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WARNING: CPU: 1 PID: 8393 at fs/read_write.c:517 __kernel_write+0x427/0x500 fs/read_write.c:517
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8393 Comm: kworker/1:5 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events p9_write_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:540
RIP: 0010:__kernel_write+0x427/0x500 fs/read_write.c:517
Code: fd ff ff e8 8b 07 b6 ff 45 31 c9 45 31 c0 b9 01 00 00 00 4c 89 f2 89 ee 4c 89 ef e8 23 18 12 00 e9 35 ff ff ff e8 69 07 b6 ff <0f> 0b 49 c7 c4 f7 ff ff ff e9 00 fe ff ff 4c 89 f7 e8 23 6c f5 ff
RSP: 0018:ffffc9001766fc20 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88804f8f5a40 RCX: ffffffff81bdb1a8
RDX: ffff88809a65e000 RSI: ffffffff81bdb567 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809a65e8c8
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000015
R13: ffff88804f8f5b58 R14: ffff88804f8f5ac4 R15: 000000000008001d
 kernel_write fs/read_write.c:552 [inline]
 kernel_write+0xe2/0x200 fs/read_write.c:542
 p9_fd_write net/9p/trans_fd.c:424 [inline]
 p9_write_work+0x25e/0xca0 net/9p/trans_fd.c:475
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Kernel Offset: disabled
Rebooting in 86400 seconds..