kernel/linux.git/arch/x86/entry/syscalls, branch v5.15.208

syscalls: fix compat_sys_io_pgetevents_time64 usage

2024-07-05T07:14:50+00:00

commit d3882564a77c21eb746ba5364f3fa89b88de3d61 upstream. Using sys_io_pgetevents() as the entry point for compat mode tasks works almost correctly, but misses the sign extension for the min_nr and nr arguments. This was addressed on parisc by switching to compat_sys_io_pgetevents_time64() in commit 6431e92fc827 ("parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode"), as well as by using more sophisticated system call wrappers on x86 and s390. However, arm64, mips, powerpc, sparc and riscv still have the same bug. Change all of them over to use compat_sys_io_pgetevents_time64() like parisc already does. This was clearly the intention when the function was originally added, but it got hooked up incorrectly in the tables. Cc: stable@vger.kernel.org Fixes: 48166e6ea47d ("y2038: add 64-bit time_t syscalls to all 32-bit architectures") Acked-by: Heiko Carstens # s390 Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman

compat: remove some compat entry points

2021-09-08T22:32:35+00:00

These are all handled correctly when calling the native system call entry point, so remove the special cases. Link: https://lkml.kernel.org/r/20210727144859.4150043-6-arnd@kernel.org Signed-off-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Cc: Al Viro Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christoph Hellwig Cc: "David S. Miller" Cc: Eric Biederman Cc: Feng Tang Cc: Heiko Carstens Cc: Helge Deller Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: "James E.J. Bottomley" Cc: Michael Ellerman Cc: Paul Mackerras Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'akpm' (patches from Andrew)

2021-09-03T17:08:28+00:00

Merge misc updates from Andrew Morton: "173 patches. Subsystems affected by this series: ia64, ocfs2, block, and mm (debug, pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap, bootmem, sparsemem, vmalloc, kasan, pagealloc, memory-failure, hugetlb, userfaultfd, vmscan, compaction, mempolicy, memblock, oom-kill, migration, ksm, percpu, vmstat, and madvise)" * emailed patches from Andrew Morton : (173 commits) mm/madvise: add MADV_WILLNEED to process_madvise() mm/vmstat: remove unneeded return value mm/vmstat: simplify the array size calculation mm/vmstat: correct some wrong comments mm/percpu,c: remove obsolete comments of pcpu_chunk_populated() selftests: vm: add COW time test for KSM pages selftests: vm: add KSM merging time test mm: KSM: fix data type selftests: vm: add KSM merging across nodes test selftests: vm: add KSM zero page merging test selftests: vm: add KSM unmerge test selftests: vm: add KSM merge test mm/migrate: correct kernel-doc notation mm: wire up syscall process_mrelease mm: introduce process_mrelease system call memblock: make memblock_find_in_range method private mm/mempolicy.c: use in_task() in mempolicy_slab_node() mm/mempolicy: unify the create() func for bind/interleave/prefer-many policies mm/mempolicy: advertise new MPOL_PREFERRED_MANY mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY ...

mm: wire up syscall process_mrelease

2021-09-03T16:58:17+00:00

Split off from prev patch in the series that implements the syscall. Link: https://lkml.kernel.org/r/20210809185259.405936-2-surenb@google.com Signed-off-by: Suren Baghdasaryan Acked-by: Geert Uytterhoeven Cc: Andy Lutomirski Cc: Christian Brauner Cc: Christoph Hellwig Cc: David Hildenbrand Cc: David Rientjes Cc: Florian Weimer Cc: Jan Engelhardt Cc: Jann Horn Cc: Johannes Weiner Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Minchan Kim Cc: Oleg Nesterov Cc: Rik van Riel Cc: Roman Gushchin Cc: Shakeel Butt Cc: Tim Murray Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

exit/bdflush: Remove the deprecated bdflush system call

2021-07-12T20:17:47+00:00

The bdflush system call has been deprecated for a very long time. Recently Michael Schmitz tested[1] and found that the last known caller of of the bdflush system call is unaffected by it's removal. Since the code is not needed delete it. [1] https://lkml.kernel.org/r/36123b5d-daa0-6c2b-f2d4-a942f069fd54@gmail.com Link: https://lkml.kernel.org/r/87sg10quue.fsf_-_@disp2133 Tested-by: Michael Schmitz Acked-by: Geert Uytterhoeven Reviewed-by: Arnd Bergmann Acked-by: Cyril Hrubis Signed-off-by: "Eric W. Biederman"

arch, mm: wire up memfd_secret system call where relevant

2021-07-08T18:48:21+00:00

Wire up memfd_secret system call on architectures that define ARCH_HAS_SET_DIRECT_MAP, namely arm64, risc-v and x86. Link: https://lkml.kernel.org/r/20210518072034.31572-7-rppt@kernel.org Signed-off-by: Mike Rapoport Acked-by: Palmer Dabbelt Acked-by: Arnd Bergmann Acked-by: Catalin Marinas Acked-by: David Hildenbrand Acked-by: James Bottomley Cc: Alexander Viro Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Christopher Lameter Cc: Dan Williams Cc: Dave Hansen Cc: David Hildenbrand Cc: Elena Reshetova Cc: Hagen Paul Pfeifer Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: James Bottomley Cc: "Kirill A. Shutemov" Cc: Mark Rutland Cc: Matthew Wilcox Cc: Michael Kerrisk Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Rick Edgecombe Cc: Roman Gushchin Cc: Shakeel Butt Cc: Shuah Khan Cc: Thomas Gleixner Cc: Tycho Andersen Cc: Will Deacon Cc: kernel test robot Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge tag 'fs_for_v5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2021-07-01T19:06:39+00:00

Pull misc fs updates from Jan Kara: "The new quotactl_fd() syscall (remake of quotactl_path() syscall that got introduced & disabled in 5.13 cycle), and couple of udf, reiserfs, isofs, and writeback fixes and cleanups" * tag 'fs_for_v5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: writeback: fix obtain a reference to a freeing memcg css quota: remove unnecessary oom message isofs: remove redundant continue statement quota: Wire up quotactl_fd syscall quota: Change quotactl_path() systcall to an fd-based one reiserfs: Remove unneed check in reiserfs_write_full_page() udf: Fix NULL pointer dereference in udf_symlink function reiserfs: add check for invalid 1st journal block

Merge tag 'x86-entry-2021-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2021-06-29T19:44:51+00:00

Pull x86 entry code related updates from Thomas Gleixner: - Consolidate the macros for .byte ... opcode sequences - Deduplicate register offset defines in include files - Simplify the ia32,x32 compat handling of the related syscall tables to get rid of #ifdeffery. - Clear all EFLAGS which are not required for syscall handling - Consolidate the syscall tables and switch the generation over to the generic shell script and remove the CFLAGS tweaks which are not longer required. - Use 'int' type for system call numbers to match the generic code. - Add more selftests for syscalls * tag 'x86-entry-2021-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/syscalls: Don't adjust CFLAGS for syscall tables x86/syscalls: Remove -Wno-override-init for syscall tables x86/uml/syscalls: Remove array index from syscall initializers x86/syscalls: Clear 'offset' and 'prefix' in case they are set in env x86/entry: Use int everywhere for system call numbers x86/entry: Treat out of range and gap system calls the same x86/entry/64: Sign-extend system calls on entry to int selftests/x86/syscall: Add tests under ptrace to syscall_numbering_64 selftests/x86/syscall: Simplify message reporting in syscall_numbering selftests/x86/syscall: Update and extend syscall_numbering_64 x86/syscalls: Switch to generic syscallhdr.sh x86/syscalls: Use __NR_syscalls instead of __NR_syscall_max x86/unistd: Define X32_NR_syscalls only for 64-bit kernel x86/syscalls: Stop filling syscall arrays with *_sys_ni_syscall x86/syscalls: Switch to generic syscalltbl.sh x86/entry/x32: Rename __x32_compat_sys_* to __x64_compat_sys_*

quota: Wire up quotactl_fd syscall

2021-06-07T10:11:24+00:00

Wire up the quotactl_fd syscall. Reviewed-by: Christoph Hellwig Signed-off-by: Jan Kara

x86/syscalls: Clear 'offset' and 'prefix' in case they are set in env

2021-05-25T14:59:23+00:00

If the environment variable 'prefix' is set on the build host, it is wrongly used as syscall macro prefixes. $ export prefix=/usr $ make -s defconfig all In file included from ./arch/x86/include/asm/unistd.h:20, from :2: ./arch/x86/include/generated/uapi/asm/unistd_64.h:4:9: warning: missing whitespace after the macro name 4 | #define __NR_/usrread 0 | ^~~~~ arch/x86/entry/syscalls/Makefile should clear 'offset' and 'prefix'. Fixes: 3cba325b358f ("x86/syscalls: Switch to generic syscallhdr.sh") Reported-by: Naresh Kamboju Signed-off-by: Masahiro Yamada Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/r/20210525115420.679416-1-masahiroy@kernel.org