Revision 10f1d5d111e8aed46a0f1179faf9a3cf422f689e authored by Joe Thornber on 27 June 2014, 19:29:04 UTC, committed by Mike Snitzer on 10 July 2014, 20:44:14 UTC
There's a race condition between the atomic_dec_and_test(&io->count) in dec_count() and the waking of the sync_io() thread. If the thread is spuriously woken immediately after the decrement it may exit, making the on stack io struct invalid, yet the dec_count could still be using it. Fix this race by using a completion in sync_io() and dec_count(). Reported-by: Minfei Huang <huangminfei@ucloud.cn> Signed-off-by: Joe Thornber <thornber@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org
1 parent bf14299
File | Mode | Size |
---|---|---|
boot | ||
configs | ||
crypto | ||
ia32 | ||
include | ||
kernel | ||
kvm | ||
lguest | ||
lib | ||
math-emu | ||
mm | ||
net | ||
oprofile | ||
pci | ||
platform | ||
power | ||
realmode | ||
syscalls | ||
tools | ||
um | ||
vdso | ||
video | ||
xen | ||
.gitignore | -rw-r--r-- | 62 bytes |
Kbuild | -rw-r--r-- | 316 bytes |
Kconfig | -rw-r--r-- | 77.1 KB |
Kconfig.cpu | -rw-r--r-- | 15.0 KB |
Kconfig.debug | -rw-r--r-- | 9.8 KB |
Makefile | -rw-r--r-- | 9.6 KB |
Makefile.um | -rw-r--r-- | 1.6 KB |
Makefile_32.cpu | -rw-r--r-- | 3.1 KB |
Computing file changes ...