diff options
| author | Catalin Marinas | 2006-09-29 02:00:25 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2006-09-29 09:18:14 -0700 |
| commit | 254e948b2908dd50df9dca4e6ed14b6cc8524fc9 (patch) | |
| tree | 5c3e3cf8c40babc88ae772dce0c90c0c40140baa | |
| parent | bce9a234ce7d8dddbfcec28e37ea58b5d8f6003d (diff) | |
[PATCH] Fix memory leak in vc_resize/vc_allocate
Memory leaks can happen in the vc_resize() function in drivers/char/vt.c
because of the vc->vc_screenbuf variable overriding in vc_allocate(). The
kmemleak reported trace is as follows:
<__kmalloc>
<vc_resize>
<fbcon_init>
<visual_init>
<vc_allocate>
<con_open>
<tty_open>
<chrdev_open>
This patch no longer allocates a screen buffer in vc_allocate() if it was
already allocated by vc_resize().
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/char/vt.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c index b49f03375439..fb75da940b59 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -737,7 +737,8 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */ visual_init(vc, currcons, 1); if (!*vc->vc_uni_pagedir_loc) con_set_default_unimap(vc); - vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); + if (!vc->vc_kmalloced) + vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); if (!vc->vc_screenbuf) { kfree(vc); vc_cons[currcons].d = NULL; |