Pull exit cleanups from Eric Biederman:
"While looking at some issues related to the exit path in the kernel I
found several instances where the code is not using the existing
abstractions properly.
This set of changes introduces force_fatal_sig a way of sending a
signal and not allowing it to be caught, and corrects the misuse of
the existing abstractions that I found.
A lot of the misuse of the existing abstractions are silly things such
as doing something after calling a no return function, rolling BUG by
hand, doing more work than necessary to terminate a kernel thread, or
calling do_exit(SIGKILL) instead of calling force_sig(SIGKILL).
In the review a deficiency in force_fatal_sig and force_sig_seccomp
where ptrace or sigaction could prevent the delivery of the signal was
found. I have added a change that adds SA_IMMUTABLE to change that
makes it impossible to interrupt the delivery of those signals, and
allows backporting to fix force_sig_seccomp
And Arnd found an issue where a function passed to kthread_run had the
wrong prototype, and after my cleanup was failing to build."
* 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (23 commits)
soc: ti: fix wkup_m3_rproc_boot_thread return type
signal: Add SA_IMMUTABLE to ensure forced siganls do not get changed
signal: Replace force_sigsegv(SIGSEGV) with force_fatal_sig(SIGSEGV)
exit/r8188eu: Replace the macro thread_exit with a simple return 0
exit/rtl8712: Replace the macro thread_exit with a simple return 0
exit/rtl8723bs: Replace the macro thread_exit with a simple return 0
signal/x86: In emulate_vsyscall force a signal instead of calling do_exit
signal/sparc32: In setup_rt_frame and setup_fram use force_fatal_sig
signal/sparc32: Exit with a fatal signal when try_to_clear_window_buffer fails
exit/syscall_user_dispatch: Send ordinary signals on failure
signal: Implement force_fatal_sig
exit/kthread: Have kernel threads return instead of calling do_exit
signal/s390: Use force_sigsegv in default_trap_handler
signal/vm86_32: Properly send SIGSEGV when the vm86 state cannot be saved.
signal/vm86_32: Replace open coded BUG_ON with an actual BUG_ON
signal/sparc: In setup_tsb_params convert open coded BUG into BUG
signal/powerpc: On swapcontext failure force SIGSEGV
signal/sh: Use force_sig(SIGKILL) instead of do_group_exit(SIGKILL)
signal/mips: Update (_save|_restore)_fp_context to fail with -EFAULT
signal/sparc32: Remove unreachable do_exit in do_sparc_fault
...
Here is the big set of staging driver updates and cleanups for 5.16-rc1.
Overall we ended up removing a lot of code this time, a bit over 20,000
lines are now gone thanks to a lot of cleanup work by many developers.
Nothing huge in here functionality wise, just loads of cleanups:
- r8188eu driver major cleanups and removal of unused and dead
code
- wlan-ng minor cleanups
- fbtft driver cleanups
- most driver cleanups
- rtl8* drivers cleanups
- rts5208 driver cleanups
- vt6655 driver cleanups
- vc04_services drivers cleanups
- wfx cleanups on the way to almost getting this merged out of
staging (it's close!)
- tiny mips changes needed for the mt7621 drivers, they have
been acked by the respective subsystem maintainers to go
through this tree.
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver updates from Greg KH:
"Here is the big set of staging driver updates and cleanups for
5.16-rc1.
Overall we ended up removing a lot of code this time, a bit over
20,000 lines are now gone thanks to a lot of cleanup work by many
developers.
Nothing huge in here functionality wise, just loads of cleanups:
- r8188eu driver major cleanups and removal of unused and dead code
- wlan-ng minor cleanups
- fbtft driver cleanups
- most driver cleanups
- rtl8* drivers cleanups
- rts5208 driver cleanups
- vt6655 driver cleanups
- vc04_services drivers cleanups
- wfx cleanups on the way to almost getting this merged out of
staging (it's close!)
- tiny mips changes needed for the mt7621 drivers, they have been
acked by the respective subsystem maintainers to go through this
tree.
All of these have been in linux-next for a while with no reported
issues"
* tag 'staging-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (622 commits)
staging: r8188eu: hal: remove goto statement and local variable
staging: rtl8723bs: hal remove the assignment to itself
staging: rtl8723bs: fix unmet dependency on CRYPTO for CRYPTO_LIB_ARC4
staging: vchiq_core: get rid of typedef
staging: fieldbus: anybus: reframe comment to avoid warning
staging: r8188eu: fix missing unlock in rtw_resume()
staging: r8188eu: core: remove the goto from rtw_IOL_accquire_xmit_frame
staging: r8188eu: core: remove goto statement
staging: vt6655: Rename `dwAL7230InitTable` array
staging: vt6655: Rename `dwAL2230PowerTable` array
staging: vt6655: Rename `dwAL7230InitTableAMode` array
staging: vt6655: Rename `dwAL7230ChannelTable2` array
staging: vt6655: Rename `dwAL7230ChannelTable1` array
staging: vt6655: Rename `dwAL7230ChannelTable0` array
staging: vt6655: Rename `dwAL2230ChannelTable1` array
staging: vt6655: Rename `dwAL2230ChannelTable0` array
staging: r8712u: fix control-message timeout
staging: rtl8192u: fix control-message timeouts
staging: mt7621-dts: add missing SPDX license to files
staging: vchiq_core: fix quoted strings split across lines
...
Every place thread_exit is called is at the end of a function started
with kthread_run. The code in kthread_run has arranged things so a
kernel thread can just return and do_exit will be called.
So just have the threads return instead of calling complete_and_exit.
Link: https://lkml.kernel.org/r/20211020174406.17889-18-ebiederm@xmission.com
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
The 0-element arrays that are used as memcpy() destinations are actually
flexible arrays. Adjust their structures accordingly so that memcpy()
can better reason able their destination size (i.e. they need to be seen
as "unknown" length rather than "zero").
In some cases, use of the DECLARE_FLEX_ARRAY() helper is needed when a
flexible array is alone in a struct.
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Nilesh Javali <njavali@marvell.com>
Cc: Manish Rangankar <mrangankar@marvell.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Phillip Potter <phil@philpotter.co.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Florian Schilhabel <florian.c.schilhabel@googlemail.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Fabio Aiuto <fabioaiuto83@gmail.com>
Cc: Ross Schmidt <ross.schm.dev@gmail.com>
Cc: Marco Cesati <marcocesati@gmail.com>
Cc: ath10k@lists.infradead.org
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Cc: linux-staging@lists.linux.dev
Signed-off-by: Kees Cook <keescook@chromium.org>
The header file ehternet.h defines only two constants.
#define ETHERNET_HEADER_SIZE 14 /* Ethernet Header Length */
#define LLC_HEADER_SIZE 6 /* LLC Header Length */
Both are only used in the file core/rtw_recv.c and ETHERNET_HEADER_SIZE
just duplicates the in-kernel constant ETH_HLEN. Replace the usage of
ETHERNET_HEADER_SIZE with ETH_HLEN, move the definition of LLC_HEADER_SIZE
into rtw_rev.h (renamed to LLC_HEADER_LENGTH) and remove the now unused
header file ethernet.h.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210825100842.13217-1-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fix sizes of tx power tables to the real used
values (i.e. 2 bandwidth, 3 rate sections).
Delete MAX_BASE_NUM_IN_PHY_REG_PG_2_4 macro in
this process, for it expands to a larger than
needed rate section index value.
Modify comments accordingly.
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/5f52295a8b17f68ad80ffb7b6301da83bfc11a68.1628329348.git.fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
use MAX_RF_PATH_NUM as ceiling to rf path index.
Only 2 rf paths are used, not 4. Remove also
TX_POWER_BY_RATE_NUM_RF left unused.
Use RF_PATH_A as loop starting point instead of
hardcoded 0, as in other places.
Related comments modified accordingly.
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/88da23cef57131b39a63b2757b91f959553dd65d.1628329348.git.fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
rtl8723bs support only two rf paths (A and B), remove all
the others (C, D, BC, ...) as they are unused. Keep
just one enum selecting rf path, remove unused macro
indicating max rf path number, add an item in rf_path
enum for this pourpose.
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/23060c85ab9aa468c9c021378f0dc8a8f887a578.1628329348.git.fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
BIT(x) macro used all over the driver is defined in
include/vsdo/bit.h as
- #define BIT(nr) (UL(1) << (nr))
which is safer than the local BIT macros declared.
Local macros shift a signed integer which brings
unespected results. For example:
(unsigned long)(1 << 31) => 0xffffffff80000000
shift.c:
int main() {
printf("%lx\n", (unsigned long)(1 << 31));
printf("%lx\n", (unsigned long)(1U << 31));
return 0;
}
...
$ ./shift
ffffffff80000000
80000000
...
So just remove redundant, less safe macro declarations.
Suggested-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/20210730134048.8736-1-fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
remove some unused static variables. One of them
is used to toggle on the BT coexistence mechanism,
but it is always enabled and it's not conditioned
to the value of the related parameter.
Remove unused field of the registry_priv struct as
well, they were intended for hosting the parameters
this patch rids.
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/20210729125417.4380-1-fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
remove all code branchings tied to dual band support. The device
works only on 2.4Ghz band so there's no need to check which
band we are on. Removed all code branches that would be valid
only for 5Ghz for it's dead code. Removed enums, table fields
indexing by band type, function arguments passing current
band type and all other thing related to telling us
which band we are on.
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/72bb27f6a7b3be607f93f5b406d863dd08376986.1624367071.git.fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
since rtl8723bs card allows only 20Mhz and 40Mhz channels,
rename enum items related to channel bonding accordingly to
the only composite channel bandwidth allowed in 2.4Ghz
(i.e. 40Mhz) in a HT context (since VHT isn't supported)
Example:
VHT_DATA_SC_20_LOWER_OF_80MHZ ->
HT_DATA_SC_LOWER_OF_40MHZ
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/a4172419996bdcaf96f0d9b5438b3b2372ff69b7.1624367071.git.fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
