From: ebiederm@xmission.com (Eric W. Biederman)
To: <linux-kernel@vger.kernel.org>
Cc: <linux-arch@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Alexey Gladkov <legion@kernel.org>, Kyle Huey <me@kylehuey.com>,
Oleg Nesterov <oleg@redhat.com>,
Kees Cook <keescook@chromium.org>,
Al Viro <viro@ZenIV.linux.org.uk>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: [PATCH 00/10] Removal of most do_exit calls
Date: Wed, 08 Dec 2021 14:17:22 -0600 [thread overview]
Message-ID: <87a6ha4zsd.fsf@email.froward.int.ebiederm.org> (raw)
We have a lot of calls to do_exit that really don't want the semantics
of userspace calling pthread_exit, aka exit(2). Instead the interesting
semantics are those of the current task exiting.
This set of changes removes a dead reference to do_exit on s390,
adds a function make_task_dead and changes all of the oops
implementations to use it, and adds function kthread_exit and
changes all of the kthread exits to use it.
The short term win of this set of changes is being able to move many
sanity checks out of do_exit that are only really interesting during an
oops. Making it easier to see what do_exit is actually doing.
After this set of changes the number there are only about a big screen
full of do_exit calls left. Making future changes much easier to
review.
s390 folks. Can you please verify I read the s390 code correctly when
observing the reference to do_exit really is dead? I would really
appreciate it. I am not very familiar with s390.
This is on top of:
https://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git/ signal-for-v5.17
It is my plan that after these changes are reviewed to apply these
changes into my signal-for-v5.17 branch. After that I can get to
cleaning up where signals, coredumps and the exit code meets.
Eric W. Biederman (10):
exit/s390: Remove dead reference to do_exit from copy_thread
exit: Add and use make_task_dead.
exit: Move oops specific logic from do_exit into make_task_dead
exit: Stop poorly open coding do_task_dead in make_task_dead
exit: Stop exporting do_exit
exit: Implement kthread_exit
exit: Rename module_put_and_exit to module_put_and_kthread_exit
exit: Rename complete_and_exit to kthread_complete_and_exit
kthread: Ensure struct kthread is present for all kthreads
exit/kthread: Move the exit code for kernel threads into struct kthread
arch/alpha/kernel/traps.c | 6 +-
arch/alpha/mm/fault.c | 2 +-
arch/arm/kernel/traps.c | 2 +-
arch/arm/mm/fault.c | 2 +-
arch/arm64/kernel/traps.c | 2 +-
arch/arm64/mm/fault.c | 2 +-
arch/csky/abiv1/alignment.c | 2 +-
arch/csky/kernel/traps.c | 2 +-
arch/csky/mm/fault.c | 2 +-
arch/h8300/kernel/traps.c | 2 +-
arch/h8300/mm/fault.c | 2 +-
arch/hexagon/kernel/traps.c | 2 +-
arch/ia64/kernel/mca_drv.c | 2 +-
arch/ia64/kernel/traps.c | 2 +-
arch/ia64/mm/fault.c | 2 +-
arch/m68k/kernel/traps.c | 2 +-
arch/m68k/mm/fault.c | 2 +-
arch/microblaze/kernel/exceptions.c | 4 +-
arch/mips/kernel/traps.c | 2 +-
arch/nds32/kernel/fpu.c | 2 +-
arch/nds32/kernel/traps.c | 8 +--
arch/nios2/kernel/traps.c | 4 +-
arch/openrisc/kernel/traps.c | 2 +-
arch/parisc/kernel/traps.c | 2 +-
arch/powerpc/kernel/traps.c | 8 +--
arch/riscv/kernel/traps.c | 2 +-
arch/riscv/mm/fault.c | 2 +-
arch/s390/kernel/dumpstack.c | 2 +-
arch/s390/kernel/nmi.c | 2 +-
arch/s390/kernel/process.c | 1 -
arch/sh/kernel/traps.c | 2 +-
arch/sparc/kernel/traps_32.c | 4 +-
arch/sparc/kernel/traps_64.c | 4 +-
arch/x86/entry/entry_32.S | 6 +-
arch/x86/entry/entry_64.S | 6 +-
arch/x86/kernel/dumpstack.c | 4 +-
arch/xtensa/kernel/traps.c | 2 +-
crypto/algboss.c | 4 +-
drivers/net/wireless/rsi/rsi_91x_coex.c | 2 +-
drivers/net/wireless/rsi/rsi_91x_main.c | 2 +-
drivers/net/wireless/rsi/rsi_91x_sdio_ops.c | 2 +-
drivers/net/wireless/rsi/rsi_91x_usb_ops.c | 2 +-
drivers/pnp/pnpbios/core.c | 6 +-
drivers/staging/rts5208/rtsx.c | 16 ++---
drivers/usb/atm/usbatm.c | 2 +-
drivers/usb/gadget/function/f_mass_storage.c | 2 +-
fs/cifs/connect.c | 2 +-
fs/exec.c | 2 +
fs/jffs2/background.c | 2 +-
fs/nfs/callback.c | 4 +-
fs/nfs/nfs4state.c | 2 +-
fs/nfsd/nfssvc.c | 2 +-
include/linux/kernel.h | 1 -
include/linux/kthread.h | 4 +-
include/linux/module.h | 6 +-
include/linux/sched/task.h | 1 +
kernel/exit.c | 88 ++++++++++++++--------------
kernel/fork.c | 4 ++
kernel/futex/core.c | 2 +-
kernel/kexec_core.c | 2 +-
kernel/kthread.c | 78 +++++++++++++++++-------
kernel/module.c | 6 +-
kernel/sched/core.c | 16 ++---
lib/kunit/try-catch.c | 4 +-
net/bluetooth/bnep/core.c | 2 +-
net/bluetooth/cmtp/core.c | 2 +-
net/bluetooth/hidp/core.c | 2 +-
tools/objtool/check.c | 8 ++-
68 files changed, 212 insertions(+), 173 deletions(-)
Eric
next reply other threads:[~2021-12-08 20:18 UTC|newest]
Thread overview: 137+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-08 20:17 Eric W. Biederman [this message]
2021-12-08 20:25 ` [PATCH 01/10] exit/s390: Remove dead reference to do_exit from copy_thread Eric W. Biederman
2021-12-12 17:48 ` Heiko Carstens
2021-12-13 14:50 ` Eric W. Biederman
2022-01-05 4:25 ` Al Viro
2021-12-08 20:25 ` [PATCH 02/10] exit: Add and use make_task_dead Eric W. Biederman
2022-01-05 5:01 ` Al Viro
2022-01-05 20:46 ` Eric W. Biederman
2022-01-05 21:53 ` Al Viro
2022-01-05 22:51 ` Linus Torvalds
2022-01-05 23:34 ` Al Viro
2021-12-08 20:25 ` [PATCH 03/10] exit: Move oops specific logic from do_exit into make_task_dead Eric W. Biederman
2022-01-05 5:48 ` Al Viro
2022-01-06 7:08 ` Al Viro
2022-01-07 3:42 ` Al Viro
2022-01-07 19:02 ` Eric W. Biederman
2022-01-07 18:59 ` Eric W. Biederman
2022-01-17 8:05 ` Christoph Hellwig
2022-01-17 12:15 ` Heiko Carstens
2022-01-17 13:17 ` Christoph Hellwig
2022-01-17 13:24 ` Arnd Bergmann
2022-01-17 13:27 ` [PATCH] microblaze: remove CONFIG_SET_FS Arnd Bergmann
2022-02-09 13:50 ` Michal Simek
2022-02-09 13:52 ` Christoph Hellwig
2022-02-09 14:03 ` Michal Simek
2022-02-09 14:40 ` Arnd Bergmann
2022-02-09 14:44 ` Michal Simek
2022-02-09 14:54 ` Arnd Bergmann
2022-02-09 23:31 ` Stafford Horne
2022-02-11 0:17 ` Stafford Horne
2022-02-11 16:59 ` Arnd Bergmann
2022-02-11 17:46 ` Linus Torvalds
2022-02-11 20:57 ` Arnd Bergmann
2022-02-11 21:10 ` Eric W. Biederman
2022-02-11 22:21 ` Stafford Horne
2022-02-14 7:41 ` Christoph Hellwig
2022-02-14 7:50 ` Christoph Hellwig
2022-02-14 16:20 ` Arnd Bergmann
2021-12-08 20:25 ` [PATCH 04/10] exit: Stop poorly open coding do_task_dead in make_task_dead Eric W. Biederman
2022-01-05 5:58 ` Al Viro
2022-01-05 22:33 ` Eric W. Biederman
2021-12-08 20:25 ` [PATCH 05/10] exit: Stop exporting do_exit Eric W. Biederman
2022-01-05 6:02 ` Al Viro
2022-01-05 22:36 ` Eric W. Biederman
2021-12-08 20:25 ` [PATCH 06/10] exit: Implement kthread_exit Eric W. Biederman
2022-01-07 2:27 ` Al Viro
2022-01-08 18:35 ` Eric W. Biederman
2022-01-08 22:44 ` David Laight
2022-01-10 15:00 ` Eric W. Biederman
2022-01-09 3:27 ` Al Viro
2022-01-10 15:05 ` Eric W. Biederman
2021-12-08 20:25 ` [PATCH 07/10] exit: Rename module_put_and_exit to module_put_and_kthread_exit Eric W. Biederman
2021-12-08 20:25 ` [PATCH 08/10] exit: Rename complete_and_exit to kthread_complete_and_exit Eric W. Biederman
2021-12-08 20:25 ` [PATCH 09/10] kthread: Ensure struct kthread is present for all kthreads Eric W. Biederman
2021-12-22 18:19 ` Nathan Chancellor
2021-12-22 18:30 ` Eric W. Biederman
2021-12-22 18:46 ` Nathan Chancellor
2021-12-22 23:22 ` Eric W. Biederman
2021-12-23 0:37 ` Nathan Chancellor
2021-12-23 1:44 ` Linus Torvalds
2021-12-23 3:34 ` Eric W. Biederman
2021-12-23 5:19 ` [PATCH] kthread: Generalize pf_io_worker so it can point to struct kthread Eric W. Biederman
2021-12-23 17:20 ` Linus Torvalds
2022-01-07 3:59 ` [PATCH 09/10] kthread: Ensure struct kthread is present for all kthreads Al Viro
2022-01-08 18:20 ` Eric W. Biederman
2021-12-08 20:25 ` [PATCH 10/10] exit/kthread: Move the exit code for kernel threads into struct kthread Eric W. Biederman
2022-01-07 3:22 ` Al Viro
2021-12-13 22:50 ` [PATCH 0/8] signal: Cleanup of the signal->flags Eric W. Biederman
2022-01-03 21:30 ` [PATCH 00/17] exit: Making task exiting a first class concept Eric W. Biederman
2022-01-03 21:32 ` [PATCH 01/17] exit: Remove profile_task_exit & profile_munmap Eric W. Biederman
2022-01-04 7:38 ` Christoph Hellwig
2022-01-07 3:48 ` Al Viro
2022-01-08 16:10 ` Eric W. Biederman
2022-01-03 21:32 ` [PATCH 02/17] exit: Coredumps reach do_group_exit Eric W. Biederman
2022-01-03 21:32 ` [PATCH 03/17] exit: Fix the exit_code for wait_task_zombie Eric W. Biederman
2022-01-03 21:32 ` [PATCH 04/17] exit: Use the correct exit_code in /proc/<pid>/stat Eric W. Biederman
2022-01-03 21:33 ` [PATCH 05/17] taskstats: Cleanup the use of task->exit_code Eric W. Biederman
2022-01-03 21:33 ` [PATCH 06/17] ptrace: Remove second setting of PT_SEIZED in ptrace_attach Eric W. Biederman
2022-01-03 21:33 ` [PATCH 07/17] ptrace: Remove unused regs argument from ptrace_report_syscall Eric W. Biederman
2022-01-03 21:33 ` [PATCH 08/17] ptrace/m68k: Stop open coding ptrace_report_syscall Eric W. Biederman
2022-01-10 15:26 ` Geert Uytterhoeven
2022-01-10 16:20 ` Al Viro
2022-01-10 16:25 ` Al Viro
2022-01-10 17:54 ` Geert Uytterhoeven
2022-01-10 20:37 ` Al Viro
2022-01-10 21:18 ` Eric W. Biederman
2022-01-11 1:33 ` Michael Schmitz
2022-01-11 22:42 ` Finn Thain
2022-01-12 0:20 ` Michael Schmitz
2022-01-12 3:32 ` Finn Thain
2022-01-12 7:54 ` Michael Schmitz
2022-01-12 7:55 ` Geert Uytterhoeven
2022-01-12 8:05 ` Michael Schmitz
2022-01-03 21:33 ` [PATCH 09/17] ptrace: Move setting/clearing ptrace_message into ptrace_stop Eric W. Biederman
2022-01-03 21:33 ` [PATCH 10/17] ptrace: Return the signal to continue with from ptrace_stop Eric W. Biederman
2022-01-03 21:33 ` [PATCH 11/17] ptrace: Separate task->ptrace_code out from task->exit_code Eric W. Biederman
2022-01-03 21:33 ` [PATCH 12/17] signal: Compute the process exit_code in get_signal Eric W. Biederman
2022-01-03 21:33 ` [PATCH 13/17] signal: Make individual tasks exiting a first class concept Eric W. Biederman
2022-01-03 21:33 ` [PATCH 14/17] signal: Remove zap_other_threads Eric W. Biederman
2022-01-03 21:33 ` [PATCH 15/17] signal: Add JOBCTL_WILL_EXIT to mark exiting tasks Eric W. Biederman
2022-01-03 21:33 ` [PATCH 16/17] signal: Record the exit_code when an exit is scheduled Eric W. Biederman
2022-01-03 21:33 ` [PATCH 17/17] signal: Always set SIGNAL_GROUP_EXIT on process exit Eric W. Biederman
2022-03-09 0:15 ` [PATCH 00/13] Removing tracehook.h Eric W. Biederman
2022-03-09 20:58 ` Linus Torvalds
2021-12-13 22:53 ` [PATCH 1/8] signal: Make SIGKILL during coredumps an explicit special case Eric W. Biederman
2022-01-04 6:30 ` Dmitry Osipenko
2022-01-04 16:18 ` Eric W. Biederman
2022-01-05 19:58 ` Eric W. Biederman
2022-01-05 21:39 ` Dmitry Osipenko
2022-01-08 18:13 ` Eric W. Biederman
2022-01-08 18:15 ` [PATCH 1/2] signal: Have prepare_signal detect coredumps using signal->core_state Eric W. Biederman
2022-01-08 18:15 ` [PATCH 2/2] signal: Make coredump handling explicit in complete_signal Eric W. Biederman
2022-01-11 8:59 ` [PATCH 1/8] signal: Make SIGKILL during coredumps an explicit special case Dmitry Osipenko
2022-01-11 17:20 ` Eric W. Biederman
2022-01-18 17:30 ` Dmitry Osipenko
2022-01-18 17:52 ` Eric W. Biederman
2022-01-18 18:01 ` Dmitry Osipenko
2022-01-04 18:44 ` Linus Torvalds
2022-01-04 19:47 ` Eric W. Biederman
2022-01-08 19:13 ` Heiko Carstens
[not found] ` <87ilurwjju.fsf@email.froward.int.ebiederm.org>
[not found] ` <87o84juwhg.fsf@email.froward.int.ebiederm.org>
2022-01-10 23:00 ` Olivier Langlois
2022-01-11 17:28 ` Eric W. Biederman
2022-01-11 18:51 ` Eric W. Biederman
2022-01-11 19:19 ` Linus Torvalds
2022-01-15 0:12 ` Eric W. Biederman
2022-01-15 19:23 ` Olivier Langlois
2022-01-17 16:09 ` Eric W. Biederman
2022-01-17 18:46 ` io_uring truncating coredumps Eric W. Biederman
2022-01-18 4:23 ` Linus Torvalds
2022-01-26 15:06 ` [PATCH 1/8] signal: Make SIGKILL during coredumps an explicit special case Olivier Langlois
2021-12-13 22:53 ` [PATCH 2/8] signal: Drop signals received after a fatal signal has been processed Eric W. Biederman
2021-12-13 22:53 ` [PATCH 3/8] signal: Have the oom killer detect coredumps using signal->core_state Eric W. Biederman
2021-12-13 22:53 ` [PATCH 4/8] signal: During coredumps set SIGNAL_GROUP_EXIT in zap_process Eric W. Biederman
2021-12-13 22:53 ` [PATCH 5/8] signal: Remove SIGNAL_GROUP_COREDUMP Eric W. Biederman
2021-12-13 22:53 ` [PATCH 6/8] coredump: Stop setting signal->group_exit_task Eric W. Biederman
2021-12-13 22:53 ` [PATCH 7/8] signal: Rename group_exit_task group_exec_task Eric W. Biederman
2021-12-13 22:53 ` [PATCH 8/8] signal: Remove the helper signal_group_exit Eric W. Biederman
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