user/sven/linux.git, branch v6.11.4

Linux 6.11.4

2024-10-17T13:27:02Z

Link: https://lore.kernel.org/r/20241014141044.974962104@linuxfoundation.org Tested-by: Ronald Warsow Tested-by: Florian Fainelli Tested-by: Peter Schneider Tested-by: Christian Heusel Tested-by: Shuah Khan Link: https://lore.kernel.org/r/20241015112329.364617631@linuxfoundation.org Tested-by: Ronald Warsow Tested-by: Ron Economos Tested-by: Florian Fainelli Tested-by: Linux Kernel Functional Testing Tested-by: Kexy Biscuit Tested-by: Jon Hunter Signed-off-by: Greg Kroah-Hartman

io_uring/rw: fix cflags posting for single issue multishot read

2024-10-17T13:27:02Z

Commit c9d952b9103b600ddafc5d1c0e2f2dbd30f0b805 upstream. If multishot gets disabled, and hence the request will get terminated rather than persist for more iterations, then posting the CQE with the right cflags is still important. Most notably, the buffer reference needs to be included. Refactor the return of __io_read() a bit, so that the provided buffer is always put correctly, and hence returned to the application. Reported-by: Sharon Rosner Link: https://github.com/axboe/liburing/issues/1257 Cc: stable@vger.kernel.org Fixes: 2a975d426c82 ("io_uring/rw: don't allow multishot reads without NOWAIT support") Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman

PCI: Pass domain number to pci_bus_release_domain_nr() explicitly

2024-10-17T13:27:02Z

commit 0cca961a026177af69044f10d6ae76d8ce043764 upstream. The pci_bus_release_domain_nr() API is supposed to free the domain number allocated by pci_bus_find_domain_nr(). Most of the callers of pci_bus_find_domain_nr(), store the domain number in pci_bus::domain_nr. As such, the pci_bus_release_domain_nr() implicitly frees the domain number by dereferencing 'struct pci_bus'. However, one of the callers of this API, the PCI endpoint subsystem, doesn't have 'struct pci_bus', so it only passes NULL. Due to this, the API will end up dereferencing the NULL pointer. To fix this issue, pass the domain number to this API explicitly. Since 'struct pci_bus' is not used for anything else other than extracting the domain number, it makes sense to pass the domain number directly. Fixes: 0328947c5032 ("PCI: endpoint: Assign PCI domain number for endpoint controllers") Closes: https://lore.kernel.org/linux-pci/c0c40ddb-bf64-4b22-9dd1-8dbb18aa2813@stanley.mountain Link: https://lore.kernel.org/linux-pci/20240912053025.25314-1-manivannan.sadhasivam@linaro.org Reported-by: Dan Carpenter Signed-off-by: Manivannan Sadhasivam [kwilczynski: commit log] Signed-off-by: Krzysztof Wilczyński Signed-off-by: Greg Kroah-Hartman

secretmem: disable memfd_secret() if arch cannot set direct map

2024-10-17T13:27:02Z

commit 532b53cebe58f34ce1c0f34d866f5c0e335c53c6 upstream. Return -ENOSYS from memfd_secret() syscall if !can_set_direct_map(). This is the case for example on some arm64 configurations, where marking 4k PTEs in the direct map not present can only be done if the direct map is set up at 4k granularity in the first place (as ARM's break-before-make semantics do not easily allow breaking apart large/gigantic pages). More precisely, on arm64 systems with !can_set_direct_map(), set_direct_map_invalid_noflush() is a no-op, however it returns success (0) instead of an error. This means that memfd_secret will seemingly "work" (e.g. syscall succeeds, you can mmap the fd and fault in pages), but it does not actually achieve its goal of removing its memory from the direct map. Note that with this patch, memfd_secret() will start erroring on systems where can_set_direct_map() returns false (arm64 with CONFIG_RODATA_FULL_DEFAULT_ENABLED=n, CONFIG_DEBUG_PAGEALLOC=n and CONFIG_KFENCE=n), but that still seems better than the current silent failure. Since CONFIG_RODATA_FULL_DEFAULT_ENABLED defaults to 'y', most arm64 systems actually have a working memfd_secret() and aren't be affected. From going through the iterations of the original memfd_secret patch series, it seems that disabling the syscall in these scenarios was the intended behavior [1] (preferred over having set_direct_map_invalid_noflush return an error as that would result in SIGBUSes at page-fault time), however the check for it got dropped between v16 [2] and v17 [3], when secretmem moved away from CMA allocations. [1]: https://lore.kernel.org/lkml/20201124164930.GK8537@kernel.org/ [2]: https://lore.kernel.org/lkml/20210121122723.3446-11-rppt@kernel.org/#t [3]: https://lore.kernel.org/lkml/20201125092208.12544-10-rppt@kernel.org/ Link: https://lkml.kernel.org/r/20241001080056.784735-1-roypat@amazon.co.uk Fixes: 1507f51255c9 ("mm: introduce memfd_secret system call to create "secret" memory areas") Signed-off-by: Patrick Roy Reviewed-by: Mike Rapoport (Microsoft) Cc: Alexander Graf Cc: David Hildenbrand Cc: James Gowans Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

fs/proc/kcore.c: allow translation of physical memory addresses

2024-10-17T13:27:02Z

commit 3d5854d75e3187147613130561b58f0b06166172 upstream. When /proc/kcore is read an attempt to read the first two pages results in HW-specific page swap on s390 and another (so called prefix) pages are accessed instead. That leads to a wrong read. Allow architecture-specific translation of memory addresses using kc_xlate_dev_mem_ptr() and kc_unxlate_dev_mem_ptr() callbacks similarily to /dev/mem xlate_dev_mem_ptr() and unxlate_dev_mem_ptr() callbacks. That way an architecture can deal with specific physical memory ranges. Re-use the existing /dev/mem callback implementation on s390, which handles the described prefix pages swapping correctly. For other architectures the default callback is basically NOP. It is expected the condition (vaddr == __va(__pa(vaddr))) always holds true for KCORE_RAM memory type. Link: https://lkml.kernel.org/r/20240930122119.1651546-1-agordeev@linux.ibm.com Signed-off-by: Alexander Gordeev Suggested-by: Heiko Carstens Cc: Vasily Gorbik Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

kthread: unpark only parked kthread

2024-10-17T13:27:02Z

commit 214e01ad4ed7158cab66498810094fac5d09b218 upstream. Calling into kthread unparking unconditionally is mostly harmless when the kthread is already unparked. The wake up is then simply ignored because the target is not in TASK_PARKED state. However if the kthread is per CPU, the wake up is preceded by a call to kthread_bind() which expects the task to be inactive and in TASK_PARKED state, which obviously isn't the case if it is unparked. As a result, calling kthread_stop() on an unparked per-cpu kthread triggers such a warning: WARNING: CPU: 0 PID: 11 at kernel/kthread.c:525 __kthread_bind_mask kernel/kthread.c:525 kthread_stop+0x17a/0x630 kernel/kthread.c:707 destroy_workqueue+0x136/0xc40 kernel/workqueue.c:5810 wg_destruct+0x1e2/0x2e0 drivers/net/wireguard/device.c:257 netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10693 default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11769 ops_exit_list net/core/net_namespace.c:178 [inline] cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Fix this with skipping unecessary unparking while stopping a kthread. Link: https://lkml.kernel.org/r/20240913214634.12557-1-frederic@kernel.org Fixes: 5c25b5ff89f0 ("workqueue: Tag bound workers with KTHREAD_IS_PER_CPU") Signed-off-by: Frederic Weisbecker Reported-by: syzbot+943d34fa3cf2191e3068@syzkaller.appspotmail.com Tested-by: syzbot+943d34fa3cf2191e3068@syzkaller.appspotmail.com Suggested-by: Thomas Gleixner Cc: Hillf Danton Cc: Tejun Heo Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

idpf: use actual mbx receive payload length

2024-10-17T13:27:01Z

commit 640f70063e6d3a76a63f57e130fba43ba8c7e980 upstream. When a mailbox message is received, the driver is checking for a non 0 datalen in the controlq descriptor. If it is valid, the payload is attached to the ctlq message to give to the upper layer. However, the payload response size given to the upper layer was taken from the buffer metadata which is _always_ the max buffer size. This meant the API was returning 4K as the payload size for all messages. This went unnoticed since the virtchnl exchange response logic was checking for a response size less than 0 (error), not less than exact size, or not greater than or equal to the max mailbox buffer size (4K). All of these checks will pass in the success case since the size provided is always 4K. However, this breaks anyone that wants to validate the exact response size. Fetch the actual payload length from the value provided in the descriptor data_len field (instead of the buffer metadata). Unfortunately, this means we lose some extra error parsing for variable sized virtchnl responses such as create vport and get ptypes. However, the original checks weren't really helping anyways since the size was _always_ 4K. Fixes: 34c21fa894a1 ("idpf: implement virtchnl transaction manager") Cc: stable@vger.kernel.org # 6.9+ Signed-off-by: Joshua Hay Reviewed-by: Przemek Kitszel Tested-by: Krishneil Singh Signed-off-by: Tony Nguyen Signed-off-by: Greg Kroah-Hartman

PM: domains: Fix alloc/free in dev_pm_domain_attach|detach_list()

2024-10-17T13:27:01Z

commit 7738568885f2eaecfc10a3f530a2693e5f0ae3d0 upstream. The dev_pm_domain_attach|detach_list() functions are not resource managed, hence they should not use devm_* helpers to manage allocation/freeing of data. Let's fix this by converting to the traditional alloc/free functions. Fixes: 161e16a5e50a ("PM: domains: Add helper functions to attach/detach multiple PM domains") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Acked-by: Viresh Kumar Link: https://lore.kernel.org/r/20241002122232.194245-3-ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman

btrfs: add cancellation points to trim loops

2024-10-17T13:27:01Z

commit 69313850dce33ce8c24b38576a279421f4c60996 upstream. There are reports that system cannot suspend due to running trim because the task responsible for trimming the device isn't able to finish in time, especially since we have a free extent discarding phase, which can trim a lot of unallocated space. There are no limits on the trim size (unlike the block group part). Since trime isn't a critical call it can be interrupted at any time, in such cases we stop the trim, report the amount of discarded bytes and return an error. Link: https://bugzilla.kernel.org/show_bug.cgi?id=219180 Link: https://bugzilla.suse.com/show_bug.cgi?id=1229737 CC: stable@vger.kernel.org # 5.15+ Signed-off-by: Luca Stefani Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman

btrfs: split remaining space to discard in chunks

2024-10-17T13:27:01Z

commit a99fcb0158978ed332009449b484e5f3ca2d7df4 upstream. Per Qu Wenruo in case we have a very large disk, e.g. 8TiB device, mostly empty although we will do the split according to our super block locations, the last super block ends at 256G, we can submit a huge discard for the range [256G, 8T), causing a large delay. Split the space left to discard based on BTRFS_MAX_DISCARD_CHUNK_SIZE in preparation of introduction of cancellation points to trim. The value of the chunk size is arbitrary, it can be higher or derived from actual device capabilities but we can't easily read that using bio_discard_limit(). Link: https://bugzilla.kernel.org/show_bug.cgi?id=219180 Link: https://bugzilla.suse.com/show_bug.cgi?id=1229737 CC: stable@vger.kernel.org # 5.15+ Signed-off-by: Luca Stefani Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman