Date: Wed, 05 Nov 2025 21:07:20 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 290098] bhyve crashes when trying to run a 9front VM Message-ID: <bug-290098-27103-XVQr786j8H@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-290098-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-290098-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D290098 --- Comment #17 from Bakul Shah <bakul@iitbombay.org> --- Finally getting around to this.... I set a breakpoint on the line in question and ran bhyve until the assert was triggered. I don't know PCI or bhyve code well but happy to work with anyone to track this down. Note also that a netbsd vm dies on the same assert. Running bhyve under gdb I see [Switching to LWP 252876 of process 93322] Thread 20 "vcpu 0" hit Breakpoint 1, modify_bar_registration (pi=3D0x801e2a= 900, idx=3D0, registration=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 706 assert(error =3D=3D 0); (gdb) c Continuing. Thread 20 "vcpu 0" hit Breakpoint 1, modify_bar_registration (pi=3D0x801e2a= c00, idx=3D0, registration=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 706 assert(error =3D=3D 0); (gdb) Continuing. Thread 20 "vcpu 0" hit Breakpoint 1, modify_bar_registration (pi=3D0x801e2a= 900, idx=3D0, registration=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 706 assert(error =3D=3D 0); (gdb) Continuing. Thread 20 "vcpu 0" hit Breakpoint 1, modify_bar_registration (pi=3D0x801e2a= c00, idx=3D0, registration=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 706 assert(error =3D=3D 0); (gdb) Continuing. Thread 20 "vcpu 0" hit Breakpoint 1, modify_bar_registration (pi=3D0x801e2a= 900, idx=3D0, registration=3Dregistration@entry=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 706 assert(error =3D=3D 0); (gdb) c Continuing. Thread 20 "vcpu 0" hit Breakpoint 1, modify_bar_registration (pi=3D0x801e2a= 900, idx=3D0, registration=3Dregistration@entry=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 706 assert(error =3D=3D 0); (gdb) Continuing. Thread 20 "vcpu 0" hit Breakpoint 1, modify_bar_registration (pi=3D0x801e2a= c00, idx=3D0, registration=3Dregistration@entry=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 706 assert(error =3D=3D 0); (gdb) Continuing. Thread 20 "vcpu 0" hit Breakpoint 1, modify_bar_registration (pi=3D0x801e2a= c00, idx=3D0, registration=3Dregistration@entry=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 706 assert(error =3D=3D 0); (gdb) Continuing. Assertion failed: (error =3D=3D 0), function modify_bar_registration, file /usr/src/usr.sbin/bhyve/pci_emul.c, line 706. Thread 20 "vcpu 0" received signal SIGABRT, Aborted. Sent by thr_kill() from pid 93322 and user 0. 0x0000000801b409ea in thr_kill () from /lib/libsys.so.7 (gdb) where #0 0x0000000801b409ea in thr_kill () from /lib/libsys.so.7 #1 0x00000008018c8804 in raise () from /lib/libc.so.7 #2 0x0000000801979969 in abort () from /lib/libc.so.7 #3 0x00000008018ab3f1 in __assert () from /lib/libc.so.7 #4 0x0000000001067d27 in modify_bar_registration (pi=3D0x801e2af00, idx=3D= 1, registration=3Dregistration@entry=3D1) at /usr/src/usr.sbin/bhyve/pci_emul.c:706 #5 0x00000000010679a9 in register_bar (pi=3D0x3dbcc, idx=3D6) at /usr/src/usr.sbin/bhyve/pci_emul.c:723 #6 0x00000000010677f6 in pci_cfgrw (in=3D<optimized out>, bus=3D<optimized= out>, slot=3D<optimized out>, func=3D<optimized out>, coff=3D<optimized out>, bytes=3D<optimized out>, valp=3D0x7fffddbead0c) at /usr/src/usr.sbin/bhyve/pci_emul.c:2367 #7 0x0000000001068134 in pci_emul_cfgdata (ctx=3D<optimized out>, in=3D252= 876, port=3D<optimized out>, bytes=3D0, eax=3D<optimized out>, arg=3D<optimi= zed out>) at /usr/src/usr.sbin/bhyve/pci_emul.c:2468 #8 0x0000000001080a89 in emulate_inout (ctx=3D0x801e1a000, vcpu=3D0x801e0d= 060, vmexit=3Dvmexit@entry=3D0x7fffddbeaec8) at /usr/src/usr.sbin/bhyve/amd64/inout.c:222 #9 0x000000000107de50 in vmexit_inout (ctx=3D0x3dbcc, vcpu=3D0x6, vmrun=3D<optimized out>) at /usr/src/usr.sbin/bhyve/amd64/vmexit.c:84 #10 0x0000000001050740 in vm_loop (ctx=3D0x801e1a000, vcpu=3D0x801e0d060) at /usr/src/usr.sbin/bhyve/bhyverun.c:651 #11 0x000000000104f4c7 in fbsdrun_start_thread (param=3D0x801e0b040) at /usr/src/usr.sbin/bhyve/bhyverun.c:563 #12 0x00000008011d0d21 in ?? () from /lib/libthr.so.3 #13 0x0000000000000000 in ?? () Backtrace stopped: Cannot access memory at address 0x7fffddbeb000 --=20 You are receiving this mail because: You are the assignee for the bug.=
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