Running UML from vanilla kernel 3.8.5 compiled with default kernel
configuration and booted with Fedora 18 root fs (as downloaded from
http://fs.devloop.org.uk/). Boots fine about 3/4 of the time, the rest of
the time it crashes - see output below for an example.
command line:
./linux ubd0=Fedora18-AMD64-root_fs rw mem=4096M con0=fd:0,fd:1
source code BUG() line:
BUG_ON(plug->magic != PLUG_MAGIC);
console output:
.
.
.
.
[ OK ] Started Load Random Seed.
[ OK ] Started Configure read-only root support.
[ OK ] Started udev Coldplug all Devices.
Starting udev Wait for Complete Device Initialization...
Starting Show Plymouth Boot Screen...
BUG: failure at block/blk-core.c:2985/blk_flush_plug_list()!
Kernel panic - not syncing: BUG!
Call Trace:
15f4a7d70: [<6024769a>] panic+0x145/0x2a7
15f4a7da8: [<60247555>] panic+0x0/0x2a7
15f4a7de8: [<602477fc>] printk+0x0/0xa0
15f4a7e60: [<600182c0>] _init+0x7e0/0x8b0
15f4a7e80: [<6018ae95>] blk_flush_plug_list+0x19f/0x260
15f4a7ec0: [<6004678f>] sigsuspend+0x0/0x9e
15f4a7ed0: [<600182c0>] _init+0x7e0/0x8b0
15f4a7ef0: [<6024bb90>] schedule+0x6a/0x78
15f4a7f00: [<6004532e>] set_current_blocked+0x17/0x19
15f4a7f10: [<600467eb>] sigsuspend+0x5c/0x9e
15f4a7f30: [<6001e726>] winch_thread+0x204/0x242
15f4a7fd0: [<6001e522>] winch_thread+0x0/0x242
Modules linked in: autofs4
Pid: 1598706048, comm: Not tainted 3.8.5
RIP: 6c28:[<000000015f4a5818>]
RSP: 0000000000000000 EFLAGS: 16096d530
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000015f4a53a8 RSI: 000000015f4a53a8 RDI: 000000015f4a53b8
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000015f4a5380
R10: 000000015f4a5380 R11: 0000000000000001 R12: 0000000c00000000
R13: 0000000015b9ad10 R14: 00000000515ba557 R15: 0000000015b9ad10
Call Trace:
15f4a7cc8: [<6006bba2>] __module_text_address+0x14/0x5a
15f4a7ce0: [<6001c4af>] panic_exit+0x3a/0x58
15f4a7cf0: [<6004e962>] __kernel_text_address+0x30/0x5c
15f4a7d10: [<60056554>] notifier_call_chain+0x32/0x5c
15f4a7d38: [<600182c0>] _init+0x7e0/0x8b0
15f4a7d50: [<6005658e>] __atomic_notifier_call_chain+0x10/0x12
15f4a7d60: [<600565a6>] atomic_notifier_call_chain+0x16/0x18
15f4a7d70: [<602476cd>] panic+0x178/0x2a7
15f4a7da8: [<60247555>] panic+0x0/0x2a7
15f4a7de8: [<602477fc>] printk+0x0/0xa0
15f4a7e60: [<600182c0>] _init+0x7e0/0x8b0
15f4a7e80: [<6018ae95>] blk_flush_plug_list+0x19f/0x260
15f4a7ec0: [<6004678f>] sigsuspend+0x0/0x9e
15f4a7ed0: [<600182c0>] _init+0x7e0/0x8b0
15f4a7ef0: [<6024bb90>] schedule+0x6a/0x78
15f4a7f00: [<6004532e>] set_current_blocked+0x17/0x19
15f4a7f10: [<600467eb>] sigsuspend+0x5c/0x9e
15f4a7f30: [<6001e726>] winch_thread+0x204/0x242
15f4a7fd0: [<6001e522>] winch_thread+0x0/0x242
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