/*
 * Copyright 2015, Michael Neuling, IBM Corp.
 * Licensed under GPLv2.
 *
 * Test the kernel's signal return code to ensure that it doesn't
 * crash when both the transactional and suspend MSR bits are set in
 * the signal context.
 *
 * For this test, we send ourselves a SIGUSR1.  In the SIGUSR1 handler
 * we modify the signal context to set both MSR TM S and T bits (which
 * is "reserved" by the PowerISA). When we return from the signal
 * handler (implicit sigreturn), the kernel should detect reserved MSR
 * value and send us with a SIGSEGV.
 */

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>

#include "utils.h"
#include "tm.h"

int segv_expected = 0;

void signal_segv(int signum)
{
	if (segv_expected && (signum == SIGSEGV))
		_exit(0);
	_exit(1);
}

void signal_usr1(int signum, siginfo_t *info, void *uc)
{
	ucontext_t *ucp = uc;

	/* Link tm checkpointed context to normal context */
	ucp->uc_link = ucp;
	/* Set all TM bits so that the context is now invalid */
#ifdef __powerpc64__
	ucp->uc_mcontext.gp_regs[PT_MSR] |= (7ULL << 32);
#else
	ucp->uc_mcontext.uc_regs->gregs[PT_MSR] |= (7ULL);
#endif
	/* Should segv on return becuase of invalid context */
	segv_expected = 1;
}

int tm_signal_msr_resv()
{
	struct sigaction act;

	SKIP_IF(!have_htm());

	act.sa_sigaction = signal_usr1;
	sigemptyset(&act.sa_mask);
	act.sa_flags = SA_SIGINFO;
	if (sigaction(SIGUSR1, &act, NULL) < 0) {
		perror("sigaction sigusr1");
		exit(1);
	}
	if (signal(SIGSEGV, signal_segv) == SIG_ERR)
		exit(1);

	raise(SIGUSR1);

	/* We shouldn't get here as we exit in the segv handler */
	return 1;
}

int main(void)
{
	return test_harness(tm_signal_msr_resv, "tm_signal_msr_resv");
}
365135d43f861003555c963b309672d053a2228'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/include/media/blackfin?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/media/blackfin?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/media/blackfin?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/media/blackfin'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/media?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>media</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>blackfin</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='3365135d43f861003555c963b309672d053a2228'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:44:32 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:44:32 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>3365135d43f861003555c963b309672d053a2228</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/media/blackfin?id=3365135d43f861003555c963b309672d053a2228'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>bfef4adec5da118bf1b3df7e5cff74f45af9e02d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/media/blackfin?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>include/media/blackfin</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>5906374446386fd16fe562b042429d905d231ec3</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/media/blackfin?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228&amp;id2=5906374446386fd16fe562b042429d905d231ec3'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin?h=nds-private-remove&amp;id=e0d76fa4475ef2cf4b52d18588b8ce95153d021b'>e0d76fa4475ef2cf4b52d18588b8ce95153d021b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/media/blackfin?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228&amp;id2=e0d76fa4475ef2cf4b52d18588b8ce95153d021b'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'xfs-for-linus-4.10-rc6-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux</div><div class='commit-msg'>Pull xfs uodates from Darrick Wong:
 "I have some more fixes this week: better input validation, corruption
  avoidance, build fixes, memory leak fixes, and a couple from Christoph
  to avoid an ENOSPC failure.

  Summary:
   - Fix race conditions in the CoW code
   - Fix some incorrect input validation checks
   - Avoid crashing fs by running out of space when freeing inodes
   - Fix toctou race wrt whether or not an inode has an attr
   - Fix build error on arm
   - Fix page refcount corruption when readahead fails
   - Don't corrupt userspace in the bmap ioctl"

* tag 'xfs-for-linus-4.10-rc6-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: prevent quotacheck from overloading inode lru
  xfs: fix bmv_count confusion w/ shared extents
  xfs: clear _XBF_PAGES from buffers when readahead page
  xfs: extsize hints are not unlikely in xfs_bmap_btalloc
  xfs: remove racy hasattr check from attr ops
  xfs: use per-AG reservations for the finobt
  xfs: only update mount/resv fields on success in __xfs_ag_resv_init
  xfs: verify dirblocklog correctly
  xfs: fix COW writeback race
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>Diffstat</a> (limited to 'include/media/blackfin')</div><table summary='diffstat' class='diffstat'>