riscv/for-next test error: kernel panic: VFS: Unable to mount root fs on "/dev/vda" or unknown-block(NUM,NUM)

rdma_rxe: loaded
clk: Disabling unused clocks
PM: genpd: Disabling unused power domains
ALSA device list:
  #0: Dummy 1
  #1: Loopback 1
  #2: Virtual MIDI Card 1
check access for rdinit=/init failed: -2, ignoring
md: Skipping autodetection of RAID arrays. (raid=autodetect will force)
List of all partitions:
0100            4096 ram0 
 (driver?)
0101            4096 ram1 
 (driver?)
0102            4096 ram2 
 (driver?)
0103            4096 ram3 
 (driver?)
0104            4096 ram4 
 (driver?)
0105            4096 ram5 
 (driver?)
0106            4096 ram6 
 (driver?)
0107            4096 ram7 
 (driver?)
0108            4096 ram8 
 (driver?)
0109            4096 ram9 
 (driver?)
010a            4096 ram10 
 (driver?)
010b            4096 ram11 
 (driver?)
010c            4096 ram12 
 (driver?)
010d            4096 ram13 
 (driver?)
010e            4096 ram14 
 (driver?)
010f            4096 ram15 
 (driver?)
fd00         1048576 vda 
 driver: virtio_blk
fa00       262144000 nullb0 
 (driver?)
1f00             128 mtdblock0 
 (driver?)
No filesystem could mount root, tried: 
 fuseblk
Kernel panic - not syncing: VFS: Unable to mount root fs on "/dev/vda" or unknown-block(253,0)
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007941a>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000329a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80060b06>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80060b06>] dump_stack_lvl+0x10c/0x1a2 lib/dump_stack.c:120
[<ffffffff80060bb8>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff80003af6>] vpanic+0x2a4/0x6d4 kernel/panic.c:489
[<ffffffff80003fc6>] panic+0xa0/0xa2 kernel/panic.c:626
[<ffffffff86403b3c>] mount_root_generic+0x5cc/0x5ea init/do_mounts.c:249
[<ffffffff86403e1a>] mount_block_root init/do_mounts.c:380 [inline]
[<ffffffff86403e1a>] mount_root+0x2c0/0x2e6 init/do_mounts.c:407
[<ffffffff8640425e>] prepare_namespace+0x41e/0x498 init/do_mounts.c:491
[<ffffffff86402b88>] kernel_init_freeable+0x772/0x7a6 init/main.c:1610
[<ffffffff8634ca44>] kernel_init+0x28/0x24c init/main.c:1483
[<ffffffff800699de>] ret_from_fork_kernel+0x2a/0xbc6 arch/riscv/kernel/process.c:214
[<ffffffff863729aa>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:328
SMP: stopping secondary CPUs
Rebooting in 86400 seconds..

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Assets (help?)	Manager	Title
2025/10/21 17:05	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next	3a8660878839	252fbbad	.config	console log	report	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu2-riscv64	riscv/for-next test error: kernel panic: VFS: Unable to mount root fs on "/dev/vda" or unknown-block(NUM,NUM)
2025/10/21 04:31	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next	3a8660878839	9832ed61	.config	console log	report	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu2-riscv64	riscv/for-next test error: kernel panic: VFS: Unable to mount root fs on "/dev/vda" or unknown-block(NUM,NUM)
2025/10/20 14:59	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next	3a8660878839	d422939c	.config	console log	report	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu2-riscv64	riscv/for-next test error: kernel panic: VFS: Unable to mount root fs on "/dev/vda" or unknown-block(NUM,NUM)