linux/Documentation, branch v6.12

Merge tag 'mm-hotfixes-stable-2024-11-16-15-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-11-17T00:00:38Z

Pull hotfixes from Andrew Morton: "10 hotfixes, 7 of which are cc:stable. All singletons, please see the changelogs for details" * tag 'mm-hotfixes-stable-2024-11-16-15-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mm: revert "mm: shmem: fix data-race in shmem_getattr()" ocfs2: uncache inode which has failed entering the group mm: fix NULL pointer dereference in alloc_pages_bulk_noprof mm, doc: update read_ahead_kb for MADV_HUGEPAGE fs/proc/task_mmu: prevent integer overflow in pagemap_scan_get_args() sched/task_stack: fix object_is_on_stack() for KASAN tagged pointers crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32 mm/mremap: fix address wraparound in move_page_tables() tools/mm: fix compile error mm, swap: fix allocation and scanning race with swapoff

mm, doc: update read_ahead_kb for MADV_HUGEPAGE

2024-11-15T06:43:48Z

MADV_HUGEPAGE is a new addition to readahead with behavior distinct from normal pages. To prevent confusion, we should update the documentation accordingly. Link: https://lkml.kernel.org/r/20241113150711.1685-1-laoar.shao@gmail.com Signed-off-by: Yafang Shao Cc: David Hildenbrand Cc: Matthew Wilcox Signed-off-by: Andrew Morton

Merge tag 'net-6.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2024-11-14T18:05:33Z

Pull networking fixes from Paolo Abeni: "Including fixes from bluetooth. Quite calm week. No new regression under investigation. Current release - regressions: - eth: revert "igb: Disable threaded IRQ for igb_msix_other" Current release - new code bugs: - bluetooth: btintel: direct exception event to bluetooth stack Previous releases - regressions: - core: fix data-races around sk->sk_forward_alloc - netlink: terminate outstanding dump on socket close - mptcp: error out earlier on disconnect - vsock: fix accept_queue memory leak - phylink: ensure PHY momentary link-fails are handled - eth: mlx5: - fix null-ptr-deref in add rule err flow - lock FTE when checking if active - eth: dwmac-mediatek: fix inverted handling of mediatek,mac-wol Previous releases - always broken: - sched: fix u32's systematic failure to free IDR entries for hnodes. - sctp: fix possible UAF in sctp_v6_available() - eth: bonding: add ns target multicast address to slave device - eth: mlx5: fix msix vectors to respect platform limit - eth: icssg-prueth: fix 1 PPS sync" * tag 'net-6.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (38 commits) net: sched: u32: Add test case for systematic hnode IDR leaks selftests: bonding: add ns multicast group testing bonding: add ns target multicast address to slave device net: ti: icssg-prueth: Fix 1 PPS sync stmmac: dwmac-intel-plat: fix call balance of tx_clk handling routines net: Make copy_safe_from_sockptr() match documentation net: stmmac: dwmac-mediatek: Fix inverted handling of mediatek,mac-wol ipmr: Fix access to mfc_cache_list without lock held samples: pktgen: correct dev to DEV net: phylink: ensure PHY momentary link-fails are handled mptcp: pm: use _rcu variant under rcu_read_lock mptcp: hold pm lock when deleting entry mptcp: update local address flags when setting it net: sched: cls_u32: Fix u32's systematic failure to free IDR entries for hnodes. MAINTAINERS: Re-add cancelled Renesas driver sections Revert "igb: Disable threaded IRQ for igb_msix_other" Bluetooth: btintel: Direct exception event to bluetooth stack Bluetooth: hci_core: Fix calling mgmt_device_connected virtio/vsock: Improve MSG_ZEROCOPY error handling vsock: Fix sk_error_queue memory leak ...

Merge tag 'tpmdd-next-6.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

2024-11-13T21:28:58Z

Pull tpm fixes from Jarkko Sakkinen: "Two bug fixes for TPM bus encryption (the remaining reported issues in the feature)" * tag 'tpmdd-next-6.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd: tpm: Disable TPM on tpm2_create_primary() failure tpm: Opt-in in disable PCR integrity protection

tpm: Opt-in in disable PCR integrity protection

2024-11-13T19:10:45Z

The initial HMAC session feature added TPM bus encryption and/or integrity protection to various in-kernel TPM operations. This can cause performance bottlenecks with IMA, as it heavily utilizes PCR extend operations. In order to mitigate this performance issue, introduce a kernel command-line parameter to the TPM driver for disabling the integrity protection for PCR extend operations (i.e. TPM2_PCR_Extend). Cc: James Bottomley Link: https://lore.kernel.org/linux-integrity/20241015193916.59964-1-zohar@linux.ibm.com/ Fixes: 6519fea6fd37 ("tpm: add hmac checks to tpm2_pcr_extend()") Tested-by: Mimi Zohar Co-developed-by: Roberto Sassu Signed-off-by: Roberto Sassu Co-developed-by: Mimi Zohar Signed-off-by: Mimi Zohar Signed-off-by: Jarkko Sakkinen

Merge tag 'mm-hotfixes-stable-2024-11-12-16-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-11-13T16:58:11Z

Pull misc fixes from Andrew Morton: "10 hotfixes, 7 of which are cc:stable. 7 are MM, 3 are not. All singletons" * tag 'mm-hotfixes-stable-2024-11-12-16-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mm: swapfile: fix cluster reclaim work crash on rotational devices selftests: hugetlb_dio: fixup check for initial conditions to skip in the start mm/thp: fix deferred split queue not partially_mapped: fix mm/gup: avoid an unnecessary allocation call for FOLL_LONGTERM cases nommu: pass NULL argument to vma_iter_prealloc() ocfs2: fix UBSAN warning in ocfs2_verify_volume() nilfs2: fix null-ptr-deref in block_dirty_buffer tracepoint nilfs2: fix null-ptr-deref in block_touch_buffer tracepoint mm: page_alloc: move mlocked flag clearance into free_pages_prepare() mm: count zeromap read and set for swapout and swapin

Merge tag 'landlock-6.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux

2024-11-12T21:01:09Z

Pull landlock fixes from Mickaël Salaün: "This fixes issues in the Landlock's sandboxer sample and documentation, slightly refactors helpers (required for ongoing patch series), and improve/fix a feature merged in v6.12 (signal and abstract UNIX socket scoping)" * tag 'landlock-6.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux: landlock: Optimize scope enforcement landlock: Refactor network access mask management landlock: Refactor filesystem access mask management samples/landlock: Clarify option parsing behaviour samples/landlock: Refactor help message samples/landlock: Fix port parsing in sandboxer landlock: Fix grammar issues in documentation landlock: Improve documentation of previous limitations

net: clarify SO_DEVMEM_DONTNEED behavior in documentation

2024-11-12T02:11:46Z

Document new behavior when the number of frags passed is too big. Signed-off-by: Mina Almasry Link: https://patch.msgid.link/20241107210331.3044434-2-almasrymina@google.com Signed-off-by: Jakub Kicinski

mm: count zeromap read and set for swapout and swapin

2024-11-11T08:00:37Z

When the proportion of folios from the zeromap is small, missing their accounting may not significantly impact profiling. However, it's easy to construct a scenario where this becomes an issue—for example, allocating 1 GB of memory, writing zeros from userspace, followed by MADV_PAGEOUT, and then swapping it back in. In this case, the swap-out and swap-in counts seem to vanish into a black hole, potentially causing semantic ambiguity. On the other hand, Usama reported that zero-filled pages can exceed 10% in workloads utilizing zswap, while Hailong noted that some app in Android have more than 6% zero-filled pages. Before commit 0ca0c24e3211 ("mm: store zero pages to be swapped out in a bitmap"), both zswap and zRAM implemented similar optimizations, leading to these optimized-out pages being counted in either zswap or zRAM counters (with pswpin/pswpout also increasing for zRAM). With zeromap functioning prior to both zswap and zRAM, userspace will no longer detect these swap-out and swap-in actions. We have three ways to address this: 1. Introduce a dedicated counter specifically for the zeromap. 2. Use pswpin/pswpout accounting, treating the zero map as a standard backend. This approach aligns with zRAM's current handling of same-page fills at the device level. However, it would mean losing the optimized-out page counters previously available in zRAM and would not align with systems using zswap. Additionally, as noted by Nhat Pham, pswpin/pswpout counters apply only to I/O done directly to the backend device. 3. Count zeromap pages under zswap, aligning with system behavior when zswap is enabled. However, this would not be consistent with zRAM, nor would it align with systems lacking both zswap and zRAM. Given the complications with options 2 and 3, this patch selects option 1. We can find these counters from /proc/vmstat (counters for the whole system) and memcg's memory.stat (counters for the interested memcg). For example: $ grep -E 'swpin_zero|swpout_zero' /proc/vmstat swpin_zero 1648 swpout_zero 33536 $ grep -E 'swpin_zero|swpout_zero' /sys/fs/cgroup/system.slice/memory.stat swpin_zero 3905 swpout_zero 3985 This patch does not address any specific zeromap bug, but the missing swpout and swpin counts for zero-filled pages can be highly confusing and may mislead user-space agents that rely on changes in these counters as indicators. Therefore, we add a Fixes tag to encourage the inclusion of this counter in any kernel versions with zeromap. Many thanks to Kanchana for the contribution of changing count_objcg_event() to count_objcg_events() to support large folios[1], which has now been incorporated into this patch. [1] https://lkml.kernel.org/r/20241001053222.6944-5-kanchana.p.sridhar@intel.com Link: https://lkml.kernel.org/r/20241107011246.59137-1-21cnbao@gmail.com Fixes: 0ca0c24e3211 ("mm: store zero pages to be swapped out in a bitmap") Co-developed-by: Kanchana P Sridhar Signed-off-by: Barry Song Reviewed-by: Nhat Pham Reviewed-by: Chengming Zhou Acked-by: Johannes Weiner Cc: Usama Arif Cc: Yosry Ahmed Cc: Hailong Liu Cc: David Hildenbrand Cc: Hugh Dickins Cc: Matthew Wilcox (Oracle) Cc: Shakeel Butt Cc: Andi Kleen Cc: Baolin Wang Cc: Chris Li Cc: "Huang, Ying" Cc: Kairui Song Cc: Ryan Roberts Signed-off-by: Andrew Morton

Merge tag 'mm-hotfixes-stable-2024-11-09-22-40' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-11-10T17:04:27Z

Pull misc fixes from Andrew Morton: "20 hotfixes, 14 of which are cc:stable. Three affect DAMON. Lorenzo's five-patch series to address the mmap_region error handling is here also. Apart from that, various singletons" * tag 'mm-hotfixes-stable-2024-11-09-22-40' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mailmap: add entry for Thorsten Blum ocfs2: remove entry once instead of null-ptr-dereference in ocfs2_xa_remove() signal: restore the override_rlimit logic fs/proc: fix compile warning about variable 'vmcore_mmap_ops' ucounts: fix counter leak in inc_rlimit_get_ucounts() selftests: hugetlb_dio: check for initial conditions to skip in the start mm: fix docs for the kernel parameter ``thp_anon=`` mm/damon/core: avoid overflow in damon_feed_loop_next_input() mm/damon/core: handle zero schemes apply interval mm/damon/core: handle zero {aggregation,ops_update} intervals mm/mlock: set the correct prev on failure objpool: fix to make percpu slot allocation more robust mm/page_alloc: keep track of free highatomic mm: resolve faulty mmap_region() error path behaviour mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling mm: refactor map_deny_write_exec() mm: unconditionally close VMAs on error mm: avoid unsafe VMA hook invocation when error arises on mmap hook mm/thp: fix deferred split unqueue naming and locking mm/thp: fix deferred split queue not partially_mapped