[uml-devel] FW: cosmetic issue - segfault when uml kernel panics

[uml-devel] FW: cosmetic issue - segfault when uml kernel panics

[devzero]

sorry for crossposting, but this was meant for user-mode-linux-devel, not user-mode-linux-user



hi there, 

i never gave much about this, and iirc, it has always been like this - but it just came to my mind, so i`d like to give a comment here.

if you start uml just by executing ./linux, besides that kernel panic you get a rather long error message and a segmentation fault in the end.

just wondering if an end user should see that at all - is this inentional or is it just misbehaviour which not yet has been adressed ?

regards
roland



Initialized stdio console driver
Console initialized on /dev/tty0
console [tty0] enabled
Initializing software serial port version 1
console [mc-1] enabled
Couldn't stat "root_fs" : err = 2
Failed to initialize ubd device 0 :Couldn't determine size of device's file
VFS: Cannot open root device "98:0" or unknown-block(98,0)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(98,0)

EIP: 0073:[<ffffe410>] CPU: 0 Not tainted ESP: 007b:bffde5f8 EFLAGS: 00000246
 Not tainted
EAX: 00000000 EBX: 00002a61 ECX: 00000013 EDX: 00002a61
ESI: 00002a5d EDI: 00000001 EBP: bffde61c DS: 007b ES: 007b
09c5ae70: [<08069a34>] show_regs+0xb4/0xb9
09c5ae9c: [<0805889f>] panic_exit+0x25/0x3b
09c5aeb0: [<0808478c>] notifier_call_chain+0x21/0x46
09c5aed0: [<08084827>] __atomic_notifier_call_chain+0x17/0x19
09c5aeec: [<0808483e>] atomic_notifier_call_chain+0x15/0x17
09c5af08: [<080705f6>] panic+0x52/0xdd
09c5af28: [<08049a59>] mount_block_root+0xf8/0x10e
09c5af7c: [<08049abb>] mount_root+0x4c/0x54
09c5afa0: [<08049bcf>] prepare_namespace+0x10c/0x133
09c5afa8: [<08049787>] kernel_init+0x68/0x71
09c5afb4: [<08063d25>] run_kernel_thread+0x37/0x42
09c5afe0: [<08056562>] new_thread_handler+0x57/0x7e
09c5affc: [<00000000>] 0x0

Segmentation fault
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