https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250934
Bug ID: 250934
Summary: grub-bhyve "ls" causes kernel panic
Product: Base System
Version: CURRENT
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 219438
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=219438&action=edit
kernel dump text
I'm trying to grub-bhyve the OEL8 boot disk. I initiate it as:
grub-bhyve -m /home/warlock/pit/cfg/root/oel8-device.map -r cd0 -M 4096M oel8
The device map file has this:
(hd0) /dev/zvol/zaux/oel8
(cd0) /zroot/stash/iso/oel8.2_x64_boot.iso
Those both obviously use ZFS resources. To cause the panic, I just type this:
grub> ls
The ISO is Oracle's version of RedHat 8. If it happens to be the bad actor you
can probably grab your own copy:
SHA1 (oel8.2_x64_boot.iso) = 54b1094367a80893167ad8cec37e9be638503917
That is a renamed V996905-01.iso, Hopefully you won't need to grab it yourself
(free, but they make you jump through hoops). The zdev was just created like
this:
zfs create -V64G -o volmode=dev zaux/oel8
I've attached the crash dump text, but the short version is below. The "dirty"
part is the r367433 pre-patch on top of r367430.
FreeBSD ouroboros.phouka.net 13.0-CURRENT FreeBSD 13.0-CURRENT #226
r367430+999604acfd94-c272718(master)-dirty: Fri Nov 6 12:56:43 PST 2020
[email protected]:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
...
Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 02
fault virtual address = 0x28
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff82895808
stack pointer = 0x28:0xfffffe00e0927550
frame pointer = 0x28:0xfffffe00e09275b0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 3307 (grub-bhyve)
trap number = 12
panic: page fault
cpuid = 1
time = 1604786502
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e0927200
vpanic() at vpanic+0x182/frame 0xfffffe00e0927250
panic() at panic+0x43/frame 0xfffffe00e09272b0
trap_fatal() at trap_fatal+0x387/frame 0xfffffe00e0927310
trap_pfault() at trap_pfault+0x97/frame 0xfffffe00e0927370
trap() at trap+0x2ab/frame 0xfffffe00e0927480
calltrap() at calltrap+0x8/frame 0xfffffe00e0927480
--- trap 0xc, rip = 0xffffffff82895808, rsp = 0xfffffe00e0927550, rbp =
0xfffffe00e09275b0 ---
zil_async_to_sync() at zil_async_to_sync+0x18/frame 0xfffffe00e09275b0
zvol_cdev_open() at zvol_cdev_open+0x322/frame 0xfffffe00e09275f0
devfs_open() at devfs_open+0x12f/frame 0xfffffe00e0927660
VOP_OPEN_APV() at VOP_OPEN_APV+0x35/frame 0xfffffe00e0927680
vn_open_vnode() at vn_open_vnode+0x19a/frame 0xfffffe00e0927720
vn_open_cred() at vn_open_cred+0x3d5/frame 0xfffffe00e0927870
kern_openat() at kern_openat+0x263/frame 0xfffffe00e09279c0
amd64_syscall() at amd64_syscall+0x131/frame 0xfffffe00e0927af0
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe00e0927af0
--- syscall (499, FreeBSD ELF64, sys_openat), rip = 0x8009ead4a, rsp =
0x7fffffffdea8, rbp = 0x7fffffffdf20 ---
KDB: enter: panic
Uptime: 16h31m34s
Dumping 4205 out of 32633 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%
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