<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/arch/arm, branch linux-6.8.y</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>ARM: configs: sunxi: Enable DRM_DW_HDMI</title>
<updated>2024-05-30T07:48:58+00:00</updated>
<author>
<name>Maxime Ripard</name>
<email>mripard@kernel.org</email>
</author>
<published>2024-04-03T10:56:23+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=d3758fdaf4f687de9ff0c3b74fa2c0c1bea68b3d'/>
<id>d3758fdaf4f687de9ff0c3b74fa2c0c1bea68b3d</id>
<content type='text'>
[ Upstream commit deff401b14e2d832b25b55862ad6c73378fe034e ]

Commit 4fc8cb47fcfd ("drm/display: Move HDMI helpers into display-helper
module") turned the DRM_DW_HDMI dependency of DRM_SUN8I_DW_HDMI into a
depends on which ended up disabling the driver in the defconfig. Make
sure it's still enabled.

Fixes: 4fc8cb47fcfd ("drm/display: Move HDMI helpers into display-helper module")
Reported-by: Mark Brown &lt;broonie@kernel.org&gt;
Reported-by: Alexander Stein &lt;alexander.stein@ew.tq-group.com&gt;
Signed-off-by: Maxime Ripard &lt;mripard@kernel.org&gt;
Acked-by: Jernej Skrabec &lt;jernej.skrabec@gmail.com&gt;
Link: https://lore.kernel.org/r/20240403-fix-dw-hdmi-kconfig-v1-5-afbc4a835c38@kernel.org
Signed-off-by: Jernej Skrabec &lt;jernej.skrabec@gmail.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit deff401b14e2d832b25b55862ad6c73378fe034e ]

Commit 4fc8cb47fcfd ("drm/display: Move HDMI helpers into display-helper
module") turned the DRM_DW_HDMI dependency of DRM_SUN8I_DW_HDMI into a
depends on which ended up disabling the driver in the defconfig. Make
sure it's still enabled.

Fixes: 4fc8cb47fcfd ("drm/display: Move HDMI helpers into display-helper module")
Reported-by: Mark Brown &lt;broonie@kernel.org&gt;
Reported-by: Alexander Stein &lt;alexander.stein@ew.tq-group.com&gt;
Signed-off-by: Maxime Ripard &lt;mripard@kernel.org&gt;
Acked-by: Jernej Skrabec &lt;jernej.skrabec@gmail.com&gt;
Link: https://lore.kernel.org/r/20240403-fix-dw-hdmi-kconfig-v1-5-afbc4a835c38@kernel.org
Signed-off-by: Jernej Skrabec &lt;jernej.skrabec@gmail.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: 9381/1: kasan: clear stale stack poison</title>
<updated>2024-05-17T10:14:51+00:00</updated>
<author>
<name>Boy.Wu</name>
<email>boy.wu@mediatek.com</email>
</author>
<published>2024-04-15T04:21:55+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=b26f353786d365e658cebc9a9ace88e04fc2325e'/>
<id>b26f353786d365e658cebc9a9ace88e04fc2325e</id>
<content type='text'>
[ Upstream commit c4238686f9093b98bd6245a348bcf059cdce23af ]

We found below OOB crash:

[   33.452494] ==================================================================
[   33.453513] BUG: KASAN: stack-out-of-bounds in refresh_cpu_vm_stats.constprop.0+0xcc/0x2ec
[   33.454660] Write of size 164 at addr c1d03d30 by task swapper/0/0
[   33.455515]
[   33.455767] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O       6.1.25-mainline #1
[   33.456880] Hardware name: Generic DT based system
[   33.457555]  unwind_backtrace from show_stack+0x18/0x1c
[   33.458326]  show_stack from dump_stack_lvl+0x40/0x4c
[   33.459072]  dump_stack_lvl from print_report+0x158/0x4a4
[   33.459863]  print_report from kasan_report+0x9c/0x148
[   33.460616]  kasan_report from kasan_check_range+0x94/0x1a0
[   33.461424]  kasan_check_range from memset+0x20/0x3c
[   33.462157]  memset from refresh_cpu_vm_stats.constprop.0+0xcc/0x2ec
[   33.463064]  refresh_cpu_vm_stats.constprop.0 from tick_nohz_idle_stop_tick+0x180/0x53c
[   33.464181]  tick_nohz_idle_stop_tick from do_idle+0x264/0x354
[   33.465029]  do_idle from cpu_startup_entry+0x20/0x24
[   33.465769]  cpu_startup_entry from rest_init+0xf0/0xf4
[   33.466528]  rest_init from arch_post_acpi_subsys_init+0x0/0x18
[   33.467397]
[   33.467644] The buggy address belongs to stack of task swapper/0/0
[   33.468493]  and is located at offset 112 in frame:
[   33.469172]  refresh_cpu_vm_stats.constprop.0+0x0/0x2ec
[   33.469917]
[   33.470165] This frame has 2 objects:
[   33.470696]  [32, 76) 'global_zone_diff'
[   33.470729]  [112, 276) 'global_node_diff'
[   33.471294]
[   33.472095] The buggy address belongs to the physical page:
[   33.472862] page:3cd72da8 refcount:1 mapcount:0 mapping:00000000 index:0x0 pfn:0x41d03
[   33.473944] flags: 0x1000(reserved|zone=0)
[   33.474565] raw: 00001000 ed741470 ed741470 00000000 00000000 00000000 ffffffff 00000001
[   33.475656] raw: 00000000
[   33.476050] page dumped because: kasan: bad access detected
[   33.476816]
[   33.477061] Memory state around the buggy address:
[   33.477732]  c1d03c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.478630]  c1d03c80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
[   33.479526] &gt;c1d03d00: 00 04 f2 f2 f2 f2 00 00 00 00 00 00 f1 f1 f1 f1
[   33.480415]                                                ^
[   33.481195]  c1d03d80: 00 00 00 00 00 00 00 00 00 00 04 f3 f3 f3 f3 f3
[   33.482088]  c1d03e00: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
[   33.482978] ==================================================================

We find the root cause of this OOB is that arm does not clear stale stack
poison in the case of cpuidle.

This patch refer to arch/arm64/kernel/sleep.S to resolve this issue.

From cited commit [1] that explain the problem

Functions which the compiler has instrumented for KASAN place poison on
the stack shadow upon entry and remove this poison prior to returning.

In the case of cpuidle, CPUs exit the kernel a number of levels deep in
C code.  Any instrumented functions on this critical path will leave
portions of the stack shadow poisoned.

If CPUs lose context and return to the kernel via a cold path, we
restore a prior context saved in __cpu_suspend_enter are forgotten, and
we never remove the poison they placed in the stack shadow area by
functions calls between this and the actual exit of the kernel.

Thus, (depending on stackframe layout) subsequent calls to instrumented
functions may hit this stale poison, resulting in (spurious) KASAN
splats to the console.

To avoid this, clear any stale poison from the idle thread for a CPU
prior to bringing a CPU online.

From cited commit [2]

Extend to check for CONFIG_KASAN_STACK

[1] commit 0d97e6d8024c ("arm64: kasan: clear stale stack poison")
[2] commit d56a9ef84bd0 ("kasan, arm64: unpoison stack only with CONFIG_KASAN_STACK")

Signed-off-by: Boy Wu &lt;boy.wu@mediatek.com&gt;
Reviewed-by: Mark Rutland &lt;mark.rutland@arm.com&gt;
Acked-by: Andrey Ryabinin &lt;ryabinin.a.a@gmail.com&gt;
Reviewed-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Fixes: 5615f69bc209 ("ARM: 9016/2: Initialize the mapping of KASan shadow memory")
Signed-off-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit c4238686f9093b98bd6245a348bcf059cdce23af ]

We found below OOB crash:

[   33.452494] ==================================================================
[   33.453513] BUG: KASAN: stack-out-of-bounds in refresh_cpu_vm_stats.constprop.0+0xcc/0x2ec
[   33.454660] Write of size 164 at addr c1d03d30 by task swapper/0/0
[   33.455515]
[   33.455767] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O       6.1.25-mainline #1
[   33.456880] Hardware name: Generic DT based system
[   33.457555]  unwind_backtrace from show_stack+0x18/0x1c
[   33.458326]  show_stack from dump_stack_lvl+0x40/0x4c
[   33.459072]  dump_stack_lvl from print_report+0x158/0x4a4
[   33.459863]  print_report from kasan_report+0x9c/0x148
[   33.460616]  kasan_report from kasan_check_range+0x94/0x1a0
[   33.461424]  kasan_check_range from memset+0x20/0x3c
[   33.462157]  memset from refresh_cpu_vm_stats.constprop.0+0xcc/0x2ec
[   33.463064]  refresh_cpu_vm_stats.constprop.0 from tick_nohz_idle_stop_tick+0x180/0x53c
[   33.464181]  tick_nohz_idle_stop_tick from do_idle+0x264/0x354
[   33.465029]  do_idle from cpu_startup_entry+0x20/0x24
[   33.465769]  cpu_startup_entry from rest_init+0xf0/0xf4
[   33.466528]  rest_init from arch_post_acpi_subsys_init+0x0/0x18
[   33.467397]
[   33.467644] The buggy address belongs to stack of task swapper/0/0
[   33.468493]  and is located at offset 112 in frame:
[   33.469172]  refresh_cpu_vm_stats.constprop.0+0x0/0x2ec
[   33.469917]
[   33.470165] This frame has 2 objects:
[   33.470696]  [32, 76) 'global_zone_diff'
[   33.470729]  [112, 276) 'global_node_diff'
[   33.471294]
[   33.472095] The buggy address belongs to the physical page:
[   33.472862] page:3cd72da8 refcount:1 mapcount:0 mapping:00000000 index:0x0 pfn:0x41d03
[   33.473944] flags: 0x1000(reserved|zone=0)
[   33.474565] raw: 00001000 ed741470 ed741470 00000000 00000000 00000000 ffffffff 00000001
[   33.475656] raw: 00000000
[   33.476050] page dumped because: kasan: bad access detected
[   33.476816]
[   33.477061] Memory state around the buggy address:
[   33.477732]  c1d03c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.478630]  c1d03c80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
[   33.479526] &gt;c1d03d00: 00 04 f2 f2 f2 f2 00 00 00 00 00 00 f1 f1 f1 f1
[   33.480415]                                                ^
[   33.481195]  c1d03d80: 00 00 00 00 00 00 00 00 00 00 04 f3 f3 f3 f3 f3
[   33.482088]  c1d03e00: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
[   33.482978] ==================================================================

We find the root cause of this OOB is that arm does not clear stale stack
poison in the case of cpuidle.

This patch refer to arch/arm64/kernel/sleep.S to resolve this issue.

From cited commit [1] that explain the problem

Functions which the compiler has instrumented for KASAN place poison on
the stack shadow upon entry and remove this poison prior to returning.

In the case of cpuidle, CPUs exit the kernel a number of levels deep in
C code.  Any instrumented functions on this critical path will leave
portions of the stack shadow poisoned.

If CPUs lose context and return to the kernel via a cold path, we
restore a prior context saved in __cpu_suspend_enter are forgotten, and
we never remove the poison they placed in the stack shadow area by
functions calls between this and the actual exit of the kernel.

Thus, (depending on stackframe layout) subsequent calls to instrumented
functions may hit this stale poison, resulting in (spurious) KASAN
splats to the console.

To avoid this, clear any stale poison from the idle thread for a CPU
prior to bringing a CPU online.

From cited commit [2]

Extend to check for CONFIG_KASAN_STACK

[1] commit 0d97e6d8024c ("arm64: kasan: clear stale stack poison")
[2] commit d56a9ef84bd0 ("kasan, arm64: unpoison stack only with CONFIG_KASAN_STACK")

Signed-off-by: Boy Wu &lt;boy.wu@mediatek.com&gt;
Reviewed-by: Mark Rutland &lt;mark.rutland@arm.com&gt;
Acked-by: Andrey Ryabinin &lt;ryabinin.a.a@gmail.com&gt;
Reviewed-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Fixes: 5615f69bc209 ("ARM: 9016/2: Initialize the mapping of KASan shadow memory")
Signed-off-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm32, bpf: Reimplement sign-extension mov instruction</title>
<updated>2024-05-17T10:14:28+00:00</updated>
<author>
<name>Puranjay Mohan</name>
<email>puranjay@kernel.org</email>
</author>
<published>2024-04-19T18:28:32+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=50c552ad2a0d73ee0bce9e95e3778ec3c1973c6b'/>
<id>50c552ad2a0d73ee0bce9e95e3778ec3c1973c6b</id>
<content type='text'>
[ Upstream commit c6f48506ba30c722dd9d89aa6a40eb1926277dff ]

The current implementation of the mov instruction with sign extension has the
following problems:

  1. It clobbers the source register if it is not stacked because it
     sign extends the source and then moves it to the destination.
  2. If the dst_reg is stacked, the current code doesn't write the value
     back in case of 64-bit mov.
  3. There is room for improvement by emitting fewer instructions.

The steps for fixing this and the instructions emitted by the JIT are explained
below with examples in all combinations:

Case A: offset == 32:
=====================

  Case A.1: src and dst are stacked registers:
  --------------------------------------------
    1. Load src_lo into tmp_lo
    2. Store tmp_lo into dst_lo
    3. Sign extend tmp_lo into tmp_hi
    4. Store tmp_hi to dst_hi

    Example: r3 = (s32)r3
	r3 is a stacked register

	ldr     r6, [r11, #-16]	// Load r3_lo into tmp_lo
	// str to dst_lo is not emitted because src_lo == dst_lo
	asr     r7, r6, #31	// Sign extend tmp_lo into tmp_hi
	str     r7, [r11, #-12] // Store tmp_hi into r3_hi

  Case A.2: src is stacked but dst is not:
  ----------------------------------------
    1. Load src_lo into dst_lo
    2. Sign extend dst_lo into dst_hi

    Example: r6 = (s32)r3
	r6 maps to {ARM_R5, ARM_R4} and r3 is stacked

	ldr     r4, [r11, #-16] // Load r3_lo into r6_lo
	asr     r5, r4, #31	// Sign extend r6_lo into r6_hi

  Case A.3: src is not stacked but dst is stacked:
  ------------------------------------------------
    1. Store src_lo into dst_lo
    2. Sign extend src_lo into tmp_hi
    3. Store tmp_hi to dst_hi

    Example: r3 = (s32)r6
	r3 is stacked and r6 maps to {ARM_R5, ARM_R4}

	str     r4, [r11, #-16] // Store r6_lo to r3_lo
	asr     r7, r4, #31	// Sign extend r6_lo into tmp_hi
	str     r7, [r11, #-12]	// Store tmp_hi to dest_hi

  Case A.4: Both src and dst are not stacked:
  -------------------------------------------
    1. Mov src_lo into dst_lo
    2. Sign extend src_lo into dst_hi

    Example: (bf) r6 = (s32)r6
	r6 maps to {ARM_R5, ARM_R4}

	// Mov not emitted because dst == src
	asr     r5, r4, #31 // Sign extend r6_lo into r6_hi

Case B: offset != 32:
=====================

  Case B.1: src and dst are stacked registers:
  --------------------------------------------
    1. Load src_lo into tmp_lo
    2. Sign extend tmp_lo according to offset.
    3. Store tmp_lo into dst_lo
    4. Sign extend tmp_lo into tmp_hi
    5. Store tmp_hi to dst_hi

    Example: r9 = (s8)r3
	r9 and r3 are both stacked registers

	ldr     r6, [r11, #-16] // Load r3_lo into tmp_lo
	lsl     r6, r6, #24	// Sign extend tmp_lo
	asr     r6, r6, #24	// ..
	str     r6, [r11, #-56] // Store tmp_lo to r9_lo
	asr     r7, r6, #31	// Sign extend tmp_lo to tmp_hi
	str     r7, [r11, #-52] // Store tmp_hi to r9_hi

  Case B.2: src is stacked but dst is not:
  ----------------------------------------
    1. Load src_lo into dst_lo
    2. Sign extend dst_lo according to offset.
    3. Sign extend tmp_lo into dst_hi

    Example: r6 = (s8)r3
	r6 maps to {ARM_R5, ARM_R4} and r3 is stacked

	ldr     r4, [r11, #-16] // Load r3_lo to r6_lo
	lsl     r4, r4, #24	// Sign extend r6_lo
	asr     r4, r4, #24	// ..
	asr     r5, r4, #31	// Sign extend r6_lo into r6_hi

  Case B.3: src is not stacked but dst is stacked:
  ------------------------------------------------
    1. Sign extend src_lo into tmp_lo according to offset.
    2. Store tmp_lo into dst_lo.
    3. Sign extend src_lo into tmp_hi.
    4. Store tmp_hi to dst_hi.

    Example: r3 = (s8)r1
	r3 is stacked and r1 maps to {ARM_R3, ARM_R2}

	lsl     r6, r2, #24 	// Sign extend r1_lo to tmp_lo
	asr     r6, r6, #24	// ..
	str     r6, [r11, #-16] // Store tmp_lo to r3_lo
	asr     r7, r6, #31	// Sign extend tmp_lo to tmp_hi
	str     r7, [r11, #-12] // Store tmp_hi to r3_hi

  Case B.4: Both src and dst are not stacked:
  -------------------------------------------
    1. Sign extend src_lo into dst_lo according to offset.
    2. Sign extend dst_lo into dst_hi.

    Example: r6 = (s8)r1
	r6 maps to {ARM_R5, ARM_R4} and r1 maps to {ARM_R3, ARM_R2}

	lsl     r4, r2, #24	// Sign extend r1_lo to r6_lo
	asr     r4, r4, #24	// ..
	asr     r5, r4, #31	// Sign extend r6_lo to r6_hi

Fixes: fc832653fa0d ("arm32, bpf: add support for sign-extension mov instruction")
Reported-by: syzbot+186522670e6722692d86@syzkaller.appspotmail.com
Signed-off-by: Puranjay Mohan &lt;puranjay@kernel.org&gt;
Signed-off-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Reviewed-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
Closes: https://lore.kernel.org/all/000000000000e9a8d80615163f2a@google.com
Link: https://lore.kernel.org/bpf/20240419182832.27707-1-puranjay@kernel.org
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit c6f48506ba30c722dd9d89aa6a40eb1926277dff ]

The current implementation of the mov instruction with sign extension has the
following problems:

  1. It clobbers the source register if it is not stacked because it
     sign extends the source and then moves it to the destination.
  2. If the dst_reg is stacked, the current code doesn't write the value
     back in case of 64-bit mov.
  3. There is room for improvement by emitting fewer instructions.

The steps for fixing this and the instructions emitted by the JIT are explained
below with examples in all combinations:

Case A: offset == 32:
=====================

  Case A.1: src and dst are stacked registers:
  --------------------------------------------
    1. Load src_lo into tmp_lo
    2. Store tmp_lo into dst_lo
    3. Sign extend tmp_lo into tmp_hi
    4. Store tmp_hi to dst_hi

    Example: r3 = (s32)r3
	r3 is a stacked register

	ldr     r6, [r11, #-16]	// Load r3_lo into tmp_lo
	// str to dst_lo is not emitted because src_lo == dst_lo
	asr     r7, r6, #31	// Sign extend tmp_lo into tmp_hi
	str     r7, [r11, #-12] // Store tmp_hi into r3_hi

  Case A.2: src is stacked but dst is not:
  ----------------------------------------
    1. Load src_lo into dst_lo
    2. Sign extend dst_lo into dst_hi

    Example: r6 = (s32)r3
	r6 maps to {ARM_R5, ARM_R4} and r3 is stacked

	ldr     r4, [r11, #-16] // Load r3_lo into r6_lo
	asr     r5, r4, #31	// Sign extend r6_lo into r6_hi

  Case A.3: src is not stacked but dst is stacked:
  ------------------------------------------------
    1. Store src_lo into dst_lo
    2. Sign extend src_lo into tmp_hi
    3. Store tmp_hi to dst_hi

    Example: r3 = (s32)r6
	r3 is stacked and r6 maps to {ARM_R5, ARM_R4}

	str     r4, [r11, #-16] // Store r6_lo to r3_lo
	asr     r7, r4, #31	// Sign extend r6_lo into tmp_hi
	str     r7, [r11, #-12]	// Store tmp_hi to dest_hi

  Case A.4: Both src and dst are not stacked:
  -------------------------------------------
    1. Mov src_lo into dst_lo
    2. Sign extend src_lo into dst_hi

    Example: (bf) r6 = (s32)r6
	r6 maps to {ARM_R5, ARM_R4}

	// Mov not emitted because dst == src
	asr     r5, r4, #31 // Sign extend r6_lo into r6_hi

Case B: offset != 32:
=====================

  Case B.1: src and dst are stacked registers:
  --------------------------------------------
    1. Load src_lo into tmp_lo
    2. Sign extend tmp_lo according to offset.
    3. Store tmp_lo into dst_lo
    4. Sign extend tmp_lo into tmp_hi
    5. Store tmp_hi to dst_hi

    Example: r9 = (s8)r3
	r9 and r3 are both stacked registers

	ldr     r6, [r11, #-16] // Load r3_lo into tmp_lo
	lsl     r6, r6, #24	// Sign extend tmp_lo
	asr     r6, r6, #24	// ..
	str     r6, [r11, #-56] // Store tmp_lo to r9_lo
	asr     r7, r6, #31	// Sign extend tmp_lo to tmp_hi
	str     r7, [r11, #-52] // Store tmp_hi to r9_hi

  Case B.2: src is stacked but dst is not:
  ----------------------------------------
    1. Load src_lo into dst_lo
    2. Sign extend dst_lo according to offset.
    3. Sign extend tmp_lo into dst_hi

    Example: r6 = (s8)r3
	r6 maps to {ARM_R5, ARM_R4} and r3 is stacked

	ldr     r4, [r11, #-16] // Load r3_lo to r6_lo
	lsl     r4, r4, #24	// Sign extend r6_lo
	asr     r4, r4, #24	// ..
	asr     r5, r4, #31	// Sign extend r6_lo into r6_hi

  Case B.3: src is not stacked but dst is stacked:
  ------------------------------------------------
    1. Sign extend src_lo into tmp_lo according to offset.
    2. Store tmp_lo into dst_lo.
    3. Sign extend src_lo into tmp_hi.
    4. Store tmp_hi to dst_hi.

    Example: r3 = (s8)r1
	r3 is stacked and r1 maps to {ARM_R3, ARM_R2}

	lsl     r6, r2, #24 	// Sign extend r1_lo to tmp_lo
	asr     r6, r6, #24	// ..
	str     r6, [r11, #-16] // Store tmp_lo to r3_lo
	asr     r7, r6, #31	// Sign extend tmp_lo to tmp_hi
	str     r7, [r11, #-12] // Store tmp_hi to r3_hi

  Case B.4: Both src and dst are not stacked:
  -------------------------------------------
    1. Sign extend src_lo into dst_lo according to offset.
    2. Sign extend dst_lo into dst_hi.

    Example: r6 = (s8)r1
	r6 maps to {ARM_R5, ARM_R4} and r1 maps to {ARM_R3, ARM_R2}

	lsl     r4, r2, #24	// Sign extend r1_lo to r6_lo
	asr     r4, r4, #24	// ..
	asr     r5, r4, #31	// Sign extend r6_lo to r6_hi

Fixes: fc832653fa0d ("arm32, bpf: add support for sign-extension mov instruction")
Reported-by: syzbot+186522670e6722692d86@syzkaller.appspotmail.com
Signed-off-by: Puranjay Mohan &lt;puranjay@kernel.org&gt;
Signed-off-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Reviewed-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
Closes: https://lore.kernel.org/all/000000000000e9a8d80615163f2a@google.com
Link: https://lore.kernel.org/bpf/20240419182832.27707-1-puranjay@kernel.org
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: dts: imx6ull-tarragon: fix USB over-current polarity</title>
<updated>2024-05-02T14:35:21+00:00</updated>
<author>
<name>Michael Heimpold</name>
<email>michael.heimpold@chargebyte.com</email>
</author>
<published>2024-04-16T19:06:58+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=5f9a32625f29d726e48246389adbae379425380a'/>
<id>5f9a32625f29d726e48246389adbae379425380a</id>
<content type='text'>
[ Upstream commit d7f3040a565214a30e2f07dc9b91566d316e2d36 ]

Our Tarragon platform uses a active-low signal to inform
the i.MX6ULL about the over-current detection.

Fixes: 5e4f393ccbf0 ("ARM: dts: imx6ull: Add chargebyte Tarragon support")
Signed-off-by: Michael Heimpold &lt;michael.heimpold@chargebyte.com&gt;
Signed-off-by: Stefan Wahren &lt;wahrenst@gmx.net&gt;
Signed-off-by: Shawn Guo &lt;shawnguo@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit d7f3040a565214a30e2f07dc9b91566d316e2d36 ]

Our Tarragon platform uses a active-low signal to inform
the i.MX6ULL about the over-current detection.

Fixes: 5e4f393ccbf0 ("ARM: dts: imx6ull: Add chargebyte Tarragon support")
Signed-off-by: Michael Heimpold &lt;michael.heimpold@chargebyte.com&gt;
Signed-off-by: Stefan Wahren &lt;wahrenst@gmx.net&gt;
Signed-off-by: Shawn Guo &lt;shawnguo@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: dts: microchip: at91-sama7g5ek: Replace regulator-suspend-voltage with the valid property</title>
<updated>2024-05-02T14:35:15+00:00</updated>
<author>
<name>Andrei Simion</name>
<email>andrei.simion@microchip.com</email>
</author>
<published>2024-04-04T12:38:23+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=0658adbed344689bc4226fdf2c38ee5130a15396'/>
<id>0658adbed344689bc4226fdf2c38ee5130a15396</id>
<content type='text'>
[ Upstream commit e027b71762e84ee9d4ba9ad5401b956b9e83ed2a ]

By checking the pmic node with microchip,mcp16502.yaml#
'regulator-suspend-voltage' does not match any of the
regexes 'pinctrl-[0-9]+' from schema microchip,mcp16502.yaml#
which inherits regulator.yaml#. So replace regulator-suspend-voltage
with regulator-suspend-microvolt to avoid the inconsitency.

Fixes: 85b1304b9daa ("ARM: dts: at91: sama7g5ek: set regulator voltages for standby state")
Signed-off-by: Andrei Simion &lt;andrei.simion@microchip.com&gt;
Acked-by: Nicolas Ferre &lt;nicolas.ferre@microchip.com&gt;
Link: https://lore.kernel.org/r/20240404123824.19182-2-andrei.simion@microchip.com
[claudiu.beznea: added a dot before starting the last sentence in commit
 description]
Signed-off-by: Claudiu Beznea &lt;claudiu.beznea@tuxon.dev&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit e027b71762e84ee9d4ba9ad5401b956b9e83ed2a ]

By checking the pmic node with microchip,mcp16502.yaml#
'regulator-suspend-voltage' does not match any of the
regexes 'pinctrl-[0-9]+' from schema microchip,mcp16502.yaml#
which inherits regulator.yaml#. So replace regulator-suspend-voltage
with regulator-suspend-microvolt to avoid the inconsitency.

Fixes: 85b1304b9daa ("ARM: dts: at91: sama7g5ek: set regulator voltages for standby state")
Signed-off-by: Andrei Simion &lt;andrei.simion@microchip.com&gt;
Acked-by: Nicolas Ferre &lt;nicolas.ferre@microchip.com&gt;
Link: https://lore.kernel.org/r/20240404123824.19182-2-andrei.simion@microchip.com
[claudiu.beznea: added a dot before starting the last sentence in commit
 description]
Signed-off-by: Claudiu Beznea &lt;claudiu.beznea@tuxon.dev&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: OMAP2+: fix USB regression on Nokia N8x0</title>
<updated>2024-04-17T09:23:26+00:00</updated>
<author>
<name>Aaro Koskinen</name>
<email>aaro.koskinen@iki.fi</email>
</author>
<published>2024-02-23T18:16:56+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=89c8b8cc7ad2f38c18e2828eece9f9072e6d70f6'/>
<id>89c8b8cc7ad2f38c18e2828eece9f9072e6d70f6</id>
<content type='text'>
[ Upstream commit 4421405e3634a3189b541cf1e34598e44260720d ]

GPIO chip labels are wrong for OMAP2, so the USB does not work. Fix.

Fixes: 8e0285ab95a9 ("ARM/musb: omap2: Remove global GPIO numbers from TUSB6010")
Signed-off-by: Aaro Koskinen &lt;aaro.koskinen@iki.fi&gt;
Reviewed-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Message-ID: &lt;20240223181656.1099845-1-aaro.koskinen@iki.fi&gt;
Signed-off-by: Tony Lindgren &lt;tony@atomide.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 4421405e3634a3189b541cf1e34598e44260720d ]

GPIO chip labels are wrong for OMAP2, so the USB does not work. Fix.

Fixes: 8e0285ab95a9 ("ARM/musb: omap2: Remove global GPIO numbers from TUSB6010")
Signed-off-by: Aaro Koskinen &lt;aaro.koskinen@iki.fi&gt;
Reviewed-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Message-ID: &lt;20240223181656.1099845-1-aaro.koskinen@iki.fi&gt;
Signed-off-by: Tony Lindgren &lt;tony@atomide.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: OMAP2+: fix N810 MMC gpiod table</title>
<updated>2024-04-17T09:23:25+00:00</updated>
<author>
<name>Aaro Koskinen</name>
<email>aaro.koskinen@iki.fi</email>
</author>
<published>2024-02-23T18:14:36+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=9ce46530d18b42d5906ad9d169080ee6c7d2dad3'/>
<id>9ce46530d18b42d5906ad9d169080ee6c7d2dad3</id>
<content type='text'>
[ Upstream commit 480d44d0820dd5ae043dc97c0b46dabbe53cb1cf ]

Trying to append a second table for the same dev_id doesn't seem to work.
The second table is just silently ignored. As a result eMMC GPIOs are not
present.

Fix by using separate tables for N800 and N810.

Fixes: e519f0bb64ef ("ARM/mmc: Convert old mmci-omap to GPIO descriptors")
Signed-off-by: Aaro Koskinen &lt;aaro.koskinen@iki.fi&gt;
Message-ID: &lt;20240223181439.1099750-3-aaro.koskinen@iki.fi&gt;
Reviewed-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Acked-by: Ulf Hansson &lt;ulf.hansson@linaro.org&gt;
Signed-off-by: Tony Lindgren &lt;tony@atomide.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 480d44d0820dd5ae043dc97c0b46dabbe53cb1cf ]

Trying to append a second table for the same dev_id doesn't seem to work.
The second table is just silently ignored. As a result eMMC GPIOs are not
present.

Fix by using separate tables for N800 and N810.

Fixes: e519f0bb64ef ("ARM/mmc: Convert old mmci-omap to GPIO descriptors")
Signed-off-by: Aaro Koskinen &lt;aaro.koskinen@iki.fi&gt;
Message-ID: &lt;20240223181439.1099750-3-aaro.koskinen@iki.fi&gt;
Reviewed-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Acked-by: Ulf Hansson &lt;ulf.hansson@linaro.org&gt;
Signed-off-by: Tony Lindgren &lt;tony@atomide.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: OMAP2+: fix bogus MMC GPIO labels on Nokia N8x0</title>
<updated>2024-04-17T09:23:25+00:00</updated>
<author>
<name>Aaro Koskinen</name>
<email>aaro.koskinen@iki.fi</email>
</author>
<published>2024-02-23T18:14:35+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=2607dfe24d94621ca02e8cc6e98ae4dbc88415ca'/>
<id>2607dfe24d94621ca02e8cc6e98ae4dbc88415ca</id>
<content type='text'>
[ Upstream commit 95f37eb52e18879a1b16e51b972d992b39e50a81 ]

The GPIO bank width is 32 on OMAP2, so all labels are incorrect.

Fixes: e519f0bb64ef ("ARM/mmc: Convert old mmci-omap to GPIO descriptors")
Signed-off-by: Aaro Koskinen &lt;aaro.koskinen@iki.fi&gt;
Message-ID: &lt;20240223181439.1099750-2-aaro.koskinen@iki.fi&gt;
Reviewed-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Acked-by: Ulf Hansson &lt;ulf.hansson@linaro.org&gt;
Signed-off-by: Tony Lindgren &lt;tony@atomide.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 95f37eb52e18879a1b16e51b972d992b39e50a81 ]

The GPIO bank width is 32 on OMAP2, so all labels are incorrect.

Fixes: e519f0bb64ef ("ARM/mmc: Convert old mmci-omap to GPIO descriptors")
Signed-off-by: Aaro Koskinen &lt;aaro.koskinen@iki.fi&gt;
Message-ID: &lt;20240223181439.1099750-2-aaro.koskinen@iki.fi&gt;
Reviewed-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Acked-by: Ulf Hansson &lt;ulf.hansson@linaro.org&gt;
Signed-off-by: Tony Lindgren &lt;tony@atomide.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: dts: imx7s-warp: Pass OV2680 link-frequencies</title>
<updated>2024-04-17T09:23:24+00:00</updated>
<author>
<name>Fabio Estevam</name>
<email>festevam@denx.de</email>
</author>
<published>2024-03-28T15:19:54+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=c4a18b842dcd235744d744a3a04f14489baf1c58'/>
<id>c4a18b842dcd235744d744a3a04f14489baf1c58</id>
<content type='text'>
commit 135f218255b28c5bbf71e9e32a49e5c734cabbe5 upstream.

Since commit 63b0cd30b78e ("media: ov2680: Add bus-cfg / endpoint
property verification") the ov2680 no longer probes on a imx7s-warp7:

ov2680 1-0036: error -EINVAL: supported link freq 330000000 not found
ov2680 1-0036: probe with driver ov2680 failed with error -22

Fix it by passing the required 'link-frequencies' property as
recommended by:

https://www.kernel.org/doc/html/v6.9-rc1/driver-api/media/camera-sensor.html#handling-clocks

Cc: stable@vger.kernel.org
Fixes: 63b0cd30b78e ("media: ov2680: Add bus-cfg / endpoint property verification")
Signed-off-by: Fabio Estevam &lt;festevam@denx.de&gt;
Signed-off-by: Shawn Guo &lt;shawnguo@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 135f218255b28c5bbf71e9e32a49e5c734cabbe5 upstream.

Since commit 63b0cd30b78e ("media: ov2680: Add bus-cfg / endpoint
property verification") the ov2680 no longer probes on a imx7s-warp7:

ov2680 1-0036: error -EINVAL: supported link freq 330000000 not found
ov2680 1-0036: probe with driver ov2680 failed with error -22

Fix it by passing the required 'link-frequencies' property as
recommended by:

https://www.kernel.org/doc/html/v6.9-rc1/driver-api/media/camera-sensor.html#handling-clocks

Cc: stable@vger.kernel.org
Fixes: 63b0cd30b78e ("media: ov2680: Add bus-cfg / endpoint property verification")
Signed-off-by: Fabio Estevam &lt;festevam@denx.de&gt;
Signed-off-by: Shawn Guo &lt;shawnguo@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: dts: rockchip: fix rk322x hdmi ports node</title>
<updated>2024-04-13T11:09:58+00:00</updated>
<author>
<name>Johan Jonker</name>
<email>jbx6244@gmail.com</email>
</author>
<published>2024-01-31T21:16:55+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=e5adbf66272deefdc518c933f152522ad534e58e'/>
<id>e5adbf66272deefdc518c933f152522ad534e58e</id>
<content type='text'>
[ Upstream commit 15a5ed03000cf61daf87d14628085cb1bc8ae72c ]

Fix rk322x hdmi ports node so that it matches the
rockchip,dw-hdmi.yaml binding.

Signed-off-by: Johan Jonker &lt;jbx6244@gmail.com&gt;
Link: https://lore.kernel.org/r/9b84adf0-9312-47fd-becc-cadd06941f70@gmail.com
Signed-off-by: Heiko Stuebner &lt;heiko@sntech.de&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 15a5ed03000cf61daf87d14628085cb1bc8ae72c ]

Fix rk322x hdmi ports node so that it matches the
rockchip,dw-hdmi.yaml binding.

Signed-off-by: Johan Jonker &lt;jbx6244@gmail.com&gt;
Link: https://lore.kernel.org/r/9b84adf0-9312-47fd-becc-cadd06941f70@gmail.com
Signed-off-by: Heiko Stuebner &lt;heiko@sntech.de&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
</feed>
