OCI: Ubuntu Instance Fails to Boot With Kernel Panic “Not syncing: VFS: Unable to mount root fs
APPLIES TO:
Oracle Cloud Infrastructure
Linux x86-64
SYMPTOMS
On OCI Ubuntu Instance, After Installing a new Kernel the Instance no longer boots using the latest kernel, it stops booting at
[ 1.347327] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 1.347941] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.15.0-1052-oracle #58-Ubuntu [ 1.348971] Hardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021 [ 1.349611] Call trace: [ 1.349846] dump_backtrace+0x0/0x200 [ 1.350207] show_stack+0x20/0x2c [ 1.350533] dump_stack_lvl+0x68/0x84 [ 1.351191] dump_stack+0x18/0x34 [ 1.353123] panic+0x1b0/0x3a0 [ 1.355128] mount_block_root+0x15c/0x20c [ 1.355490] mount_root+0x128/0x148 [ 1.355805] prepare_namespace+0x13c/0x19c [ 1.356171] kernel_init_freeable+0x134/0x154 [ 1.356611] kernel_init+0x2c/0x160 [ 1.356949] ret_from_fork+0x10/0x20 [ 1.358061] SMP: stopping secondary CPUs [ 1.362826] Kernel Offset: 0x10000 from 0xffff800008000000 [ 1.363460] PHYS_OFFSET: 0x40000000 [ 1.363787] CPU features: 0x0,000085c1,23302e42 [ 1.364165] Memory Limit: none [ 1.364430] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---
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