KASAN: stack-out-of-bounds Read in _

kmem_cache 161KB 165KB Out of memory: Kill process 7764 (syz-executor613) score 0 or sacrifice child Killed process 7770 (syz-executor613) total-vm:18964kB, anon-rss:2124kB, file-rss:4kB, shmem-rss:0kB oom_reaper: reaped process 7770 (syz-executor613), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB ================================================================== BUG: KASAN: stack-out-of-bounds in schedule_debug kernel/sched/core.c:3284 [inline] BUG: KASAN: stack-out-of-bounds in __schedule+0x1c1b/0x21d0 kernel/sched/core.c:3394 Read of size 8 at addr ffff8881ce710000 by task kworker/u4:4/2620 CPU: 1 PID: 2620 Comm: kworker/u4:4 Not tainted 4.20.0-rc5+ #266 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) Call Trace: The buggy address belongs to the page: page:ffffea000739c400 count:1 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 dead000000000100 dead000000000200 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ce70ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 ffff8881ce70ff80: f1 00 00 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 >ffff8881ce710000: f2 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 ^ ffff8881ce710080: f2 00 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 ffff8881ce710100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 2620 Comm: kworker/u4:4 Tainted: G B 4.20.0-rc5+ #266 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) Call Trace: oom_reaper: reaped process 7789 (syz-executor613), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB rsyslogd invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null), order=0, oom_score_adj=0 rsyslogd cpuset=/ mems_allowed=0 Kernel Offset: disabled Rebooting in 86400 seconds..