The patch titled
Fix lguest oops when guest dies while receiving I/O
has been removed from the -mm tree. Its filename was
lguest-the-host-code-fix-lguest-oops-when-guest-dies-while-receiving-i-o.patch
This patch was dropped because it was folded into lguest-the-host-code.patch
------------------------------------------------------
Subject: Fix lguest oops when guest dies while receiving I/O
From: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
lguest needs to hold a reference to its task in case it exits while another
Guest is sending it I/O. Otherwise we can oops in
access_process_vm->get_task_mm->task_lock().
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/lguest/lguest_user.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletion(-)
diff -puN drivers/lguest/lguest_user.c~lguest-the-host-code-fix-lguest-oops-when-guest-dies-while-receiving-i-o drivers/lguest/lguest_user.c
--- a/drivers/lguest/lguest_user.c~lguest-the-host-code-fix-lguest-oops-when-guest-dies-while-receiving-i-o
+++ a/drivers/lguest/lguest_user.c
@@ -107,7 +107,8 @@ static int initialize(struct file *file,
setup_regs(lg->regs, args[2]);
setup_guest_gdt(lg);
lg->tsk = current;
- lg->mm = get_task_mm(current);
+ get_task_struct(lg->tsk);
+ lg->mm = get_task_mm(lg->tsk);
lg->last_pages = NULL;
mutex_unlock(&lguest_lock);
@@ -160,6 +161,7 @@ static int close(struct inode *inode, st
mutex_lock(&lguest_lock);
release_all_dma(lg);
free_guest_pagetable(lg);
+ put_task_struct(lg->tsk);
mmput(lg->mm);
if (!IS_ERR(lg->dead))
kfree(lg->dead);
_
Patches currently in -mm which might be from rusty@xxxxxxxxxxxxxxx are
origin.patch
____call_usermodehelper-dont-flush_signals.patch
wait_for_helper-remove-unneeded-do_sigaction.patch
futex-new-private-futexes.patch
compiler-introduce-__used-and-__maybe_unused.patch
xfs-clean-up-shrinker-games.patch
mm-merge-populate-and-nopage-into-fault-fixes-nonlinear-fix.patch
mm-clean-up-and-kernelify-shrinker-registration.patch
add-ability-to-keep-track-of-callers-of-symbol_getput.patch
update-mtd-use-of-symbol_getput.patch
update-dvb-use-of-symbol_getput.patch
lguest-export-symbols-for-lguest-as-a-module.patch
lguest-the-guest-code.patch
lguest-the-host-code.patch
lguest-the-host-code-fix-lguest-oops-when-guest-dies-while-receiving-i-o.patch
lguest-the-host-code-simplification-dont-pin-guest-trap-handlers.patch
lguest-the-host-code-properly-kill-guest-userspace-programs-accessing-kernel-mem.patch
lguest-the-host-code-remove-put_user-etc-warnings-add-bloat.patch
lguest-the-host-code-fix-obscure-but-nasty-cow-bug.patch
lguest-the-host-code-lguest-use-standard-bootloader-format-fix-badly-sized.patch
lguest-the-asm-offsets.patch
lguest-the-makefile-and-kconfig.patch
lguest-the-console-driver.patch
lguest-the-net-driver.patch
lguest-the-net-driver-lguest-2621-mm1-update-lguest-net-stats-inlinepatch.patch
lguest-the-net-driver-two-net-bugfixes.patch
lguest-the-block-driver.patch
lguest-the-documentation-example-launcher.patch
lguest-the-documentation-example-launcher-fix-lguest-documentation-error.patch
lguest-documentation-and-example-updates.patch
lguest-the-documentation-example-launcher-dont-use-paravirt_probe-its-dying-doc.patch
lguest-use-standard-bootloader-format-fix-badly-sized-doc.patch
lguest-two-net-bugfixes-doc.patch
lguest-the-host-code-vs-futex-new-private-futexes.patch
mm-clean-up-and-kernelify-shrinker-registration-reiser4.patch
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