Sven Schnelle 740f05f30a parisc: fix race condition in patching code ... Assume the following ftrace code sequence that was patched in earlier by ftrace_make_call(): PAGE A: ffc: addr of ftrace_caller() PAGE B: 000: 0x6fc10080 /* stw,ma r1,40(sp) */ 004: 0x48213fd1 /* ldw -18(r1),r1 */ 008: 0xe820c002 /* bv,n r0(r1) */ 00c: 0xe83f1fdf /* b,l,n .-c,r1 */ When a Code sequences that is to be patched spans a page break, we might have already cleared the part on the PAGE A. If an interrupt is coming in during the remap of the fixed mapping to PAGE B, it might execute the patched function with only parts of the FTRACE code cleared. To prevent this, clear the jump to our mini trampoline first, and clear the remaining parts after this. This might also happen when patch_text() patches a function that it calls during remap. Signed-off-by: Sven Schnelle <svens@stackframe.org> Cc: <stable@vger.kernel.org> # 5.2+ Signed-off-by: Helge Deller <deller@gmx.de>		2019-07-31 16:20:57 +02:00
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syscalls	parisc: Wire up clone3 syscall	2019-07-17 23:11:28 +02:00
.gitignore
alternative.c	parisc: Fix crash due alternative coding for NP iopdir_fdc bit	2019-06-06 14:25:22 +02:00
asm-offsets.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
audit.c
cache.c
compat_audit.c
drivers.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
entry.S	parisc: Wire up clone3 syscall	2019-07-17 23:11:28 +02:00
firmware.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
ftrace.c	parisc: fix race condition in patching code	2019-07-31 16:20:57 +02:00
hardware.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153	2019-05-30 11:26:32 -07:00
head.S
hpmc.S	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 150	2019-05-30 11:25:19 -07:00
inventory.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
irq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153	2019-05-30 11:26:32 -07:00
jump_label.c
kgdb.c
kprobes.c	parisc: Avoid kernel panic triggered by invalid kprobe	2019-07-17 23:11:28 +02:00
Makefile	parisc: add dynamic ftrace	2019-06-08 12:56:29 +02:00
module.c	Merge branch 'parisc-5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2019-07-09 12:08:15 -07:00
module.lds	parisc: add dynamic ftrace	2019-06-08 12:56:29 +02:00
pa7300lc.c
pacache.S	parisc: Flush ITLB in flush_tlb_all_local() only on split TLB machines	2019-07-21 11:03:02 +02:00
parisc_ksyms.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
patch.c	parisc: add spinlock to patch function	2019-06-08 12:56:26 +02:00
pci-dma.c	dma-direct: handle DMA_ATTR_NON_CONSISTENT in common code	2019-06-25 14:27:58 +02:00
pci.c
pdc_chassis.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333	2019-06-05 17:37:06 +02:00
pdc_cons.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
pdt.c
perf.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153	2019-05-30 11:26:32 -07:00
perf_asm.S	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
perf_images.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
process.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
processor.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153	2019-05-30 11:26:32 -07:00
ptrace.c	parisc: Ensure userspace privilege for ptraced processes in regset functions	2019-07-17 23:11:27 +02:00
real2.S
setup.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153	2019-05-30 11:26:32 -07:00
signal.c	signal: Remove task parameter from force_sig	2019-05-27 09:36:28 -05:00
signal32.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
signal32.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
smp.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
stacktrace.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
sys_parisc.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
sys_parisc32.c
syscall.S
time.c
topology.c
traps.c	signal: Remove the task parameter from force_sig_fault	2019-05-29 09:31:43 -05:00
unaligned.c	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2019-07-08 21:48:15 -07:00
unwind.c
vmlinux.lds.S	parisc: add dynamic ftrace	2019-06-08 12:56:29 +02:00