X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=lttng-syscalls.c;h=5501997c48fdd73f730fc59e9ac7ecd84dc6fe50;hb=74f7b56a78514d321aaf8b3fffae174999070f71;hp=00584e3eb2ed907cbe241b42756fe345ad5fc512;hpb=404e87bf6e1a448d1b6a93c2b67b801f039235f3;p=lttng-modules.git

diff --git a/lttng-syscalls.c b/lttng-syscalls.c
index 00584e3e..5501997c 100644
--- a/lttng-syscalls.c
+++ b/lttng-syscalls.c
@@ -91,6 +91,7 @@ struct mmap_arg_struct;
 #define PARAMS(args...)	args
 
 /* Handle unknown syscalls */
+#undef TRACE_SYSTEM
 #define TRACE_SYSTEM syscalls_unknown
 #include "instrumentation/syscalls/headers/syscalls_unknown.h"
 #undef TRACE_SYSTEM
@@ -374,7 +375,7 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
 
 		filter = rcu_dereference(chan->sc_filter);
 		if (filter) {
-			if (id >= NR_compat_syscalls
+			if (id < 0 || id >= NR_compat_syscalls
 				|| !test_bit(id, filter->sc_compat)) {
 				/* System call filtered out. */
 				return;
@@ -388,7 +389,7 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
 
 		filter = rcu_dereference(chan->sc_filter);
 		if (filter) {
-			if (id >= NR_syscalls
+			if (id < 0 || id >= NR_syscalls
 				|| !test_bit(id, filter->sc)) {
 				/* System call filtered out. */
 				return;
@@ -398,7 +399,7 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
 		table_len = ARRAY_SIZE(sc_table);
 		unknown_event = chan->sc_unknown;
 	}
-	if (unlikely(id >= table_len)) {
+	if (unlikely(id < 0 || id >= table_len)) {
 		syscall_entry_unknown(unknown_event, regs, id);
 		return;
 	}
@@ -502,7 +503,7 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
 }
 
 static void syscall_exit_unknown(struct lttng_event *event,
-	struct pt_regs *regs, unsigned int id, long ret)
+	struct pt_regs *regs, int id, long ret)
 {
 	unsigned long args[UNKNOWN_SYSCALL_NRARGS];
 
@@ -528,7 +529,7 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
 
 		filter = rcu_dereference(chan->sc_filter);
 		if (filter) {
-			if (id >= NR_compat_syscalls
+			if (id < 0 || id >= NR_compat_syscalls
 				|| !test_bit(id, filter->sc_compat)) {
 				/* System call filtered out. */
 				return;
@@ -542,7 +543,7 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
 
 		filter = rcu_dereference(chan->sc_filter);
 		if (filter) {
-			if (id >= NR_syscalls
+			if (id < 0 || id >= NR_syscalls
 				|| !test_bit(id, filter->sc)) {
 				/* System call filtered out. */
 				return;
@@ -552,7 +553,7 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
 		table_len = ARRAY_SIZE(sc_exit_table);
 		unknown_event = chan->sc_exit_unknown;
 	}
-	if (unlikely(id >= table_len)) {
+	if (unlikely(id < 0 || id >= table_len)) {
 		syscall_exit_unknown(unknown_event, regs, id, ret);
 		return;
 	}
@@ -1036,6 +1037,8 @@ int lttng_syscall_filter_disable(struct lttng_channel *chan,
 	WARN_ON_ONCE(!chan->sc_table);
 
 	if (!chan->sc_filter) {
+		if (!chan->syscall_all)
+			return -EEXIST;
 		filter = kzalloc(sizeof(struct lttng_syscall_filter),
 				GFP_KERNEL);
 		if (!filter)
@@ -1228,12 +1231,12 @@ long lttng_channel_syscall_mask(struct lttng_channel *channel,
 
 	for (bit = 0; bit < ARRAY_SIZE(sc_table); bit++) {
 		bt_bitfield_write_be(tmp_mask, char, bit, 1,
-			test_bit(bit, filter->sc));
+			filter ? test_bit(bit, filter->sc) : 1);
 	}
 	for (; bit < sc_tables_len; bit++) {
 		bt_bitfield_write_be(tmp_mask, char, bit, 1,
-			test_bit(bit - ARRAY_SIZE(sc_table),
-				filter->sc_compat));
+			filter ? test_bit(bit - ARRAY_SIZE(sc_table),
+				filter->sc_compat) : 1);
 	}
 	if (copy_to_user(usyscall_mask->mask, tmp_mask, bitmask_len))
 		ret = -EFAULT;