Messages in this thread Patch in this message | | | From | Cong Ding <> | Subject | [PATCH] powerpc: kernel/kgdb.c: fix memory leakage | Date | Mon, 14 Jan 2013 17:26:32 +0000 |
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the variable backup_current_thread_info isn't freed before existing the function.
Signed-off-by: Cong Ding <dinggnu@gmail.com> --- arch/powerpc/kernel/kgdb.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c index 8747447..5ca82cd 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; } -- 1.7.9.5
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