kentry: A stable bugfix and a bunch of improvements
Get series with b4
b4 am [email protected]Versions newest first · linked by author and title
Patches in v4 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/9 | x86/dumpstack: Remove unnecessary range check fetching opcode bytesarch/ | +0 | 0 replies | |
| 2/9 | x86/kthread,dumpstack: Set task_pt_regs->cs.RPL=3 for kernel threadsarch/ arch/ | +15 | 1 reply | |
| 3/9 | x86/entry: Convert ret_from_fork to Carch/ arch/ arch/ +4 more | +43 | 2 replies | |
| 4/9 | kentry: Simplify the common syscall APIarch/ include/ kernel/ | +54 | 2 replies | |
| 5/9 | kentry: Remove enter_from/exit_to_user_mode()include/ kernel/ | +0 | 1 reply | |
| 6/9 | entry: Make CONFIG_DEBUG_ENTRY available outside x86arch/ lib/ | +11 | 0 replies | |
| 7/9 | kentry: Add debugging checks for proper kentry API usagekernel/ | +80 | 2 replies | |
| 8/9 | kentry: Check that syscall entries and syscall exits matchinclude/ init/ kernel/ | +35 | 0 replies | |
| 9/9 | kentry: Verify kentry state in instrumentation_begin/end()arch/ include/ include/ +1 more | +33 | 0 replies |
Reviews trailers per patch
3 of 9 patches have a Reviewed-by or Acked-by.
| Patch | Mark Rutland | Josh Poimboeuf |
|---|---|---|
| 1/9 | ||
| 2/9 | A-b | |
| 3/9 | A-b | |
| 4/9 | A-b | |
| 5/9 | ||
| 6/9 | ||
| 7/9 | ||
| 8/9 | ||
| 9/9 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH v4 0/9] kentry: A stable bugfix and a bunch of improvements
I noticed a little bug in fast compat syscalls. I got a bit carried away fixing it. This renames the irqentry stuff to kentry, improves (IMNSHO) the API, and adds lots of debugging.
It also tweaks the unwinder wrt ret_from_fork and rewrites ret_from_fork in C. I did this because the kentry work involved a small change to ret_from_fork, and adjusting the asm is a mess. So C it is.
Changes from v3: Get rid of arm64 special cases
Changes from v1 and v2: Complete rewrite
Andy Lutomirski (9):
x86/dumpstack: Remove unnecessary range check fetching opcode bytes x86/kthread,dumpstack: Set task_pt_regs->cs.RPL=3 for kernel threads x86/entry: Convert ret_from_fork to C
kentry: Simplify the common syscall API
kentry: Remove enter_from/exit_to_user_mode()
entry: Make CONFIG_DEBUG_ENTRY available outside x86
kentry: Add debugging checks for proper kentry API usage
kentry: Check that syscall entries and syscall exits match
kentry: Verify kentry state in instrumentation_begin/end()
arch/x86/Kconfig.debug | 10 -- arch/x86/entry/common.c | 78 ++++++++++---- arch/x86/entry/entry_32.S | 51 ++------- arch/x86/entry/entry_64.S | 33 ++---- arch/x86/include/asm/switch_to.h | 2 +- arch/x86/kernel/dumpstack.c | 10 +- arch/x86/kernel/process.c | 15 ++- arch/x86/kernel/process_32.c | 2 +- arch/x86/kernel/traps.c | 4 +- arch/x86/kernel/unwind_orc.c | 2 +- include/asm-generic/bug.h | 8 +- include/linux/entry-common.h | 127 +++-------------------- include/linux/instrumentation.h | 25 ++++- include/linux/sched.h | 4 + init/init_task.c | 8 ++ kernel/entry/common.c | 173 ++++++++++++++++++++----------- lib/Kconfig.debug | 11 ++ 17 files changed, 267 insertions(+), 296 deletions(-)
Signature · 1 line
2.30.2