linux.git/drivers/staging/rtl8712, branch v6.6 Linux kernel source tree staging: rtl8712: fix race condition 2023-08-04T14:20:13+00:00 Nam Cao namcaov@gmail.com 2023-07-31T11:06:20+00:00 1422b526fba994cf05fd288a152106563b875fce In probe function, request_firmware_nowait() is called to load firmware asynchronously. At completion of firmware loading, register_netdev() is called. However, a mutex needed by netdev is initialized after the call to request_firmware_nowait(). Consequently, it can happen that register_netdev() is called before the driver is ready. Move the mutex initialization into r8712_init_drv_sw(), which is called before request_firmware_nowait(). Reported-by: syzbot+b08315e8cf5a78eed03c@syzkaller.appspotmail.com Closes: https://lore.kernel.org/linux-staging/000000000000d9d4560601b8e0d7@google.com/T/#u Fixes: 8c213fa59199 ("staging: r8712u: Use asynchronous firmware loading") Cc: stable <stable@kernel.org> Signed-off-by: Nam Cao <namcaov@gmail.com> Link: https://lore.kernel.org/r/20230731110620.116562-1-namcaov@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
In probe function, request_firmware_nowait() is called to load firmware
asynchronously. At completion of firmware loading, register_netdev() is
called. However, a mutex needed by netdev is initialized after the call
to request_firmware_nowait(). Consequently, it can happen that
register_netdev() is called before the driver is ready.

Move the mutex initialization into r8712_init_drv_sw(), which is called
before request_firmware_nowait().

Reported-by: syzbot+b08315e8cf5a78eed03c@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-staging/000000000000d9d4560601b8e0d7@google.com/T/#u
Fixes: 8c213fa59199 ("staging: r8712u: Use asynchronous firmware loading")
Cc: stable <stable@kernel.org>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/20230731110620.116562-1-namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: r8712: Fix memory leak in _r8712_init_xmit_priv() 2023-07-27T07:50:57+00:00 Larry Finger Larry.Finger@lwfinger.net 2023-07-14T17:54:17+00:00 ac83631230f77dda94154ed0ebfd368fc81c70a3 In the above mentioned routine, memory is allocated in several places. If the first succeeds and a later one fails, the routine will leak memory. This patch fixes commit 2865d42c78a9 ("staging: r8712u: Add the new driver to the mainline kernel"). A potential memory leak in r8712_xmit_resource_alloc() is also addressed. Fixes: 2865d42c78a9 ("staging: r8712u: Add the new driver to the mainline kernel") Reported-by: syzbot+cf71097ffb6755df8251@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/x/log.txt?x=11ac3fa0a80000 Cc: stable@vger.kernel.org Cc: Nam Cao <namcaov@gmail.com> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Reviewed-by: Nam Cao <namcaov@gmail.com> Link: https://lore.kernel.org/r/20230714175417.18578-1-Larry.Finger@lwfinger.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
In the above mentioned routine, memory is allocated in several places.
If the first succeeds and a later one fails, the routine will leak memory.
This patch fixes commit 2865d42c78a9 ("staging: r8712u: Add the new driver
to the mainline kernel"). A potential memory leak in
r8712_xmit_resource_alloc() is also addressed.

Fixes: 2865d42c78a9 ("staging: r8712u: Add the new driver to the mainline kernel")
Reported-by: syzbot+cf71097ffb6755df8251@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/x/log.txt?x=11ac3fa0a80000
Cc: stable@vger.kernel.org
Cc: Nam Cao <namcaov@gmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Reviewed-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/20230714175417.18578-1-Larry.Finger@lwfinger.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: rtl8172: Add blank lines after declarations 2023-04-15T16:04:36+00:00 Srihari S sriharisat@gmail.com 2023-04-08T15:16:23+00:00 86d3ad9684562cd3cee30f28d5976cd92e702473 Add blank lines as reported by checkpatch.pl as below CHECK: Please use a blank line after function/struct/union/enum declarations Signed-off-by: Srihari S <sriharisat@gmail.com> Link: https://lore.kernel.org/r/1680966983-11609-1-git-send-email-sriharisat@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Add blank lines as reported by checkpatch.pl as below

CHECK: Please use a blank line after function/struct/union/enum declarations

Signed-off-by: Srihari S <sriharisat@gmail.com>
Link: https://lore.kernel.org/r/1680966983-11609-1-git-send-email-sriharisat@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: rtl8712: Fix multiple line dereference 2023-03-08T16:00:53+00:00 Shibo Li zzutcyha@163.com 2023-02-20T08:40:50+00:00 dd680522f6aefeae94107bf4106b6f2da31c5025 This patch fixes the following warning in rtl871x_mlme.c WARNING: Avoid multiple line dereference - prefer 'adapter->securitypriv.PrivacyAlgrthm' Signed-off-by: Shibo Li <zzutcyha@163.com> Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> AW-NU120 Reviewed-by: Dan Carpenter <error27@gmail.com> Link: https://lore.kernel.org/r/20230220084050.18459-1-zzutcyha@163.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
This patch fixes the following warning in rtl871x_mlme.c

WARNING: Avoid multiple line dereference - prefer 'adapter->securitypriv.PrivacyAlgrthm'

Signed-off-by: Shibo Li <zzutcyha@163.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> AW-NU120
Reviewed-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/20230220084050.18459-1-zzutcyha@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: rtl8712: Remove extra spaces 2023-03-08T16:00:02+00:00 Shibo Li zzutcyha@163.com 2023-02-20T09:04:30+00:00 d1c1ace35e1586025a56c39eb201b6d54a592a09 This patch fixes the problem of irregular indentation Signed-off-by: Shibo Li <zzutcyha@163.com> Link: https://lore.kernel.org/r/20230220090430.19589-1-zzutcyha@163.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
This patch fixes the problem of irregular indentation

Signed-off-by: Shibo Li <zzutcyha@163.com>
Link: https://lore.kernel.org/r/20230220090430.19589-1-zzutcyha@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: rtl8712: fix potential memory leak 2022-10-31T08:08:30+00:00 Nam Cao namcaov@gmail.com 2022-10-25T09:12:26+00:00 336ccc31cda111c830332d4b56def49c9c1d48e6 In r8712_init_drv_sw(), whenever any function call returns error, it is returned immediately without properly cleaning up the other successfully executed functions. This can cause memory leak. Instead of return immediately, free all the allocated buffers first. Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> Signed-off-by: Nam Cao <namcaov@gmail.com> Link: https://lore.kernel.org/r/0a3414b12031f6cdcba81a8725e91eb9567ff34f.1666688642.git.namcaov@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
In r8712_init_drv_sw(), whenever any function call returns error, it is
returned immediately without properly cleaning up the other successfully
executed functions. This can cause memory leak.

Instead of return immediately, free all the allocated buffers first.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/0a3414b12031f6cdcba81a8725e91eb9567ff34f.1666688642.git.namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: rtl8712: check for return value of _r8712_init_xmit_priv() 2022-10-31T08:08:30+00:00 Nam Cao namcaov@gmail.com 2022-10-25T09:12:25+00:00 242443430dd8ef932a56cf483080a46f2948dd65 The return value of _r8712_init_xmit_priv() is never checked and the driver always continue execution as if all is well. This will cause problems if, for example, buffers cannot be allocated and the driver continue and use those buffers. Check for return value of _r8712_init_xmit_priv() and return error (if any) during probing. Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> Signed-off-by: Nam Cao <namcaov@gmail.com> Link: https://lore.kernel.org/r/b550803561acf26af71f2377215c28b94435a644.1666688642.git.namcaov@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
The return value of _r8712_init_xmit_priv() is never checked and the driver
always continue execution as if all is well. This will cause problems
if, for example, buffers cannot be allocated and the driver continue and
use those buffers.

Check for return value of _r8712_init_xmit_priv() and return error (if any)
during probing.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/b550803561acf26af71f2377215c28b94435a644.1666688642.git.namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: rtl8712: check for alloc fail in _r8712_init_recv_priv() 2022-10-31T08:08:30+00:00 Nam Cao namcaov@gmail.com 2022-10-25T09:12:24+00:00 63b5e50571ce4d87cd6c1c4d99de74c9d86fd0d8 The function _r8712_init_recv_priv() and also r8712_init_recv_priv() just returns silently if they fail to allocate memory. Change their return type to int and add necessary checks and handling if they return -ENOMEM Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> Signed-off-by: Nam Cao <namcaov@gmail.com> Link: https://lore.kernel.org/r/506ac35a667e511db568b06b86834fd0ceeba453.1666688642.git.namcaov@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
The function _r8712_init_recv_priv() and also r8712_init_recv_priv()
just returns silently if they fail to allocate memory. Change their
return type to int and add necessary checks and handling if they return
-ENOMEM

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/506ac35a667e511db568b06b86834fd0ceeba453.1666688642.git.namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Revert "staging: r8712u: Tracking kmemleak false positives." 2022-10-31T08:08:30+00:00 Nam Cao namcaov@gmail.com 2022-10-25T09:12:23+00:00 c5a7eecdcdb6c9d3a907ee66db2b5cffc8bdb4e1 This reverts commit 5d3da4a20a271e3cf5496a50cbb8118aa019374f. This commit annotated false positive for kmemleak. The reasoning is that the buffers are freed when the driver is unloaded. However, there is actually potential memory leak when probe fails. Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> Signed-off-by: Nam Cao <namcaov@gmail.com> Link: https://lore.kernel.org/r/26ce206b2c40c7db48c146aa6105789db9dfcc1a.1666688642.git.namcaov@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
This reverts commit 5d3da4a20a271e3cf5496a50cbb8118aa019374f.

This commit annotated false positive for kmemleak. The reasoning is that
the buffers are freed when the driver is unloaded. However, there is
actually potential memory leak when probe fails.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/26ce206b2c40c7db48c146aa6105789db9dfcc1a.1666688642.git.namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: rtl8712: Remove variable xcnt 2022-10-22T07:58:35+00:00 Colin Ian King colin.i.king@gmail.com 2022-10-21T18:09:50+00:00 acd50e52a7f2e75b3109523d2f114fa46a4362c0 The variable xcnt being incremented but it is never referenced, it is redundant and can be removed. Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Link: https://lore.kernel.org/r/20221021180950.29139-1-colin.i.king@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
The variable xcnt being incremented but it is never referenced,
it is redundant and can be removed.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20221021180950.29139-1-colin.i.king@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>