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2018-10-29um: trap: fix spelling mistake, EACCESS -> EACCESColin Ian King1-1/+1
Trivial fix to a spelling mistake of the error access name EACCESS, rename to EACCES Signed-off-by: Colin Ian King <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2018-10-29um: NULL check before kfree is not neededYueHaibing1-2/+1
kfree(NULL) is safe,so this removes NULL check before freeing the mem Signed-off-by: YueHaibing <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2018-10-26um: switch to NO_BOOTMEMMike Rapoport1-11/+9
Replace bootmem initialization with memblock_add and memblock_reserve calls and explicit initialization of {min,max}_low_pfn. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport <[email protected]> Acked-by: Richard Weinberger <[email protected]> Cc: Guan Xuetao <[email protected]> Cc: Ley Foon Tan <[email protected]> Cc: Richard Kuo <[email protected]> Cc: Rob Herring <[email protected]> Cc: Michal Hocko <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-10-26um: setup_physmem: stop using global variablesMike Rapoport1-3/+3
The setup_physmem() function receives uml_physmem and uml_reserved as parameters and still used these global variables. Replace such usage with local variables. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport <[email protected]> Acked-by: Richard Weinberger <[email protected]> Cc: Guan Xuetao <[email protected]> Cc: Ley Foon Tan <[email protected]> Cc: Richard Kuo <[email protected]> Cc: Rob Herring <[email protected]> Cc: Michal Hocko <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-08-17mm: convert return type of handle_mm_fault() caller to vm_fault_tSouptick Joarder1-1/+1
Use new return type vm_fault_t for fault handler. For now, this is just documenting that the function returns a VM_FAULT value rather than an errno. Once all instances are converted, vm_fault_t will become a distinct type. Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t") In this patch all the caller of handle_mm_fault() are changed to return vm_fault_t type. Link: http://lkml.kernel.org/r/20180617084810.GA6730@jordon-HP-15-Notebook-PC Signed-off-by: Souptick Joarder <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Tony Luck <[email protected]> Cc: Matt Turner <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: Russell King <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Richard Kuo <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Michal Simek <[email protected]> Cc: James Hogan <[email protected]> Cc: Ley Foon Tan <[email protected]> Cc: Jonas Bonn <[email protected]> Cc: James E.J. Bottomley <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Yoshinori Sato <[email protected]> Cc: David S. Miller <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Guan Xuetao <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: "Levin, Alexander (Sasha Levin)" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-04-28signal/um: More carefully relay signals in relay_signal.Eric W. Biederman1-24/+14
There is a bug in relay signal. It assumes that when a signal is relayed the signal never uses a signal independent si_code, such as SI_USER, SI_KERNEL, SI_QUEUE, ... SI_SIGIO etc. In practice siginfo was assuming it was relaying a signal with the SIL_FAULT layout. As that is the common cases for the signals it supported that is a reasonable assumption. Further user mode linux must be very careful when relaying different kinds of signals to prevent an information leak. This means simply increasing the kinds of signals that are handled in relay_signal is non-trivial. Therefore use siginfo_layout and force_sig_fault to simplify the signal relaying in relay_signal. By taking advantage of the fact that user mode linux only works on x86 and x86_64 we can assume that si_trapno can be ignored, and that si_errno is always zero. For the signals SIGLL, SIGFPE, SIGSEGV, SIGBUS, and SIGTRAP the only fault handler I know of that sets si_errno is SIGTRAP TRAP_HWBKPT on a few oddball architectures. Those architectures have been modified to use force_sig_ptrace_errno_trap. Similarly only a few architectures set __ARCH_SI_TRAPNO. At the point uml supports those architectures again these additional cases can be examined and supported if desired in relay_signal. Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Anton Ivanov <[email protected]> Cc: Martin Pärtel <[email protected]> Cc: [email protected] Cc: [email protected] Fixes: d3c1cfcdb43e ("um: pass siginfo to guest process") Signed-off-by: "Eric W. Biederman" <[email protected]>
2018-04-25signal/um: Use force_sig_fault where appropriateEric W. Biederman2-28/+11
Filling in struct siginfo before calling force_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper force_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls force_sig_info. In short about a 5 line reduction in code for every time force_sig_info is called, which makes the calling function clearer. Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: "Eric W. Biederman" <[email protected]>
2018-04-25signal: Ensure every siginfo we send has all bits initializedEric W. Biederman1-0/+2
Call clear_siginfo to ensure every stack allocated siginfo is properly initialized before being passed to the signal sending functions. Note: It is not safe to depend on C initializers to initialize struct siginfo on the stack because C is allowed to skip holes when initializing a structure. The initialization of struct siginfo in tracehook_report_syscall_exit was moved from the helper user_single_step_siginfo into tracehook_report_syscall_exit itself, to make it clear that the local variable siginfo gets fully initialized. In a few cases the scope of struct siginfo has been reduced to make it clear that siginfo siginfo is not used on other paths in the function in which it is declared. Instances of using memset to initialize siginfo have been replaced with calls clear_siginfo for clarity. Signed-off-by: "Eric W. Biederman" <[email protected]>
2018-04-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/rw/umlLinus Torvalds2-166/+301
Pull UML updates from Richard Weinberger: - a new and faster epoll based IRQ controller and NIC driver - misc fixes and janitorial updates * git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: Fix vector raw inintialization logic Migrate vector timers to new timer API um: Compile with modern headers um: vector: Fix an error handling path in 'vector_parse()' um: vector: Fix a memory allocation check um: vector: fix missing unlock on error in vector_net_open() um: Add missing EXPORT for free_irq_by_fd() High Performance UML Vector Network Driver Epoll based IRQ controller um: Use POSIX ucontext_t instead of struct ucontext um: time: Use timespec64 for persistent clock um: Restore symbol versions for __memcpy and memcpy
2018-04-02mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff()Dominik Brodowski1-1/+1
Using this helper allows us to avoid the in-kernel calls to the sys_mmap_pgoff() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_mmap_pgoff(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/[email protected] Cc: Andrew Morton <[email protected]> Cc: [email protected] Signed-off-by: Dominik Brodowski <[email protected]>
2018-02-19um: Add missing EXPORT for free_irq_by_fd()Anton Ivanov1-0/+1
Fixes: ERROR: "free_irq_by_fd" [arch/um/drivers/random.ko] undefined! Signed-off-by: Anton Ivanov <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2018-02-19Epoll based IRQ controllerAnton Ivanov1-163/+297
1. Removes the need to walk the IRQ/Device list to determine who triggered the IRQ. 2. Improves scalability (up to several times performance improvement for cases with 10s of devices). 3. Improves UML baseline IO performance for one disk + one NIC use case by up to 10%. 4. Introduces write poll triggered IRQs. 5. Prerequisite for introducing high performance mmesg family of functions in network IO. 6. Fixes RNG shutdown which was leaking a file descriptor Signed-off-by: Anton Ivanov <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2018-02-19um: time: Use timespec64 for persistent clockArnd Bergmann1-3/+3
This read_persistent_clock() implementation is the only remaining caller of set_normalized_timespec(). Using read_persistent_clock64() and set_normalized_timespec64() instead lets us remove the deprecated interface in the future and helps make 32-bit arch/um get closer to working beyond 2038. Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2018-01-30Merge branch 'siginfo-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull siginfo cleanups from Eric Biederman: "Long ago when 2.4 was just a testing release copy_siginfo_to_user was made to copy individual fields to userspace, possibly for efficiency and to ensure initialized values were not copied to userspace. Unfortunately the design was complex, it's assumptions unstated, and humans are fallible and so while it worked much of the time that design failed to ensure unitialized memory is not copied to userspace. This set of changes is part of a new design to clean up siginfo and simplify things, and hopefully make the siginfo handling robust enough that a simple inspection of the code can be made to ensure we don't copy any unitializied fields to userspace. The design is to unify struct siginfo and struct compat_siginfo into a single definition that is shared between all architectures so that anyone adding to the set of information shared with struct siginfo can see the whole picture. Hopefully ensuring all future si_code assignments are arch independent. The design is to unify copy_siginfo_to_user32 and copy_siginfo_from_user32 so that those function are complete and cope with all of the different cases documented in signinfo_layout. I don't think there was a single implementation of either of those functions that was complete and correct before my changes unified them. The design is to introduce a series of helpers including force_siginfo_fault that take the values that are needed in struct siginfo and build the siginfo structure for their callers. Ensuring struct siginfo is built correctly. The remaining work for 4.17 (unless someone thinks it is post -rc1 material) is to push usage of those helpers down into the architectures so that architecture specific code will not need to deal with the fiddly work of intializing struct siginfo, and then when struct siginfo is guaranteed to be fully initialized change copy siginfo_to_user into a simple wrapper around copy_to_user. Further there is work in progress on the issues that have been documented requires arch specific knowledge to sort out. The changes below fix or at least document all of the issues that have been found with siginfo generation. Then proceed to unify struct siginfo the 32 bit helpers that copy siginfo to and from userspace, and generally clean up anything that is not arch specific with regards to siginfo generation. It is a lot but with the unification you can of siginfo you can already see the code reduction in the kernel" * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (45 commits) signal/memory-failure: Use force_sig_mceerr and send_sig_mceerr mm/memory_failure: Remove unused trapno from memory_failure signal/ptrace: Add force_sig_ptrace_errno_trap and use it where needed signal/powerpc: Remove unnecessary signal_code parameter of do_send_trap signal: Helpers for faults with specialized siginfo layouts signal: Add send_sig_fault and force_sig_fault signal: Replace memset(info,...) with clear_siginfo for clarity signal: Don't use structure initializers for struct siginfo signal/arm64: Better isolate the COMPAT_TASK portion of ptrace_hbptriggered ptrace: Use copy_siginfo in setsiginfo and getsiginfo signal: Unify and correct copy_siginfo_to_user32 signal: Remove the code to clear siginfo before calling copy_siginfo_from_user32 signal: Unify and correct copy_siginfo_from_user32 signal/blackfin: Remove pointless UID16_SIGINFO_COMPAT_NEEDED signal/blackfin: Move the blackfin specific si_codes to asm-generic/siginfo.h signal/tile: Move the tile specific si_codes to asm-generic/siginfo.h signal/frv: Move the frv specific si_codes to asm-generic/siginfo.h signal/ia64: Move the ia64 specific si_codes to asm-generic/siginfo.h signal/powerpc: Remove redefinition of NSIGTRAP on powerpc signal: Move addr_lsb into the _sigfault union for clarity ...
2018-01-22signal: Replace memset(info,...) with clear_siginfo for clarityEric W. Biederman1-1/+1
The function clear_siginfo is just a nice wrapper around memset so this results in no functional change. This change makes mistakes a little more difficult and it makes it clearer what is going on. Signed-off-by: "Eric W. Biederman" <[email protected]>
2018-01-09Construct init thread stack in the linker script rather than by unionDavid Howells3-4/+3
Construct the init thread stack in the linker script rather than doing it by means of a union so that ia64's init_task.c can be got rid of. The following symbols are then made available from INIT_TASK_DATA() linker script macro: init_thread_union init_stack INIT_TASK_DATA() also expands the region to THREAD_SIZE to accommodate the size of the init stack. init_thread_union is given its own section so that it can be placed into the stack space in the right order. I'm assuming that the ia64 ordering is correct and that the task_struct is first and the thread_info second. Signed-off-by: David Howells <[email protected]> Tested-by: Tony Luck <[email protected]> Tested-by: Will Deacon <[email protected]> (arm64) Tested-by: Palmer Dabbelt <[email protected]> Acked-by: Thomas Gleixner <[email protected]>
2017-12-19Do not hash userspace addresses in fault handlersKees Cook1-1/+1
The hashing of %p was designed to restrict kernel addresses. There is no reason to hash the userspace values seen during a segfault report, so switch these to %px. (Some architectures already use %lx.) Fixes: ad67b74d2469d9b8 ("printk: hash addresses printed with %p") Signed-off-by: Kees Cook <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-11-15mm, arch: remove empty_bad_page*Michal Hocko1-3/+0
empty_bad_page() and empty_bad_pte_table() seem to be relics from old days which is not used by any code for a long time. I have tried to find when exactly but this is not really all that straightforward due to many code movements - traces disappear around 2.4 times. Anyway no code really references neither empty_bad_page nor empty_bad_pte_table. We only allocate the storage which is not used by anybody so remove them. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Michal Hocko <[email protected]> Acked-by: Ralf Baechle <[email protected]> Acked-by: Ingo Molnar <[email protected]> Cc: Yoshinori Sato <[email protected]> Cc: David Howells <[email protected]> Cc: Rich Felker <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman3-0/+3
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <[email protected]> Reviewed-by: Philippe Ombredanne <[email protected]> Reviewed-by: Thomas Gleixner <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2017-09-29um/time: Fixup namespace collisionThomas Gleixner1-2/+2
The new timer_setup() function for struct timer_list collides with a private um function. Rename it. Fixes: 686fef928bba ("timer: Prepare to change timer callback argument type") Signed-off-by: Thomas Gleixner <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Jeff Dike <[email protected]> Cc: [email protected] Cc: Kees Cook <[email protected]>
2017-09-13um: Fix CONFIG_GCOV for modules.Thomas Meyer1-0/+7
Explicitly export symbols so modpost doesn't complain. Signed-off-by: Thomas Meyer <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2017-09-13um: Fix FP register size for XSTATE/XSAVEThomas Meyer1-2/+2
Hard code max size. Taken from https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gdb/common/x86-xstate.h Signed-off-by: Thomas Meyer <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2017-07-15Merge branch 'for-linus-4.13-rc1' of ↵Linus Torvalds4-14/+26
git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml Pull UML updates from Richard Weinberger: "Mostly fixes for UML: - First round of fixes for PTRACE_GETRESET/SETREGSET - A printf vs printk cleanup - Minor improvements" * 'for-linus-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: Correctly check for PTRACE_GETRESET/SETREGSET um: v2: Use generic NOTES macro um: Add kerneldoc for userspace_tramp() and start_userspace() um: Add kerneldoc for segv_handler um: stub-data.h: remove superfluous include um: userspace - be more verbose in ptrace set regs error um: add dummy ioremap and iounmap functions um: Allow building and running on older hosts um: Avoid longjmp/setjmp symbol clashes with libpthread.a um: console: Ignore console= option um: Use os_warn to print out pre-boot warning/error messages um: Add os_warn() for pre-boot warning/error messages um: Use os_info for the messages on normal path um: Add os_info() for pre-boot information messages um: Use printk instead of printf in make_uml_dir
2017-07-07um: Add kerneldoc for segv_handlerThomas Meyer1-0/+10
Signed-off-by: Thomas Meyer <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2017-07-06Merge branch 'uaccess.strlen' of ↵Linus Torvalds1-5/+0
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull user access str* updates from Al Viro: "uaccess str...() dead code removal" * 'uaccess.strlen' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: s390 keyboard.c: don't open-code strndup_user() mips: get rid of unused __strnlen_user() get rid of unused __strncpy_from_user() instances kill strlen_user()
2017-07-05um: Use os_warn to print out pre-boot warning/error messagesMasami Hiramatsu3-10/+12
Use os_warn() instead of printf/fprintf to print out pre-boot warning/error messages to stderr. Note that the help message and version message are kept to print out to stdout, because user explicitly specifies those options to get such information. Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2017-07-05um: Use os_info for the messages on normal pathMasami Hiramatsu1-4/+4
Use os_info() for printing out the messages on the normal execution path. Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2017-06-28arch: remove unused macro/function thread_saved_pc()Tobias Klauser1-6/+0
The only user of thread_saved_pc() in non-arch-specific code was removed in commit 8243d5597793 ("sched/core: Remove pointless printout in sched_show_task()"). Remove the implementations as well. Some architectures use thread_saved_pc() in their arch-specific code. Leave their thread_saved_pc() intact. Signed-off-by: Tobias Klauser <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-05-15kill strlen_user()Al Viro1-5/+0
no callers, no consistent semantics, no sane way to use it... Signed-off-by: Al Viro <[email protected]>
2017-05-13Merge branch 'for-linus-4.12-rc1' of ↵Linus Torvalds3-7/+9
git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml Pull UML fixes from Richard Weinberger: "No new stuff, just fixes" * 'for-linus-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: Add missing NR_CPUS include um: Fix to call read_initrd after init_bootmem um: Include kbuild.h instead of duplicating its macros um: Fix PTRACE_POKEUSER on x86_64 um: Set number of CPUs um: Fix _print_addr()
2017-05-03um: Fix to call read_initrd after init_bootmemMasami Hiramatsu2-3/+7
Since read_initrd() invokes alloc_bootmem() for allocating memory to load initrd image, it must be called after init_bootmem. This makes read_initrd() called directly from setup_arch() after init_bootmem() and mem_total_pages(). Cc: <[email protected]> Fixes: b63236972e1 ("um: Setup physical memory in setup_arch()") Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2017-05-03um: Fix _print_addr()Richard Weinberger1-4/+2
Recent changes to printk() broke UML's stack trace output. Kill the root of the problem by using a single printk() statement. Signed-off-by: Richard Weinberger <[email protected]>
2017-05-01Merge branch 'timers-core-for-linus' of ↵Linus Torvalds1-1/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: "The timer departement delivers: - more year 2038 rework - a massive rework of the arm achitected timer - preparatory patches to allow NTP correction of clock event devices to avoid early expiry - the usual pile of fixes and enhancements all over the place" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (91 commits) timer/sysclt: Restrict timer migration sysctl values to 0 and 1 arm64/arch_timer: Mark errata handlers as __maybe_unused Clocksource/mips-gic: Remove redundant non devicetree init MIPS/Malta: Probe gic-timer via devicetree clocksource: Use GENMASK_ULL in definition of CLOCKSOURCE_MASK acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver clocksource: arm_arch_timer: add GTDT support for memory-mapped timer acpi/arm64: Add memory-mapped timer support in GTDT driver clocksource: arm_arch_timer: simplify ACPI support code. acpi/arm64: Add GTDT table parse driver clocksource: arm_arch_timer: split MMIO timer probing. clocksource: arm_arch_timer: add structs to describe MMIO timer clocksource: arm_arch_timer: move arch_timer_needs_of_probing into DT init call clocksource: arm_arch_timer: refactor arch_timer_needs_probing clocksource: arm_arch_timer: split dt-only rate handling x86/uv/time: Set ->min_delta_ticks and ->max_delta_ticks unicore32/time: Set ->min_delta_ticks and ->max_delta_ticks um/time: Set ->min_delta_ticks and ->max_delta_ticks tile/time: Set ->min_delta_ticks and ->max_delta_ticks score/time: Set ->min_delta_ticks and ->max_delta_ticks ...
2017-04-14um/time: Set ->min_delta_ticks and ->max_delta_ticksNicolai Stange1-1/+3
In preparation for making the clockevents core NTP correction aware, all clockevent device drivers must set ->min_delta_ticks and ->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a clockevent device's rate is going to change dynamically and thus, the ratio of ns to ticks ceases to stay invariant. Make the uml arch's clockevent driver initialize these fields properly. This patch alone doesn't introduce any change in functionality as the clockevents core still looks exclusively at the (untouched) ->min_delta_ns and ->max_delta_ns. As soon as this has changed, a followup patch will purge the initialization of ->min_delta_ns and ->max_delta_ns from this driver. Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Daniel Lezcano <[email protected]> Cc: Richard Cochran <[email protected]> Cc: Prarit Bhargava <[email protected]> Cc: Stephen Boyd <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Jeff Dike <[email protected]> Cc: [email protected] Signed-off-by: Nicolai Stange <[email protected]> Signed-off-by: John Stultz <[email protected]>
2017-03-28um: switch to RAW_COPY_USERAl Viro1-4/+4
Signed-off-by: Al Viro <[email protected]>
2017-03-28new helper: uaccess_kernel()Al Viro1-5/+5
Signed-off-by: Al Viro <[email protected]>
2017-03-02sched/headers: Prepare to move kstack_end() from <linux/sched.h> to ↵Ingo Molnar1-0/+1
<linux/sched/task_stack.h> But first update the usage sites with the new header dependency. Acked-by: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-02sched/headers: Prepare to move 'init_task' and 'init_thread_union' from ↵Ingo Molnar2-0/+3
<linux/sched.h> to <linux/sched/task.h> Update all usage sites first. Acked-by: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-02sched/headers: Prepare to remove the <linux/mm_types.h> dependency from ↵Ingo Molnar3-2/+4
<linux/sched.h> Update code that relied on sched.h including various MM types for them. This will allow us to remove the <linux/mm_types.h> include from <linux/sched.h>. Acked-by: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-02sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar3-0/+3
<linux/sched/task_stack.h> We are going to split <linux/sched/task_stack.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/task_stack.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-02sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar3-0/+3
<linux/sched/task.h> We are going to split <linux/sched/task.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/task.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-02sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar3-0/+4
<linux/sched/debug.h> We are going to split <linux/sched/debug.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/debug.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-02sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar4-4/+6
<linux/sched/signal.h> We are going to split <linux/sched/signal.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/signal.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2016-12-25clocksource: Use a plain u64 instead of cycle_tThomas Gleixner1-1/+1
There is no point in having an extra type for extra confusion. u64 is unambiguous. Conversion was done with the following coccinelle script: @rem@ @@ -typedef u64 cycle_t; @fix@ typedef cycle_t; @@ -cycle_t +u64 Signed-off-by: Thomas Gleixner <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: John Stultz <[email protected]>
2016-12-24Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds5-5/+5
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-10-07nmi_backtrace: generate one-line reports for idle cpusChris Metcalf2-0/+2
When doing an nmi backtrace of many cores, most of which are idle, the output is a little overwhelming and very uninformative. Suppress messages for cpus that are idling when they are interrupted and just emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN". We do this by grouping all the cpuidle code together into a new .cpuidle.text section, and then checking the address of the interrupted PC to see if it lies within that section. This commit suitably tags x86 and tile idle routines, and only adds in the minimal framework for other architectures. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Chris Metcalf <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Tested-by: Peter Zijlstra (Intel) <[email protected]> Tested-by: Daniel Thompson <[email protected]> [arm] Tested-by: Petr Mladek <[email protected]> Cc: Aaron Tomlin <[email protected]> Cc: Peter Zijlstra (Intel) <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Russell King <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-09-07um/ptrace: Fix the syscall number update after a ptraceMickaël Salaün1-5/+0
Update the syscall number after each PTRACE_SETREGS on ORIG_*AX. This is needed to get the potentially altered syscall number in the seccomp filters after RET_TRACE. This fix four seccomp_bpf tests: > [ RUN ] TRACE_syscall.skip_after_RET_TRACE > seccomp_bpf.c:1560:TRACE_syscall.skip_after_RET_TRACE:Expected -1 (18446744073709551615) == syscall(39) (26) > seccomp_bpf.c:1561:TRACE_syscall.skip_after_RET_TRACE:Expected 1 (1) == (*__errno_location ()) (22) > [ FAIL ] TRACE_syscall.skip_after_RET_TRACE > [ RUN ] TRACE_syscall.kill_after_RET_TRACE > TRACE_syscall.kill_after_RET_TRACE: Test exited normally instead of by signal (code: 1) > [ FAIL ] TRACE_syscall.kill_after_RET_TRACE > [ RUN ] TRACE_syscall.skip_after_ptrace > seccomp_bpf.c:1622:TRACE_syscall.skip_after_ptrace:Expected -1 (18446744073709551615) == syscall(39) (26) > seccomp_bpf.c:1623:TRACE_syscall.skip_after_ptrace:Expected 1 (1) == (*__errno_location ()) (22) > [ FAIL ] TRACE_syscall.skip_after_ptrace > [ RUN ] TRACE_syscall.kill_after_ptrace > TRACE_syscall.kill_after_ptrace: Test exited normally instead of by signal (code: 1) > [ FAIL ] TRACE_syscall.kill_after_ptrace Fixes: 26703c636c1f ("um/ptrace: run seccomp after ptrace") Signed-off-by: Mickaël Salaün <[email protected]> Acked-by: Kees Cook <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: James Morris <[email protected]> Cc: [email protected] Signed-off-by: James Morris <[email protected]> Signed-off-by: Kees Cook <[email protected]>
2016-09-07um/ptrace: Fix the syscall_trace_leave callMickaël Salaün1-2/+3
Keep the same semantic as before the commit 26703c636c1f: deallocate audit context and fake a proper syscall exit. This fix a kernel panic triggered by the seccomp_bpf test: > [ RUN ] global.ERRNO_valid > BUG: failure at kernel/auditsc.c:1504/__audit_syscall_entry()! > Kernel panic - not syncing: BUG! Fixes: 26703c636c1f ("um/ptrace: run seccomp after ptrace") Signed-off-by: Mickaël Salaün <[email protected]> Acked-by: Kees Cook <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: James Morris <[email protected]> Cc: [email protected] Signed-off-by: James Morris <[email protected]> Signed-off-by: Kees Cook <[email protected]>
2016-08-04Merge branch 'for-linus-4.8-rc1' of ↵Linus Torvalds3-6/+9
git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml Pull UML updates from Richard Weinberger: "Beside of various fixes this also contains patches to enable features such was Kcov, kmemleak and TRACE_IRQFLAGS_SUPPORT on UML" * 'for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common() um: Support kcov um: Enable TRACE_IRQFLAGS_SUPPORT um: Use asm-generic/irqflags.h um: Fix possible deadlock in sig_handler_common() um: Select HAVE_DEBUG_KMEMLEAK um: Setup physical memory in setup_arch() um: Eliminate null test after alloc_bootmem
2016-08-04um: Support kcovVegard Nossum1-0/+5
This adds support for kcov to UML. There is a small problem where UML will randomly segfault during boot; this is because current_thread_info() occasionally returns an invalid (non-NULL) pointer and we try to dereference it in __sanitizer_cov_trace_pc(). I consider this a bug in UML itself and this patch merely exposes it. [v2: disable instrumentation in UML-specific code] Cc: Quentin Casasnovas <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Thomas Meyer <[email protected]> Cc: user-mode-linux-devel <[email protected]> Cc: Dmitry Vyukov <[email protected]> Signed-off-by: Vegard Nossum <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>