]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mm/kasan: prevent deadlock in kasan reporting
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Fri, 6 Nov 2015 02:50:51 +0000 (18:50 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 6 Nov 2015 03:34:48 +0000 (19:34 -0800)
commitfc5aeeaf593278f07ffa4d97296e27423ecae867
tree17b6521e9f9ba2d43d6d0b4d416d5a599e561980
parentf2377d4eaab2aabe1938b3974b5b94f5ba4c7ead
mm/kasan: prevent deadlock in kasan reporting

When we end up calling kasan_report in real mode, our shadow mapping for
the spinlock variable will show poisoned.  This will result in us calling
kasan_report_error with lock_report spin lock held.  To prevent this
disable kasan reporting when we are priting error w.r.t kasan.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/kasan/report.c