From: Sasha Levin <sashal@kernel.org> To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>, Qian Cai <cai@lca.pw>, Michael Ellerman <mpe@ellerman.id.au>, Sasha Levin <sashal@kernel.org>, linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.2 53/70] powerpc/imc: Dont create debugfs files for cpu-less nodes Date: Tue, 24 Sep 2019 12:45:32 -0400 [thread overview] Message-ID: <20190924164549.27058-53-sashal@kernel.org> (raw) In-Reply-To: <20190924164549.27058-1-sashal@kernel.org> From: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> [ Upstream commit 41ba17f20ea835c489e77bd54e2da73184e22060 ] Commit <684d984038aa> ('powerpc/powernv: Add debugfs interface for imc-mode and imc') added debugfs interface for the nest imc pmu devices to support changing of different ucode modes. Primarily adding this capability for debug. But when doing so, the code did not consider the case of cpu-less nodes. So when reading the _cmd_ or _mode_ file of a cpu-less node will create this crash. Faulting instruction address: 0xc0000000000d0d58 Oops: Kernel access of bad area, sig: 11 [#1] ... CPU: 67 PID: 5301 Comm: cat Not tainted 5.2.0-rc6-next-20190627+ #19 NIP: c0000000000d0d58 LR: c00000000049aa18 CTR:c0000000000d0d50 REGS: c00020194548f9e0 TRAP: 0300 Not tainted (5.2.0-rc6-next-20190627+) MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR:28022822 XER: 00000000 CFAR: c00000000049aa14 DAR: 000000000003fc08 DSISR:40000000 IRQMASK: 0 ... NIP imc_mem_get+0x8/0x20 LR simple_attr_read+0x118/0x170 Call Trace: simple_attr_read+0x70/0x170 (unreliable) debugfs_attr_read+0x6c/0xb0 __vfs_read+0x3c/0x70 vfs_read+0xbc/0x1a0 ksys_read+0x7c/0x140 system_call+0x5c/0x70 Patch fixes the issue with a more robust check for vbase to NULL. Before patch, ls output for the debugfs imc directory # ls /sys/kernel/debug/powerpc/imc/ imc_cmd_0 imc_cmd_251 imc_cmd_253 imc_cmd_255 imc_mode_0 imc_mode_251 imc_mode_253 imc_mode_255 imc_cmd_250 imc_cmd_252 imc_cmd_254 imc_cmd_8 imc_mode_250 imc_mode_252 imc_mode_254 imc_mode_8 After patch, ls output for the debugfs imc directory # ls /sys/kernel/debug/powerpc/imc/ imc_cmd_0 imc_cmd_8 imc_mode_0 imc_mode_8 Actual bug here is that, we have two loops with potentially different loop counts. That is, in imc_get_mem_addr_nest(), loop count is obtained from the dt entries. But in case of export_imc_mode_and_cmd(), loop was based on for_each_nid() count. Patch fixes the loop count in latter based on the struct mem_info. Ideally it would be better to have array size in struct imc_pmu. Fixes: 684d984038aa ('powerpc/powernv: Add debugfs interface for imc-mode and imc') Reported-by: Qian Cai <cai@lca.pw> Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190827101635.6942-1-maddy@linux.vnet.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/powerpc/platforms/powernv/opal-imc.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c index 186109bdd41be..e04b20625cb94 100644 --- a/arch/powerpc/platforms/powernv/opal-imc.c +++ b/arch/powerpc/platforms/powernv/opal-imc.c @@ -53,9 +53,9 @@ static void export_imc_mode_and_cmd(struct device_node *node, struct imc_pmu *pmu_ptr) { static u64 loc, *imc_mode_addr, *imc_cmd_addr; - int chip = 0, nid; char mode[16], cmd[16]; u32 cb_offset; + struct imc_mem_info *ptr = pmu_ptr->mem_info; imc_debugfs_parent = debugfs_create_dir("imc", powerpc_debugfs_root); @@ -69,20 +69,20 @@ static void export_imc_mode_and_cmd(struct device_node *node, if (of_property_read_u32(node, "cb_offset", &cb_offset)) cb_offset = IMC_CNTL_BLK_OFFSET; - for_each_node(nid) { - loc = (u64)(pmu_ptr->mem_info[chip].vbase) + cb_offset; + while (ptr->vbase != NULL) { + loc = (u64)(ptr->vbase) + cb_offset; imc_mode_addr = (u64 *)(loc + IMC_CNTL_BLK_MODE_OFFSET); - sprintf(mode, "imc_mode_%d", nid); + sprintf(mode, "imc_mode_%d", (u32)(ptr->id)); if (!imc_debugfs_create_x64(mode, 0600, imc_debugfs_parent, imc_mode_addr)) goto err; imc_cmd_addr = (u64 *)(loc + IMC_CNTL_BLK_CMD_OFFSET); - sprintf(cmd, "imc_cmd_%d", nid); + sprintf(cmd, "imc_cmd_%d", (u32)(ptr->id)); if (!imc_debugfs_create_x64(cmd, 0600, imc_debugfs_parent, imc_cmd_addr)) goto err; - chip++; + ptr++; } return; -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sashal@kernel.org> To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sasha Levin <sashal@kernel.org>, Madhavan Srinivasan <maddy@linux.vnet.ibm.com>, Qian Cai <cai@lca.pw>, linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.2 53/70] powerpc/imc: Dont create debugfs files for cpu-less nodes Date: Tue, 24 Sep 2019 12:45:32 -0400 [thread overview] Message-ID: <20190924164549.27058-53-sashal@kernel.org> (raw) In-Reply-To: <20190924164549.27058-1-sashal@kernel.org> From: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> [ Upstream commit 41ba17f20ea835c489e77bd54e2da73184e22060 ] Commit <684d984038aa> ('powerpc/powernv: Add debugfs interface for imc-mode and imc') added debugfs interface for the nest imc pmu devices to support changing of different ucode modes. Primarily adding this capability for debug. But when doing so, the code did not consider the case of cpu-less nodes. So when reading the _cmd_ or _mode_ file of a cpu-less node will create this crash. Faulting instruction address: 0xc0000000000d0d58 Oops: Kernel access of bad area, sig: 11 [#1] ... CPU: 67 PID: 5301 Comm: cat Not tainted 5.2.0-rc6-next-20190627+ #19 NIP: c0000000000d0d58 LR: c00000000049aa18 CTR:c0000000000d0d50 REGS: c00020194548f9e0 TRAP: 0300 Not tainted (5.2.0-rc6-next-20190627+) MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR:28022822 XER: 00000000 CFAR: c00000000049aa14 DAR: 000000000003fc08 DSISR:40000000 IRQMASK: 0 ... NIP imc_mem_get+0x8/0x20 LR simple_attr_read+0x118/0x170 Call Trace: simple_attr_read+0x70/0x170 (unreliable) debugfs_attr_read+0x6c/0xb0 __vfs_read+0x3c/0x70 vfs_read+0xbc/0x1a0 ksys_read+0x7c/0x140 system_call+0x5c/0x70 Patch fixes the issue with a more robust check for vbase to NULL. Before patch, ls output for the debugfs imc directory # ls /sys/kernel/debug/powerpc/imc/ imc_cmd_0 imc_cmd_251 imc_cmd_253 imc_cmd_255 imc_mode_0 imc_mode_251 imc_mode_253 imc_mode_255 imc_cmd_250 imc_cmd_252 imc_cmd_254 imc_cmd_8 imc_mode_250 imc_mode_252 imc_mode_254 imc_mode_8 After patch, ls output for the debugfs imc directory # ls /sys/kernel/debug/powerpc/imc/ imc_cmd_0 imc_cmd_8 imc_mode_0 imc_mode_8 Actual bug here is that, we have two loops with potentially different loop counts. That is, in imc_get_mem_addr_nest(), loop count is obtained from the dt entries. But in case of export_imc_mode_and_cmd(), loop was based on for_each_nid() count. Patch fixes the loop count in latter based on the struct mem_info. Ideally it would be better to have array size in struct imc_pmu. Fixes: 684d984038aa ('powerpc/powernv: Add debugfs interface for imc-mode and imc') Reported-by: Qian Cai <cai@lca.pw> Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190827101635.6942-1-maddy@linux.vnet.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/powerpc/platforms/powernv/opal-imc.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c index 186109bdd41be..e04b20625cb94 100644 --- a/arch/powerpc/platforms/powernv/opal-imc.c +++ b/arch/powerpc/platforms/powernv/opal-imc.c @@ -53,9 +53,9 @@ static void export_imc_mode_and_cmd(struct device_node *node, struct imc_pmu *pmu_ptr) { static u64 loc, *imc_mode_addr, *imc_cmd_addr; - int chip = 0, nid; char mode[16], cmd[16]; u32 cb_offset; + struct imc_mem_info *ptr = pmu_ptr->mem_info; imc_debugfs_parent = debugfs_create_dir("imc", powerpc_debugfs_root); @@ -69,20 +69,20 @@ static void export_imc_mode_and_cmd(struct device_node *node, if (of_property_read_u32(node, "cb_offset", &cb_offset)) cb_offset = IMC_CNTL_BLK_OFFSET; - for_each_node(nid) { - loc = (u64)(pmu_ptr->mem_info[chip].vbase) + cb_offset; + while (ptr->vbase != NULL) { + loc = (u64)(ptr->vbase) + cb_offset; imc_mode_addr = (u64 *)(loc + IMC_CNTL_BLK_MODE_OFFSET); - sprintf(mode, "imc_mode_%d", nid); + sprintf(mode, "imc_mode_%d", (u32)(ptr->id)); if (!imc_debugfs_create_x64(mode, 0600, imc_debugfs_parent, imc_mode_addr)) goto err; imc_cmd_addr = (u64 *)(loc + IMC_CNTL_BLK_CMD_OFFSET); - sprintf(cmd, "imc_cmd_%d", nid); + sprintf(cmd, "imc_cmd_%d", (u32)(ptr->id)); if (!imc_debugfs_create_x64(cmd, 0600, imc_debugfs_parent, imc_cmd_addr)) goto err; - chip++; + ptr++; } return; -- 2.20.1
next prev parent reply other threads:[~2019-09-24 16:58 UTC|newest] Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-09-24 16:44 [PATCH AUTOSEL 5.2 01/70] drm/vkms: Fix crc worker races Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 02/70] drm/bridge: tc358767: Increase AUX transfer length limit Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 03/70] drm/bridge: adv7511: Attach to DSI host at probe time Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 04/70] drm/kms: Catch mode_object lifetime errors Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 05/70] drm/vkms: Avoid assigning 0 for possible_crtc Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 06/70] drm/panel: simple: fix AUO g185han01 horizontal blanking Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 07/70] drm/amd/display: add monitor patch to add T7 delay Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 08/70] video: ssd1307fb: Start page range at page_offset Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 09/70] drm/tinydrm/Kconfig: drivers: Select BACKLIGHT_CLASS_DEVICE Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 10/70] drm/stm: attach gem fence to atomic state Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 11/70] drm/panel: check failure cases in the probe func Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 12/70] drm/rockchip: Check for fast link training before enabling psr Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 13/70] drm/amdgpu: Fix hard hang for S/G display BOs Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 14/70] drm/radeon: Fix EEH during kexec Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 15/70] gpu: drm: radeon: Fix a possible null-pointer dereference in radeon_connector_set_property() Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 16/70] clk: imx8mq: Mark AHB clock as critical Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 17/70] PCI: rpaphp: Avoid a sometimes-uninitialized warning Sasha Levin 2019-09-24 16:44 ` Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 18/70] pinctrl: stmfx: update pinconf settings Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 19/70] ipmi_si: Only schedule continuously in the thread in maintenance mode Sasha Levin 2019-09-24 16:44 ` [PATCH AUTOSEL 5.2 20/70] clk: qoriq: Fix -Wunused-const-variable Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 21/70] clk: sunxi-ng: v3s: add missing clock slices for MMC2 module clocks Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 22/70] drm/amd/display: fix issue where 252-255 values are clipped Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 23/70] drm/amd/display: Fix frames_to_insert math Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 24/70] drm/amd/display: reprogram VM config when system resume Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 25/70] powerpc/powernv/ioda2: Allocate TCE table levels on demand for default DMA window Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 26/70] drm/amd/powerplay/smu7: enforce minimal VBITimeout (v2) Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 27/70] clk: actions: Don't reference clk_init_data after registration Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 28/70] clk: sirf: " Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 29/70] clk: meson: axg-audio: " Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 30/70] clk: sprd: " Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 31/70] clk: zx296718: " Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 32/70] powerpc/xmon: Check for HV mode when dumping XIVE info from OPAL Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 33/70] powerpc/rtas: use device model APIs and serialization during LPM Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 34/70] powerpc/futex: Fix warning: 'oldval' may be used uninitialized in this function Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 35/70] powerpc/64s/radix: Remove redundant pfn_pte bitop, add VM_BUG_ON Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 36/70] powerpc/64s/radix: Fix memory hotplug section page table creation Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 37/70] powerpc/pseries/mobility: use cond_resched when updating device tree Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 38/70] powerpc/perf: fix imc allocation failure handling Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 39/70] pinctrl: tegra: Fix write barrier placement in pmx_writel Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 40/70] powerpc/eeh: Clear stale EEH_DEV_NO_HANDLER flag Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 41/70] vfio_pci: Restore original state on release Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 42/70] drm/nouveau/kms/tu102-: disable input lut when input is already FP16 Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 43/70] drm/nouveau/volt: Fix for some cards having 0 maximum voltage Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 44/70] pinctrl: amd: disable spurious-firing GPIO IRQs Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 45/70] clk: renesas: mstp: Set GENPD_FLAG_ALWAYS_ON for clock domain Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 46/70] clk: renesas: cpg-mssr: " Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 47/70] drm/amd/display: support spdif Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 48/70] selftests/powerpc: Retry on host facility unavailable Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 49/70] drm/amdgpu/si: fix ASIC tests Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 50/70] powerpc/64s/exception: machine check use correct cfar for late handler Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 51/70] pstore: fs superblock limits Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 52/70] powerpc/eeh: Clean up EEH PEs after recovery finishes Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` Sasha Levin [this message] 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 53/70] powerpc/imc: Dont create debugfs files for cpu-less nodes Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 54/70] clk: qcom: gcc-sdm845: Use floor ops for sdcc clks Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 55/70] powerpc/pseries: correctly track irq state in default idle Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 56/70] pinctrl: meson-gxbb: Fix wrong pinning definition for uart_c Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 57/70] mailbox: mediatek: cmdq: clear the event in cmdq initial flow Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 58/70] arm64: fix unreachable code issue with cmpxchg Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 59/70] clk: at91: select parent if main oscillator or bypass is enabled Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 60/70] clk: imx: pll14xx: avoid glitch when set rate Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 61/70] clk: imx: clk-pll14xx: unbypass PLL by default Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 62/70] clk: Make clk_bulk_get_all() return a valid "id" Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 63/70] powerpc: dump kernel log before carrying out fadump or kdump Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 64/70] mbox: qcom: add APCS child device for QCS404 Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 65/70] clk: sprd: add missing kfree Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 66/70] scsi: core: Reduce memory required for SCSI logging Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 67/70] dma-buf/sw_sync: Synchronize signal vs syncpt free Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 68/70] drm: fix module name in edid_firmware log message Sasha Levin 2019-09-24 16:45 ` Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 69/70] f2fs: fix to drop meta/node pages during umount Sasha Levin 2019-09-24 16:45 ` [f2fs-dev] " Sasha Levin 2019-09-24 16:45 ` [PATCH AUTOSEL 5.2 70/70] ext4: fix potential use after free after remounting with noblock_validity Sasha Levin
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