28 Sep, 2022
1 commit
-
[ Upstream commit 782b1f70f8a8b28571949d2ba43fe88b96d75ec3 ]
OpenWrt's UML with 5.15 was producing odd errors/warnings during preinit
part of the early userspace portion:|[ 0.000000] Kernel command line: ubd0=root.img root=98:0 console=tty
|[...]
|[ 0.440000] random: jshn: uninitialized urandom read (4 bytes read)
|[ 0.460000] random: jshn: uninitialized urandom read (4 bytes read)
|/etc/preinit: line 47: can't create /dev/tty: No such device or address
|/etc/preinit: line 48: can't create /dev/tty: No such device or address
|/etc/preinit: line 58: can't open /dev/tty: No such device or address
|[...] repeated many timesThat "/dev/tty" came from the command line (which is automatically
added if no console= parameter was specified for the uml binary).The TLDP project tells the following about the /dev/tty:
| /dev/tty stands for the controlling terminal (if any) for the current
| process.[...]
| /dev/tty is something like a link to the actually terminal device[..]The "(if any)" is important here, since it's possible for processes to
not have a controlling terminal.I think this was a simple typo and the author wanted tty0 there.
CC: Thomas Meyer
Fixes: d7ffac33631b ("um: stdio_console: Make preferred console")
Signed-off-by: Christian Lamparter
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin
25 Aug, 2022
1 commit
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[ Upstream commit dda520d07b95072a0b63f6c52a8eb566d08ea897 ]
QEMU has a -no-reboot option, which halts instead of reboots when the
guest asks to reboot. This is invaluable when used with
CONFIG_PANIC_TIMEOUT=-1 (and panic_on_warn), because it allows panics
and warnings to be caught immediately in CI. Implement this in UML too,
by way of a basic setup param.Signed-off-by: Jason A. Donenfeld
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin
17 Aug, 2022
3 commits
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[ Upstream commit 9e70cbd11b03889c92462cf52edb2bd023c798fa ]
Initialising the hwrng struct with zeros causes a
compile-time sparse warning:$ ARCH=um make -j10 W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'
...
CHECK arch/um/drivers/random.c
arch/um/drivers/random.c:31:31: sparse: warning: Using plain integer as NULL pointerFix the warning by not initialising the hwrng struct
with zeros as it is initialised anyway during module
init.Fixes: 72d3e093afae ("um: random: Register random as hwrng-core device")
Reported-by: kernel test robot
Signed-off-by: Christopher Obbard
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin -
commit 0b9ba6135d7f18b82f3d8bebb55ded725ba88e0e upstream.
UML generally does not provide access to special CPU instructions like
RDRAND, and execution tends to be rather deterministic, with no real
hardware interrupts, making good randomness really very hard, if not
all together impossible. Not only is this a security eyebrow raiser, but
it's also quite annoying when trying to do various pieces of UML-based
automation that takes a long time to boot, if ever.Fix this by trivially calling getrandom() in the host and using that
seed as "bootloader randomness", which initializes the rng immediately
at UML boot.The old behavior can be restored the same way as on any other arch, by
way of CONFIG_TRUST_BOOTLOADER_RANDOMNESS=n or
random.trust_bootloader=0. So seen from that perspective, this just
makes UML act like other archs, which is positive in its own right.Additionally, wire up arch_get_random_{int,long}() in the same way, so
that reseeds can also make use of the host RNG, controllable by
CONFIG_TRUST_CPU_RANDOMNESS and random.trust_cpu, per usual.Cc: stable@vger.kernel.org
Acked-by: Johannes Berg
Acked-By: Anton Ivanov
Signed-off-by: Jason A. Donenfeld
Signed-off-by: Greg Kroah-Hartman -
commit c6496e0a4a90d8149203c16323cff3fa46e422e7 upstream.
Commit e3a33af812c6 ("um: fix and optimize xor select template for CONFIG64 and timetravel mode")
caused a build regression when CONFIG_XOR_BLOCKS and CONFIG_UML_TIME_TRAVEL_SUPPORT
are selected.
Fix it by removing the straying parenthesis.Cc: stable@vger.kernel.org
Fixes: e3a33af812c6 ("um: fix and optimize xor select template for CONFIG64 and timetravel mode")
Signed-off-by: Benjamin Beichler
[rw: Added commit message]
Signed-off-by: Richard Weinberger
Signed-off-by: Greg Kroah-Hartman
29 Jul, 2022
2 commits
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[ Upstream commit af9fb41ed315ce95f659f0b10b4d59a71975381d ]
If a device implementation crashes, virtio_uml will mark it
as dead by calling virtio_break_device() and scheduling the
work that will remove it.This still seems like the right thing to do, but it's done
directly while reading the message, and if time-travel is
used, this is in the time-travel handler, outside of the
normal Linux machinery. Therefore, we cannot acquire locks
or do normal "linux-y" things because e.g. lockdep will be
confused about the context.Move handling this situation out of the read function and
into the actual IRQ handler and response handling instead,
so that in the case of time-travel we don't call it in the
wrong context.Chances are the system will still crash immediately, since
the device implementation crashing may also cause the time-
travel controller to go down, but at least all of that now
happens without strange warnings from lockdep.Fixes: c8177aba37ca ("um: time-travel: rework interrupt handling in ext mode")
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin -
[ Upstream commit db0dd9cee82270e032123169ceff659eced5115d ]
Allow the virtio_uml device to be probed from the devicetree so that
sub-devices can be specified using the standard virtio bindings, for
example:virtio@1 {
compatible = "virtio,uml";
socket-path = "i2c.sock";
virtio-device-id = ;i2c-controller {
compatible = "virtio,device22";
#address-cells = ;
#size-cells = ;light-sensor@01 {
compatible = "ti,opt3001";
reg = ;
};
};
};Signed-off-by: Vincent Whitchurch
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin
23 Jul, 2022
2 commits
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commit 564d998106397394b6aad260f219b882b3347e62 upstream.
Implement apply_returns() stub for UM, just like all the other patching
routines.Fixes: 15e67227c49a ("x86: Undo return-thunk damage")
Reported-by: Randy Dunlap
Signed-off-by: Borislav Petkov
Link: https://lore.kernel.org/r/Ys%2Ft45l%2FgarIrD0u@worktop.programming.kicks-ass.net
Signed-off-by: Greg Kroah-Hartman -
commit 7508500900814d14e2e085cdc4e28142721abbdf upstream.
Rewrite retpoline thunk call sites to be indirect calls for
spectre_v2=off. This ensures spectre_v2=off is as near to a
RETPOLINE=n build as possible.This is the replacement for objtool writing alternative entries to
ensure the same and achieves feature-parity with the previous
approach.One noteworthy feature is that it relies on the thunks to be in
machine order to compute the register index.Specifically, this does not yet address the Jcc __x86_indirect_thunk_*
calls generated by clang, a future patch will add this.Signed-off-by: Peter Zijlstra (Intel)
Reviewed-by: Borislav Petkov
Acked-by: Josh Poimboeuf
Tested-by: Alexei Starovoitov
Link: https://lore.kernel.org/r/20211026120310.232495794@infradead.org
[cascardo: small conflict fixup at arch/x86/kernel/module.c]
Signed-off-by: Thadeu Lima de Souza Cascardo
Signed-off-by: Greg Kroah-Hartman
15 Jun, 2022
1 commit
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[ Upstream commit d5a9597d6916a76663085db984cb8fe97f0a5c56 ]
Today, all possible serial lines (ssl*=) as well as all
possible consoles (con*=) each share a single interrupt
(with a fixed number) with others of the same type.Now, if you have two lines, say ssl0 and ssl1, and one
of them is connected to an fd you cannot read (e.g. a
file), but the other gets a read interrupt, then both
of them get the interrupt since it's shared. Then, the
read() call will return EOF, since it's a file being
written and there's nothing to read (at least not at
the current offset, at the end).Unfortunately, this is treated as a read error, and we
close this line, losing all the possible output.It might be possible to work around this and make the
IRQ sharing work, however, now that we have dynamically
allocated IRQs that are easy to use, simply use that to
achieve separating between the events; then there's no
interrupt for that line and we never attempt the read
in the first place, thus not closing the line.This manifested itself in the wifi hostap/hwsim tests
where the parallel script communicates via one serial
console and the kernel messages go to another (a file)
and sending data on the communication console caused
the kernel messages to stop flowing into the file.Reported-by: Jouni Malinen
Signed-off-by: Johannes Berg
Acked-By: anton ivanov
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin
09 Jun, 2022
3 commits
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commit 57ae0b67b747031bc41fb44643aa5344ab58607e upstream.
The previous fix here was only partially correct, it did
result in returning a proper error value in case of error,
but it also clobbered the pid that we need to return from
this function (not just zero for success).As a result, it returned 0 here, but later this is treated
as a pid and used to kill the process, but since it's now
0 we kill(0, SIGKILL), which makes UML kill itself rather
than just the helper thread.Fix that and make it more obvious by using a separate
variable for the pid.Fixes: ccf1236ecac4 ("um: fix error return code in winch_tramp()")
Reported-and-tested-by: Nathan Chancellor
Signed-off-by: Johannes Berg
Cc: stable@vger.kernel.org
Signed-off-by: Richard Weinberger
Signed-off-by: Greg Kroah-Hartman -
commit 365719035526e8eda214a1cedb2e1c96e969a0d7 upstream.
If DMA (PCI over virtio) is enabled, then some drivers may
enable CONFIG_DMA_OPS as well, and then we pull in the x86
definition of get_arch_dma_ops(), which uses the dma_ops
symbol, which isn't defined.Since we don't have real DMA ops nor any kind of IOMMU fix
this in the simplest possible way: pull in the asm-generic
file instead of inheriting the x86 one. It's not clear why
those drivers that do (e.g. VDPA) "select DMA_OPS", and if
they'd even work with this, but chances are nobody will be
wanting to do that anyway, so fixing the build failure is
good enough.Reported-by: Randy Dunlap
Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver")
Signed-off-by: Johannes Berg
Tested-by: Randy Dunlap
Acked-by: Randy Dunlap
Cc: stable@vger.kernel.org
Signed-off-by: Richard Weinberger
Signed-off-by: Greg Kroah-Hartman -
commit c200e4bb44e80b343c09841e7caaaca0aac5e5fa upstream.
User mode linux is the last user of the PT_DTRACE flag. Using the flag to indicate
single stepping is a little confusing and worse changing tsk->ptrace without locking
could potentionally cause problems.So use a thread info flag with a better name instead of flag in tsk->ptrace.
Remove the definition PT_DTRACE as uml is the last user.
Cc: stable@vger.kernel.org
Acked-by: Johannes Berg
Tested-by: Kees Cook
Reviewed-by: Oleg Nesterov
Link: https://lkml.kernel.org/r/20220505182645.497868-3-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman"
Signed-off-by: Greg Kroah-Hartman
30 May, 2022
1 commit
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commit 9f13fb0cd11ed2327abff69f6501a2c124c88b5a upstream.
In the event that random_get_entropy() can't access a cycle counter or
similar, falling back to returning 0 is really not the best we can do.
Instead, at least calling random_get_entropy_fallback() would be
preferable, because that always needs to return _something_, even
falling back to jiffies eventually. It's not as though
random_get_entropy_fallback() is super high precision or guaranteed to
be entropic, but basically anything that's not zero all the time is
better than returning zero all the time.This is accomplished by just including the asm-generic code like on
other architectures, which means we can get rid of the empty stub
function here.Cc: Thomas Gleixner
Cc: Arnd Bergmann
Cc: Richard Weinberger
Cc: Anton Ivanov
Acked-by: Johannes Berg
Signed-off-by: Jason A. Donenfeld
Signed-off-by: Greg Kroah-Hartman
14 Apr, 2022
1 commit
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[ Upstream commit e3a33af812c611d99756e2ec61e9d7068d466bdf ]
Due to dropped inclusion of asm-generic/xor.h, xor_block_8regs symbol is
missing with CONFIG64 and break compilation, as the asm/xor_64.h also did
not include it. The patch recreate the logic from arch/x86, which check
whether AVX is available and add fallbacks for 32bit and 64bit config of
um.A very minor additional "fix" is, the return of the macro parameter
instead of NULL, as this is the original intent of the macro, but
this does not change the actual behavior.Fixes: c0ecca6604b8 ("um: enable the use of optimized xor routines in UML")
Signed-off-by: Benjamin Beichler
Acked-By: Anton Ivanov
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin
08 Apr, 2022
1 commit
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commit 1a3a6a2a035bb6c3a7ef4c788d8fd69a7b2d6284 upstream.
Moving to an EPOLL based IRQ controller broke uml_mconsole stop/go
commands. This fixes it and restores stop/go functionality.Fixes: ff6a17989c08 ("Epoll based IRQ controller")
Signed-off-by: Anton Ivanov
Signed-off-by: Richard Weinberger
Signed-off-by: Greg Kroah-Hartman
16 Mar, 2022
1 commit
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commit b81e0c2372e65e5627864ba034433b64b2fc73f5 upstream.
Drop various include not actually used in genhd.h itself, and
move the remaning includes closer together.Signed-off-by: Christoph Hellwig
Reviewed-by: Johannes Thumshirn
Link: https://lore.kernel.org/r/20210920123328.1399408-15-hch@lst.de
Signed-off-by: Jens Axboe
Reported-by: Sudip Mukherjee a
Reported-by: "H. Nikolaus Schaller"
Reported-by: Guenter Roeck
Cc: "Maciej W. Rozycki"
[ resolves MIPS build failure by luck, root cause needs to be fixed in
Linus's tree properly, but this is needed for now to fix the build - gregkh ]
Signed-off-by: Greg Kroah-Hartman
27 Jan, 2022
6 commits
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commit 4b86366fdfbedec42f8f7ee037775f2839921d34 upstream.
This file is generated, we should ignore it.
Fixes: d8fb32f4790f ("um: Add support for host CPU flags and alignment")
Signed-off-by: Johannes Berg
Acked-By: anton.ivanov@cambridgegreys.com
Signed-off-by: Richard Weinberger
Signed-off-by: Greg Kroah-Hartman -
[ Upstream commit 077b7320942b64b0da182aefd83c374462a65535 ]
The function names init_registers() and restore_registers() are used
in several net/ethernet/ and gpu/drm/ drivers for other purposes (not
calls to UML functions), so rename them.This fixes multiple build errors.
Signed-off-by: Randy Dunlap
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Anton Ivanov
Cc: linux-um@lists.infradead.org
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin -
[ Upstream commit 85e73968a040c642fd38f6cba5b73b61f5d0f052 ]
When creating an external event, the current time needs to
be propagated to other participants of a simulation. This
is done in the places here where we kick a virtq etc.However, it must be done for _all_ external events, and
that includes making the initial socket connection and
later closing it. Call time_travel_propagate_time() to do
this before making or closing the socket connection.Apparently, at least for the initial connection creation,
due to the remote side in my use cases using microseconds
(rather than nanoseconds), this wasn't a problem yet; only
started failing between 5.14-rc1 and 5.15-rc1 (didn't test
others much), or possibly depending on the configuration,
where more delays happen before the virtio devices are
initialized.Fixes: 88ce64249233 ("um: Implement time-travel=ext")
Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin -
[ Upstream commit d73820df6437b5d0a57be53faf39db46a0264b3a ]
There were a few 32-bit compile warnings that of course
turned into errors with -Werror, fix the 32-bit build.Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver")
Reported-by: Al Viro
Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin -
[ Upstream commit bbe33504d4a7fdab9011211e55e262c869b3f6cc ]
Rename set_signals() as there's at least one driver that
uses the same name and can now be built on UM due to PCI
support, and thus we can get symbol conflicts.Also rename set_signals_trace() to be consistent.
Reported-by: kernel test robot
Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver")
Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin -
[ Upstream commit 5f8539e2ff962e25b57742ca7106456403abbc94 ]
Many places in the kernel use 'udelay' as an identifier, and
are broken with the current "#define udelay um_udelay". Fix
this by adding an argument to the macro, and do the same to
'ndelay' as well, just in case.Fixes: 0bc8fb4dda2b ("um: Implement ndelay/udelay in time-travel mode")
Reported-by: kernel test robot
Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger
Signed-off-by: Sasha Levin
25 Nov, 2021
1 commit
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commit e21294a7aaae32c5d7154b187113a04db5852e37 upstream.
Now that force_fatal_sig exists it is unnecessary and a bit confusing
to use force_sigsegv in cases where the simpler force_fatal_sig is
wanted. So change every instance we can to make the code clearer.Acked-by: Geert Uytterhoeven
Reviewed-by: Philippe Mathieu-Daudé
Link: https://lkml.kernel.org/r/877de7jrev.fsf@disp2133
Signed-off-by: "Eric W. Biederman"
Cc: Thomas Backlund
Signed-off-by: Greg Kroah-Hartman
10 Sep, 2021
1 commit
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Pull UML updates from Richard Weinberger:
- Support for VMAP_STACK
- Support for splice_write in hostfs
- Fixes for virt-pci
- Fixes for virtio_uml
- Various fixes
* tag 'for-linus-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: fix stub location calculation
um: virt-pci: fix uapi documentation
um: enable VMAP_STACK
um: virt-pci: don't do DMA from stack
hostfs: support splice_write
um: virtio_uml: fix memory leak on init failures
um: virtio_uml: include linux/virtio-uml.h
lib/logic_iomem: fix sparse warnings
um: make PCI emulation driver init/exit static
09 Sep, 2021
2 commits
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Merge more updates from Andrew Morton:
"147 patches, based on 7d2a07b769330c34b4deabeed939325c77a7ec2f.Subsystems affected by this patch series: mm (memory-hotplug, rmap,
ioremap, highmem, cleanups, secretmem, kfence, damon, and vmscan),
alpha, percpu, procfs, misc, core-kernel, MAINTAINERS, lib,
checkpatch, epoll, init, nilfs2, coredump, fork, pids, criu, kconfig,
selftests, ipc, and scripts"* emailed patches from Andrew Morton : (94 commits)
scripts: check_extable: fix typo in user error message
mm/workingset: correct kernel-doc notations
ipc: replace costly bailout check in sysvipc_find_ipc()
selftests/memfd: remove unused variable
Kconfig.debug: drop selecting non-existing HARDLOCKUP_DETECTOR_ARCH
configs: remove the obsolete CONFIG_INPUT_POLLDEV
prctl: allow to setup brk for et_dyn executables
pid: cleanup the stale comment mentioning pidmap_init().
kernel/fork.c: unexport get_{mm,task}_exe_file
coredump: fix memleak in dump_vma_snapshot()
fs/coredump.c: log if a core dump is aborted due to changed file permissions
nilfs2: use refcount_dec_and_lock() to fix potential UAF
nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group
nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group
nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group
nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group
nilfs2: fix NULL pointer in nilfs_##name##_attr_release
nilfs2: fix memory leak in nilfs_sysfs_create_device_group
trap: cleanup trap_init()
init: move usermodehelper_enable() to populate_rootfs()
... -
There are some empty trap_init() definitions in different ARCHs, Introduce
a new weak trap_init() function to clean them up.Link: https://lkml.kernel.org/r/20210812123602.76356-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang
Acked-by: Russell King (Oracle) [arm32]
Acked-by: Vineet Gupta [arc]
Acked-by: Michael Ellerman [powerpc]
Cc: Yoshinori Sato
Cc: Ley Foon Tan
Cc: Jonas Bonn
Cc: Stefan Kristiansson
Cc: Stafford Horne
Cc: James E.J. Bottomley
Cc: Helge Deller
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Paul Walmsley
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Anton Ivanov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Sep, 2021
1 commit
-
Pull tracing updates from Steven Rostedt:
- simplify the Kconfig use of FTRACE and TRACE_IRQFLAGS_SUPPORT
- bootconfig can now start histograms
- bootconfig supports group/all enabling
- histograms now can put values in linear size buckets
- execnames can be passed to synthetic events
- introduce "event probes" that attach to other events and can retrieve
data from pointers of fields, or record fields as different types (a
pointer to a string as a string instead of just a hex number)- various fixes and clean ups
* tag 'trace-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (35 commits)
tracing/doc: Fix table format in histogram code
selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes
selftests/ftrace: Add selftest for testing eprobe events on synthetic events
selftests/ftrace: Add test case to test adding and removing of event probe
selftests/ftrace: Fix requirement check of README file
selftests/ftrace: Add clear_dynamic_events() to test cases
tracing: Add a probe that attaches to trace events
tracing/probes: Reject events which have the same name of existing one
tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs
tracing/probe: Change traceprobe_set_print_fmt() to take a type
tracing/probes: Use struct_size() instead of defining custom macros
tracing/probes: Allow for dot delimiter as well as slash for system names
tracing/probe: Have traceprobe_parse_probe_arg() take a const arg
tracing: Have dynamic events have a ref counter
tracing: Add DYNAMIC flag for dynamic events
tracing: Replace deprecated CPU-hotplug functions.
MAINTAINERS: Add an entry for os noise/latency
tracepoint: Fix kerneldoc comments
bootconfig/tracing/ktest: Update ktest example for boot-time tracing
tools/bootconfig: Use per-group/all enable option in ftrace2bconf script
...
04 Sep, 2021
1 commit
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Pull Kbuild updates from Masahiro Yamada:
- Add -s option (strict mode) to merge_config.sh to make it fail when
any symbol is redefined.- Show a warning if a different compiler is used for building external
modules.- Infer --target from ARCH for CC=clang to let you cross-compile the
kernel without CROSS_COMPILE.- Make the integrated assembler default (LLVM_IAS=1) for CC=clang.
- Add to the kernel source instead of borrowing
from the compiler.- Add Nick Desaulniers as a Kbuild reviewer.
- Drop stale cc-option tests.
- Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG
to handle symbols in inline assembly.- Show a warning if 'FORCE' is missing for if_changed rules.
- Various cleanups
* tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits)
kbuild: redo fake deps at include/ksym/*.h
kbuild: clean up objtool_args slightly
modpost: get the *.mod file path more simply
checkkconfigsymbols.py: Fix the '--ignore' option
kbuild: merge vmlinux_link() between ARCH=um and other architectures
kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh
kbuild: merge vmlinux_link() between the ordinary link and Clang LTO
kbuild: remove stale *.symversions
kbuild: remove unused quiet_cmd_update_lto_symversions
gen_compile_commands: extract compiler command from a series of commands
x86: remove cc-option-yn test for -mtune=
arc: replace cc-option-yn uses with cc-option
s390: replace cc-option-yn uses with cc-option
ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild
sparc: move the install rule to arch/sparc/Makefile
security: remove unneeded subdir-$(CONFIG_...)
kbuild: sh: remove unused install script
kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y
kbuild: Switch to 'f' variants of integrated assembler flag
kbuild: Shuffle blank line to improve comment meaning
...
02 Sep, 2021
3 commits
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Pull printk updates from Petr Mladek:
- Optionally, provide an index of possible printk messages via
/printk/index/. It can be used when monitoring important
kernel messages on a farm of various hosts. The monitor has to be
updated when some messages has changed or are not longer available by
a newly deployed kernel.- Add printk.console_no_auto_verbose boot parameter. It allows to
generate crash dump even with slow consoles in a reasonable time
frame.- Remove printk_safe buffers. The messages are always stored directly
to the main logbuffer, even in NMI or recursive context. Also it
allows to serialize syslog operations by a mutex instead of a spin
lock.- Misc clean up and build fixes.
* tag 'printk-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
printk/index: Fix -Wunused-function warning
lib/nmi_backtrace: Serialize even messages about idle CPUs
printk: Add printk.console_no_auto_verbose boot parameter
printk: Remove console_silent()
lib/test_scanf: Handle n_bits == 0 in random tests
printk: syslog: close window between wait and read
printk: convert @syslog_lock to mutex
printk: remove NMI tracking
printk: remove safe buffers
printk: track/limit recursion
lib/nmi_backtrace: explicitly serialize banner and regs
printk: Move the printk() kerneldoc comment to its new home
printk/index: Fix warning about missing prototypes
MIPS/asm/printk: Fix build failure caused by printk
printk: index: Add indexing support to dev_printk
printk: Userspace format indexing support
printk: Rework parse_prefix into printk_parse_prefix
printk: Straighten out log_flags into printk_info_flags
string_helpers: Escape double quotes in escape_special
printk/console: Check consistent sequence number when handling race in console_unlock() -
Pull asm-generic updates from Arnd Bergmann:
"The main content for 5.15 is a series that cleans up the handling of
strncpy_from_user() and strnlen_user(), removing a lot of slightly
incorrect versions of these in favor of the lib/strn*.c helpers that
implement these correctly and more efficiently.The only architectures that retain a private version now are mips,
ia64, um and parisc. I had offered to convert those at all, but Thomas
Bogendoerfer wanted to keep the mips version for the moment until he
had a chance to do regression testing.The branch also contains two patches for bitops and for ffs()"
* tag 'asm-generic-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
bitops/non-atomic: make @nr unsigned to avoid any DIV
asm-generic: ffs: Drop bogus reference to ffz location
asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols
asm-generic: remove extra strn{cpy_from,len}_user declarations
asm-generic: uaccess: remove inline strncpy_from_user/strnlen_user
s390: use generic strncpy/strnlen from_user
microblaze: use generic strncpy/strnlen from_user
csky: use generic strncpy/strnlen from_user
arc: use generic strncpy/strnlen from_user
hexagon: use generic strncpy/strnlen from_user
h8300: remove stale strncpy_from_user
asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user -
Pull tty / serial updates from Greg KH:
"Here is the "big" set of tty/serial driver patches for 5.15-rc1Nothing major in here at all, just some driver updates and more
cleanups on old tty apis and code that needed it that includes:- tty.h cleanup of things that didn't belong in it
- other tty cleanups by Jiri
- driver cleanups
- rs485 support added to amba-pl011 driver
- dts updates
- stm32 serial driver updates
- other minor fixes and driver updates
All have been in linux-next for a while with no reported problems"
* tag 'tty-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (83 commits)
tty: serial: uartlite: Use read_poll_timeout for a polling loop
tty: serial: uartlite: Use constants in early_uartlite_putc
tty: Fix data race between tiocsti() and flush_to_ldisc()
serial: vt8500: Use of_device_get_match_data
serial: tegra: Use of_device_get_match_data
serial: 8250_ingenic: Use of_device_get_match_data
tty: serial: linflexuart: Remove redundant check to simplify the code
tty: serial: fsl_lpuart: do software reset for imx7ulp and imx8qxp
tty: serial: fsl_lpuart: enable two stop bits for lpuart32
tty: serial: fsl_lpuart: fix the wrong mapbase value
mxser: use semi-colons instead of commas
tty: moxa: use semi-colons instead of commas
tty: serial: fsl_lpuart: check dma_tx_in_progress in tx dma callback
tty: replace in_irq() with in_hardirq()
serial: sh-sci: fix break handling for sysrq
serial: stm32: use devm_platform_get_and_ioremap_resource()
serial: stm32: use the defined variable to simplify code
Revert "arm pl011 serial: support multi-irq request"
tty: serial: samsung: Add Exynos850 SoC data
tty: serial: samsung: Fix driver data macros style
...
01 Sep, 2021
1 commit
-
Pull networking updates from Jakub Kicinski:
"Core:- Enable memcg accounting for various networking objects.
BPF:
- Introduce bpf timers.
- Add perf link and opaque bpf_cookie which the program can read out
again, to be used in libbpf-based USDT library.- Add bpf_task_pt_regs() helper to access user space pt_regs in
kprobes, to help user space stack unwinding.- Add support for UNIX sockets for BPF sockmap.
- Extend BPF iterator support for UNIX domain sockets.
- Allow BPF TCP congestion control progs and bpf iterators to call
bpf_setsockopt(), e.g. to switch to another congestion control
algorithm.Protocols:
- Support IOAM Pre-allocated Trace with IPv6.
- Support Management Component Transport Protocol.
- bridge: multicast: add vlan support.
- netfilter: add hooks for the SRv6 lightweight tunnel driver.
- tcp:
- enable mid-stream window clamping (by user space or BPF)
- allow data-less, empty-cookie SYN with TFO_SERVER_COOKIE_NOT_REQD
- more accurate DSACK processing for RACK-TLP- mptcp:
- add full mesh path manager option
- add partial support for MP_FAIL
- improve use of backup subflows
- optimize option processing- af_unix: add OOB notification support.
- ipv6: add IFLA_INET6_RA_MTU to expose MTU value advertised by the
router.- mac80211: Target Wake Time support in AP mode.
- can: j1939: extend UAPI to notify about RX status.
Driver APIs:
- Add page frag support in page pool API.
- Many improvements to the DSA (distributed switch) APIs.
- ethtool: extend IRQ coalesce uAPI with timer reset modes.
- devlink: control which auxiliary devices are created.
- Support CAN PHYs via the generic PHY subsystem.
- Proper cross-chip support for tag_8021q.
- Allow TX forwarding for the software bridge data path to be
offloaded to capable devices.Drivers:
- veth: more flexible channels number configuration.
- openvswitch: introduce per-cpu upcall dispatch.
- Add internet mix (IMIX) mode to pktgen.
- Transparently handle XDP operations in the bonding driver.
- Add LiteETH network driver.
- Renesas (ravb):
- support Gigabit Ethernet IP- NXP Ethernet switch (sja1105):
- fast aging support
- support for "H" switch topologies
- traffic termination for ports under VLAN-aware bridge- Intel 1G Ethernet
- support getcrosststamp() with PCIe PTM (Precision Time
Measurement) for better time sync
- support Credit-Based Shaper (CBS) offload, enabling HW traffic
prioritization and bandwidth reservation- Broadcom Ethernet (bnxt)
- support pulse-per-second output
- support larger Rx rings- Mellanox Ethernet (mlx5)
- support ethtool RSS contexts and MQPRIO channel mode
- support LAG offload with bridging
- support devlink rate limit API
- support packet sampling on tunnels- Huawei Ethernet (hns3):
- basic devlink support
- add extended IRQ coalescing support
- report extended link state- Netronome Ethernet (nfp):
- add conntrack offload support- Broadcom WiFi (brcmfmac):
- add WPA3 Personal with FT to supported cipher suites
- support 43752 SDIO device- Intel WiFi (iwlwifi):
- support scanning hidden 6GHz networks
- support for a new hardware family (Bz)- Xen pv driver:
- harden netfront against malicious backends- Qualcomm mobile
- ipa: refactor power management and enable automatic suspend
- mhi: move MBIM to WWAN subsystem interfacesRefactor:
- Ambient BPF run context and cgroup storage cleanup.
- Compat rework for ndo_ioctl.
Old code removal:
- prism54 remove the obsoleted driver, deprecated by the p54 driver.
- wan: remove sbni/granch driver"
* tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1715 commits)
net: Add depends on OF_NET for LiteX's LiteETH
ipv6: seg6: remove duplicated include
net: hns3: remove unnecessary spaces
net: hns3: add some required spaces
net: hns3: clean up a type mismatch warning
net: hns3: refine function hns3_set_default_feature()
ipv6: remove duplicated 'net/lwtunnel.h' include
net: w5100: check return value after calling platform_get_resource()
net/mlxbf_gige: Make use of devm_platform_ioremap_resourcexxx()
net: mdio: mscc-miim: Make use of the helper function devm_platform_ioremap_resource()
net: mdio-ipq4019: Make use of devm_platform_ioremap_resource()
fou: remove sparse errors
ipv4: fix endianness issue in inet_rtm_getroute_build_skb()
octeontx2-af: Set proper errorcode for IPv4 checksum errors
octeontx2-af: Fix static code analyzer reported issues
octeontx2-af: Fix mailbox errors in nix_rss_flowkey_cfg
octeontx2-af: Fix loop in free and unmap counter
af_unix: fix potential NULL deref in unix_dgram_connect()
dpaa2-eth: Replace strlcpy with strscpy
octeontx2-af: Use NDC TX for transmit packet data
...
27 Aug, 2021
7 commits
-
The API changes were propagated to most drivers, but clearly
arch/um/drivers/ was missed, perhaps due to looking only at
the drivers/ folder. Fix that.Fixes: f3ccfda19319 ("ethtool: extend coalesce setting uAPI with CQE mode")
Signed-off-by: Johannes Berg
Link: https://lore.kernel.org/r/20210827094759.f3ab06684bd0.I985181cc00fe017cfe6413d9e1bb720cbe852e6d@changeid
Signed-off-by: Jakub Kicinski -
In commit 9f0b4807a44f ("um: rework userspace stubs to not hard-code
stub location") I changed stub_segv_handler() to do a calculation with
a pointer to a stack variable to find the data page that we're using
for the stack and the rest of the data. This same commit was meant to
do it as well for stub_clone_handler(), but the change inadvertently
went into commit 84b2789d6115 ("um: separate child and parent errors
in clone stub") instead.This was reported to not be compiled correctly by gcc 5, causing the
code to crash here. I'm not sure why, perhaps it's UB because the var
isn't initialized? In any case, this trick always seemed bad, so just
create a new inline function that does the calculation in assembly.Reported-by: subashab@codeaurora.org
Fixes: 9f0b4807a44f ("um: rework userspace stubs to not hard-code stub location")
Fixes: 84b2789d6115 ("um: separate child and parent errors in clone stub")
Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
This works just fine, so select HAVE_ARCH_VMAP_STACK to
let users enable VMAP_STACK if desired.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
When enabling VMAP_STACK, SG helpers immediately complained
that we were doing DMA from stack. Use per-CPU variables to
avoid that.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
If initialization fails, e.g. because the connection failed,
we leak the 'vu_dev'. Fix that. Reported by smatch.Fixes: 5d38f324993f ("um: drivers: Add virtio vhost-user driver")
Signed-off-by: Johannes Berg
Acked-By: Anton Ivanov
Signed-off-by: Richard Weinberger -
This fixes a sparse warning, since the function defined
here should have a declaration (or be static).Reported-by: kernel test robot
Fixes: 43c590cb8666 ("um: virtio/pci: enable suspend/resume")
Signed-off-by: Johannes Berg
Acked-By: Anton Ivanov
Signed-off-by: Richard Weinberger -
The functions aren't used elsewhere, so they can be static.
Reported-by: kernel test robot
Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver")
Signed-off-by: Johannes Berg
Acked-By: Anton Ivanov
Signed-off-by: Richard Weinberger