From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Hengqi Chen <hengqi.chen@gmail.com>,
Huacai Chen <chenhuacai@loongson.cn>,
Sasha Levin <sashal@kernel.org>,
chenhuacai@kernel.org, yangtiezhu@loongson.cn,
loongarch@lists.linux.dev, linux-mm@kvack.org
Subject: [PATCH AUTOSEL 6.6 47/47] LoongArch: Preserve syscall nr across execve()
Date: Mon, 11 Dec 2023 08:50:48 -0500 [thread overview]
Message-ID: <20231211135147.380223-47-sashal@kernel.org> (raw)
In-Reply-To: <20231211135147.380223-1-sashal@kernel.org>
From: Hengqi Chen <hengqi.chen@gmail.com>
[ Upstream commit d6c5f06e46a836e6a70c7cfd95bb38a67d9252ec ]
Currently, we store syscall nr in pt_regs::regs[11] and syscall execve()
accidentally overrides it during its execution:
sys_execve()
-> do_execve()
-> do_execveat_common()
-> bprm_execve()
-> exec_binprm()
-> search_binary_handler()
-> load_elf_binary()
-> ELF_PLAT_INIT()
ELF_PLAT_INIT() reset regs[11] to 0, so in syscall_exit_to_user_mode()
we later get a wrong syscall nr. This breaks tools like execsnoop since
it relies on execve() tracepoints.
Skip pt_regs::regs[11] reset in ELF_PLAT_INIT() to fix the issue.
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/loongarch/include/asm/elf.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/loongarch/include/asm/elf.h b/arch/loongarch/include/asm/elf.h
index b9a4ab54285c1..9b16a3b8e7060 100644
--- a/arch/loongarch/include/asm/elf.h
+++ b/arch/loongarch/include/asm/elf.h
@@ -293,7 +293,7 @@ extern const char *__elf_platform;
#define ELF_PLAT_INIT(_r, load_addr) do { \
_r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \
_r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \
- _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \
+ _r->regs[9] = _r->regs[10] /* syscall n */ = _r->regs[12] = 0; \
_r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \
_r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \
_r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \
--
2.42.0
prev parent reply other threads:[~2023-12-11 13:57 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-11 13:50 [PATCH AUTOSEL 6.6 01/47] hwtracing: hisi_ptt: Handle the interrupt in hardirq context Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 02/47] hwtracing: hisi_ptt: Don't try to attach a task Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 03/47] ASoC: amd: yc: Add HP 255 G10 into quirk table Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 04/47] ASoC: wm8974: Correct boost mixer inputs Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 05/47] arm64: dts: rockchip: fix rk356x pcie msg interrupt name Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 06/47] ASoC: Intel: Skylake: Fix mem leak in few functions Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 07/47] ASoC: nau8822: Fix incorrect type in assignment and cast to restricted __be16 Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 08/47] ASoC: SOF: topology: Fix mem leak in sof_dai_load() Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 09/47] ASoC: Intel: Skylake: mem leak in skl register function Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 10/47] ASoC: cs43130: Fix the position of const qualifier Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 11/47] ASoC: cs43130: Fix incorrect frame delay configuration Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 12/47] ASoC: fsl_xcvr: Enable 2 * TX bit clock for spdif only case Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 13/47] ASoC: rt5650: add mutex to avoid the jack detection failure Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 14/47] ASoC: SOF: mediatek: mt8186: Add Google Steelix topology compatible Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 15/47] ASoC: fsl_xcvr: refine the requested phy clock frequency Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 16/47] ASoC: Intel: skl_hda_dsp_generic: Drop HDMI routes when HDMI is not available Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 17/47] ASoC: SOF: ipc4-topology: Add core_mask in struct snd_sof_pipeline Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 18/47] ASoC: SOF: sof-audio: Modify logic for enabling/disabling topology cores Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 19/47] nouveau/tu102: flush all pdbs on vmm flush Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 20/47] ASoC: amd: yc: Add DMI entry to support System76 Pangolin 13 Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 21/47] ASoC: hdac_hda: Conditionally register dais for HDMI and Analog Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 22/47] ASoC: SOF: ipc4-topology: Correct data structures for the SRC module Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 23/47] ASoC: SOF: ipc4-topology: Correct data structures for the GAIN module Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 24/47] pds_vdpa: fix up format-truncation complaint Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 25/47] pds_vdpa: clear config callback when status goes to 0 Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 26/47] pds_vdpa: set features order Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 27/47] net/tg3: fix race condition in tg3_reset_task() Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 28/47] ASoC: da7219: Support low DC impedance headset Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 29/47] ASoC: ops: add correct range check for limiting volume Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 30/47] nvme: introduce helper function to get ctrl state Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 31/47] nvme: ensure reset state check ordering Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 32/47] nvme-ioctl: move capable() admin check to the end Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 33/47] nvme: prevent potential spectre v1 gadget Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 34/47] nvme: fix deadlock between reset and scan Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 35/47] arm64: dts: rockchip: Fix PCI node addresses on rk3399-gru Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 36/47] mips/smp: Call rcutree_report_cpu_starting() earlier Sasha Levin
2023-12-12 1:45 ` Huacai Chen
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 37/47] r8152: add vendor/device ID pair for ASUS USB-C2500 Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 38/47] drm/amd/display: Use channel_width = 2 for vram table 3.0 Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 39/47] drm/amd/display: Add monitor patch for specific eDP Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 40/47] drm/amdgpu: Add NULL checks for function pointers Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 41/47] drm/exynos: fix a potential error pointer dereference Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 42/47] drm/exynos: fix a wrong error checking Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 43/47] ALSA: pcmtest: stop timer before buffer is released Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 44/47] hwmon: (corsair-psu) Fix probe when built-in Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 45/47] LoongArch: Apply dynamic relocations for LLD Sasha Levin
2023-12-11 13:50 ` [PATCH AUTOSEL 6.6 46/47] LoongArch: Set unwind stack type to unknown rather than set error flag Sasha Levin
2023-12-11 13:50 ` Sasha Levin [this message]
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