5147da902e
Pull exit cleanups from Eric Biederman: "While looking at some issues related to the exit path in the kernel I found several instances where the code is not using the existing abstractions properly. This set of changes introduces force_fatal_sig a way of sending a signal and not allowing it to be caught, and corrects the misuse of the existing abstractions that I found. A lot of the misuse of the existing abstractions are silly things such as doing something after calling a no return function, rolling BUG by hand, doing more work than necessary to terminate a kernel thread, or calling do_exit(SIGKILL) instead of calling force_sig(SIGKILL). In the review a deficiency in force_fatal_sig and force_sig_seccomp where ptrace or sigaction could prevent the delivery of the signal was found. I have added a change that adds SA_IMMUTABLE to change that makes it impossible to interrupt the delivery of those signals, and allows backporting to fix force_sig_seccomp And Arnd found an issue where a function passed to kthread_run had the wrong prototype, and after my cleanup was failing to build." * 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (23 commits) soc: ti: fix wkup_m3_rproc_boot_thread return type signal: Add SA_IMMUTABLE to ensure forced siganls do not get changed signal: Replace force_sigsegv(SIGSEGV) with force_fatal_sig(SIGSEGV) exit/r8188eu: Replace the macro thread_exit with a simple return 0 exit/rtl8712: Replace the macro thread_exit with a simple return 0 exit/rtl8723bs: Replace the macro thread_exit with a simple return 0 signal/x86: In emulate_vsyscall force a signal instead of calling do_exit signal/sparc32: In setup_rt_frame and setup_fram use force_fatal_sig signal/sparc32: Exit with a fatal signal when try_to_clear_window_buffer fails exit/syscall_user_dispatch: Send ordinary signals on failure signal: Implement force_fatal_sig exit/kthread: Have kernel threads return instead of calling do_exit signal/s390: Use force_sigsegv in default_trap_handler signal/vm86_32: Properly send SIGSEGV when the vm86 state cannot be saved. signal/vm86_32: Replace open coded BUG_ON with an actual BUG_ON signal/sparc: In setup_tsb_params convert open coded BUG into BUG signal/powerpc: On swapcontext failure force SIGSEGV signal/sh: Use force_sig(SIGKILL) instead of do_group_exit(SIGKILL) signal/mips: Update (_save|_restore)_fp_context to fail with -EFAULT signal/sparc32: Remove unreachable do_exit in do_sparc_fault ... |
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.. | ||
cpu | ||
syscalls | ||
vsyscall | ||
.gitignore | ||
asm-offsets.c | ||
crash_dump.c | ||
debugtraps.S | ||
disassemble.c | ||
dma-coherent.c | ||
dumpstack.c | ||
dwarf.c | ||
entry-common.S | ||
ftrace.c | ||
head_32.S | ||
hw_breakpoint.c | ||
idle.c | ||
io_trapped.c | ||
io.c | ||
iomap.c | ||
ioport.c | ||
irq_32.c | ||
irq.c | ||
kdebugfs.c | ||
kgdb.c | ||
kprobes.c | ||
machine_kexec.c | ||
machvec.c | ||
Makefile | ||
module.c | ||
nmi_debug.c | ||
perf_callchain.c | ||
perf_event.c | ||
process_32.c | ||
process.c | ||
ptrace_32.c | ||
ptrace.c | ||
reboot.c | ||
relocate_kernel.S | ||
return_address.c | ||
setup.c | ||
sh_bios.c | ||
sh_ksyms_32.c | ||
signal_32.c | ||
smp.c | ||
stacktrace.c | ||
swsusp.c | ||
sys_sh32.c | ||
sys_sh.c | ||
syscalls_32.S | ||
time.c | ||
topology.c | ||
traps_32.c | ||
traps.c | ||
unwinder.c | ||
vmlinux.lds.S |