<feed xmlns='http://www.w3.org/2005/Atom'>
<title>kernel/linux.git, branch v5.4.290</title>
<subtitle>Linux kernel stable tree (mirror)</subtitle>
<id>https://git.radix-linux.su/kernel/linux.git/atom?h=v5.4.290</id>
<link rel='self' href='https://git.radix-linux.su/kernel/linux.git/atom?h=v5.4.290'/>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/'/>
<updated>2025-02-01T17:18:54+00:00</updated>
<entry>
<title>Linux 5.4.290</title>
<updated>2025-02-01T17:18:54+00:00</updated>
<author>
<name>Greg Kroah-Hartman</name>
<email>gregkh@linuxfoundation.org</email>
</author>
<published>2025-02-01T17:18:54+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=856a224845f949243d6719165c88a70e4b473ec4'/>
<id>urn:sha1:856a224845f949243d6719165c88a70e4b473ec4</id>
<content type='text'>
Link: https://lore.kernel.org/r/20250130140133.662535583@linuxfoundation.org
Tested-by: Florian Fainelli &lt;florian.fainelli@broadcom.com&gt;
Tested-by: Jon Hunter &lt;jonathanh@nvidia.com&gt;
Link: https://lore.kernel.org/r/20250131112114.030356568@linuxfoundation.org
Tested-by: Jon Hunter &lt;jonathanh@nvidia.com&gt;
Tested-by: kernelci.org bot &lt;bot@kernelci.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>Partial revert of xhci: use pm_ptr() instead #ifdef for CONFIG_PM conditionals</title>
<updated>2025-02-01T17:18:54+00:00</updated>
<author>
<name>Ron Economos</name>
<email>re@w6rz.net</email>
</author>
<published>2025-01-18T12:24:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=4b7032d01ea1fd7bae1f5ce008aaf25f4857d07f'/>
<id>urn:sha1:4b7032d01ea1fd7bae1f5ce008aaf25f4857d07f</id>
<content type='text'>
commit 448fe5a1a4b538b235a43e57863c3a078bd13b01 upstream.

commit 9734fd7a2777 ("xhci: use pm_ptr() instead of #ifdef for CONFIG_PM
conditionals") did not quite work properly in the 5.15.y branch where it was
applied to fix a build error when CONFIG_PM was set as it left the following
build errors still present:

	ERROR: modpost: "xhci_suspend" [drivers/usb/host/xhci-pci.ko] undefined!
	ERROR: modpost: "xhci_resume" [drivers/usb/host/xhci-pci.ko] undefined!

Fix this up by properly placing the #ifdef CONFIG_PM in the xhci-pci.c and
hcd.h files to handle this correctly.

Link: https://lore.kernel.org/r/133dbfa0-4a37-4ae0-bb95-1a35f668ec11@w6rz.net
Signed-off-by: Ron Economos &lt;re@w6rz.net&gt;
Link: https://lore.kernel.org/r/d0919169-ee06-4bdd-b2e3-2f776db90971@roeck-us.net
Reported-by: Guenter Roeck &lt;linux@roeck-us.net&gt;
[ Trimmed the partial revert down to an even smaller bit to only be what
  is required to fix the build error - gregkh]
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>xhci: use pm_ptr() instead of #ifdef for CONFIG_PM conditionals</title>
<updated>2025-02-01T17:18:54+00:00</updated>
<author>
<name>Arnd Bergmann</name>
<email>arnd@arndb.de</email>
</author>
<published>2023-03-28T13:10:43+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=1f91ebde6e35db144b952b87cf36bab7fb5426c2'/>
<id>urn:sha1:1f91ebde6e35db144b952b87cf36bab7fb5426c2</id>
<content type='text'>
commit 130eac4170859fb368681e00d390f20f44bbf27b upstream.

A recent patch caused an unused-function warning in builds with
CONFIG_PM disabled, after the function became marked 'static':

drivers/usb/host/xhci-pci.c:91:13: error: 'xhci_msix_sync_irqs' defined but not used [-Werror=unused-function]
   91 | static void xhci_msix_sync_irqs(struct xhci_hcd *xhci)
      |             ^~~~~~~~~~~~~~~~~~~

This could be solved by adding another #ifdef, but as there is
a trend towards removing CONFIG_PM checks in favor of helper
macros, do the same conversion here and use pm_ptr() to get
either a function pointer or NULL but avoid the warning.

As the hidden functions reference some other symbols, make
sure those are visible at compile time, at the minimal cost of
a few extra bytes for 'struct usb_device'.

Fixes: 9abe15d55dcc ("xhci: Move xhci MSI sync function to to xhci-pci")
Signed-off-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
Link: https://lore.kernel.org/r/20230328131114.1296430-1-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>drm/v3d: Assign job pointer to NULL before signaling the fence</title>
<updated>2025-02-01T17:18:54+00:00</updated>
<author>
<name>Maíra Canal</name>
<email>mcanal@igalia.com</email>
</author>
<published>2025-01-23T01:24:03+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=9793206fbf5293534c3a79d78f196e2cbb48c22d'/>
<id>urn:sha1:9793206fbf5293534c3a79d78f196e2cbb48c22d</id>
<content type='text'>
commit 6e64d6b3a3c39655de56682ec83e894978d23412 upstream.

In commit e4b5ccd392b9 ("drm/v3d: Ensure job pointer is set to NULL
after job completion"), we introduced a change to assign the job pointer
to NULL after completing a job, indicating job completion.

However, this approach created a race condition between the DRM
scheduler workqueue and the IRQ execution thread. As soon as the fence is
signaled in the IRQ execution thread, a new job starts to be executed.
This results in a race condition where the IRQ execution thread sets the
job pointer to NULL simultaneously as the `run_job()` function assigns
a new job to the pointer.

This race condition can lead to a NULL pointer dereference if the IRQ
execution thread sets the job pointer to NULL after `run_job()` assigns
it to the new job. When the new job completes and the GPU emits an
interrupt, `v3d_irq()` is triggered, potentially causing a crash.

[  466.310099] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000c0
[  466.318928] Mem abort info:
[  466.321723]   ESR = 0x0000000096000005
[  466.325479]   EC = 0x25: DABT (current EL), IL = 32 bits
[  466.330807]   SET = 0, FnV = 0
[  466.333864]   EA = 0, S1PTW = 0
[  466.337010]   FSC = 0x05: level 1 translation fault
[  466.341900] Data abort info:
[  466.344783]   ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
[  466.350285]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[  466.355350]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[  466.360677] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000089772000
[  466.367140] [00000000000000c0] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
[  466.375875] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
[  466.382163] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device algif_hash algif_skcipher af_alg bnep binfmt_misc vc4 snd_soc_hdmi_codec drm_display_helper cec brcmfmac_wcc spidev rpivid_hevc(C) drm_client_lib brcmfmac hci_uart drm_dma_helper pisp_be btbcm brcmutil snd_soc_core aes_ce_blk v4l2_mem2mem bluetooth aes_ce_cipher snd_compress videobuf2_dma_contig ghash_ce cfg80211 gf128mul snd_pcm_dmaengine videobuf2_memops ecdh_generic sha2_ce ecc videobuf2_v4l2 snd_pcm v3d sha256_arm64 rfkill videodev snd_timer sha1_ce libaes gpu_sched snd videobuf2_common sha1_generic drm_shmem_helper mc rp1_pio drm_kms_helper raspberrypi_hwmon spi_bcm2835 gpio_keys i2c_brcmstb rp1 raspberrypi_gpiomem rp1_mailbox rp1_adc nvmem_rmem uio_pdrv_genirq uio i2c_dev drm ledtrig_pattern drm_panel_orientation_quirks backlight fuse dm_mod ip_tables x_tables ipv6
[  466.458429] CPU: 0 UID: 1000 PID: 2008 Comm: chromium Tainted: G         C         6.13.0-v8+ #18
[  466.467336] Tainted: [C]=CRAP
[  466.470306] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT)
[  466.476157] pstate: 404000c9 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  466.483143] pc : v3d_irq+0x118/0x2e0 [v3d]
[  466.487258] lr : __handle_irq_event_percpu+0x60/0x228
[  466.492327] sp : ffffffc080003ea0
[  466.495646] x29: ffffffc080003ea0 x28: ffffff80c0c94200 x27: 0000000000000000
[  466.502807] x26: ffffffd08dd81d7b x25: ffffff80c0c94200 x24: ffffff8003bdc200
[  466.509969] x23: 0000000000000001 x22: 00000000000000a7 x21: 0000000000000000
[  466.517130] x20: ffffff8041bb0000 x19: 0000000000000001 x18: 0000000000000000
[  466.524291] x17: ffffffafadfb0000 x16: ffffffc080000000 x15: 0000000000000000
[  466.531452] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
[  466.538613] x11: 0000000000000000 x10: 0000000000000000 x9 : ffffffd08c527eb0
[  466.545777] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
[  466.552941] x5 : ffffffd08c4100d0 x4 : ffffffafadfb0000 x3 : ffffffc080003f70
[  466.560102] x2 : ffffffc0829e8058 x1 : 0000000000000001 x0 : 0000000000000000
[  466.567263] Call trace:
[  466.569711]  v3d_irq+0x118/0x2e0 [v3d] (P)
[  466.573826]  __handle_irq_event_percpu+0x60/0x228
[  466.578546]  handle_irq_event+0x54/0xb8
[  466.582391]  handle_fasteoi_irq+0xac/0x240
[  466.586498]  generic_handle_domain_irq+0x34/0x58
[  466.591128]  gic_handle_irq+0x48/0xd8
[  466.594798]  call_on_irq_stack+0x24/0x58
[  466.598730]  do_interrupt_handler+0x88/0x98
[  466.602923]  el0_interrupt+0x44/0xc0
[  466.606508]  __el0_irq_handler_common+0x18/0x28
[  466.611050]  el0t_64_irq_handler+0x10/0x20
[  466.615156]  el0t_64_irq+0x198/0x1a0
[  466.618740] Code: 52800035 3607faf3 f9442e80 52800021 (f9406018)
[  466.624853] ---[ end trace 0000000000000000 ]---
[  466.629483] Kernel panic - not syncing: Oops: Fatal exception in interrupt
[  466.636384] SMP: stopping secondary CPUs
[  466.640320] Kernel Offset: 0x100c400000 from 0xffffffc080000000
[  466.646259] PHYS_OFFSET: 0x0
[  466.649141] CPU features: 0x100,00000170,00901250,0200720b
[  466.654644] Memory Limit: none
[  466.657706] ---[ end Kernel panic - not syncing: Oops: Fatal exception in interrupt ]---

Fix the crash by assigning the job pointer to NULL before signaling the
fence. This ensures that the job pointer is cleared before any new job
starts execution, preventing the race condition and the NULL pointer
dereference crash.

Cc: stable@vger.kernel.org
Fixes: e4b5ccd392b9 ("drm/v3d: Ensure job pointer is set to NULL after job completion")
Signed-off-by: Maíra Canal &lt;mcanal@igalia.com&gt;
Reviewed-by: Jose Maria Casanova Crespo &lt;jmcasanova@igalia.com&gt;
Reviewed-by: Iago Toral Quiroga &lt;itoral@igalia.com&gt;
Tested-by: Phil Elwell &lt;phil@raspberrypi.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20250123012403.20447-1-mcanal@igalia.com
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>Input: xpad - add support for wooting two he (arm)</title>
<updated>2025-02-01T17:18:54+00:00</updated>
<author>
<name>Jack Greiner</name>
<email>jack@emoss.org</email>
</author>
<published>2025-01-18T00:51:58+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=9e87fc214ed912ac7c967a0cb74b29c3a7a02318'/>
<id>urn:sha1:9e87fc214ed912ac7c967a0cb74b29c3a7a02318</id>
<content type='text'>
commit 222f3390c15c4452a9f7e26f5b7d9138e75d00d5 upstream.

Add Wooting Two HE (ARM) to the list of supported devices.

Signed-off-by: Jack Greiner &lt;jack@emoss.org&gt;
Signed-off-by: Pavel Rojtberg &lt;rojtberg@gmail.com&gt;
Link: https://lore.kernel.org/r/20250107192830.414709-3-rojtberg@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>Input: xpad - add unofficial Xbox 360 wireless receiver clone</title>
<updated>2025-02-01T17:18:53+00:00</updated>
<author>
<name>Nilton Perim Neto</name>
<email>niltonperimneto@gmail.com</email>
</author>
<published>2025-01-17T17:34:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=20c54dc14d3cbcc698ef1f17d38c35a0db748448'/>
<id>urn:sha1:20c54dc14d3cbcc698ef1f17d38c35a0db748448</id>
<content type='text'>
commit e4940fe6322c851659c17852b671c6e7b1aa9f56 upstream.

Although it mimics the Microsoft's VendorID, it is in fact a clone.
Taking into account that the original Microsoft Receiver is not being
manufactured anymore, this drive can solve dpad issues encontered by
those who still use the original 360 Wireless controller
but are using a receiver clone.

Signed-off-by: Nilton Perim Neto &lt;niltonperimneto@gmail.com&gt;
Signed-off-by: Pavel Rojtberg &lt;rojtberg@gmail.com&gt;
Link: https://lore.kernel.org/r/20250107192830.414709-12-rojtberg@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>Input: atkbd - map F23 key to support default copilot shortcut</title>
<updated>2025-02-01T17:18:53+00:00</updated>
<author>
<name>Mark Pearson</name>
<email>mpearson-lenovo@squebb.ca</email>
</author>
<published>2025-01-21T04:24:08+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=e9ba82343e87211982df74b2fa300584ba36fcb0'/>
<id>urn:sha1:e9ba82343e87211982df74b2fa300584ba36fcb0</id>
<content type='text'>
commit 907bc9268a5a9f823ffa751957a5c1dd59f83f42 upstream.

Microsoft defined Meta+Shift+F23 as the Copilot shortcut instead of a
dedicated keycode, and multiple vendors have their keyboards emit this
sequence in response to users pressing a dedicated "Copilot" key.
Unfortunately the default keymap table in atkbd does not map scancode
0x6e (F23) and so the key combination does not work even if userspace
is ready to handle it.

Because this behavior is common between multiple vendors and the
scancode is currently unused map 0x6e to keycode 193 (KEY_F23) so that
key sequence is generated properly.

MS documentation for the scan code:
https://learn.microsoft.com/en-us/windows/win32/inputdev/about-keyboard-input#scan-codes
Confirmed on Lenovo, HP and Dell machines by Canonical.
Tested on Lenovo T14s G6 AMD.

Signed-off-by: Mark Pearson &lt;mpearson-lenovo@squebb.ca&gt;
Link: https://lore.kernel.org/r/20250107034554.25843-1-mpearson-lenovo@squebb.ca
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>Revert "usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null"</title>
<updated>2025-02-01T17:18:53+00:00</updated>
<author>
<name>Greg Kroah-Hartman</name>
<email>gregkh@linuxfoundation.org</email>
</author>
<published>2025-01-17T08:17:12+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=76e7577bb89b327abdf72d4c0d486074a17f712a'/>
<id>urn:sha1:76e7577bb89b327abdf72d4c0d486074a17f712a</id>
<content type='text'>
commit 086fd062bc3883ae1ce4166cff5355db315ad879 upstream.

This reverts commit 13014969cbf07f18d62ceea40bd8ca8ec9d36cec.

It is reported to cause crashes on Tegra systems, so revert it for now.

Link: https://lore.kernel.org/r/1037c1ad-9230-4181-b9c3-167dbaa47644@nvidia.com
Reported-by: Jon Hunter &lt;jonathanh@nvidia.com&gt;
Cc: stable &lt;stable@kernel.org&gt;
Cc: Lianqin Hu &lt;hulianqin@vivo.com&gt;
Link: https://lore.kernel.org/r/2025011711-yippee-fever-a737@gregkh
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()</title>
<updated>2025-02-01T17:18:53+00:00</updated>
<author>
<name>Qasim Ijaz</name>
<email>qasdev00@gmail.com</email>
</author>
<published>2025-01-13T18:00:34+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=fa4c7472469d97c4707698b4c0e098f8cfc2bf22'/>
<id>urn:sha1:fa4c7472469d97c4707698b4c0e098f8cfc2bf22</id>
<content type='text'>
commit 575a5adf48b06a2980c9eeffedf699ed5534fade upstream.

This patch addresses a null-ptr-deref in qt2_process_read_urb() due to
an incorrect bounds check in the following:

       if (newport &gt; serial-&gt;num_ports) {
               dev_err(&amp;port-&gt;dev,
                       "%s - port change to invalid port: %i\n",
                       __func__, newport);
               break;
       }

The condition doesn't account for the valid range of the serial-&gt;port
buffer, which is from 0 to serial-&gt;num_ports - 1. When newport is equal
to serial-&gt;num_ports, the assignment of "port" in the
following code is out-of-bounds and NULL:

       serial_priv-&gt;current_port = newport;
       port = serial-&gt;port[serial_priv-&gt;current_port];

The fix checks if newport is greater than or equal to serial-&gt;num_ports
indicating it is out-of-bounds.

Reported-by: syzbot &lt;syzbot+506479ebf12fe435d01a@syzkaller.appspotmail.com&gt;
Closes: https://syzkaller.appspot.com/bug?extid=506479ebf12fe435d01a
Fixes: f7a33e608d9a ("USB: serial: add quatech2 usb to serial driver")
Cc: &lt;stable@vger.kernel.org&gt;      # 3.5
Signed-off-by: Qasim Ijaz &lt;qasdev00@gmail.com&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>ext4: fix slab-use-after-free in ext4_split_extent_at()</title>
<updated>2025-02-01T17:18:53+00:00</updated>
<author>
<name>Baokun Li</name>
<email>libaokun1@huawei.com</email>
</author>
<published>2024-08-22T02:35:23+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/kernel/linux.git/commit/?id=448100a29395b0c8b4c42967155849fe0fbe808f'/>
<id>urn:sha1:448100a29395b0c8b4c42967155849fe0fbe808f</id>
<content type='text'>
commit c26ab35702f8cd0cdc78f96aa5856bfb77be798f upstream.

We hit the following use-after-free:

==================================================================
BUG: KASAN: slab-use-after-free in ext4_split_extent_at+0xba8/0xcc0
Read of size 2 at addr ffff88810548ed08 by task kworker/u20:0/40
CPU: 0 PID: 40 Comm: kworker/u20:0 Not tainted 6.9.0-dirty #724
Call Trace:
 &lt;TASK&gt;
 kasan_report+0x93/0xc0
 ext4_split_extent_at+0xba8/0xcc0
 ext4_split_extent.isra.0+0x18f/0x500
 ext4_split_convert_extents+0x275/0x750
 ext4_ext_handle_unwritten_extents+0x73e/0x1580
 ext4_ext_map_blocks+0xe20/0x2dc0
 ext4_map_blocks+0x724/0x1700
 ext4_do_writepages+0x12d6/0x2a70
[...]

Allocated by task 40:
 __kmalloc_noprof+0x1ac/0x480
 ext4_find_extent+0xf3b/0x1e70
 ext4_ext_map_blocks+0x188/0x2dc0
 ext4_map_blocks+0x724/0x1700
 ext4_do_writepages+0x12d6/0x2a70
[...]

Freed by task 40:
 kfree+0xf1/0x2b0
 ext4_find_extent+0xa71/0x1e70
 ext4_ext_insert_extent+0xa22/0x3260
 ext4_split_extent_at+0x3ef/0xcc0
 ext4_split_extent.isra.0+0x18f/0x500
 ext4_split_convert_extents+0x275/0x750
 ext4_ext_handle_unwritten_extents+0x73e/0x1580
 ext4_ext_map_blocks+0xe20/0x2dc0
 ext4_map_blocks+0x724/0x1700
 ext4_do_writepages+0x12d6/0x2a70
[...]
==================================================================

The flow of issue triggering is as follows:

ext4_split_extent_at
  path = *ppath
  ext4_ext_insert_extent(ppath)
    ext4_ext_create_new_leaf(ppath)
      ext4_find_extent(orig_path)
        path = *orig_path
        read_extent_tree_block
          // return -ENOMEM or -EIO
        ext4_free_ext_path(path)
          kfree(path)
        *orig_path = NULL
  a. If err is -ENOMEM:
  ext4_ext_dirty(path + path-&gt;p_depth)
  // path use-after-free !!!
  b. If err is -EIO and we have EXT_DEBUG defined:
  ext4_ext_show_leaf(path)
    eh = path[depth].p_hdr
    // path also use-after-free !!!

So when trying to zeroout or fix the extent length, call ext4_find_extent()
to update the path.

In addition we use *ppath directly as an ext4_ext_show_leaf() input to
avoid possible use-after-free when EXT_DEBUG is defined, and to avoid
unnecessary path updates.

Fixes: dfe5080939ea ("ext4: drop EXT4_EX_NOFREE_ON_ERR from rest of extents handling code")
Cc: stable@kernel.org
Signed-off-by: Baokun Li &lt;libaokun1@huawei.com&gt;
Reviewed-by: Jan Kara &lt;jack@suse.cz&gt;
Reviewed-by: Ojaswin Mujoo &lt;ojaswin@linux.ibm.com&gt;
Tested-by: Ojaswin Mujoo &lt;ojaswin@linux.ibm.com&gt;
Link: https://patch.msgid.link/20240822023545.1994557-4-libaokun@huaweicloud.com
Signed-off-by: Theodore Ts'o &lt;tytso@mit.edu&gt;
Signed-off-by: Shaoying Xu &lt;shaoyi@amazon.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
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