From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Yongxin Liu <yongxin.liu@windriver.com>,
Ben Skeggs <bskeggs@redhat.com>, Sasha Levin <sashal@kernel.org>,
dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org
Subject: [PATCH AUTOSEL 4.14 37/37] drm/nouveau: fix memory leak in nouveau_conn_reset()
Date: Fri, 26 Jul 2019 09:43:32 -0400 [thread overview]
Message-ID: <20190726134332.12626-37-sashal@kernel.org> (raw)
In-Reply-To: <20190726134332.12626-1-sashal@kernel.org>
From: Yongxin Liu <yongxin.liu@windriver.com>
[ Upstream commit 09b90e2fe35faeace2488234e2a7728f2ea8ba26 ]
In nouveau_conn_reset(), if connector->state is true,
__drm_atomic_helper_connector_destroy_state() will be called,
but the memory pointed by asyc isn't freed. Memory leak happens
in the following function __drm_atomic_helper_connector_reset(),
where newly allocated asyc->state will be assigned to connector->state.
So using nouveau_conn_atomic_destroy_state() instead of
__drm_atomic_helper_connector_destroy_state to free the "old" asyc.
Here the is the log showing memory leak.
unreferenced object 0xffff8c5480483c80 (size 192):
comm "kworker/0:2", pid 188, jiffies 4294695279 (age 53.179s)
hex dump (first 32 bytes):
00 f0 ba 7b 54 8c ff ff 00 00 00 00 00 00 00 00 ...{T...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<000000005005c0d0>] kmem_cache_alloc_trace+0x195/0x2c0
[<00000000a122baed>] nouveau_conn_reset+0x25/0xc0 [nouveau]
[<000000004fd189a2>] nouveau_connector_create+0x3a7/0x610 [nouveau]
[<00000000c73343a8>] nv50_display_create+0x343/0x980 [nouveau]
[<000000002e2b03c3>] nouveau_display_create+0x51f/0x660 [nouveau]
[<00000000c924699b>] nouveau_drm_device_init+0x182/0x7f0 [nouveau]
[<00000000cc029436>] nouveau_drm_probe+0x20c/0x2c0 [nouveau]
[<000000007e961c3e>] local_pci_probe+0x47/0xa0
[<00000000da14d569>] work_for_cpu_fn+0x1a/0x30
[<0000000028da4805>] process_one_work+0x27c/0x660
[<000000001d415b04>] worker_thread+0x22b/0x3f0
[<0000000003b69f1f>] kthread+0x12f/0x150
[<00000000c94c29b7>] ret_from_fork+0x3a/0x50
Signed-off-by: Yongxin Liu <yongxin.liu@windriver.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/nouveau/nouveau_connector.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 2c6d19683688..4a7d50a96d36 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -251,7 +251,7 @@ nouveau_conn_reset(struct drm_connector *connector)
return;
if (connector->state)
- __drm_atomic_helper_connector_destroy_state(connector->state);
+ nouveau_conn_atomic_destroy_state(connector, connector->state);
__drm_atomic_helper_connector_reset(connector, &asyc->state);
asyc->dither.mode = DITHERING_MODE_AUTO;
asyc->dither.depth = DITHERING_DEPTH_AUTO;
--
2.20.1
prev parent reply other threads:[~2019-07-26 13:50 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-26 13:42 [PATCH AUTOSEL 4.14 01/37] ARM: riscpc: fix DMA Sasha Levin
2019-07-26 13:42 ` [PATCH AUTOSEL 4.14 02/37] ARM: dts: rockchip: Make rk3288-veyron-minnie run at hs200 Sasha Levin
2019-07-26 13:42 ` [PATCH AUTOSEL 4.14 03/37] ARM: dts: rockchip: Make rk3288-veyron-mickey's emmc work again Sasha Levin
2019-07-26 13:42 ` [PATCH AUTOSEL 4.14 04/37] ARM: dts: rockchip: Mark that the rk3288 timer might stop in suspend Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 05/37] ftrace: Enable trampoline when rec count returns back to one Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 06/37] kernel/module.c: Only return -EEXIST for modules that have finished loading Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 07/37] MIPS: lantiq: Fix bitfield masking Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 08/37] dmaengine: rcar-dmac: Reject zero-length slave DMA requests Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 09/37] clk: tegra210: fix PLLU and PLLU_OUT1 Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 10/37] fs/adfs: super: fix use-after-free bug Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 11/37] btrfs: fix minimum number of chunk errors for DUP Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 12/37] cifs: Fix a race condition with cifs_echo_request Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 13/37] ceph: fix improper use of smp_mb__before_atomic() Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 14/37] ceph: return -ERANGE if virtual xattr value didn't fit in buffer Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 15/37] ACPI: blacklist: fix clang warning for unused DMI table Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 16/37] scsi: zfcp: fix GCC compiler warning emitted with -Wmaybe-uninitialized Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 17/37] x86: kvm: avoid constant-conversion warning Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 18/37] ACPI: fix false-positive -Wuninitialized warning Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 19/37] ISDN: hfcsusb: checking idx of ep configuration Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 20/37] be2net: Signal that the device cannot transmit during reconfiguration Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 21/37] x86/apic: Silence -Wtype-limits compiler warnings Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 22/37] x86: math-emu: Hide clang warnings for 16-bit overflow Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 23/37] mm/cma.c: fail if fixed declaration can't be honored Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 24/37] coda: add error handling for fget Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 25/37] coda: fix build using bare-metal toolchain Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 26/37] uapi linux/coda_psdev.h: move upc_req definition from uapi to kernel side headers Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 27/37] drivers/rapidio/devices/rio_mport_cdev.c: NUL terminate some strings Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 28/37] drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 29/37] ipc/mqueue.c: only perform resource calculation if user valid Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 30/37] floppy: fix div-by-zero in setup_format_params Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 31/37] floppy: fix out-of-bounds read in copy_buffer Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 32/37] xen: let alloc_xenballooned_pages() fail if not enough memory free Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 33/37] xen/pv: Fix a boot up hang revealed by int3 self test Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 34/37] x86/kvm: Don't call kvm_spurious_fault() from .fixup Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 35/37] x86/paravirt: Fix callee-saved function ELF sizes Sasha Levin
2019-07-26 13:43 ` [PATCH AUTOSEL 4.14 36/37] x86, boot: Remove multiple copy of static function sanitize_boot_params() Sasha Levin
2019-07-26 13:43 ` Sasha Levin [this message]
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