https://bugzilla.kernel.org/show_bug.cgi?id=214913
Bug ID: 214913
Summary: [xfstests generic/051] BUG: Kernel NULL pointer
dereference on read at 0x0108 NIP
[c00372e4] tm_cgpr_active+0x14/0x40
Product: Platform S
https://bugzilla.kernel.org/show_bug.cgi?id=214913
--- Comment #1 from Zorro Lang (zl...@redhat.com) ---
Created attachment 299403
--> https://bugzilla.kernel.org/attachment.cgi?id=299403&action=edit
.config file
--
You may reply to this email to add a comment.
You are receiving this mail bec
> On 29-Oct-2021, at 11:46 AM, Nicholas Piggin wrote:
>
> Excerpts from Athira Rajeev's message of October 29, 2021 1:05 pm:
>> During Live Partition Migration (LPM), it is observed that perf
>> counter values reports zero post migration completion. However
>> 'perf stat' with workload continue
Excerpts from Michael Ellerman's message of October 29, 2021 11:15 pm:
> Nicholas Piggin writes:
>> Excerpts from Athira Rajeev's message of October 29, 2021 1:05 pm:
>>> @@ -631,12 +632,18 @@ static int pseries_migrate_partition(u64 handle)
>>> if (ret)
>>> return ret;
>>>
>>> +
On Tue, 26 Oct 2021 07:39:24 +0200, Christophe Leroy wrote:
> Commit 26973fa5ac0e ("powerpc/mm: use pte helpers in generic code")
> changed those two functions to use pte helpers to determine which
> bits to clear and which bits to set.
>
> This change was based on the assumption that bits to be s
On Thu, 14 Oct 2021 00:05:28 +0200, Anatolij Gustschin wrote:
> This series fixes localbus, memory and pci node build warnings.
> It was tested with current linux-next on digsy_mtc and tqm5200
> boards.
>
> Anatolij Gustschin (4):
> powerpc/5200: dts: add missing pci ranges
> powerpc/5200: dts
On Mon, 23 Aug 2021 15:29:12 + (UTC), Christophe Leroy wrote:
> Instructions lmw/stmw are interesting for functions that are rarely
> used and not in the cache, because only one instruction is to be
> copied into the instruction cache instead of 19. However those
> instruction are less performa
On Fri, 24 Sep 2021 19:13:53 +0200, Christophe Leroy wrote:
> CONFIG_STRICT_KERNEL_RWX should be set by default on every
> architectures (See https://github.com/KSPP/linux/issues/4)
>
> On PPC32 we have to find a compromise between performance and/or
> memory wasting and selection of strict_kernel
On Wed, 22 Sep 2021 15:37:18 +0200, Christophe Leroy wrote:
> cache_op_size() does exactly the same as l1_dcache_bytes().
>
> Remove it.
>
> MSR_64BIT already exists, no need to enclode the check
> around #ifdef __powerpc64__
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/breakpoint: Cleanup
On Thu, 28 Oct 2021 14:59:15 +0200, Christophe Leroy wrote:
> When ARCH_SUPPORTS_DEBUG_PAGEALLOC is not selected, the user can
> still select CONFIG_DEBUG_PAGEALLOC in which case __kernel_map_pages()
> is provided by mm/page_poison.c
>
> So only define __kernel_map_pages() when both
> CONFIG_ARCH_
On Thu, 16 Sep 2021 20:43:36 +0200, Christophe Leroy wrote:
> In the old days, when we didn't have kernel userspace access
> protection and had set_fs(), it was wise to use __get_user()
> and friends to read kernel memory.
>
> Nowadays, get_user() and put_user() are granting userspace access and
>
On Tue, 31 Aug 2021 08:30:24 + (UTC), Christophe Leroy wrote:
> ppc_md.iommu_save() is not set anymore by any platform after
> commit c40785ad305b ("powerpc/dart: Use a cachable DART").
> So iommu_save() has become a nop and can be removed.
>
> ppc_md.show_percpuinfo() is not set anymore by an
On Wed, 13 Oct 2021 16:43:54 +0200, Christophe Leroy wrote:
> .opd section contains function descriptors used to locate
> functions in the kernel. If someone is able to modify a
> function descriptor he will be able to run arbitrary
> kernel function instead of another.
>
> To avoid that, move .op
On Tue, 31 Aug 2021 08:29:35 + (UTC), Christophe Leroy wrote:
> Commit d75d68cfef49 ("powerpc: Clean up obsolete code relating to
> decrementer and timebase") made generic_suspend_enable_irqs() and
> generic_suspend_disable_irqs() static.
>
> Fold them into their only caller.
>
>
> [...]
Ap
On Fri, 15 Oct 2021 12:02:42 +0200, Christophe Leroy wrote:
> fsl_booke and 44x are not able to map kernel linear memory with
> pages, so they can't support DEBUG_PAGEALLOC and KFENCE, and
> STRICT_KERNEL_RWX is also a problem for now.
>
> Enable those only on book3s (both 32 and 64 except KFENCE)
On Fri, 17 Sep 2021 15:57:31 +0200, Christophe Leroy wrote:
> Long time ago we had a config item called STRICT_MM_TYPECHECKS
> to build the kernel with pte_t defined as a structure in order
> to perform additional build checks or build it with pte_t
> defined as a simple type in order to get simple
On Fri, 17 Sep 2021 15:57:12 +0200, Christophe Leroy wrote:
> In the old days, TLB handling for 8xx was using tlbie and tlbia
> instructions directly as much as possible.
>
> But commit f048aace29e0 ("powerpc/mm: Add SMP support to no-hash
> TLB handling") broke that by introducing out-of-line unn
On Thu, 16 Sep 2021 16:52:09 +0200, Christophe Leroy wrote:
> dcbz instruction shouldn't be used on non-cached memory. Using
> it on non-cached memory can result in alignment exception and
> implies a heavy handling.
>
> Instead of silentely emulating the instruction and resulting in high
> perfor
On Tue, 24 Aug 2021 13:36:13 + (UTC), Christophe Leroy wrote:
> Commit e65e1fc2d24b ("[PATCH] syscall class hookup for all normal
> targets") added generic support for AUDIT but that didn't include
> support for bi-arch like powerpc.
>
> Commit 4b58841149dc ("audit: Add generic compat syscall
On Wed, 1 Sep 2021 08:30:21 + (UTC), Christophe Leroy wrote:
> Add support for out-of-line static calls on PPC32. This change
> improve performance of calls to global function pointers by
> using direct calls instead of indirect calls.
>
> The trampoline is initialy populated with a 'blr' or b
On Tue, 26 Oct 2021 15:48:29 +0200, Christophe Leroy wrote:
> While trying to build a simple Image for ACADIA platform, I got the
> following error:
>
> WRAParch/powerpc/boot/simpleImage.acadia
> INFO: Uncompressed kernel (size 0x6ae7d0) overlaps the address of the
> wrapper(0x4
On Thu, 28 Oct 2021 15:28:22 +0800, Bixuan Cui wrote:
> Early exits from for_each_compatible_node() should decrement the
> node reference counter. Reported by Coccinelle:
>
> ./arch/powerpc/platforms/44x/fsp2.c:206:1-25: WARNING: Function
> "for_each_compatible_node" should have of_node_put() bef
On Fri, 15 Oct 2021 00:03:45 -0500, Gustavo A. R. Silva wrote:
> (!ptr && !ptr->foo) strikes again. :)
>
> The expression (!ptr && !ptr->foo) is bogus and in case ptr is NULL,
> it leads to a NULL pointer dereference: ptr->foo.
>
> Fix this by converting && to ||
>
> [...]
Applied to powerpc/ne
On Mon, 25 Oct 2021 11:26:49 +0530, Hari Bathini wrote:
> Running program with bpf-to-bpf function calls results in data access
> exception (0x300) with the below call trace:
>
> [c0113f28] bpf_int_jit_compile+0x238/0x750 (unreliable)
> [c037d2f8] bpf_check+0x2008/0x2710
>
On Thu, 28 Oct 2021 22:27:16 +0530, Vasant Hegde wrote:
> Commit 587164cd, introduced new opal message type (OPAL_MSG_PRD2) and added
> opal notifier. But I missed to unregister the notifier during module unload
> path. This results in below call trace if you try to unload and load
> opal_prd modul
On Fri, 15 Oct 2021 10:46:49 +1030, Joel Stanley wrote:
> For 64-bit book3s the default should be 64K as that's what modern CPUs
> are designed for.
>
> The following defconfigs already set CONFIG_PPC_64K_PAGES:
>
> cell_defconfig
> pasemi_defconfig
> powernv_defconfig
> ppc64_defconfig
> ps
> On 29-Oct-2021, at 6:45 PM, Michael Ellerman wrote:
>
> Nicholas Piggin mailto:npig...@gmail.com>> writes:
>> Excerpts from Athira Rajeev's message of October 29, 2021 1:05 pm:
>>> During Live Partition Migration (LPM), it is observed that perf
>>> counter values reports zero post migration c
On Thu, 14 Oct 2021 08:04:38 +1030, Joel Stanley wrote:
> The page_alloc.c code will call into __kernel_map_pages when
> DEBUG_PAGEALLOC is configured and enabled.
>
> As the implementation assumes hash, this should crash spectacularly if
> not for a bit of luck in __kernel_map_pages. In this func
On Tue, 26 Oct 2021 16:31:08 +0300, Denis Kirjanov wrote:
> p_state is unsigned since the commit 2f064a59a11f
>
> The patch also uses TASK_RUNNING instead of null.
>
>
Applied to powerpc/next.
[1/1] powerpc/xmon: fix task state output
https://git.kernel.org/powerpc/c/b1f896ce3542eb2eede5
On Wed, 27 Oct 2021 17:16:46 +1100, Michael Ellerman wrote:
> Paul is no longer handling patches for kvmppc.
>
> Instead we'll treat them as regular powerpc patches, taking them via the
> powerpc tree, using the topic/ppc-kvm branch when necessary.
>
> Also drop the web reference, it doesn't have
On Thu, 14 Oct 2021 13:44:24 +1100, Michael Ellerman wrote:
> In dcr-low.S we use cmpli with three arguments, instead of four
> arguments as defined in the ISA:
>
> cmpli cr0,r3,1024
>
> This appears to be a PPC440-ism, looking at the "PPC440x5 CPU Core
> User’s Manual" it shows cmpli hav
On Wed, 20 Oct 2021 14:47:03 -0500, Nathan Lynch wrote:
> On VMs with NX encryption, compression, and/or RNG offload, these
> capabilities are described by nodes in the ibm,platform-facilities device
> tree hierarchy:
>
> $ tree -d /sys/firmware/devicetree/base/ibm,platform-facilities/
> /sys/
On Tue, 5 Oct 2021 00:57:49 +1000, Nicholas Piggin wrote:
> The HPTE B field is a 2-bit field with values 0b10 and 0b11 reserved.
> This field is also taken from the HPTE and used when KVM executes
> TLBIEs to set the B field of those instructions.
>
> Disallow the guest setting B to a reserved va
On Thu, 28 Oct 2021 23:30:43 +1000, Nicholas Piggin wrote:
> A e5500 machine running a 32-bit kernel sometimes hangs at boot,
> seemingly going into an infinite loop of instruction storage interrupts.
> The ESR SPR has a value of 0x80 (store) when this happens, which is
> likely set by a previo
On Tue, 26 Oct 2021 22:25:31 +1000, Nicholas Piggin wrote:
> The check_return_regs_valid can cause a false positive if the return
> regs are marked as norestart and they are an HSRR type interrupt,
> because the low bit in the bottom of regs->trap causes interrupt
> type matching to fail.
>
> This
On Thu, 28 Oct 2021 00:21:50 +1000, Nicholas Piggin wrote:
> From: Laurent Vivier
>
> Commit 112665286d08 ("KVM: PPC: Book3S HV: Context tracking exit guest
> context before enabling irqs") moved guest_exit() into the interrupt
> protected area to avoid wrong context warning (or worse). The probl
On Wed, 27 Oct 2021 17:24:10 +1000, Russell Currey wrote:
> The mitigation-patching.sh script in the powerpc selftests toggles
> all mitigations on and off simultaneously, revealing that rfi_flush
> and stf_barrier cannot safely operate at the same time due to races
> in updating the static key.
>
On Mon, 25 Oct 2021 20:24:36 +1000, Russell Currey wrote:
> The EPOCHSECONDS environment variable was added in bash 5.0 (released
> 2019). Some distributions of the "stable" and "long-term" variety ship
> older versions of bash than this, so swap to using the date command
> instead.
>
> "%s" was
On Thu, 21 Oct 2021 12:56:57 +0200, Uwe Kleine-König wrote:
> Up to now mcu_gpiochip_remove() returns zero unconditionally. Make it
> return void instead which makes it easier to see in the callers that
> there is no error to handle.
>
> Also the return value of i2c remove callbacks is ignored any
On Sun, 17 Oct 2021 21:54:16 -0400, Wan Jiabing wrote:
> Fix following coccicheck warning:
> ./arch/powerpc/kexec/file_load_64.c:698:1-22: WARNING: Function
> for_each_node_by_type should have of_node_put() before goto
>
> Early exits from for_each_node_by_type should decrement the
> node referenc
On Thu, 14 Oct 2021 03:56:04 -0400, Wan Jiabing wrote:
> Fix following coccicheck warning:
>
> ./arch/powerpc/platforms/pseries/iommu.c:924:1-28: WARNING: Function
> for_each_node_with_property should have of_node_put() before break
>
> Early exits from for_each_node_with_property should decremen
Michael Ellerman wrote:
Daniel Borkmann writes:
On 10/25/21 8:15 AM, Naveen N. Rao wrote:
Hari Bathini wrote:
Running program with bpf-to-bpf function calls results in data access
exception (0x300) with the below call trace:
[c0113f28] bpf_int_jit_compile+0x238/0x750 (unreliable)
On Tue, Nov 2, 2021 at 7:38 AM Michael Ellerman
wrote:
>
> On Tue, 24 Aug 2021 13:36:13 + (UTC), Christophe Leroy wrote:
> > Commit e65e1fc2d24b ("[PATCH] syscall class hookup for all normal
> > targets") added generic support for AUDIT but that didn't include
> > support for bi-arch like powe
"Naveen N. Rao" writes:
> Michael Ellerman wrote:
>> Daniel Borkmann writes:
>>> On 10/25/21 8:15 AM, Naveen N. Rao wrote:
Hari Bathini wrote:
> Running program with bpf-to-bpf function calls results in data access
> exception (0x300) with the below call trace:
>
> [c
On Thu, Jan 14, 2021 at 11:08:03PM +1000, Nicholas Piggin wrote:
> Excerpts from Michal Suchánek's message of January 14, 2021 10:40 pm:
> > On Mon, Oct 19, 2020 at 02:50:51PM +1000, Nicholas Piggin wrote:
> >> Excerpts from Nicholas Piggin's message of October 19, 2020 11:00 am:
> >> > Excerpts fr
On Sun, Oct 31, 2021 at 10:47:22AM -0700, Dan Williams wrote:
> On Fri, Oct 15, 2021 at 4:53 PM Luis Chamberlain wrote:
> >
> > We know we don't need del_gendisk() if we haven't added
> > the disk, so just skip it. This should fix a bug on older
> > kernels, as del_gendisk() became able to deal wi
On Tue, Nov 2, 2021 at 6:48 AM Michael Ellerman wrote:
>
> "Naveen N. Rao" writes:
> > Michael Ellerman wrote:
> >> Daniel Borkmann writes:
> >>> On 10/25/21 8:15 AM, Naveen N. Rao wrote:
> Hari Bathini wrote:
> > Running program with bpf-to-bpf function calls results in data access
> >
On Sat, 2021-10-30 at 14:20 +, Joakim Tjernlund wrote:
> On Fri, 2021-10-29 at 17:14 +, Eugene Bordenkircher wrote:
> > Hello all,
> >
> > We've discovered a situation where the FSL udc driver
> > (drivers/usb/gadget/udc/fsl_udc_core.c) will enter a loop iterating over
> > the request qu
On Mon Nov 1, 2021 at 9:20 PM CDT, Finn Thain wrote:
> Hi Christopher,
>
> After many builds and tests, Stan and I were able to determine that this
> regression only affects builds with CONFIG_USER_NS=y. That is,
>
> d3ccc9781560 + CONFIG_USER_NS=y --> fail
> d3ccc9781560 + CONFIG_USER_NS=n --> oka
Michael Ellerman writes:
> On Tue, 24 Aug 2021 13:36:13 + (UTC), Christophe Leroy wrote:
>> Commit e65e1fc2d24b ("[PATCH] syscall class hookup for all normal
>> targets") added generic support for AUDIT but that didn't include
>> support for bi-arch like powerpc.
>>
>> Commit 4b58841149dc ("a
Paul Moore writes:
> On Tue, Nov 2, 2021 at 7:38 AM Michael Ellerman
> wrote:
>>
>> On Tue, 24 Aug 2021 13:36:13 + (UTC), Christophe Leroy wrote:
>> > Commit e65e1fc2d24b ("[PATCH] syscall class hookup for all normal
>> > targets") added generic support for AUDIT but that didn't include
>> >
On Fri, Oct 15, 2021 at 05:13:48PM -0700, Dan Williams wrote:
> On Fri, Oct 15, 2021 at 4:53 PM Luis Chamberlain wrote:
> >
> > If nd_integrity_init() fails we'd get del_gendisk() called,
> > but that's not correct as we should only call that if we're
> > done with device_add_disk(). Fix this by p
On Tue, Nov 2, 2021 at 5:10 PM Luis Chamberlain wrote:
>
> On Fri, Oct 15, 2021 at 05:13:48PM -0700, Dan Williams wrote:
> > On Fri, Oct 15, 2021 at 4:53 PM Luis Chamberlain wrote:
> > >
> > > If nd_integrity_init() fails we'd get del_gendisk() called,
> > > but that's not correct as we should on
On Tue, Nov 2, 2021 at 7:19 PM Michael Ellerman wrote:
> Paul Moore writes:
> > On Tue, Nov 2, 2021 at 7:38 AM Michael Ellerman
> > wrote:
> >>
> >> On Tue, 24 Aug 2021 13:36:13 + (UTC), Christophe Leroy wrote:
> >> > Commit e65e1fc2d24b ("[PATCH] syscall class hookup for all normal
> >> > t
On 11/2/21 6:49 PM, Dan Williams wrote:
> On Tue, Nov 2, 2021 at 5:10 PM Luis Chamberlain wrote:
>>
>> On Fri, Oct 15, 2021 at 05:13:48PM -0700, Dan Williams wrote:
>>> On Fri, Oct 15, 2021 at 4:53 PM Luis Chamberlain wrote:
If nd_integrity_init() fails we'd get del_gendisk() called,
>>
If of_address_to_resource() in of_instantiate_rtc() fails, previously
allocated memory res is not freed. Add missing kfree() for it.
Signed-off-by: He Ying
---
arch/powerpc/sysdev/of_rtc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/sysdev/of_rtc.c b/arch/powerpc/sysdev/of_r
Early exits from for_each_compatible_node() should decrease the
node reference count.
Signed-off-by: He Ying
---
arch/powerpc/platforms/embedded6xx/hlwd-pic.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/embedded6xx/hlwd-pic.c
b/arch/powerpc/platforms/embedded6xx/h
Hi All,
Christopher M. Riedl wrote:
Stan also tested a PowerMac G3 system and found that the regression is
not
present there. Thus far, only PowerMac G4 systems are known to be
affected
(Stan's Cube and Riccardo's PowerBook).
I actually tested right now on an iBook G3 kernel 5.14.12-1 of 2021
On Wed, Nov 03, 2021 at 10:18:57AM +1100, Michael Ellerman wrote:
> It's not in next, that notification is from the b4 thanks script, which
> didn't notice that the commit has since been reverted.
Yeah... I'm not sure how to catch that, but I'm open to suggestions.
-K
59 matches
Mail list logo
