From: Cong Ding Date: Mon, 14 Jan 2013 07:26:32 +0000 (+0000) Subject: powerpc: kernel/kgdb.c: Fix memory leakage X-Git-Tag: firefly_0821_release~3680^2~1174^2~2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fefd9e6f8860249b2c284d89cb2e51fa71a9503a;p=firefly-linux-kernel-4.4.55.git powerpc: kernel/kgdb.c: Fix memory leakage the variable backup_current_thread_info isn't freed before existing the function. Signed-off-by: Cong Ding Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c index c470a40b29f5..a7bc7521c064 100644 --- a/arch/powerpc/kernel/kgdb.c +++ b/arch/powerpc/kernel/kgdb.c @@ -154,12 +154,12 @@ static int kgdb_handle_breakpoint(struct pt_regs *regs) static int kgdb_singlestep(struct pt_regs *regs) { struct thread_info *thread_info, *exception_thread_info; - struct thread_info *backup_current_thread_info = \ - (struct thread_info *)kmalloc(sizeof(struct thread_info), GFP_KERNEL); + struct thread_info *backup_current_thread_info; if (user_mode(regs)) return 0; + backup_current_thread_info = (struct thread_info *)kmalloc(sizeof(struct thread_info), GFP_KERNEL); /* * On Book E and perhaps other processors, singlestep is handled on * the critical exception stack. This causes current_thread_info() @@ -185,6 +185,7 @@ static int kgdb_singlestep(struct pt_regs *regs) /* Restore current_thread_info lastly. */ memcpy(exception_thread_info, backup_current_thread_info, sizeof *thread_info); + kfree(backup_current_thread_info); return 1; }