syzbot

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do not call blocking ops when !TASK_RUNNING; state=1 set at [<00000000752ebe3a>] prepare_to_wait+0xb1/0x2b0 kernel/sched/wait.c:247
WARNING: CPU: 1 PID: 1793 at kernel/sched/core.c:6746 __might_sleep+0x135/0x190 kernel/sched/core.c:6746
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 1793 Comm: syz-executor150 Not tainted 5.6.0-rc1-syzkaller #0
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+0xef/0x16e lib/dump_stack.c:118
 panic+0x2aa/0x6e1 kernel/panic.c:221
 __warn.cold+0x2f/0x30 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:__might_sleep+0x135/0x190 kernel/sched/core.c:6746
Code: 65 48 8b 1c 25 00 0f 02 00 48 8d 7b 10 48 89 fe 48 c1 ee 03 80 3c 06 00 75 2b 48 8b 73 10 48 c7 c7 c0 80 e6 85 e8 d3 d2 f5 ff <0f> 0b e9 46 ff ff ff e8 5f ee 49 00 e9 29 ff ff ff e8 55 ee 49 00
RSP: 0018:ffff8881c5f27a28 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8881cfa3b100 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff812975ed RDI: ffffed1038be4f37
RBP: ffffffff86dd9b88 R08: ffff8881cfa3b100 R09: fffffbfff1267696
R10: fffffbfff1267695 R11: ffffffff8933b4af R12: 0000000000000235
R13: 0000000000000000 R14: ffffffff83a94dfc R15: 0000000000000cc0
 slab_pre_alloc_hook mm/slab.h:565 [inline]
 slab_alloc_node mm/slub.c:2702 [inline]
 slab_alloc mm/slub.c:2786 [inline]
 kmem_cache_alloc_trace+0x24a/0x310 mm/slub.c:2803
 kmalloc include/linux/slab.h:555 [inline]
 dummy_urb_enqueue+0x7c/0x890 drivers/usb/gadget/udc/dummy_hcd.c:1250
 usb_hcd_submit_urb+0x2aa/0x2120 drivers/usb/core/hcd.c:1546
 usb_submit_urb+0x6e5/0x1460 drivers/usb/core/urb.c:570
 yurex_write+0x3e5/0x7c0 drivers/usb/misc/yurex.c:495
 __vfs_write+0x76/0x100 fs/read_write.c:494
 vfs_write+0x262/0x5c0 fs/read_write.c:558
 ksys_write+0x127/0x250 fs/read_write.c:611
 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4446a9
Code: e8 bc af 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffca999f808 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004446a9
RDX: 00000000000000e8 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00000000006cf018 R08: 000000000000000f R09: 00000000004002e0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402350
R13: 00000000004023e0 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..