syzbot

random: crng init done
==================================================================
BUG: KMSAN: uninit-value in virtnet_poll+0x5c8/0x1420 drivers/net/virtio_net.c:1275
CPU: 0 PID: 8 Comm: ksoftirqd/0 Not tainted 4.17.0+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1368
 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:634
 virtnet_poll+0x5c8/0x1420 drivers/net/virtio_net.c:1275
 napi_poll net/core/dev.c:5735 [inline]
 net_rx_action+0x766/0x1a80 net/core/dev.c:5801
 __do_softirq+0x592/0x979 kernel/softirq.c:285
 run_ksoftirqd+0x24/0x40 kernel/softirq.c:649
 smpboot_thread_fn+0x4ac/0x9a0 kernel/smpboot.c:164
 kthread+0x4db/0x6c0 kernel/kthread.c:241
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415

Local variable description: ----list@net_rx_action
Variable was created at:
 net_rx_action+0x6e/0x1a80 net/core/dev.c:5779
 __do_softirq+0x592/0x979 kernel/softirq.c:285
==================================================================
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8 Comm: ksoftirqd/0 Tainted: G    B             4.17.0+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 panic+0x3d0/0x990 kernel/panic.c:184
 kmsan_report+0x29e/0x2a0 mm/kmsan/kmsan.c:1387
 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:634
 virtnet_poll+0x5c8/0x1420 drivers/net/virtio_net.c:1275
 napi_poll net/core/dev.c:5735 [inline]
 net_rx_action+0x766/0x1a80 net/core/dev.c:5801
 __do_softirq+0x592/0x979 kernel/softirq.c:285
 run_ksoftirqd+0x24/0x40 kernel/softirq.c:649
 smpboot_thread_fn+0x4ac/0x9a0 kernel/smpboot.c:164
 kthread+0x4db/0x6c0 kernel/kthread.c:241
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..