From: Ira Weiny <ira.weiny@intel.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
Helge Deller <deller@gmx.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
"David S. Miller" <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Chris Zankel <chris@zankel.net>,
Max Filippov <jcmvbkbc@gmail.com>,
Dan Williams <dan.j.williams@intel.com>,
linux-snps-arc@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org,
linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org,
linux-xtensa@linux-xtensa.org, dri-devel@lists.freedesktop.org,
Christian Koenig <christian.koenig@amd.com>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH V3 10/15] arch/kmap: Define kmap_atomic_prot() for all arch's
Date: Mon, 18 May 2020 11:17:05 -0700 [thread overview]
Message-ID: <20200518181705.GD3025231@iweiny-DESK2.sc.intel.com> (raw)
In-Reply-To: <20200517173722.GA33341@roeck-us.net>
On Sun, May 17, 2020 at 10:37:22AM -0700, Guenter Roeck wrote:
> Hi,
>
> On Thu, May 07, 2020 at 07:59:58AM -0700, ira.weiny@intel.com wrote:
> > From: Ira Weiny <ira.weiny@intel.com>
> >
> > To support kmap_atomic_prot(), all architectures need to support
> > protections passed to their kmap_atomic_high() function. Pass
> > protections into kmap_atomic_high() and change the name to
> > kmap_atomic_high_prot() to match.
> >
> > Then define kmap_atomic_prot() as a core function which calls
> > kmap_atomic_high_prot() when needed.
> >
> > Finally, redefine kmap_atomic() as a wrapper of kmap_atomic_prot() with
> > the default kmap_prot exported by the architectures.
> >
> > Reviewed-by: Christoph Hellwig <hch@lst.de>
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
>
> This patch causes a variety of crashes whem booting powerpc images in qemu.
PowerPC has the same issue as microblaze and sparc.
I'm preping a patch with all three fixed which fixes the kunmap_atomic clean up
patch...
Sorry for not seeing this last night...
Hopefully this can explain all the problems. It is clearly a bug.
Ira
>
> There are lots of warnings such as:
>
> WARNING: CPU: 0 PID: 0 at lib/locking-selftest.c:743 irqsafe1_hard_spin_12+0x50/0xb0
> Modules linked in:
> CPU: 0 PID: 0 Comm: swapper Tainted: G W 5.7.0-rc5-next-20200515 #1
> NIP: c0660c7c LR: c0660c44 CTR: c0660c2c
> REGS: c1223e68 TRAP: 0700 Tainted: G W (5.7.0-rc5-next-20200515)
> MSR: 00021000 <CE,ME> CR: 28000224 XER: 20000000
>
> GPR00: c0669c78 c1223f20 c113d560 c0660c44 00000000 00000001 c1223ea8 00000001
> GPR08: 00000000 00000001 0000fffc ffffffff 88000222 00000000 00000000 00000000
> GPR16: 00000000 00000000 00000000 00000000 c0000000 00000000 00000000 c1125084
> GPR24: c1125084 c1230000 c1879538 fffffffc 00000001 00000000 c1011afc c1230000
> NIP [c0660c7c] irqsafe1_hard_spin_12+0x50/0xb0
> LR [c0660c44] irqsafe1_hard_spin_12+0x18/0xb0
> Call Trace:
> [c1223f20] [c1880000] megasas_mgmt_info+0xee4/0x1008 (unreliable)
> [c1223f40] [c0669c78] dotest+0x38/0x550
> [c1223f70] [c066aa4c] locking_selftest+0x8bc/0x1d54
> [c1223fa0] [c10e0bc8] start_kernel+0x3ec/0x510
> [c1223ff0] [c00003a0] set_ivor+0x118/0x154
> Instruction dump:
> 81420000 38e80001 3d4a0001 2c080000 91420000 90e20488 40820008 91020470
> 81290000 5529031e 7d290034 5529d97e <0f090000> 3fe0c11c 3bff3964 3bff00ac
> irq event stamp: 588
> hardirqs last enabled at (587): [<c00b9fe4>] vprintk_emit+0x1b4/0x33c
> hardirqs last disabled at (588): [<c0660c44>] irqsafe1_hard_spin_12+0x18/0xb0
> softirqs last enabled at (0): [<00000000>] 0x0
> softirqs last disabled at (0): [<00000000>] 0x0
> ---[ end trace b18fe9e172f99d03 ]---
>
> This is followed by:
>
> BUG: sleeping function called from invalid context at lib/mpi/mpi-pow.c:245
> in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 14, name: cryptomgr_test
> INFO: lockdep is turned off.
> CPU: 0 PID: 14 Comm: cryptomgr_test Tainted: G W 5.7.0-rc5-next-20200515 #1
> Call Trace:
> [ce221b58] [c008755c] ___might_sleep+0x280/0x2a8 (unreliable)
> [ce221b78] [c06bc524] mpi_powm+0x634/0xc50
> [ce221c38] [c05eafdc] rsa_dec+0x88/0x134
> [ce221c78] [c05f3b40] test_akcipher_one+0x678/0x804
> [ce221dc8] [c05f3d7c] alg_test_akcipher+0xb0/0x130
> [ce221df8] [c05ee674] alg_test.part.0+0xb4/0x458
> [ce221ed8] [c05ed2b0] cryptomgr_test+0x30/0x50
> [ce221ef8] [c007cd74] kthread+0x134/0x170
> [ce221f38] [c001433c] ret_from_kernel_thread+0x14/0x1c
> Kernel panic - not syncing: Aiee, killing interrupt handler!
> CPU: 0 PID: 14 Comm: cryptomgr_test Tainted: G W 5.7.0-rc5-next-20200515 #1
> Call Trace:
> [ce221e08] [c00530fc] panic+0x148/0x34c (unreliable)
> [ce221e68] [c0056460] do_exit+0xac0/0xb40
> [ce221eb8] [c00f5be8] find_kallsyms_symbol_value+0x0/0x128
> [ce221ed8] [c05ed2d0] crypto_alg_put+0x0/0x70
> [ce221ef8] [c007cd74] kthread+0x134/0x170
> [ce221f38] [c001433c] ret_from_kernel_thread+0x14/0x1c
>
> Bisect log is attached. The patch can not easily be reverted since
> it results in compile errors.
>
> Note that similar failures are seen with sparc32 images. Those bisect
> to a different patch, but reverting that patch doesn't fix the problem.
> The failure pattern (warnings followed by a crash in cryptomgr_test)
> is the same.
>
> Guenter
>
> ---
> # bad: [bdecf38f228bcca73b31ada98b5b7ba1215eb9c9] Add linux-next specific files for 20200515
> # good: [2ef96a5bb12be62ef75b5828c0aab838ebb29cb8] Linux 5.7-rc5
> git bisect start 'HEAD' 'v5.7-rc5'
> # good: [3674d7aa7a8e61d993886c2fb7c896c5ef85e988] Merge remote-tracking branch 'crypto/master'
> git bisect good 3674d7aa7a8e61d993886c2fb7c896c5ef85e988
> # good: [87f6f21783522e6d62127cf33ae5e95f50874beb] Merge remote-tracking branch 'spi/for-next'
> git bisect good 87f6f21783522e6d62127cf33ae5e95f50874beb
> # good: [5c428e8277d5d97c85126387d4e00aa5adde4400] Merge remote-tracking branch 'staging/staging-next'
> git bisect good 5c428e8277d5d97c85126387d4e00aa5adde4400
> # good: [f68de67ed934e7bdef4799fd7777c86f33f14982] Merge remote-tracking branch 'hyperv/hyperv-next'
> git bisect good f68de67ed934e7bdef4799fd7777c86f33f14982
> # bad: [54acd2dc52b069da59639eea0d0c92726f32fb01] mm/memblock: fix a typo in comment "implict"->"implicit"
> git bisect bad 54acd2dc52b069da59639eea0d0c92726f32fb01
> # good: [784a17aa58a529b84f7cc50f351ed4acf3bd11f3] mm: remove the pgprot argument to __vmalloc
> git bisect good 784a17aa58a529b84f7cc50f351ed4acf3bd11f3
> # good: [6cd8137ff37e9a37aee2d2a8889c8beb8eab192f] khugepaged: replace the usage of system(3) in the test
> git bisect good 6cd8137ff37e9a37aee2d2a8889c8beb8eab192f
> # bad: [6987da379826ed01b8a1cf046b67cc8cc10117cc] sparc: remove unnecessary includes
> git bisect bad 6987da379826ed01b8a1cf046b67cc8cc10117cc
> # good: [bc17b545388f64c09e83e367898e28f60277c584] mm/hugetlb: define a generic fallback for is_hugepage_only_range()
> git bisect good bc17b545388f64c09e83e367898e28f60277c584
> # good: [9b5aa5b43f957f03a1f4a9aff5f7924e2ebbc011] arch-kmap_atomic-consolidate-duplicate-code-checkpatch-fixes
> git bisect good 9b5aa5b43f957f03a1f4a9aff5f7924e2ebbc011
> # bad: [89194ba5ee31567eeee9c81101b334c8e3248198] arch/kmap: define kmap_atomic_prot() for all arch's
> git bisect bad 89194ba5ee31567eeee9c81101b334c8e3248198
> # good: [022785d2bea99f8bc2a37b7b6c525eea26f6ac59] arch-kunmap_atomic-consolidate-duplicate-code-checkpatch-fixes
> git bisect good 022785d2bea99f8bc2a37b7b6c525eea26f6ac59
> # good: [a13c2f39e3f0519ddee57d26cc66ec70e3546106] arch/kmap: don't hard code kmap_prot values
> git bisect good a13c2f39e3f0519ddee57d26cc66ec70e3546106
> # first bad commit: [89194ba5ee31567eeee9c81101b334c8e3248198] arch/kmap: define kmap_atomic_prot() for all arch's
>
>
next prev parent reply other threads:[~2020-05-18 18:17 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 14:59 [PATCH V3 00/15] Remove duplicated kmap code ira.weiny
2020-05-07 14:59 ` [PATCH V3 01/15] arch/kmap: Remove BUG_ON() ira.weiny
2020-05-07 14:59 ` [PATCH V3 02/15] arch/xtensa: Move kmap build bug out of the way ira.weiny
2020-05-07 14:59 ` [PATCH V3 03/15] arch/kmap: Remove redundant arch specific kmaps ira.weiny
2020-05-07 14:59 ` [PATCH V3 04/15] arch/kunmap: Remove duplicate kunmap implementations ira.weiny
2020-05-07 14:59 ` [PATCH V3 05/15] {x86,powerpc,microblaze}/kmap: Move preempt disable ira.weiny
2020-05-07 14:59 ` [PATCH V3 06/15] arch/kmap_atomic: Consolidate duplicate code ira.weiny
2020-05-07 14:59 ` [PATCH V3 07/15] arch/kunmap_atomic: " ira.weiny
2020-05-16 22:33 ` Guenter Roeck
2020-05-18 3:49 ` Ira Weiny
2020-05-18 4:29 ` Guenter Roeck
2020-05-18 18:11 ` Ira Weiny
2020-05-19 0:03 ` Ira Weiny
2020-05-19 2:50 ` Guenter Roeck
2020-05-19 16:29 ` Ira Weiny
2020-05-18 16:11 ` Guenter Roeck
2020-05-18 18:48 ` [PATCH] arch/{mips,sparc,microblaze,powerpc}: Don't enable pagefault/preempt twice ira.weiny
2020-05-19 16:54 ` Guenter Roeck
2020-05-19 18:40 ` Ira Weiny
2020-05-19 19:42 ` Guenter Roeck
2020-05-20 5:02 ` Ira Weiny
2020-05-20 5:13 ` Ira Weiny
2020-05-21 16:05 ` Guenter Roeck
2020-05-21 17:42 ` Ira Weiny
2020-05-21 22:27 ` Guenter Roeck
2020-05-21 22:36 ` Weiny, Ira
2020-06-03 20:57 ` Andrew Morton
2020-06-03 21:14 ` Ira Weiny
2020-06-03 23:44 ` Guenter Roeck
2020-06-04 6:18 ` Mike Rapoport
2020-06-04 6:43 ` Ira Weiny
2020-06-04 6:22 ` Ira Weiny
2020-06-04 6:37 ` Mike Rapoport
2020-06-04 6:44 ` Ira Weiny
2020-06-04 9:38 ` Guenter Roeck
2020-06-04 9:41 ` Mike Rapoport
2020-06-04 20:51 ` Ira Weiny
2020-05-21 15:14 ` Ira Weiny
2020-05-21 17:27 ` Al Viro
2020-05-21 22:20 ` Guenter Roeck
2020-05-21 22:46 ` Al Viro
2020-05-22 0:46 ` Al Viro
2020-05-22 1:11 ` Guenter Roeck
2020-05-22 1:29 ` Al Viro
2020-05-22 1:35 ` Al Viro
2020-05-22 2:28 ` Guenter Roeck
2020-05-07 14:59 ` [PATCH V3 08/15] arch/kmap: Ensure kmap_prot visibility ira.weiny
2020-05-07 14:59 ` [PATCH V3 09/15] arch/kmap: Don't hard code kmap_prot values ira.weiny
2020-05-07 14:59 ` [PATCH V3 10/15] arch/kmap: Define kmap_atomic_prot() for all arch's ira.weiny
2020-05-17 17:37 ` Guenter Roeck
2020-05-18 18:17 ` Ira Weiny [this message]
2020-05-07 14:59 ` [PATCH V3 11/15] drm: Remove drm specific kmap_atomic code ira.weiny
2020-05-07 15:00 ` [PATCH V3 12/15] kmap: Remove kmap_atomic_to_page() ira.weiny
2020-05-07 15:00 ` [PATCH V3 13/15] parisc/kmap: Remove duplicate kmap code ira.weiny
2020-05-07 20:52 ` Andrew Morton
2020-05-07 22:50 ` Ira Weiny
2020-05-07 15:00 ` [PATCH V3 14/15] sparc: Remove unnecessary includes ira.weiny
2020-05-07 15:00 ` [PATCH V3 15/15] kmap: Consolidate kmap_prot definitions ira.weiny
2020-05-07 20:53 ` Andrew Morton
2020-05-07 22:51 ` Ira Weiny
2020-05-07 22:52 ` [PATCH V3.1] " ira.weiny
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