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Date: Tue, 2 Feb 2016 02:24:32 +0800
From: kbuild test robot <lkp@...el.com>
To: Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc: kbuild-all@...org, akpm@...ux-foundation.org,
krinkin.m.u@...il.com, ying.huang@...ux.intel.com,
davej@...emonkey.org.uk, x86@...nel.org,
linux-kernel@...r.kernel.org,
Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: Re: [PATCH -mm] ubsan, x86: disable alignemnt checks for arch/x86/*
Hi Andrey,
[auto build test WARNING on next-20160201]
[cannot apply to kbuild/for-next kbuild/rc-fixes v4.5-rc2 v4.5-rc1 v4.4-rc8 v4.5-rc2]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/Andrey-Ryabinin/ubsan-x86-disable-alignemnt-checks-for-arch-x86/20160202-010948
config: i386-randconfig-c0-02020138 (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
drivers/char/tpm/tpm2-cmd.c: In function 'tpm2_unseal_trusted':
>> drivers/char/tpm/tpm2-cmd.c:600:3: warning: 'blob_handle' may be used uninitialized in this function [-Wmaybe-uninitialized]
dev_warn(chip->pdev, "0x%08x was not flushed, out of memory\n",
^
drivers/char/tpm/tpm2-cmd.c:668:6: note: 'blob_handle' was declared here
u32 blob_handle;
^
--
drivers/gpio/gpiolib-of.c: In function 'of_gpiochip_add':
>> drivers/gpio/gpiolib-of.c:221:7: warning: 'dflags' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (gpiod_hog(desc, name, lflags, dflags))
^
drivers/gpio/gpiolib-of.c:211:19: note: 'dflags' was declared here
enum gpiod_flags dflags;
^
>> drivers/gpio/gpiolib-of.c:221:7: warning: 'lflags' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (gpiod_hog(desc, name, lflags, dflags))
^
drivers/gpio/gpiolib-of.c:210:25: note: 'lflags' was declared here
enum gpio_lookup_flags lflags;
^
--
drivers/media/dvb-frontends/drx39xyj/drxj.c: In function 'drx39xxj_read_status':
>> drivers/media/dvb-frontends/drx39xyj/drxj.c:10737:33: warning: 'mer' may be used uninitialized in this function [-Wmaybe-uninitialized]
p->cnr.stat[0].svalue = mer * 100;
^
drivers/media/dvb-frontends/drx39xyj/drxj.c:10670:6: note: 'mer' was declared here
u16 mer, strength = 0;
^
>> drivers/media/dvb-frontends/drx39xyj/drxj.c:10728:38: warning: 'ber' may be used uninitialized in this function [-Wmaybe-uninitialized]
p->post_bit_error.stat[0].uvalue += ber;
^
drivers/media/dvb-frontends/drx39xyj/drxj.c:10669:6: note: 'ber' was declared here
u32 ber, cnt, err, pkt;
^
>> drivers/media/dvb-frontends/drx39xyj/drxj.c:10705:35: warning: 'err' may be used uninitialized in this function [-Wmaybe-uninitialized]
p->block_error.stat[0].uvalue += err;
^
drivers/media/dvb-frontends/drx39xyj/drxj.c:10669:16: note: 'err' was declared here
u32 ber, cnt, err, pkt;
^
--
drivers/media/tuners/tda18218.c: In function 'tda18218_attach':
>> drivers/media/tuners/tda18218.c:324:10: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (ret || val != def_regs[R00_ID]) {
^
--
In file included from drivers/spi/spidev.c:28:0:
drivers/spi/spidev.c: In function 'spidev_ioctl':
>> include/linux/slab.h:562:9: warning: 'n_ioc' may be used uninitialized in this function [-Wmaybe-uninitialized]
return __kmalloc(n * size, flags);
^
drivers/spi/spidev.c:362:12: note: 'n_ioc' was declared here
unsigned n_ioc;
^
--
fs/btrfs/send.c: In function '__iterate_backrefs':
>> fs/btrfs/send.c:1228:5: warning: 'i_size' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (offset + bctx->data_offset + bctx->extent_len > i_size)
^
--
ipc/shm.c: In function 'SyS_shmdt':
>> ipc/shm.c:1311:59: warning: 'file' may be used uninitialized in this function [-Wmaybe-uninitialized]
((vma->vm_start - addr)/PAGE_SIZE == vma->vm_pgoff) &&
^
ipc/shm.c:1234:15: note: 'file' was declared here
struct file *file;
^
--
mm/vmscan.c: In function 'shrink_zone':
>> mm/vmscan.c:2410:18: warning: 'lru_pages' may be used uninitialized in this function [-Wmaybe-uninitialized]
unsigned long lru_pages;
^
--
net/core/dev.c: In function 'validate_xmit_skb_list':
>> net/core/dev.c:2984:15: warning: 'tail' may be used uninitialized in this function [-Wmaybe-uninitialized]
tail->next = skb;
^
vim +/blob_handle +600 drivers/char/tpm/tpm2-cmd.c
954650ef Jarkko Sakkinen 2015-05-30 584 out:
954650ef Jarkko Sakkinen 2015-05-30 585 tpm_buf_destroy(&buf);
954650ef Jarkko Sakkinen 2015-05-30 586
954650ef Jarkko Sakkinen 2015-05-30 587 if (rc > 0)
954650ef Jarkko Sakkinen 2015-05-30 588 rc = -EPERM;
954650ef Jarkko Sakkinen 2015-05-30 589
954650ef Jarkko Sakkinen 2015-05-30 590 return rc;
954650ef Jarkko Sakkinen 2015-05-30 591 }
954650ef Jarkko Sakkinen 2015-05-30 592
954650ef Jarkko Sakkinen 2015-05-30 593 static void tpm2_flush_context(struct tpm_chip *chip, u32 handle)
954650ef Jarkko Sakkinen 2015-05-30 594 {
954650ef Jarkko Sakkinen 2015-05-30 595 struct tpm_buf buf;
954650ef Jarkko Sakkinen 2015-05-30 596 int rc;
954650ef Jarkko Sakkinen 2015-05-30 597
954650ef Jarkko Sakkinen 2015-05-30 598 rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT);
954650ef Jarkko Sakkinen 2015-05-30 599 if (rc) {
954650ef Jarkko Sakkinen 2015-05-30 @600 dev_warn(chip->pdev, "0x%08x was not flushed, out of memory\n",
954650ef Jarkko Sakkinen 2015-05-30 601 handle);
954650ef Jarkko Sakkinen 2015-05-30 602 return;
954650ef Jarkko Sakkinen 2015-05-30 603 }
954650ef Jarkko Sakkinen 2015-05-30 604
954650ef Jarkko Sakkinen 2015-05-30 605 tpm_buf_append_u32(&buf, handle);
954650ef Jarkko Sakkinen 2015-05-30 606
954650ef Jarkko Sakkinen 2015-05-30 607 rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "flushing context");
954650ef Jarkko Sakkinen 2015-05-30 608 if (rc)
:::::: The code at line 600 was first introduced by commit
:::::: 954650efb79f99d5c817c121bb0a7c6c53362048 tpm: seal/unseal for TPM 2.0
:::::: TO: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
:::::: CC: Peter Huewe <peterhuewe@....de>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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