From cab67860a5106b986abe7d9682d2833912373c67 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Pedro=20Pinha=CC=83o?= Date: Thu, 29 Jan 2015 23:19:53 +0100 Subject: [PATCH] Fix divide by zero crash When called with 0 symbol rate the module would crash with a divide by zero error. Added simple symbol rate validation --- .../linux-227-ds3000-invalid-symbol-rate.patch | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 packages/linux/patches/3.18.4/linux-227-ds3000-invalid-symbol-rate.patch diff --git a/packages/linux/patches/3.18.4/linux-227-ds3000-invalid-symbol-rate.patch b/packages/linux/patches/3.18.4/linux-227-ds3000-invalid-symbol-rate.patch new file mode 100644 index 0000000000..79e04f2f82 --- /dev/null +++ b/packages/linux/patches/3.18.4/linux-227-ds3000-invalid-symbol-rate.patch @@ -0,0 +1,18 @@ +diff -rupN a/drivers/media/dvb-frontends/ds3000.c b/drivers/media/dvb-frontends/ds3000.c +--- a/drivers/media/dvb-frontends/ds3000.c 2015-01-28 23:24:59.000000000 +0100 ++++ b/drivers/media/dvb-frontends/ds3000.c 2015-01-29 21:57:56.000000000 +0100 +@@ -958,6 +958,14 @@ static int ds3000_set_frontend(struct dv + /* enable ac coupling */ + ds3000_writereg(state, 0x25, 0x8a); + ++ dprintk("%s() frequency:%u symbol_rate:%u\n", __func__, c->frequency, c->symbol_rate); ++ ++ if (c->symbol_rate < ds3000_ops.info.symbol_rate_min || c->symbol_rate > ds3000_ops.info.symbol_rate_max ) { ++ dprintk("%s() symbol_rate %u out of range (%u ... %u)\n", __func__, c->symbol_rate, ++ ds3000_ops.info.symbol_rate_min, ds3000_ops.info.symbol_rate_max); ++ return 1; ++ } ++ + /* enhance symbol rate performance */ + if ((c->symbol_rate / 1000) <= 5000) { + value = 29777 / (c->symbol_rate / 1000) + 1; \ No newline at end of file