The patch titled Subject: mm/vmpressure.c: fix race in vmpressure_work_fn() has been removed from the -mm tree. Its filename was mm-vmpressurec-fix-race-in-vmpressure_work_fn.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Subject: mm/vmpressure.c: fix race in vmpressure_work_fn() In some android devices, there will be a "divide by zero" exception. vmpr->scanned could be zero before spin_lock(&vmpr->sr_lock). Addresses https://bugzilla.kernel.org/show_bug.cgi?id=88051 [akpm@xxxxxxxxxxxxxxxxxxxx: neaten] Reported-by: ji_ang <ji_ang@xxxxxxx> Cc: Anton Vorontsov <anton.vorontsov@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/vmpressure.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff -puN mm/vmpressure.c~mm-vmpressurec-fix-race-in-vmpressure_work_fn mm/vmpressure.c --- a/mm/vmpressure.c~mm-vmpressurec-fix-race-in-vmpressure_work_fn +++ a/mm/vmpressure.c @@ -165,6 +165,7 @@ static void vmpressure_work_fn(struct wo unsigned long scanned; unsigned long reclaimed; + spin_lock(&vmpr->sr_lock); /* * Several contexts might be calling vmpressure(), so it is * possible that the work was rescheduled again before the old @@ -173,11 +174,12 @@ static void vmpressure_work_fn(struct wo * here. No need for any locks here since we don't care if * vmpr->reclaimed is in sync. */ - if (!vmpr->scanned) + scanned = vmpr->scanned; + if (!scanned) { + spin_unlock(&vmpr->sr_lock); return; + } - spin_lock(&vmpr->sr_lock); - scanned = vmpr->scanned; reclaimed = vmpr->reclaimed; vmpr->scanned = 0; vmpr->reclaimed = 0; _ Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are origin.patch i-need-old-gcc.patch arch-alpha-kernel-systblss-remove-debug-check.patch input-route-kbd-leds-through-the-generic-leds-layer.patch o2dlm-fix-null-pointer-dereference-in-o2dlm_blocking_ast_wrapper-checkpatch-fixes.patch ocfs2-free-inode-when-i_count-becomes-zero.patch ocfs2-add-functions-to-add-and-remove-inode-in-orphan-dir-fix.patch mm.patch slab-improve-checking-for-invalid-gfp_flags.patch mm-memcontrol-lockless-page-counters-fix.patch mm-memcontrol-lockless-page-counters-fix-fix.patch kernel-res_counter-remove-the-unused-api-fix.patch mm-compaction-simplify-deferred-compaction-fix.patch mm-compaction-always-update-cached-scanner-positions-fix-checkpatch-fixes.patch mm-memcontrol-remove-unnecessary-pcg_used-pc-mem_cgroup-valid-flag-fix.patch mm-memcontrol-fold-mem_cgroup_start_move-mem_cgroup_end_move-fix.patch mm-fix-huge-zero-page-accounting-in-smaps-report-fix-2-fix.patch mm-page_allocc-__alloc_pages_nodemask-dont-alter-arg-gfp_mask.patch mm-mincore-add-hwpoison-page-handle-checkpatch-fixes.patch include-linux-kmemleakh-needs-slabh.patch x86-add-pmd_-for-thp-fix.patch sparc-add-pmd_-for-thp-fix.patch mm-page_owner-keep-track-of-page-owners.patch fs-seq_file-fallback-to-vmalloc-instead-of-oom-kill-processes-fix.patch mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch zsmalloc-fix-zs_init-cpu-notifier-error-handling-fix-2.patch zsmalloc-fix-zs_init-cpu-notifier-error-handling-fix.patch mm-zsmalloc-support-allocating-obj-with-size-of-zs_max_alloc_size-fix.patch mm-zsmalloc-avoid-duplicate-assignment-of-prev_class-fix.patch do_shared_fault-check-that-mmap_sem-is-held.patch fs-proc-use-a-rb-tree-for-the-directory-entries-fix.patch fs-binfmt_miscc-use-gfp_kernel-instead-of-gfp_user.patch init-allow-config_init_fallback=n-to-disable-defaults-if-init=-fails-checkpatch-fixes.patch rtc-omap-add-support-for-pmic_power_en-v3-fix.patch drivers-rtc-rtc-sirfsocc-add-alarm_irq_enable-support-fix.patch rtc-ds1374-add-watchdog-support-checkpatch-fixes.patch exit-wait-cleanup-the-ptrace_reparented-checks-fix.patch sysctl-terminate-strings-also-on-r-fix.patch ipc-semc-chance-memory-barrier-in-sem_lock-to-smp_rmb-fix.patch ipc-semc-chance-memory-barrier-in-sem_lock-to-smp_rmb-fix-fix.patch ipc-msg-increase-msgmni-remove-scaling-checkpatch-fixes.patch linux-next.patch linux-next-rejects.patch drivers-gpio-gpio-zevioc-fix-build.patch mm-cma-make-kmemleak-ignore-cma-regions.patch lib-show_mem-this-patch-adds-cma-reserved-infromation-fix.patch tools-testing-selftests-makefile-alphasort-the-targets-list.patch mm-replace-remap_file_pages-syscall-with-emulation.patch journal_add_journal_head-debug.patch journal_add_journal_head-debug-fix.patch kernel-forkc-export-kernel_thread-to-modules.patch mutex-subsystem-synchro-test-module.patch slab-leaks3-default-y.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html