Backport from the upstream crash-gcore.
commit 1ba701c1d7bd94cc5a02f51652712acdcbf0875c
Author: Vincent Whitchurch <vincent.whitchurch@axis.com>
Date: Tue Jun 21 09:15:33 2022 +0000
coredump: fix segmentation fault caused by type mismatch
crash gcore command on ARM sometimes results in segmentation fault:
crash> gcore -v 0
Segmentation fault (core dumped)
This is caused by type mismatch of a variable paddr in function
gcore_readmem_user() to hold a physical address, which is indicated by
the following warning message:
libgcore/gcore_coredump.c: In function ‘gcore_readmem_user’:
libgcore/gcore_coredump.c:85:26: warning: passing argument 2 of
‘uvtop_quiet’ from incompatible pointer type
[-Wincompatible-pointer-types]
if (!uvtop_quiet(addr, &paddr)) {
^~~~~~
libgcore/gcore_coredump.c:71:49: note: expected ‘physaddr_t *’ {aka
‘long long unsigned int *’} but argument is of type ‘ulong *’ {aka ‘long
unsigned int *’}
static int uvtop_quiet(ulong vaddr, physaddr_t *paddr);
~~~~~~~~~~~~^~~~~
On ARM, long unsigned int has 4 byte length, while physaddr_t has 8
byte length. The mismatch causes overwriting of stack variables.
Fix this by changing the type of the variable paddr to physaddr_t.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Backport from the upstream crash-gcore.
commit 03f9360715731f18e4fdae7b30aa34b30dddcd57
Author: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Date: Sat Mar 26 21:42:02 2022 +0900
x86: Fix failure of collecting vsyscall mapping due to change of enum type of vsyscall_mode
vsyscall mapping fails to get collected because the commit
bd49e16e3339 (x86/vsyscall: Add a new vsyscall=xonly mode) merged at
kernel v5.2-rc7 added constant XONLY to the anonymous enumeration type
of variable vsyscall_mode, which made the value of constant NONE
change from 1 to 2.
This commit fixes the issue by checking the value of constant NONE
using gdb's print command and typeof operator since there's no utility
function to handle such anonymous enumeration type currently in crash
utility.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Backport from the upstream crash-gcore.
commit 4cb65a0d9168778d120920418b968d05da10989f
Author: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Date: Fri Feb 25 04:59:48 2022 -0500
gcore: fix memory allocation failure during processing NT_AUXV note
For crash dumps generated using kernel-4.18.0-365.el8 or later on
CentOS stream 8, crash gcore command fails as follows:
crash> gcore -v 7 -f 128 10604
gcore: Opening file core.10604.test-dumpfilter ...
gcore: done.
gcore: Writing ELF header ...
gcore: done.
gcore: Retrieving and writing note information ...
gcore: zero-size memory allocation! (called from 7fd558ce1e05)
Failed.
This memory allocation failure occurs in fill_auxv_note() that creates
NT_AUXV note due to saved_auxv entries of size and offset tables are
somehow 0.
This is because during the merge of the upstream kernel commit
1c33bb0507508af24fd754dd7123bd8e997fab2f (x86/elf: Support a new ELF
aux vector AT_MINSIGSTKSZ), location of saved_auxv of struct mm_struct
has been moved as workaround in order to avoid kABI breakage.
Fix this by using RHEL-specific location for saved_auxv if there is
member rh_reserved_saved_auxv in struct mm_struct.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Backport from the upstream crash-gcore.
commit 6f4357340807f70bd1999f0b88435361c583f0b9
Author: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Date: Fri Feb 25 04:51:06 2022 -0500
gcore, defs: remove definitions and initializations for saved_auxv entries of offset and size tables
saved_auxv entries of offset and size tables are now not used in the
source code by the previous commit. Let's remove definitions and
initializations for them.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Backport from the upstream crash-gcore.
commit 4731ebf085fe6322ba8c7ca14918d3cab2186cf0
Author: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Date: Fri Feb 25 04:45:37 2022 -0500
coredump: use MEMBER_{OFFSET, SIZE} instead of GCORE_{OFFSET, SIZE}
fill_auxv_note() and compat_fill_auxv_note() is called just once each
time gcore command is invoked because each process has just one
NT_AUXV. This means using MEMBER_{OFFSET, SIZE} is enough; using
GCORE_{OFFSET, SIZE} is overkill.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
This commit retries the update to the latest upstream release because
the previous commit didn't update the tarball.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
