3.2.65-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Will Deacon <[email protected]> commit 60916a9382e88fbf5e54fd36a3e658efd7ab7bed upstream. syscall_get_nr can return -1 in the case that the task is not executing a system call. This patch fixes perf_syscall_{enter,exit} to check that the syscall number is valid before using it as an index into a bitmap. Link: http://lkml.kernel.org/r/[email protected] Cc: Jason Baron <[email protected]> Cc: Wade Farnsworth <[email protected]> Cc: Frederic Weisbecker <[email protected]> Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Steven Rostedt <[email protected]> Signed-off-by: Ben Hutchings <[email protected]> --- kernel/trace/trace_syscalls.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -519,6 +519,8 @@ static void perf_syscall_enter(void *ign int size; syscall_nr = syscall_get_nr(current, regs); + if (syscall_nr < 0) + return; if (!test_bit(syscall_nr, enabled_perf_enter_syscalls)) return; @@ -593,6 +595,8 @@ static void perf_syscall_exit(void *igno int size; syscall_nr = syscall_get_nr(current, regs); + if (syscall_nr < 0) + return; if (!test_bit(syscall_nr, enabled_perf_exit_syscalls)) return; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
