From: Zhang Yanmin
The patch is for fix the below kernel panic:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [] selinux_socket_sock_rcv_skb+0x65/0x2a0
Call Trace:
[] security_sock_rcv_skb+0x4c/0x60
[] sk_filter+0x41/0x210
[] sock_queue_rcv_skb+0x53/0x3a0
[] raw_rcv+0
here,
perf might access a ruined pt_regs when saving userspace callchain.
If app is 64bit, it doesn't go through this path. sysret_check keeps
rsp pointing to pt_regs before executing sysretq to exit to user space.
The patch fixes it by keeping rsp pointing to pt_regs like 64bit path.
Signed-off
a bad
pt_regs.
The patch fixes it by keeping rsp pointing to pt_regs.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu Shuox
---
arch/x86/ia32/ia32entry.S | 11 ++-
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 4
nk. Before calling,
sysexit_from_sys_call already pops up pt_regs, then trace_hardirqs_on_thunk
would reuse pt_regs space. If perf NMI happens here, perf might use a bad
pt_regs.
The patch fixes it by keeping rsp pointing under pt_regs->ip.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
arch/x86/
On Thu 5.Jun'14 at 9:19:19 +0200, Peter Zijlstra wrote:
On Thu, Jun 05, 2014 at 10:36:10AM +0800, Liu ShuoX wrote:
From: Zhang Yanmin
We hit a kernel panic when running perf to collect some performance data.
kenel is x86_64 and user space apps are 32bit.
[ 71.965351, 1] [ Bin
From: Zhang Yanmin
We hit a kernel panic when running perf to collect some performance data.
kenel is x86_64 and user space apps are 32bit.
[ 71.965351, 1] [ Binder_2] BUG: unable to handle kernel NULL pointer
dereference at 0004
[ 71.965360, 1] [ Binder_2] IP: []
On Tue 6.May'14 at 10:48:00 -0400, Paul Gortmaker wrote:
On 14-05-06 01:03 AM, Liu ShuoX wrote:
for pstore record test.
I don't know what kind of cc mechanism you were manually deploying
when using git send-email here, but it is customary to actually
Sorry. This is my first time t
Some developers want to output the pstore record trace flexible.
So add seq_ops into ramoops_zone in case users would make private output
format.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 10 --
include/linux/pstore_ramoops.h | 1 +
2
dump the records in runtime is useful sometime. We could check the
records and understand driver's and device's status.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 39 +++
fs/pstore/internal.h |
for pstore record test.
Signed-off-by: Liu ShuoX
---
arch/x86/kernel/setup.c | 2 +
fs/pstore/Makefile | 2 +-
fs/pstore/test.c| 170
3 files changed, 173 insertions(+), 1 deletion(-)
create mode 100644 fs/pstore/test.c
diff
store codes and new tracers which are based on ramoops.
Developer could add a new tracer based on ramoops standalone and pstore detects
it automatically.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
Documentation/ramoops.txt | 71 -
arch/x86/kernel/vmlinux.
function at runtime by code.
3) Fix some minor issues.
Changelog v3:
1) Fix compiling errors when CONFIG_PSTORE_RAM=m.
Changelog v2:
1) Fix compiling errors when CONFIG_PSTORE_RAM is disabled.
2) Add some protection in the code in case we disable CONFIG_PSTORE_RAM.
---
Liu ShuoX (2
store codes and new tracers which are based on ramoops.
Developer could add a new tracer based on ramoops standalone and pstore detects
it automatically.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
Documentation/ramoops.txt | 70 -
arch/x86/kernel/vmlinux.
Some developers want to output the pstore record trace flexible.
So add seq_ops into ramoops_zone in case users would make private output
format.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 10 --
include/linux/pstore_ramoops.h | 1 +
2
dump the records in runtime is useful sometime. We could check the
records and understand driver's and device's status.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 39 +++
fs/pstore/internal.h |
) Fix some minor issues.
Changelog v3:
1) Fix compiling errors when CONFIG_PSTORE_RAM=m.
Changelog v2:
1) Fix compiling errors when CONFIG_PSTORE_RAM is disabled.
2) Add some protection in the code in case we disable CONFIG_PSTORE_RAM.
---
Liu ShuoX (2):
pstore: add seq_ops for norm zone
Some developers want to output the pstore record trace flexible.
So add seq_ops into ramoops_zone in case users would make private output
format.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 10 --
include/linux/pstore_ramoops.h | 1 +
2
dump the records in runtime is useful sometime. We could check the
records and understand driver's and device's status.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 39 +++
fs/pstore/internal.h |
store codes and new tracers which are based on ramoops.
Developer could add a new tracer based on ramoops standalone and pstore detects
it automatically.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
Documentation/ramoops.txt | 70 +-
arch/x86/k
Hi,
Here are the v3 of this series.
Changelog v3:
1) Fix compiling errors when CONFIG_PSTORE_RAM=m.
Changelog v2:
1) Fix compiling errors when CONFIG_PSTORE_RAM is disabled.
2) Add some protection in the code in case we disable CONFIG_PSTORE_RAM.
---
Liu ShuoX (2):
pstore: add seq_ops
From: Liu ShuoX
dump the records in runtime is useful sometime. We could check the
records and understand driver's and device's status.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 32 ++--
fs/pstore/internal.h
From: Liu ShuoX
Some developers want to output the pstore record trace flexible.
So add seq_ops into ramoops_zone in case users would make private output
format.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 10 --
include/linux
ramoops standalone and pstore detects
it automatically.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
Documentation/ramoops.txt | 70 ++-
arch/x86/kernel/vmlinux.lds.S | 9 ++
drivers/platform/chrome/chromeos_pstore.c | 2 +-
fs/psto
Some developers want to output the pstore record trace flexible.
So add seq_ops into ramoops_zone in case users would make private output
format.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 10 --
include/linux/pstore_ramoops.h | 1 +
2
dump the records in runtime is useful sometime. We could check the
records and understand driver's and device's status.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
fs/pstore/inode.c | 32 ++--
fs/pstore/internal.h | 3 ++-
store codes and new tracers which are based on ramoops.
Developer could add a new tracer based on ramoops standalone and pstore detects
it automatically.
Signed-off-by: Zhang Yanmin
Signed-off-by: Liu ShuoX
---
Documentation/ramoops.txt | 70 ++-
arch/x86/k
On Tue 11.Mar'14 at 13:37:23 -0700, Kees Cook wrote:
On Mon, Mar 10, 2014 at 11:17 PM, Liu ShuoX wrote:
From: Liu ShuoX
In case that ramoops_init_przs failed, max_dump_cnt won't be reset to
zero in error handle path.
Signed-off-by: Liu ShuoX
---
fs/pstore/ram.c | 4 ++--
1 file
From: Liu ShuoX
In case that ramoops_init_przs failed, max_dump_cnt won't be reset to
zero in error handle path.
Signed-off-by: Liu ShuoX
---
fs/pstore/ram.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 6f96d8c..52
These two patches are applied on top of patches:
https://lkml.org/lkml/2014/3/3/368
It has been added in -mm tree. Below is the first patch, and i will
send the second by replying this one.
From: Liu ShuoX
ramoops_get_next_prz get the prz according the paramters. If it get a
uninitialized prz
On Tue 4.Mar'14 at 11:11:11 -0800, Kees Cook wrote:
On Mon, Mar 3, 2014 at 5:40 PM, Liu ShuoX wrote:
On Mon 3.Mar'14 at 11:45:59 -0800, Kees Cook wrote:
On Thu, Feb 27, 2014 at 10:37 PM, wrote:
From: Liu ShuoX
ftrace_read_cnt need to be reset in open to support mutli tim
On Mon 3.Mar'14 at 11:45:59 -0800, Kees Cook wrote:
On Thu, Feb 27, 2014 at 10:37 PM, wrote:
From: Liu ShuoX
ftrace_read_cnt need to be reset in open to support mutli times
getting the records.
Signed-off-by: Liu ShuoX
---
fs/pstore/ram.c | 1 +
1 file changed, 1 insertion(+)
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