The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 30766f1105d6d2459c3b9fe34a3e52b637a72950 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024070128-hermit-trash-cc15@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^..
Possible dependencies:
30766f1105d6 ("sh: rework sync_file_range ABI") b41c51c8e194 ("arch: add pkey and rseq syscall numbers everywhere") 0d6040d46817 ("arch: add split IPC system calls where needed") d25a122afd43 ("sh: add statx system call") 09ac12603bf0 ("m68k: assign syscall number for seccomp") d012d1325ba5 ("alpha: wire up io_pgetevents system call") acce2f71779c ("ia64: assign syscall numbers for perf and seccomp") 7349ee3a97ed ("ia64: add statx and io_pgetevents syscalls") 90856087daca ("s390: remove compat_wrapper.c") aa0d6e70d3b3 ("s390: autogenerate compat syscall wrappers") fef747bab3c0 ("s390: use generic UID16 implementation") d9a7fa67b4bf ("Merge branch 'next-seccomp' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 30766f1105d6d2459c3b9fe34a3e52b637a72950 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann arnd@arndb.de Date: Tue, 11 Jun 2024 22:12:43 +0200 Subject: [PATCH] sh: rework sync_file_range ABI
The unusual function calling conventions on SuperH ended up causing sync_file_range to have the wrong argument order, with the 'flags' argument getting sorted before 'nbytes' by the compiler.
In userspace, I found that musl, glibc, uclibc and strace all expect the normal calling conventions with 'nbytes' last, so changing the kernel to match them should make all of those work.
In order to be able to also fix libc implementations to work with existing kernels, they need to be able to tell which ABI is used. An easy way to do this is to add yet another system call using the sync_file_range2 ABI that works the same on all architectures.
Old user binaries can now work on new kernels, and new binaries can try the new sync_file_range2() to work with new kernels or fall back to the old sync_file_range() version if that doesn't exist.
Cc: stable@vger.kernel.org Fixes: 75c92acdd5b1 ("sh: Wire up new syscalls.") Acked-by: John Paul Adrian Glaubitz glaubitz@physik.fu-berlin.de Signed-off-by: Arnd Bergmann arnd@arndb.de
diff --git a/arch/sh/kernel/sys_sh32.c b/arch/sh/kernel/sys_sh32.c index 9dca568509a5..d6f4afcb0e87 100644 --- a/arch/sh/kernel/sys_sh32.c +++ b/arch/sh/kernel/sys_sh32.c @@ -59,3 +59,14 @@ asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1, (u64)len0 << 32 | len1, advice); #endif } + +/* + * swap the arguments the way that libc wants them instead of + * moving flags ahead of the 64-bit nbytes argument + */ +SYSCALL_DEFINE6(sh_sync_file_range6, int, fd, SC_ARG64(offset), + SC_ARG64(nbytes), unsigned int, flags) +{ + return ksys_sync_file_range(fd, SC_VAL64(loff_t, offset), + SC_VAL64(loff_t, nbytes), flags); +} diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl index bbf83a2db986..c55fd7696d40 100644 --- a/arch/sh/kernel/syscalls/syscall.tbl +++ b/arch/sh/kernel/syscalls/syscall.tbl @@ -321,7 +321,7 @@ 311 common set_robust_list sys_set_robust_list 312 common get_robust_list sys_get_robust_list 313 common splice sys_splice -314 common sync_file_range sys_sync_file_range +314 common sync_file_range sys_sh_sync_file_range6 315 common tee sys_tee 316 common vmsplice sys_vmsplice 317 common move_pages sys_move_pages @@ -395,6 +395,7 @@ 385 common pkey_alloc sys_pkey_alloc 386 common pkey_free sys_pkey_free 387 common rseq sys_rseq +388 common sync_file_range2 sys_sync_file_range2 # room for arch specific syscalls 393 common semget sys_semget 394 common semctl sys_semctl