-side API calls. Signed-off-by: Gabriel Somlo Reviewed-by: Laszlo Ersek Signed-off-by: Gerd Hoffmann --- hw/nvram/fw_cfg.c | 11 ++++++----- trace-events | 1 - 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c index 0c0e15ecf5..88481b78c4 100644 --- a/hw/nvram/fw_cfg.c +++ b/hw/nvram/fw_cfg.c @@ -515,18 +515,19 @@ void fw_cfg_add_file_callback(FWCfgState *s, const char *filename, index = be32_to_cpu(s->files->count); assert(index < FW_CFG_FILE_SLOTS); - fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index, - callback, callback_opaque, data, len); - pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name), filename); for (i = 0; i < index; i++) { if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) { - trace_fw_cfg_add_file_dupe(s, s->files->f[index].name); - return; + error_report("duplicate fw_cfg file name: %s", + s->files->f[index].name); + exit(1); } } + fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index, + callback, callback_opaque, data, len); + s->files->f[index].size = cpu_to_be32(len); s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index); trace_fw_cfg_add_file(s, index, s->files->f[index].name, len); diff --git a/trace-events b/trace-events index 27d4ba71b6..9a29df7bb6 100644 --- a/trace-events +++ b/trace-events @@ -195,7 +195,6 @@ ecc_diag_mem_readb(uint64_t addr, uint32_t ret) "Read diagnostic %"PRId64"= %02x # hw/nvram/fw_cfg.c fw_cfg_select(void *s, uint16_t key, int ret) "%p key %d = %d" fw_cfg_read(void *s, uint8_t ret) "%p = %d" -fw_cfg_add_file_dupe(void *s, char *name) "%p %s" fw_cfg_add_file(void *s, int index, char *name, size_t len) "%p #%d: %s (%zd bytes)" # hw/block/hd-geometry.c