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Date:      Fri, 7 Feb 2025 12:29:05 +0200
From:      Daniel Braniss <danny@cs.huji.ac.il>
To:        Freebsd-stable List <stable@freebsd.org>
Subject:   panic with today's kernel
Message-ID:  <DCBE1F8D-7BCE-45C7-9467-8AB9AB94D838@cs.huji.ac.il>
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so far I have tested it on a a bhive host and this is a diskless boot:

FreeBSD 14.2-STABLE #0 huji-8a9b4731f: Thu Feb  6 17:40:15 IST 2025
   danny@pe-55:/home/obj/pe-55/h/rnd/git/stable/14/amd64.amd64/sys/HUJI =
amd64
=E2=80=A6
Fatal trap 12: page fault while in kernel mode
cpuid =3D 2; apic id =3D 02
fault virtual address   =3D 0x10
fault code              =3D supervisor read data, page not present
instruction pointer     =3D 0x20:0xffffffff82c1fc53
stack pointer           =3D 0x28:0xfffffe00f92fbb70
frame pointer           =3D 0x28:0xfffffe00f92fbba0
code segment            =3D base 0x0, limit 0xfffff, type 0x1b
                       =3D DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
current process         =3D 139 (zfs)
rdi: fffffe00f92fbbb8 rsi: 0000000000000000 rdx: 0000000000000000
rcx: 0000000000000001  r8: 000000002ce26ec8  r9: fffffe00d9bf69e0
rax: 0000000000000000 rbx: fffffe00f92fbbb8 rbp: fffffe00f92fbba0
r10: 0000000067a5de6f r11: 000000007fff159f r12: 0000000000000000
r13: fffff800065521c0 r14: fffff800065521c0 r15: 0000000000000000
trap number             =3D 12
panic: page fault
cpuid =3D 2
time =3D 1738923631
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame =
0xfffffe00f92fb860
vpanic() at vpanic+0x161/frame 0xfffffe00f92fb990
panic() at panic+0x43/frame 0xfffffe00f92fb9f0
trap_fatal() at trap_fatal+0x40b/frame 0xfffffe00f92fba50
trap_pfault() at trap_pfault+0x46/frame 0xfffffe00f92fbaa0
calltrap() at calltrap+0x8/frame 0xfffffe00f92fbaa0
--- trap 0xc, rip =3D 0xffffffff82c1fc53, rsp =3D 0xfffffe00f92fbb70, =
rbp =3D 0xfffffe00f92fbba0 ---
unionfs_add_writecount() at unionfs_add_writecount+0x33/frame =
0xfffffe00f92fbba0
vn_truncate_locked() at vn_truncate_locked+0x5a/frame 0xfffffe00f92fbcb0
kern_truncate() at kern_truncate+0x1cf/frame 0xfffffe00f92fbe00
amd64_syscall() at amd64_syscall+0x115/frame 0xfffffe00f92fbf30
fast_syscall_common() at fast_syscall_common+0xf8/frame =
0xfffffe00f92fbf30
--- syscall (479, FreeBSD ELF64, truncate), rip =3D 0x2f96d0ced12a, rsp =
=3D 0x2f96c6a28f28, rbp =3D 0x2f96c6a28f60 ---=

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><div =
class=3D""><span style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, =
0);" class=3D"">so far I have tested it on a a bhive host and this is a =
diskless boot:</span></div><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D""><div class=3D""><span =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><br =
class=3D""></span></div>FreeBSD 14.2-STABLE #0 huji-8a9b4731f: Thu Feb =
&nbsp;6 17:40:15 IST 2025</span><br style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, =
0); color: rgb(0, 0, 0);" =
class=3D"">&nbsp;&nbsp;&nbsp;danny@pe-55:/home/obj/pe-55/h/rnd/git/stable/=
14/amd64.amd64/sys/HUJI amd64</span><div class=3D""><font =
color=3D"#000000" class=3D""><span style=3D"caret-color: rgb(0, 0, 0);" =
class=3D"">=E2=80=A6</span></font></div><div class=3D""><span =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">Fatal=
 trap 12: page fault while in kernel mode</span><br style=3D"caret-color: =
rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color:=
 rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">cpuid =3D 2; apic id =3D =
02</span><br style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D""><span style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, =
0);" class=3D"">fault virtual address &nbsp;&nbsp;=3D 0x10</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D"">fault code =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;=3D supervisor read data, page not present</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D"">instruction pointer &nbsp;&nbsp;&nbsp;&nbsp;=3D =
0x20:0xffffffff82c1fc53</span><br style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, =
0); color: rgb(0, 0, 0);" class=3D"">stack pointer =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=3D =
0x28:0xfffffe00f92fbb70</span><br style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, =
0); color: rgb(0, 0, 0);" class=3D"">frame pointer =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=3D =
0x28:0xfffffe00f92fbba0</span><br style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, =
0); color: rgb(0, 0, 0);" class=3D"">code segment =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=3D =
base 0x0, limit 0xfffff, type 0x1b</span><br style=3D"caret-color: =
rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color:=
 rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;=3D DPL 0, pres 1, long 1, def32 0, gran 1</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D"">processor eflags &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=3D =
interrupt enabled, resume, IOPL =3D 0</span><br style=3D"caret-color: =
rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color:=
 rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">current process =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=3D 139 (zfs)</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">rdi:=
 fffffe00f92fbbb8 rsi: 0000000000000000 rdx: 0000000000000000</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">rcx:=
 0000000000000001 &nbsp;r8: 000000002ce26ec8 &nbsp;r9: =
fffffe00d9bf69e0</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">rax: 0000000000000000 rbx: =
fffffe00f92fbbb8 rbp: fffffe00f92fbba0</span><br style=3D"caret-color: =
rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color:=
 rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">r10: 0000000067a5de6f =
r11: 000000007fff159f r12: 0000000000000000</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">r13:=
 fffff800065521c0 r14: fffff800065521c0 r15: 0000000000000000</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">trap=
 number =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=3D=
 12</span><br style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D""><span style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, =
0);" class=3D"">panic: page fault</span><br style=3D"caret-color: rgb(0, =
0, 0); color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: =
rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">cpuid =3D 2</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">time=
 =3D 1738923631</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">KDB: stack backtrace:</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D"">db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame =
0xfffffe00f92fb860</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">vpanic() at vpanic+0x161/frame =
0xfffffe00f92fb990</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">panic() at panic+0x43/frame =
0xfffffe00f92fb9f0</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">trap_fatal() at trap_fatal+0x40b/frame =
0xfffffe00f92fba50</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">trap_pfault() at trap_pfault+0x46/frame =
0xfffffe00f92fbaa0</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">calltrap() at calltrap+0x8/frame =
0xfffffe00f92fbaa0</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">--- trap 0xc, rip =3D =
0xffffffff82c1fc53, rsp =3D 0xfffffe00f92fbb70, rbp =3D =
0xfffffe00f92fbba0 ---</span><br style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, =
0); color: rgb(0, 0, 0);" class=3D"">unionfs_add_writecount() at =
unionfs_add_writecount+0x33/frame 0xfffffe00f92fbba0</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D"">vn_truncate_locked() at vn_truncate_locked+0x5a/frame =
0xfffffe00f92fbcb0</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">kern_truncate() at =
kern_truncate+0x1cf/frame 0xfffffe00f92fbe00</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" =
class=3D"">amd64_syscall() at amd64_syscall+0x115/frame =
0xfffffe00f92fbf30</span><br style=3D"caret-color: rgb(0, 0, 0); color: =
rgb(0, 0, 0);" class=3D""><span style=3D"caret-color: rgb(0, 0, 0); =
color: rgb(0, 0, 0);" class=3D"">fast_syscall_common() at =
fast_syscall_common+0xf8/frame 0xfffffe00f92fbf30</span><br =
style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D""><span=
 style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">--- =
syscall (479, FreeBSD ELF64, truncate), rip =3D 0x2f96d0ced12a, rsp =3D =
0x2f96c6a28f28, rbp =3D 0x2f96c6a28f60 ---</span></div></body></html>=

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